/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/weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:02:30,243 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:02:30,305 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:02:30,309 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:02:30,309 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:02:30,309 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:02:30,310 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:02:30,326 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:02:30,327 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:02:30,327 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:02:30,328 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:02:30,328 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:02:30,328 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:02:30,329 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:02:30,329 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:02:30,329 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:02:30,330 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:02:30,330 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:02:30,330 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:02:30,330 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:02:30,331 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:02:30,331 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:02:30,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:02:30,332 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:02:30,332 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:02:30,332 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:02:30,332 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:02:30,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:02:30,333 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:02:30,333 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:02:30,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:02:30,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:02:30,334 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:02:30,334 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:02:30,334 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:02:30,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:02:30,334 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:02:30,334 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:02:30,334 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:02:30,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:02:30,335 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:02:30,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:02:30,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:02:30,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:02:30,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:02:30,563 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:02:30,564 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:02:30,565 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c [2023-08-04 09:02:31,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:02:31,890 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:02:31,891 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c [2023-08-04 09:02:31,897 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead6324eb/73e1e6778dcd461bb4c599b79524db7b/FLAG1ac7527c6 [2023-08-04 09:02:31,908 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead6324eb/73e1e6778dcd461bb4c599b79524db7b [2023-08-04 09:02:31,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:02:31,911 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:02:31,912 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:02:31,912 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:02:31,915 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:02:31,915 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:02:31" (1/1) ... [2023-08-04 09:02:31,916 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b095863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:31, skipping insertion in model container [2023-08-04 09:02:31,916 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:02:31" (1/1) ... [2023-08-04 09:02:31,940 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:02:32,107 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c[4498,4511] [2023-08-04 09:02:32,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:02:32,131 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:02:32,155 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c[4498,4511] [2023-08-04 09:02:32,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:02:32,165 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:02:32,166 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:02:32,170 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:02:32,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32 WrapperNode [2023-08-04 09:02:32,171 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:02:32,172 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:02:32,172 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:02:32,172 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:02:32,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (1/1) ... [2023-08-04 09:02:32,185 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (1/1) ... [2023-08-04 09:02:32,217 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 390 [2023-08-04 09:02:32,217 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:02:32,218 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:02:32,218 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:02:32,218 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:02:32,225 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (1/1) ... [2023-08-04 09:02:32,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (1/1) ... [2023-08-04 09:02:32,229 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (1/1) ... [2023-08-04 09:02:32,229 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (1/1) ... [2023-08-04 09:02:32,238 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (1/1) ... [2023-08-04 09:02:32,243 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (1/1) ... [2023-08-04 09:02:32,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (1/1) ... [2023-08-04 09:02:32,247 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (1/1) ... [2023-08-04 09:02:32,251 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:02:32,251 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:02:32,251 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:02:32,252 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:02:32,252 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (1/1) ... [2023-08-04 09:02:32,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:02:32,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:02:32,292 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 09:02:32,302 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 09:02:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:02:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:02:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:02:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:02:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:02:32,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:02:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:02:32,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:02:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:02:32,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:02:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:02:32,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:02:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:02:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:02:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:02:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:02:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:02:32,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:02:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:02:32,324 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 09:02:32,413 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:02:32,415 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:02:32,771 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:02:32,901 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:02:32,901 INFO L302 CfgBuilder]: Removed 14 assume(true) statements. [2023-08-04 09:02:32,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:02:32 BoogieIcfgContainer [2023-08-04 09:02:32,903 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:02:32,905 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:02:32,905 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:02:32,908 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:02:32,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:02:31" (1/3) ... [2023-08-04 09:02:32,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66deb380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:02:32, skipping insertion in model container [2023-08-04 09:02:32,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:32" (2/3) ... [2023-08-04 09:02:32,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66deb380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:02:32, skipping insertion in model container [2023-08-04 09:02:32,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:02:32" (3/3) ... [2023-08-04 09:02:32,910 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c [2023-08-04 09:02:32,916 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:02:32,923 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:02:32,924 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:02:32,924 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:02:32,999 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:02:33,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:33,340 INFO L124 PetriNetUnfolderBase]: 278/1573 cut-off events. [2023-08-04 09:02:33,340 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:02:33,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1751 conditions, 1573 events. 278/1573 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9901 event pairs, 0 based on Foata normal form. 0/1313 useless extension candidates. Maximal degree in co-relation 904. Up to 33 conditions per place. [2023-08-04 09:02:33,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:33,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:33,376 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:02:33,388 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:33,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:33,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:33,642 INFO L124 PetriNetUnfolderBase]: 278/1573 cut-off events. [2023-08-04 09:02:33,642 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:02:33,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1751 conditions, 1573 events. 278/1573 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9901 event pairs, 0 based on Foata normal form. 0/1313 useless extension candidates. Maximal degree in co-relation 904. Up to 33 conditions per place. [2023-08-04 09:02:33,668 INFO L119 LiptonReduction]: Number of co-enabled transitions 7232 [2023-08-04 09:02:42,370 INFO L134 LiptonReduction]: Checked pairs total: 20729 [2023-08-04 09:02:42,370 INFO L136 LiptonReduction]: Total number of compositions: 277 [2023-08-04 09:02:42,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:02:42,387 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;@644e3cb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:02:42,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:02:42,395 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:02:42,395 INFO L124 PetriNetUnfolderBase]: 7/71 cut-off events. [2023-08-04 09:02:42,395 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:02:42,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:42,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:42,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:02:42,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1143040472, now seen corresponding path program 1 times [2023-08-04 09:02:42,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:42,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499030777] [2023-08-04 09:02:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:42,688 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 09:02:42,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:02:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499030777] [2023-08-04 09:02:42,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499030777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:02:42,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:02:42,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:02:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285397038] [2023-08-04 09:02:42,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:02:42,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:02:42,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:02:42,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:02:42,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:02:42,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 582 [2023-08-04 09:02:42,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 72 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 states 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 09:02:42,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:02:42,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 582 [2023-08-04 09:02:42,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:02:44,283 INFO L124 PetriNetUnfolderBase]: 11811/16445 cut-off events. [2023-08-04 09:02:44,284 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2023-08-04 09:02:44,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33254 conditions, 16445 events. 11811/16445 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 98469 event pairs, 6142 based on Foata normal form. 0/9662 useless extension candidates. Maximal degree in co-relation 26764. Up to 15468 conditions per place. [2023-08-04 09:02:44,396 INFO L140 encePairwiseOnDemand]: 578/582 looper letters, 57 selfloop transitions, 2 changer transitions 3/74 dead transitions. [2023-08-04 09:02:44,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 336 flow [2023-08-04 09:02:44,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:02:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:02:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2023-08-04 09:02:44,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4736540664375716 [2023-08-04 09:02:44,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2023-08-04 09:02:44,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2023-08-04 09:02:44,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:02:44,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2023-08-04 09:02:44,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states 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 09:02:44,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:44,435 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:44,437 INFO L175 Difference]: Start difference. First operand has 59 places, 72 transitions, 212 flow. Second operand 3 states and 827 transitions. [2023-08-04 09:02:44,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 336 flow [2023-08-04 09:02:44,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:02:44,449 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 210 flow [2023-08-04 09:02:44,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-08-04 09:02:44,453 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 09:02:44,453 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 210 flow [2023-08-04 09:02:44,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 states 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 09:02:44,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:44,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:44,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:02:44,455 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:02:44,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:44,457 INFO L85 PathProgramCache]: Analyzing trace with hash -146582344, now seen corresponding path program 1 times [2023-08-04 09:02:44,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:44,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931870186] [2023-08-04 09:02:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:44,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:44,555 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 09:02:44,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:02:44,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931870186] [2023-08-04 09:02:44,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931870186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:02:44,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544251149] [2023-08-04 09:02:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:44,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:44,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:02:44,559 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 09:02:44,561 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 09:02:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:44,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:02:44,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:02:44,680 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 09:02:44,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:02:44,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544251149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:02:44,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:02:44,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:02:44,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463761263] [2023-08-04 09:02:44,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:02:44,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:02:44,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:02:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:02:44,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:02:44,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 582 [2023-08-04 09:02:44,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states 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 09:02:44,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:02:44,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 582 [2023-08-04 09:02:44,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:02:46,097 INFO L124 PetriNetUnfolderBase]: 11417/15842 cut-off events. [2023-08-04 09:02:46,098 INFO L125 PetriNetUnfolderBase]: For 1027/1027 co-relation queries the response was YES. [2023-08-04 09:02:46,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32028 conditions, 15842 events. 11417/15842 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 92606 event pairs, 5975 based on Foata normal form. 0/9314 useless extension candidates. Maximal degree in co-relation 25539. Up to 14883 conditions per place. [2023-08-04 09:02:46,202 INFO L140 encePairwiseOnDemand]: 579/582 looper letters, 59 selfloop transitions, 2 changer transitions 1/74 dead transitions. [2023-08-04 09:02:46,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 344 flow [2023-08-04 09:02:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:02:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:02:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 828 transitions. [2023-08-04 09:02:46,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742268041237113 [2023-08-04 09:02:46,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 828 transitions. [2023-08-04 09:02:46,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 828 transitions. [2023-08-04 09:02:46,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:02:46,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 828 transitions. [2023-08-04 09:02:46,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.0) internal successors, (828), 3 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 09:02:46,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:46,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:46,212 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 210 flow. Second operand 3 states and 828 transitions. [2023-08-04 09:02:46,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 344 flow [2023-08-04 09:02:46,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 330 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:02:46,219 INFO L231 Difference]: Finished difference. Result has 58 places, 69 transitions, 204 flow [2023-08-04 09:02:46,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=58, PETRI_TRANSITIONS=69} [2023-08-04 09:02:46,220 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-08-04 09:02:46,220 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 69 transitions, 204 flow [2023-08-04 09:02:46,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states 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 09:02:46,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:46,221 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 09:02:46,232 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 09:02:46,426 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 09:02:46,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:02:46,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash -323186319, now seen corresponding path program 1 times [2023-08-04 09:02:46,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:46,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279498550] [2023-08-04 09:02:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:46,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:46,617 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 09:02:46,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:02:46,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279498550] [2023-08-04 09:02:46,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279498550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:02:46,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71820911] [2023-08-04 09:02:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:46,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:46,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:02:46,626 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 09:02:46,629 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 09:02:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:46,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:02:46,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:02:46,769 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 09:02:46,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:02:46,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71820911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:02:46,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:02:46,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:02:46,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071260227] [2023-08-04 09:02:46,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:02:46,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:02:46,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:02:46,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:02:46,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:02:46,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 582 [2023-08-04 09:02:46,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 69 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states 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 09:02:46,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:02:46,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 582 [2023-08-04 09:02:46,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:02:48,103 INFO L124 PetriNetUnfolderBase]: 11072/15362 cut-off events. [2023-08-04 09:02:48,103 INFO L125 PetriNetUnfolderBase]: For 526/526 co-relation queries the response was YES. [2023-08-04 09:02:48,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31086 conditions, 15362 events. 11072/15362 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 89938 event pairs, 4996 based on Foata normal form. 0/9053 useless extension candidates. Maximal degree in co-relation 12339. Up to 14314 conditions per place. [2023-08-04 09:02:48,194 INFO L140 encePairwiseOnDemand]: 579/582 looper letters, 62 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 09:02:48,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 346 flow [2023-08-04 09:02:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:02:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:02:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 830 transitions. [2023-08-04 09:02:48,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753722794959908 [2023-08-04 09:02:48,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 830 transitions. [2023-08-04 09:02:48,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 830 transitions. [2023-08-04 09:02:48,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:02:48,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 830 transitions. [2023-08-04 09:02:48,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:02:48,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:48,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:48,204 INFO L175 Difference]: Start difference. First operand has 58 places, 69 transitions, 204 flow. Second operand 3 states and 830 transitions. [2023-08-04 09:02:48,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 346 flow [2023-08-04 09:02:48,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:02:48,209 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 208 flow [2023-08-04 09:02:48,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2023-08-04 09:02:48,210 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-08-04 09:02:48,210 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 208 flow [2023-08-04 09:02:48,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states 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 09:02:48,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:48,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:48,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:02:48,417 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 09:02:48,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:02:48,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1640498552, now seen corresponding path program 1 times [2023-08-04 09:02:48,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:48,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408155263] [2023-08-04 09:02:48,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:48,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:48,513 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 09:02:48,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:02:48,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408155263] [2023-08-04 09:02:48,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408155263] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:02:48,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253769942] [2023-08-04 09:02:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:48,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:48,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:02:48,516 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 09:02:48,518 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 09:02:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:48,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:02:48,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:02:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:02:48,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:02:48,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253769942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:02:48,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:02:48,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:02:48,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855568043] [2023-08-04 09:02:48,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:02:48,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:02:48,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:02:48,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:02:48,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:02:48,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 582 [2023-08-04 09:02:48,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states 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 09:02:48,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:02:48,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 582 [2023-08-04 09:02:48,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:02:50,020 INFO L124 PetriNetUnfolderBase]: 12601/16918 cut-off events. [2023-08-04 09:02:50,020 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2023-08-04 09:02:50,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34199 conditions, 16918 events. 12601/16918 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 88655 event pairs, 6451 based on Foata normal form. 0/9861 useless extension candidates. Maximal degree in co-relation 13932. Up to 15423 conditions per place. [2023-08-04 09:02:50,097 INFO L140 encePairwiseOnDemand]: 579/582 looper letters, 64 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 09:02:50,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 78 transitions, 358 flow [2023-08-04 09:02:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:02:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:02:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 832 transitions. [2023-08-04 09:02:50,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765177548682703 [2023-08-04 09:02:50,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 832 transitions. [2023-08-04 09:02:50,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 832 transitions. [2023-08-04 09:02:50,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:02:50,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 832 transitions. [2023-08-04 09:02:50,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 09:02:50,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:50,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:50,106 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 208 flow. Second operand 3 states and 832 transitions. [2023-08-04 09:02:50,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 78 transitions, 358 flow [2023-08-04 09:02:50,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 78 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:02:50,111 INFO L231 Difference]: Finished difference. Result has 60 places, 69 transitions, 212 flow [2023-08-04 09:02:50,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=60, PETRI_TRANSITIONS=69} [2023-08-04 09:02:50,113 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-04 09:02:50,113 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 69 transitions, 212 flow [2023-08-04 09:02:50,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states 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 09:02:50,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:50,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:50,123 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 09:02:50,322 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 09:02:50,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:02:50,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:50,324 INFO L85 PathProgramCache]: Analyzing trace with hash -846477220, now seen corresponding path program 1 times [2023-08-04 09:02:50,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:50,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659766039] [2023-08-04 09:02:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:50,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:02:50,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:02:50,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659766039] [2023-08-04 09:02:50,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659766039] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:02:50,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676051387] [2023-08-04 09:02:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:50,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:50,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:02:50,479 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 09:02:50,496 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 09:02:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:50,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:02:50,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:02:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:02:50,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:02:50,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676051387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:02:50,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:02:50,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:02:50,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115232890] [2023-08-04 09:02:50,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:02:50,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:02:50,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:02:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:02:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:02:50,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 582 [2023-08-04 09:02:50,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 69 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 09:02:50,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:02:50,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 582 [2023-08-04 09:02:50,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:02:51,503 INFO L124 PetriNetUnfolderBase]: 7481/10556 cut-off events. [2023-08-04 09:02:51,503 INFO L125 PetriNetUnfolderBase]: For 443/443 co-relation queries the response was YES. [2023-08-04 09:02:51,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21791 conditions, 10556 events. 7481/10556 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 58315 event pairs, 3900 based on Foata normal form. 0/6329 useless extension candidates. Maximal degree in co-relation 9349. Up to 8755 conditions per place. [2023-08-04 09:02:51,552 INFO L140 encePairwiseOnDemand]: 579/582 looper letters, 69 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-04 09:02:51,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 392 flow [2023-08-04 09:02:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:02:51,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:02:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2023-08-04 09:02:51,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793814432989691 [2023-08-04 09:02:51,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2023-08-04 09:02:51,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2023-08-04 09:02:51,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:02:51,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2023-08-04 09:02:51,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states 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 09:02:51,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:51,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:51,561 INFO L175 Difference]: Start difference. First operand has 60 places, 69 transitions, 212 flow. Second operand 3 states and 837 transitions. [2023-08-04 09:02:51,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 392 flow [2023-08-04 09:02:51,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:02:51,565 INFO L231 Difference]: Finished difference. Result has 61 places, 70 transitions, 220 flow [2023-08-04 09:02:51,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=61, PETRI_TRANSITIONS=70} [2023-08-04 09:02:51,566 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 09:02:51,566 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 70 transitions, 220 flow [2023-08-04 09:02:51,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 09:02:51,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:51,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:51,577 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 09:02:51,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:51,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:02:51,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:51,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1142176187, now seen corresponding path program 1 times [2023-08-04 09:02:51,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:51,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156220050] [2023-08-04 09:02:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:51,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:02:51,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:02:51,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156220050] [2023-08-04 09:02:51,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156220050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:02:51,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537298638] [2023-08-04 09:02:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:51,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:51,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:02:51,874 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 09:02:51,876 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 09:02:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:51,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:02:51,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:02:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:02:52,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:02:52,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537298638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:02:52,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:02:52,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:02:52,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669359085] [2023-08-04 09:02:52,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:02:52,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:02:52,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:02:52,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:02:52,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:02:52,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 582 [2023-08-04 09:02:52,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 70 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 09:02:52,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:02:52,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 582 [2023-08-04 09:02:52,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:02:52,785 INFO L124 PetriNetUnfolderBase]: 5654/8133 cut-off events. [2023-08-04 09:02:52,785 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2023-08-04 09:02:52,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17296 conditions, 8133 events. 5654/8133 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 43890 event pairs, 2887 based on Foata normal form. 0/5197 useless extension candidates. Maximal degree in co-relation 7485. Up to 6163 conditions per place. [2023-08-04 09:02:52,831 INFO L140 encePairwiseOnDemand]: 579/582 looper letters, 70 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-04 09:02:52,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 402 flow [2023-08-04 09:02:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:02:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:02:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2023-08-04 09:02:52,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793814432989691 [2023-08-04 09:02:52,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2023-08-04 09:02:52,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2023-08-04 09:02:52,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:02:52,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2023-08-04 09:02:52,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states 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 09:02:52,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:52,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:52,841 INFO L175 Difference]: Start difference. First operand has 61 places, 70 transitions, 220 flow. Second operand 3 states and 837 transitions. [2023-08-04 09:02:52,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 402 flow [2023-08-04 09:02:52,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 400 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:02:52,849 INFO L231 Difference]: Finished difference. Result has 63 places, 71 transitions, 230 flow [2023-08-04 09:02:52,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=63, PETRI_TRANSITIONS=71} [2023-08-04 09:02:52,850 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2023-08-04 09:02:52,850 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 71 transitions, 230 flow [2023-08-04 09:02:52,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 09:02:52,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:52,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:52,860 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 09:02:53,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:53,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:02:53,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash 7491500, now seen corresponding path program 1 times [2023-08-04 09:02:53,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:53,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597192246] [2023-08-04 09:02:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:53,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:02:53,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:02:53,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597192246] [2023-08-04 09:02:53,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597192246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:02:53,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352992863] [2023-08-04 09:02:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:53,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:53,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:02:53,148 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 09:02:53,166 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 09:02:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:53,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:02:53,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:02:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:02:53,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:02:53,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352992863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:02:53,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:02:53,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:02:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276755979] [2023-08-04 09:02:53,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:02:53,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:02:53,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:02:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:02:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:02:53,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 582 [2023-08-04 09:02:53,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 71 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states 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 09:02:53,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:02:53,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 582 [2023-08-04 09:02:53,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:02:53,962 INFO L124 PetriNetUnfolderBase]: 5297/7618 cut-off events. [2023-08-04 09:02:53,962 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 09:02:53,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16527 conditions, 7618 events. 5297/7618 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 40455 event pairs, 3196 based on Foata normal form. 0/5013 useless extension candidates. Maximal degree in co-relation 10607. Up to 6739 conditions per place. [2023-08-04 09:02:53,995 INFO L140 encePairwiseOnDemand]: 579/582 looper letters, 71 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-04 09:02:53,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 414 flow [2023-08-04 09:02:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:02:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:02:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2023-08-04 09:02:53,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793814432989691 [2023-08-04 09:02:53,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2023-08-04 09:02:53,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2023-08-04 09:02:53,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:02:53,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2023-08-04 09:02:54,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states 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 09:02:54,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:54,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:54,003 INFO L175 Difference]: Start difference. First operand has 63 places, 71 transitions, 230 flow. Second operand 3 states and 837 transitions. [2023-08-04 09:02:54,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 414 flow [2023-08-04 09:02:54,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 412 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:02:54,023 INFO L231 Difference]: Finished difference. Result has 65 places, 72 transitions, 240 flow [2023-08-04 09:02:54,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=65, PETRI_TRANSITIONS=72} [2023-08-04 09:02:54,024 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 09:02:54,024 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 72 transitions, 240 flow [2023-08-04 09:02:54,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states 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 09:02:54,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:54,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:54,031 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 09:02:54,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:54,226 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:02:54,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:54,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2098598134, now seen corresponding path program 1 times [2023-08-04 09:02:54,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:54,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17254336] [2023-08-04 09:02:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:54,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:02:54,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:02:54,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17254336] [2023-08-04 09:02:54,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17254336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:02:54,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365241816] [2023-08-04 09:02:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:54,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:54,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:02:54,290 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 09:02:54,292 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 09:02:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:54,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:02:54,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:02:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:02:54,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:02:54,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365241816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:02:54,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:02:54,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:02:54,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013646180] [2023-08-04 09:02:54,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:02:54,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:02:54,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:02:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:02:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:02:54,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 582 [2023-08-04 09:02:54,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 72 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 09:02:54,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:02:54,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 582 [2023-08-04 09:02:54,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:02:55,026 INFO L124 PetriNetUnfolderBase]: 5284/7595 cut-off events. [2023-08-04 09:02:55,027 INFO L125 PetriNetUnfolderBase]: For 594/594 co-relation queries the response was YES. [2023-08-04 09:02:55,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16522 conditions, 7595 events. 5284/7595 cut-off events. For 594/594 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 40318 event pairs, 3341 based on Foata normal form. 0/5021 useless extension candidates. Maximal degree in co-relation 15195. Up to 7088 conditions per place. [2023-08-04 09:02:55,067 INFO L140 encePairwiseOnDemand]: 579/582 looper letters, 65 selfloop transitions, 2 changer transitions 2/81 dead transitions. [2023-08-04 09:02:55,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 81 transitions, 396 flow [2023-08-04 09:02:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:02:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:02:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 832 transitions. [2023-08-04 09:02:55,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765177548682703 [2023-08-04 09:02:55,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 832 transitions. [2023-08-04 09:02:55,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 832 transitions. [2023-08-04 09:02:55,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:02:55,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 832 transitions. [2023-08-04 09:02:55,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 09:02:55,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:55,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 09:02:55,075 INFO L175 Difference]: Start difference. First operand has 65 places, 72 transitions, 240 flow. Second operand 3 states and 832 transitions. [2023-08-04 09:02:55,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 81 transitions, 396 flow [2023-08-04 09:02:55,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:02:55,091 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 242 flow [2023-08-04 09:02:55,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2023-08-04 09:02:55,092 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 8 predicate places. [2023-08-04 09:02:55,092 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 242 flow [2023-08-04 09:02:55,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 09:02:55,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:55,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:55,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:02:55,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:55,293 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:02:55,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1022740204, now seen corresponding path program 1 times [2023-08-04 09:02:55,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:55,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89248353] [2023-08-04 09:02:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:55,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:55,374 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 09:02:55,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:02:55,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89248353] [2023-08-04 09:02:55,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89248353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:02:55,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396271172] [2023-08-04 09:02:55,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:55,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:55,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:02:55,376 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 09:02:55,387 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 09:02:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:55,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:02:55,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:02:55,539 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 09:02:55,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:02:55,555 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 09:02:55,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396271172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:02:55,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:02:55,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:02:55,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461821709] [2023-08-04 09:02:55,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:02:55,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:02:55,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:02:55,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:02:55,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:02:55,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 582 [2023-08-04 09:02:55,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 262.8) internal successors, (1314), 5 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 09:02:55,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:02:55,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 582 [2023-08-04 09:02:55,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:02:55,597 INFO L124 PetriNetUnfolderBase]: 10/23 cut-off events. [2023-08-04 09:02:55,597 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:02:55,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 23 events. 10/23 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 1 based on Foata normal form. 3/20 useless extension candidates. Maximal degree in co-relation 48. Up to 13 conditions per place. [2023-08-04 09:02:55,597 INFO L140 encePairwiseOnDemand]: 579/582 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-04 09:02:55,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 14 transitions, 58 flow [2023-08-04 09:02:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:02:55,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:02:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1030 transitions. [2023-08-04 09:02:55,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424398625429553 [2023-08-04 09:02:55,600 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1030 transitions. [2023-08-04 09:02:55,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1030 transitions. [2023-08-04 09:02:55,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:02:55,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1030 transitions. [2023-08-04 09:02:55,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 257.5) internal successors, (1030), 4 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states 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 09:02:55,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 582.0) internal successors, (2910), 5 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states 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 09:02:55,606 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 582.0) internal successors, (2910), 5 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states 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 09:02:55,606 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 242 flow. Second operand 4 states and 1030 transitions. [2023-08-04 09:02:55,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 14 transitions, 58 flow [2023-08-04 09:02:55,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:02:55,607 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2023-08-04 09:02:55,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2023-08-04 09:02:55,608 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -35 predicate places. [2023-08-04 09:02:55,608 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2023-08-04 09:02:55,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 262.8) internal successors, (1314), 5 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 09:02:55,610 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:02:55,616 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 09:02:55,815 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,SelfDestructingSolverStorable8 [2023-08-04 09:02:55,815 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:55,817 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:02:55,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:55,974 INFO L124 PetriNetUnfolderBase]: 278/1573 cut-off events. [2023-08-04 09:02:55,975 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:02:55,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1751 conditions, 1573 events. 278/1573 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9901 event pairs, 0 based on Foata normal form. 0/1313 useless extension candidates. Maximal degree in co-relation 904. Up to 33 conditions per place. [2023-08-04 09:02:55,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:55,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:55,986 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:02:55,986 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:55,986 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:55,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 305 transitions, 678 flow [2023-08-04 09:02:56,104 INFO L124 PetriNetUnfolderBase]: 278/1573 cut-off events. [2023-08-04 09:02:56,105 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:02:56,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1751 conditions, 1573 events. 278/1573 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9901 event pairs, 0 based on Foata normal form. 0/1313 useless extension candidates. Maximal degree in co-relation 904. Up to 33 conditions per place. [2023-08-04 09:02:56,118 INFO L119 LiptonReduction]: Number of co-enabled transitions 7232 [2023-08-04 09:03:05,120 INFO L134 LiptonReduction]: Checked pairs total: 20724 [2023-08-04 09:03:05,120 INFO L136 LiptonReduction]: Total number of compositions: 274 [2023-08-04 09:03:05,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:03:05,122 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;@644e3cb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:03:05,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:03:05,126 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:03:05,126 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 09:03:05,126 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:03:05,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:05,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:05,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:03:05,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:05,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1188084580, now seen corresponding path program 1 times [2023-08-04 09:03:05,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:05,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394261375] [2023-08-04 09:03:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:05,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:03:05,162 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:03:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:03:05,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:03:05,197 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:03:05,197 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:03:05,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:03:05,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:03:05,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:03:05,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:03:05,197 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:03:05,198 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:03:05,198 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:03:05,198 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:03:05,240 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:03:05,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 357 transitions, 858 flow [2023-08-04 09:03:07,465 INFO L124 PetriNetUnfolderBase]: 5491/20306 cut-off events. [2023-08-04 09:03:07,466 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:03:07,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24691 conditions, 20306 events. 5491/20306 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 214153 event pairs, 162 based on Foata normal form. 0/17336 useless extension candidates. Maximal degree in co-relation 12266. Up to 1024 conditions per place. [2023-08-04 09:03:07,630 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 357 transitions, 858 flow [2023-08-04 09:03:07,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 307 places, 357 transitions, 858 flow [2023-08-04 09:03:07,744 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:03:07,744 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 307 places, 357 transitions, 858 flow [2023-08-04 09:03:07,744 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 307 places, 357 transitions, 858 flow [2023-08-04 09:03:07,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 357 transitions, 858 flow [2023-08-04 09:03:09,508 INFO L124 PetriNetUnfolderBase]: 5491/20306 cut-off events. [2023-08-04 09:03:09,509 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:03:09,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24691 conditions, 20306 events. 5491/20306 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 214153 event pairs, 162 based on Foata normal form. 0/17336 useless extension candidates. Maximal degree in co-relation 12266. Up to 1024 conditions per place. [2023-08-04 09:03:09,941 INFO L119 LiptonReduction]: Number of co-enabled transitions 18816 [2023-08-04 09:03:17,984 INFO L134 LiptonReduction]: Checked pairs total: 77590 [2023-08-04 09:03:17,984 INFO L136 LiptonReduction]: Total number of compositions: 287 [2023-08-04 09:03:17,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:03:17,986 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;@644e3cb6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:03:17,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:03:17,990 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:03:17,990 INFO L124 PetriNetUnfolderBase]: 6/65 cut-off events. [2023-08-04 09:03:17,991 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:03:17,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:17,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:17,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:17,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1622470313, now seen corresponding path program 1 times [2023-08-04 09:03:17,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:17,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920313552] [2023-08-04 09:03:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:17,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:18,022 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 09:03:18,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:18,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920313552] [2023-08-04 09:03:18,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920313552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:18,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:03:18,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:03:18,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712695404] [2023-08-04 09:03:18,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:18,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:18,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:03:18,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-08-04 09:03:18,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 372 flow. Second operand has 3 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 0 states have call successors, (0), 0 states 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 09:03:18,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:18,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-08-04 09:03:18,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand