/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-ring-nondet.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:05:32,361 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:05:32,406 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:05:32,409 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:05:32,410 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:05:32,410 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:05:32,410 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:05:32,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:05:32,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:05:32,430 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:05:32,430 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:05:32,431 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:05:32,431 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:05:32,431 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:05:32,432 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:05:32,432 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:05:32,432 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:05:32,433 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:05:32,433 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:05:32,433 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:05:32,434 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:05:32,434 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:05:32,434 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:05:32,435 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:05:32,435 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:05:32,435 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:05:32,436 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:05:32,436 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:05:32,436 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:05:32,437 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:05:32,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:05:32,437 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:05:32,437 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:05:32,438 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:05:32,438 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:05:32,438 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:05:32,438 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:05:32,439 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:05:32,439 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:05:32,439 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:05:32,439 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:05:32,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:05:32,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:05:32,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:05:32,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:05:32,658 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:05:32,659 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:05:32,659 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-ring-nondet.wvr_bound2.c [2023-08-04 09:05:33,863 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:05:34,019 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:05:34,020 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-ring-nondet.wvr_bound2.c [2023-08-04 09:05:34,027 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca6a08895/0d60b4f082434c98a6fda996b6c6ca36/FLAGd34daa796 [2023-08-04 09:05:34,043 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca6a08895/0d60b4f082434c98a6fda996b6c6ca36 [2023-08-04 09:05:34,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:05:34,047 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:05:34,048 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:05:34,048 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:05:34,052 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:05:34,052 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,053 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f30fc77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34, skipping insertion in model container [2023-08-04 09:05:34,053 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,077 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:05:34,246 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-ring-nondet.wvr_bound2.c[4328,4341] [2023-08-04 09:05:34,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:05:34,257 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:05:34,283 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-ring-nondet.wvr_bound2.c[4328,4341] [2023-08-04 09:05:34,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:05:34,293 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:05:34,293 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:05:34,298 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:05:34,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34 WrapperNode [2023-08-04 09:05:34,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:05:34,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:05:34,300 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:05:34,300 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:05:34,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,313 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,339 INFO L138 Inliner]: procedures = 25, calls = 63, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 375 [2023-08-04 09:05:34,339 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:05:34,340 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:05:34,340 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:05:34,340 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:05:34,348 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,352 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,361 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,369 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,372 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:05:34,373 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:05:34,373 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:05:34,373 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:05:34,374 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (1/1) ... [2023-08-04 09:05:34,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:05:34,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:05:34,406 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 09:05:34,415 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 09:05:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:05:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:05:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:05:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:05:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:05:34,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:05:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:05:34,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:05:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:05:34,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:05:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:05:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:05:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:05:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:05:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:05:34,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:05:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:05:34,438 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 09:05:34,534 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:05:34,535 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:05:34,990 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:05:35,099 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:05:35,100 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:05:35,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:05:35 BoogieIcfgContainer [2023-08-04 09:05:35,102 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:05:35,103 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:05:35,103 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:05:35,106 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:05:35,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:05:34" (1/3) ... [2023-08-04 09:05:35,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@401eb57e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:05:35, skipping insertion in model container [2023-08-04 09:05:35,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:34" (2/3) ... [2023-08-04 09:05:35,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@401eb57e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:05:35, skipping insertion in model container [2023-08-04 09:05:35,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:05:35" (3/3) ... [2023-08-04 09:05:35,108 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-ring-nondet.wvr_bound2.c [2023-08-04 09:05:35,115 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:05:35,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:05:35,123 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:05:35,123 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:05:35,205 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:05:35,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:35,504 INFO L124 PetriNetUnfolderBase]: 118/790 cut-off events. [2023-08-04 09:05:35,504 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:05:35,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 790 events. 118/790 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3486 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 495. Up to 16 conditions per place. [2023-08-04 09:05:35,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:35,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:35,532 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:05:35,546 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:35,550 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:35,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:35,672 INFO L124 PetriNetUnfolderBase]: 118/790 cut-off events. [2023-08-04 09:05:35,672 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:05:35,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 790 events. 118/790 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3486 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 495. Up to 16 conditions per place. [2023-08-04 09:05:35,691 INFO L119 LiptonReduction]: Number of co-enabled transitions 9628 [2023-08-04 09:05:44,814 INFO L134 LiptonReduction]: Checked pairs total: 19828 [2023-08-04 09:05:44,814 INFO L136 LiptonReduction]: Total number of compositions: 311 [2023-08-04 09:05:44,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:05:44,832 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;@6b63afb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:05:44,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:05:44,838 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:05:44,838 INFO L124 PetriNetUnfolderBase]: 8/45 cut-off events. [2023-08-04 09:05:44,838 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:05:44,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:05:44,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:05:44,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:05:44,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:05:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1170337509, now seen corresponding path program 1 times [2023-08-04 09:05:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:05:44,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550822805] [2023-08-04 09:05:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:05:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:45,189 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 09:05:45,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:05:45,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550822805] [2023-08-04 09:05:45,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550822805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:05:45,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:05:45,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:05:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839569790] [2023-08-04 09:05:45,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:05:45,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:05:45,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:05:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:05:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:05:45,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 625 [2023-08-04 09:05:45,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:45,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:05:45,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 625 [2023-08-04 09:05:45,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:05:46,002 INFO L124 PetriNetUnfolderBase]: 5454/7717 cut-off events. [2023-08-04 09:05:46,003 INFO L125 PetriNetUnfolderBase]: For 435/435 co-relation queries the response was YES. [2023-08-04 09:05:46,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15566 conditions, 7717 events. 5454/7717 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 35633 event pairs, 2136 based on Foata normal form. 0/5383 useless extension candidates. Maximal degree in co-relation 13894. Up to 7433 conditions per place. [2023-08-04 09:05:46,044 INFO L140 encePairwiseOnDemand]: 619/625 looper letters, 59 selfloop transitions, 2 changer transitions 4/68 dead transitions. [2023-08-04 09:05:46,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 302 flow [2023-08-04 09:05:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:05:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:05:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 867 transitions. [2023-08-04 09:05:46,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624 [2023-08-04 09:05:46,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 867 transitions. [2023-08-04 09:05:46,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 867 transitions. [2023-08-04 09:05:46,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:05:46,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 867 transitions. [2023-08-04 09:05:46,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:46,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:46,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:46,082 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 166 flow. Second operand 3 states and 867 transitions. [2023-08-04 09:05:46,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 302 flow [2023-08-04 09:05:46,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:05:46,090 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 156 flow [2023-08-04 09:05:46,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2023-08-04 09:05:46,095 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-04 09:05:46,096 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 156 flow [2023-08-04 09:05:46,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:46,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:05:46,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:05:46,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:05:46,097 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:05:46,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:05:46,099 INFO L85 PathProgramCache]: Analyzing trace with hash -776026487, now seen corresponding path program 1 times [2023-08-04 09:05:46,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:05:46,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219524108] [2023-08-04 09:05:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:46,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:05:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:46,253 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 09:05:46,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:05:46,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219524108] [2023-08-04 09:05:46,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219524108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:05:46,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260563115] [2023-08-04 09:05:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:46,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:05:46,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:05:46,257 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 09:05:46,266 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 09:05:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:46,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:05:46,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:05:46,416 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 09:05:46,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:05:46,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260563115] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:05:46,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:05:46,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:05:46,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611880455] [2023-08-04 09:05:46,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:05:46,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:05:46,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:05:46,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:05:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:05:46,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 625 [2023-08-04 09:05:46,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 56 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:46,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:05:46,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 625 [2023-08-04 09:05:46,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:05:47,020 INFO L124 PetriNetUnfolderBase]: 5258/7396 cut-off events. [2023-08-04 09:05:47,020 INFO L125 PetriNetUnfolderBase]: For 422/422 co-relation queries the response was YES. [2023-08-04 09:05:47,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14932 conditions, 7396 events. 5258/7396 cut-off events. For 422/422 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 33247 event pairs, 2323 based on Foata normal form. 0/5166 useless extension candidates. Maximal degree in co-relation 14864. Up to 7074 conditions per place. [2023-08-04 09:05:47,060 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 63 selfloop transitions, 2 changer transitions 1/69 dead transitions. [2023-08-04 09:05:47,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 314 flow [2023-08-04 09:05:47,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:05:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:05:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2023-08-04 09:05:47,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4629333333333333 [2023-08-04 09:05:47,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2023-08-04 09:05:47,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2023-08-04 09:05:47,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:05:47,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2023-08-04 09:05:47,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:47,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:47,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:47,071 INFO L175 Difference]: Start difference. First operand has 52 places, 56 transitions, 156 flow. Second operand 3 states and 868 transitions. [2023-08-04 09:05:47,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 314 flow [2023-08-04 09:05:47,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 298 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:05:47,076 INFO L231 Difference]: Finished difference. Result has 47 places, 56 transitions, 148 flow [2023-08-04 09:05:47,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=47, PETRI_TRANSITIONS=56} [2023-08-04 09:05:47,077 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-08-04 09:05:47,077 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 56 transitions, 148 flow [2023-08-04 09:05:47,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.3333333333333) internal successors, (814), 3 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:47,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:05:47,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:05:47,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:05:47,283 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 09:05:47,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:05:47,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:05:47,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1264436859, now seen corresponding path program 1 times [2023-08-04 09:05:47,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:05:47,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104937011] [2023-08-04 09:05:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:47,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:05:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:47,376 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 09:05:47,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:05:47,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104937011] [2023-08-04 09:05:47,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104937011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:05:47,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512564204] [2023-08-04 09:05:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:47,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:05:47,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:05:47,381 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 09:05:47,384 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 09:05:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:47,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:05:47,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:05:47,489 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 09:05:47,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:05:47,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512564204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:05:47,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:05:47,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:05:47,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746355492] [2023-08-04 09:05:47,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:05:47,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:05:47,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:05:47,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:05:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:05:47,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 625 [2023-08-04 09:05:47,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 56 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:47,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:05:47,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 625 [2023-08-04 09:05:47,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:05:48,037 INFO L124 PetriNetUnfolderBase]: 5234/7376 cut-off events. [2023-08-04 09:05:48,037 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-04 09:05:48,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14929 conditions, 7376 events. 5234/7376 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 32774 event pairs, 2280 based on Foata normal form. 0/5198 useless extension candidates. Maximal degree in co-relation 7124. Up to 6636 conditions per place. [2023-08-04 09:05:48,074 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 67 selfloop transitions, 2 changer transitions 1/73 dead transitions. [2023-08-04 09:05:48,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 73 transitions, 322 flow [2023-08-04 09:05:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:05:48,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:05:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2023-08-04 09:05:48,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650666666666667 [2023-08-04 09:05:48,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2023-08-04 09:05:48,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2023-08-04 09:05:48,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:05:48,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2023-08-04 09:05:48,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:48,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:48,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:48,084 INFO L175 Difference]: Start difference. First operand has 47 places, 56 transitions, 148 flow. Second operand 3 states and 872 transitions. [2023-08-04 09:05:48,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 73 transitions, 322 flow [2023-08-04 09:05:48,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 73 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:05:48,086 INFO L231 Difference]: Finished difference. Result has 48 places, 56 transitions, 152 flow [2023-08-04 09:05:48,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=48, PETRI_TRANSITIONS=56} [2023-08-04 09:05:48,087 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-08-04 09:05:48,087 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 56 transitions, 152 flow [2023-08-04 09:05:48,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:48,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:05:48,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:05:48,095 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 09:05:48,292 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 09:05:48,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:05:48,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:05:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2101793923, now seen corresponding path program 1 times [2023-08-04 09:05:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:05:48,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672741445] [2023-08-04 09:05:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:48,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:05:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:48,377 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 09:05:48,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:05:48,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672741445] [2023-08-04 09:05:48,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672741445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:05:48,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355473015] [2023-08-04 09:05:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:48,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:05:48,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:05:48,380 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 09:05:48,382 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 09:05:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:48,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:05:48,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:05:48,518 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 09:05:48,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:05:48,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355473015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:05:48,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:05:48,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:05:48,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941865593] [2023-08-04 09:05:48,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:05:48,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:05:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:05:48,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:05:48,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:05:48,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 625 [2023-08-04 09:05:48,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 56 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:48,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:05:48,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 625 [2023-08-04 09:05:48,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:05:48,920 INFO L124 PetriNetUnfolderBase]: 3218/4624 cut-off events. [2023-08-04 09:05:48,920 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2023-08-04 09:05:48,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9708 conditions, 4624 events. 3218/4624 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 18743 event pairs, 1603 based on Foata normal form. 0/3398 useless extension candidates. Maximal degree in co-relation 4484. Up to 3476 conditions per place. [2023-08-04 09:05:48,945 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 72 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-04 09:05:48,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 348 flow [2023-08-04 09:05:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:05:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:05:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 876 transitions. [2023-08-04 09:05:48,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672 [2023-08-04 09:05:48,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 876 transitions. [2023-08-04 09:05:48,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 876 transitions. [2023-08-04 09:05:48,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:05:48,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 876 transitions. [2023-08-04 09:05:48,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:48,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:48,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:48,959 INFO L175 Difference]: Start difference. First operand has 48 places, 56 transitions, 152 flow. Second operand 3 states and 876 transitions. [2023-08-04 09:05:48,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 348 flow [2023-08-04 09:05:48,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 77 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:05:48,963 INFO L231 Difference]: Finished difference. Result has 49 places, 57 transitions, 160 flow [2023-08-04 09:05:48,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=49, PETRI_TRANSITIONS=57} [2023-08-04 09:05:48,964 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-08-04 09:05:48,964 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 57 transitions, 160 flow [2023-08-04 09:05:48,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:48,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:05:48,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:05:48,974 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 09:05:49,173 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 09:05:49,173 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:05:49,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:05:49,174 INFO L85 PathProgramCache]: Analyzing trace with hash 412076687, now seen corresponding path program 1 times [2023-08-04 09:05:49,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:05:49,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355107657] [2023-08-04 09:05:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:49,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:05:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:49,257 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 09:05:49,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:05:49,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355107657] [2023-08-04 09:05:49,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355107657] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:05:49,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640307004] [2023-08-04 09:05:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:49,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:05:49,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:05:49,259 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 09:05:49,281 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 09:05:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:49,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:05:49,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:05:49,385 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 09:05:49,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:05:49,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640307004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:05:49,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:05:49,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:05:49,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748429823] [2023-08-04 09:05:49,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:05:49,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:05:49,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:05:49,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:05:49,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:05:49,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 625 [2023-08-04 09:05:49,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 57 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:49,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:05:49,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 625 [2023-08-04 09:05:49,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:05:49,789 INFO L124 PetriNetUnfolderBase]: 2762/3980 cut-off events. [2023-08-04 09:05:49,789 INFO L125 PetriNetUnfolderBase]: For 593/593 co-relation queries the response was YES. [2023-08-04 09:05:49,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8607 conditions, 3980 events. 2762/3980 cut-off events. For 593/593 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 15430 event pairs, 1644 based on Foata normal form. 0/3088 useless extension candidates. Maximal degree in co-relation 4011. Up to 3360 conditions per place. [2023-08-04 09:05:49,804 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 73 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 09:05:49,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 78 transitions, 358 flow [2023-08-04 09:05:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:05:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:05:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 876 transitions. [2023-08-04 09:05:49,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672 [2023-08-04 09:05:49,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 876 transitions. [2023-08-04 09:05:49,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 876 transitions. [2023-08-04 09:05:49,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:05:49,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 876 transitions. [2023-08-04 09:05:49,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:49,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:49,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:49,814 INFO L175 Difference]: Start difference. First operand has 49 places, 57 transitions, 160 flow. Second operand 3 states and 876 transitions. [2023-08-04 09:05:49,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 78 transitions, 358 flow [2023-08-04 09:05:49,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:05:49,818 INFO L231 Difference]: Finished difference. Result has 51 places, 58 transitions, 170 flow [2023-08-04 09:05:49,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=58} [2023-08-04 09:05:49,819 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-04 09:05:49,819 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 58 transitions, 170 flow [2023-08-04 09:05:49,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:49,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:05:49,820 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] [2023-08-04 09:05:49,826 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 09:05:50,026 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 09:05:50,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:05:50,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:05:50,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1792299217, now seen corresponding path program 1 times [2023-08-04 09:05:50,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:05:50,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248761849] [2023-08-04 09:05:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:50,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:05:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:50,098 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 09:05:50,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:05:50,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248761849] [2023-08-04 09:05:50,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248761849] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:05:50,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665903570] [2023-08-04 09:05:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:50,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:05:50,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:05:50,100 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 09:05:50,106 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 09:05:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:50,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:05:50,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:05:50,237 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 09:05:50,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:05:50,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665903570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:05:50,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:05:50,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:05:50,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272922897] [2023-08-04 09:05:50,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:05:50,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:05:50,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:05:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:05:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:05:50,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 625 [2023-08-04 09:05:50,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 58 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:50,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:05:50,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 625 [2023-08-04 09:05:50,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:05:50,566 INFO L124 PetriNetUnfolderBase]: 2745/3951 cut-off events. [2023-08-04 09:05:50,567 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-08-04 09:05:50,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8611 conditions, 3951 events. 2745/3951 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 15289 event pairs, 1845 based on Foata normal form. 0/3093 useless extension candidates. Maximal degree in co-relation 7024. Up to 3791 conditions per place. [2023-08-04 09:05:50,583 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 67 selfloop transitions, 2 changer transitions 3/75 dead transitions. [2023-08-04 09:05:50,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 348 flow [2023-08-04 09:05:50,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:05:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:05:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2023-08-04 09:05:50,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650666666666667 [2023-08-04 09:05:50,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2023-08-04 09:05:50,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2023-08-04 09:05:50,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:05:50,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2023-08-04 09:05:50,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:50,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:50,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 625.0) internal successors, (2500), 4 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:50,593 INFO L175 Difference]: Start difference. First operand has 51 places, 58 transitions, 170 flow. Second operand 3 states and 872 transitions. [2023-08-04 09:05:50,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 348 flow [2023-08-04 09:05:50,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:05:50,604 INFO L231 Difference]: Finished difference. Result has 53 places, 56 transitions, 168 flow [2023-08-04 09:05:50,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=53, PETRI_TRANSITIONS=56} [2023-08-04 09:05:50,604 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-04 09:05:50,604 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 56 transitions, 168 flow [2023-08-04 09:05:50,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:50,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:05:50,605 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] [2023-08-04 09:05:50,614 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 09:05:50,811 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 09:05:50,811 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:05:50,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:05:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1200235298, now seen corresponding path program 1 times [2023-08-04 09:05:50,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:05:50,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865011577] [2023-08-04 09:05:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:50,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:05:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:50,897 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 09:05:50,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:05:50,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865011577] [2023-08-04 09:05:50,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865011577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:05:50,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119029790] [2023-08-04 09:05:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:50,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:05:50,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:05:50,899 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 09:05:50,902 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 09:05:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:51,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:05:51,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:05:51,095 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 09:05:51,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:05:51,112 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 09:05:51,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119029790] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:05:51,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:05:51,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:05:51,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697102020] [2023-08-04 09:05:51,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:05:51,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:05:51,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:05:51,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:05:51,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:05:51,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 625 [2023-08-04 09:05:51,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 56 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 274.2) internal successors, (1371), 5 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:51,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:05:51,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 625 [2023-08-04 09:05:51,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:05:51,178 INFO L124 PetriNetUnfolderBase]: 22/45 cut-off events. [2023-08-04 09:05:51,179 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:05:51,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 45 events. 22/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 0 based on Foata normal form. 6/40 useless extension candidates. Maximal degree in co-relation 97. Up to 28 conditions per place. [2023-08-04 09:05:51,179 INFO L140 encePairwiseOnDemand]: 622/625 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2023-08-04 09:05:51,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 112 flow [2023-08-04 09:05:51,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:05:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:05:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1092 transitions. [2023-08-04 09:05:51,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368 [2023-08-04 09:05:51,182 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1092 transitions. [2023-08-04 09:05:51,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1092 transitions. [2023-08-04 09:05:51,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:05:51,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1092 transitions. [2023-08-04 09:05:51,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:51,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 625.0) internal successors, (3125), 5 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:51,189 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 625.0) internal successors, (3125), 5 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:51,189 INFO L175 Difference]: Start difference. First operand has 53 places, 56 transitions, 168 flow. Second operand 4 states and 1092 transitions. [2023-08-04 09:05:51,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 112 flow [2023-08-04 09:05:51,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:05:51,190 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 09:05:51,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=625, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2023-08-04 09:05:51,190 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -25 predicate places. [2023-08-04 09:05:51,191 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 09:05:51,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 274.2) internal successors, (1371), 5 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:51,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:05:51,201 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 09:05:51,401 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 09:05:51,401 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:05:51,403 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:05:51,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:51,482 INFO L124 PetriNetUnfolderBase]: 118/790 cut-off events. [2023-08-04 09:05:51,483 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:05:51,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 790 events. 118/790 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3486 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 495. Up to 16 conditions per place. [2023-08-04 09:05:51,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:51,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:51,489 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:05:51,489 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:51,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:51,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 314 transitions, 670 flow [2023-08-04 09:05:51,556 INFO L124 PetriNetUnfolderBase]: 118/790 cut-off events. [2023-08-04 09:05:51,556 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:05:51,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 790 events. 118/790 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3486 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 495. Up to 16 conditions per place. [2023-08-04 09:05:51,571 INFO L119 LiptonReduction]: Number of co-enabled transitions 9628 [2023-08-04 09:06:00,171 INFO L134 LiptonReduction]: Checked pairs total: 18523 [2023-08-04 09:06:00,172 INFO L136 LiptonReduction]: Total number of compositions: 313 [2023-08-04 09:06:00,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:06:00,173 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;@6b63afb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:06:00,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:06:00,177 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:06:00,177 INFO L124 PetriNetUnfolderBase]: 8/43 cut-off events. [2023-08-04 09:06:00,178 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:06:00,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:00,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:00,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:06:00,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:00,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1481373307, now seen corresponding path program 1 times [2023-08-04 09:06:00,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:00,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323344645] [2023-08-04 09:06:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:00,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:06:00,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:06:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:06:00,254 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:06:00,254 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:06:00,254 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:06:00,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:06:00,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:06:00,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:06:00,255 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:06:00,255 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:06:00,256 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:06:00,256 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:06:00,341 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:06:00,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 329 places, 376 transitions, 842 flow [2023-08-04 09:06:00,906 INFO L124 PetriNetUnfolderBase]: 929/4331 cut-off events. [2023-08-04 09:06:00,907 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:06:00,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5005 conditions, 4331 events. 929/4331 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 34073 event pairs, 11 based on Foata normal form. 0/3646 useless extension candidates. Maximal degree in co-relation 2613. Up to 192 conditions per place. [2023-08-04 09:06:00,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 329 places, 376 transitions, 842 flow [2023-08-04 09:06:00,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 329 places, 376 transitions, 842 flow [2023-08-04 09:06:00,982 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:06:00,983 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 329 places, 376 transitions, 842 flow [2023-08-04 09:06:00,983 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 329 places, 376 transitions, 842 flow [2023-08-04 09:06:00,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 329 places, 376 transitions, 842 flow [2023-08-04 09:06:01,521 INFO L124 PetriNetUnfolderBase]: 929/4331 cut-off events. [2023-08-04 09:06:01,521 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:06:01,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5005 conditions, 4331 events. 929/4331 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 34073 event pairs, 11 based on Foata normal form. 0/3646 useless extension candidates. Maximal degree in co-relation 2613. Up to 192 conditions per place. [2023-08-04 09:06:01,780 INFO L119 LiptonReduction]: Number of co-enabled transitions 26412 [2023-08-04 09:06:10,477 INFO L134 LiptonReduction]: Checked pairs total: 67448 [2023-08-04 09:06:10,477 INFO L136 LiptonReduction]: Total number of compositions: 351 [2023-08-04 09:06:10,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:06:10,479 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;@6b63afb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:06:10,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:06:10,483 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:06:10,483 INFO L124 PetriNetUnfolderBase]: 6/39 cut-off events. [2023-08-04 09:06:10,483 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:06:10,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:10,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:10,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:10,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1104752605, now seen corresponding path program 1 times [2023-08-04 09:06:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:10,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083999365] [2023-08-04 09:06:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:10,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:10,518 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 09:06:10,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:10,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083999365] [2023-08-04 09:06:10,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083999365] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:10,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:06:10,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:06:10,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517194778] [2023-08-04 09:06:10,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:10,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:10,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:10,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:10,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:06:10,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 727 [2023-08-04 09:06:10,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 96 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:10,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:10,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 727 [2023-08-04 09:06:10,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand