/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_parallel-misc-3-extended.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:49:54,326 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:49:54,370 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:49:54,374 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:49:54,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:49:54,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:49:54,375 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:49:54,395 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:49:54,395 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:49:54,395 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:49:54,396 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:49:54,396 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:49:54,397 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:49:54,397 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:49:54,397 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:49:54,398 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:49:54,398 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:49:54,398 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:49:54,399 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:49:54,399 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:49:54,399 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:49:54,400 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:49:54,400 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:49:54,400 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:49:54,401 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:49:54,401 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:49:54,401 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:49:54,402 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:49:54,402 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:49:54,402 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:49:54,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:49:54,403 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:49:54,403 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:49:54,403 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:49:54,404 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:49:54,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:49:54,404 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:49:54,405 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:49:54,405 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:49:54,405 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:49:54,405 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:49:54,406 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:49:54,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:49:54,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:49:54,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:49:54,627 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:49:54,628 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:49:54,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-3-extended.wvr_bound2.c [2023-08-04 08:49:55,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:49:55,961 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:49:55,961 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-3-extended.wvr_bound2.c [2023-08-04 08:49:55,968 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b43ad952d/af4fd6396c264a68aa7f568aa436a8b6/FLAGa0ac82c82 [2023-08-04 08:49:55,981 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b43ad952d/af4fd6396c264a68aa7f568aa436a8b6 [2023-08-04 08:49:55,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:49:55,985 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:49:55,987 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:49:55,987 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:49:55,991 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:49:55,992 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:49:55" (1/1) ... [2023-08-04 08:49:55,992 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c49d05b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:55, skipping insertion in model container [2023-08-04 08:49:55,993 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:49:55" (1/1) ... [2023-08-04 08:49:56,022 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:49:56,158 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_parallel-misc-3-extended.wvr_bound2.c[3099,3112] [2023-08-04 08:49:56,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:49:56,167 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:49:56,189 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_parallel-misc-3-extended.wvr_bound2.c[3099,3112] [2023-08-04 08:49:56,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:49:56,197 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:49:56,197 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:49:56,203 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:49:56,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56 WrapperNode [2023-08-04 08:49:56,203 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:49:56,204 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:49:56,205 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:49:56,205 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:49:56,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (1/1) ... [2023-08-04 08:49:56,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (1/1) ... [2023-08-04 08:49:56,235 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 119 [2023-08-04 08:49:56,236 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:49:56,236 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:49:56,236 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:49:56,237 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:49:56,244 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (1/1) ... [2023-08-04 08:49:56,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (1/1) ... [2023-08-04 08:49:56,247 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (1/1) ... [2023-08-04 08:49:56,247 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (1/1) ... [2023-08-04 08:49:56,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (1/1) ... [2023-08-04 08:49:56,257 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (1/1) ... [2023-08-04 08:49:56,259 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (1/1) ... [2023-08-04 08:49:56,260 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (1/1) ... [2023-08-04 08:49:56,262 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:49:56,263 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:49:56,263 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:49:56,263 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:49:56,264 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (1/1) ... [2023-08-04 08:49:56,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:49:56,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:49:56,290 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 08:49:56,296 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 08:49:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:49:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:49:56,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:49:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:49:56,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:49:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:49:56,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:49:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:49:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:49:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:49:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:49:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:49:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:49:56,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:49:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:49:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:49:56,323 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 08:49:56,399 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:49:56,401 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:49:56,771 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:49:56,790 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:49:56,790 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 08:49:56,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:49:56 BoogieIcfgContainer [2023-08-04 08:49:56,793 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:49:56,795 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:49:56,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:49:56,798 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:49:56,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:49:55" (1/3) ... [2023-08-04 08:49:56,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a3246d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:49:56, skipping insertion in model container [2023-08-04 08:49:56,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:49:56" (2/3) ... [2023-08-04 08:49:56,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a3246d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:49:56, skipping insertion in model container [2023-08-04 08:49:56,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:49:56" (3/3) ... [2023-08-04 08:49:56,800 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-misc-3-extended.wvr_bound2.c [2023-08-04 08:49:56,807 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:49:56,836 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:49:56,837 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:49:56,837 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:49:56,939 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:49:56,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 175 transitions, 392 flow [2023-08-04 08:49:57,151 INFO L124 PetriNetUnfolderBase]: 117/675 cut-off events. [2023-08-04 08:49:57,151 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:49:57,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 675 events. 117/675 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3560 event pairs, 0 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 354. Up to 16 conditions per place. [2023-08-04 08:49:57,172 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 175 transitions, 392 flow [2023-08-04 08:49:57,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 175 transitions, 392 flow [2023-08-04 08:49:57,184 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:49:57,192 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 175 transitions, 392 flow [2023-08-04 08:49:57,194 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 175 transitions, 392 flow [2023-08-04 08:49:57,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 175 transitions, 392 flow [2023-08-04 08:49:57,263 INFO L124 PetriNetUnfolderBase]: 117/675 cut-off events. [2023-08-04 08:49:57,264 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:49:57,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 675 events. 117/675 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3560 event pairs, 0 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 354. Up to 16 conditions per place. [2023-08-04 08:49:57,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 10260 [2023-08-04 08:50:01,156 INFO L134 LiptonReduction]: Checked pairs total: 13399 [2023-08-04 08:50:01,157 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-04 08:50:01,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:50:01,175 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;@556d8c98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:50:01,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:50:01,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:50:01,182 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2023-08-04 08:50:01,182 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:50:01,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:01,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:50:01,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:01,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:01,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1516576031, now seen corresponding path program 1 times [2023-08-04 08:50:01,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:01,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322712239] [2023-08-04 08:50:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:01,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:01,352 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 08:50:01,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:01,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322712239] [2023-08-04 08:50:01,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322712239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:50:01,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:50:01,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:50:01,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483025237] [2023-08-04 08:50:01,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:50:01,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:50:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:01,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:50:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:50:01,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 333 [2023-08-04 08:50:01,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 44 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:01,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:01,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 333 [2023-08-04 08:50:01,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:50:01,599 INFO L124 PetriNetUnfolderBase]: 681/1066 cut-off events. [2023-08-04 08:50:01,599 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-08-04 08:50:01,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2179 conditions, 1066 events. 681/1066 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3940 event pairs, 188 based on Foata normal form. 0/650 useless extension candidates. Maximal degree in co-relation 1598. Up to 995 conditions per place. [2023-08-04 08:50:01,605 INFO L140 encePairwiseOnDemand]: 329/333 looper letters, 37 selfloop transitions, 2 changer transitions 4/46 dead transitions. [2023-08-04 08:50:01,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 214 flow [2023-08-04 08:50:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:50:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:50:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-08-04 08:50:01,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4804804804804805 [2023-08-04 08:50:01,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-08-04 08:50:01,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-08-04 08:50:01,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:01,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-08-04 08:50:01,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:01,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:01,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:01,634 INFO L175 Difference]: Start difference. First operand has 39 places, 44 transitions, 130 flow. Second operand 3 states and 480 transitions. [2023-08-04 08:50:01,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 214 flow [2023-08-04 08:50:01,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:50:01,640 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 124 flow [2023-08-04 08:50:01,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-04 08:50:01,644 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-04 08:50:01,645 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 124 flow [2023-08-04 08:50:01,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:01,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:01,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:50:01,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:50:01,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:01,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:01,647 INFO L85 PathProgramCache]: Analyzing trace with hash 760423625, now seen corresponding path program 1 times [2023-08-04 08:50:01,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:01,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587059347] [2023-08-04 08:50:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:01,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:01,734 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 08:50:01,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:01,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587059347] [2023-08-04 08:50:01,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587059347] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:50:01,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428037457] [2023-08-04 08:50:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:01,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:01,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:50:01,741 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 08:50:01,772 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 08:50:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:01,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:50:01,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:50:01,857 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 08:50:01,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:50:01,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428037457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:50:01,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:50:01,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:50:01,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763261430] [2023-08-04 08:50:01,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:50:01,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:50:01,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:50:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:50:01,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 333 [2023-08-04 08:50:01,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:01,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:01,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 333 [2023-08-04 08:50:01,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:50:02,047 INFO L124 PetriNetUnfolderBase]: 649/1008 cut-off events. [2023-08-04 08:50:02,047 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-04 08:50:02,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2068 conditions, 1008 events. 649/1008 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3536 event pairs, 189 based on Foata normal form. 0/616 useless extension candidates. Maximal degree in co-relation 1488. Up to 934 conditions per place. [2023-08-04 08:50:02,053 INFO L140 encePairwiseOnDemand]: 330/333 looper letters, 39 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2023-08-04 08:50:02,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 218 flow [2023-08-04 08:50:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:50:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:50:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-04 08:50:02,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-04 08:50:02,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-04 08:50:02,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-04 08:50:02,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:02,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-04 08:50:02,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:02,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:02,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:02,070 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 124 flow. Second operand 3 states and 481 transitions. [2023-08-04 08:50:02,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 218 flow [2023-08-04 08:50:02,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 202 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:50:02,074 INFO L231 Difference]: Finished difference. Result has 36 places, 40 transitions, 116 flow [2023-08-04 08:50:02,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=36, PETRI_TRANSITIONS=40} [2023-08-04 08:50:02,076 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2023-08-04 08:50:02,076 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 40 transitions, 116 flow [2023-08-04 08:50:02,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:02,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:02,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:50:02,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 08:50:02,282 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 08:50:02,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:02,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash -886356358, now seen corresponding path program 1 times [2023-08-04 08:50:02,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:02,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249560951] [2023-08-04 08:50:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:02,393 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 08:50:02,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:02,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249560951] [2023-08-04 08:50:02,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249560951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:50:02,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385618901] [2023-08-04 08:50:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:02,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:02,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:50:02,401 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 08:50:02,401 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 08:50:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:02,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:50:02,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:50:02,472 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 08:50:02,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:50:02,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385618901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:50:02,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:50:02,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:50:02,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761375352] [2023-08-04 08:50:02,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:50:02,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:50:02,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:50:02,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:50:02,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 333 [2023-08-04 08:50:02,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 40 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:02,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:02,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 333 [2023-08-04 08:50:02,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:50:02,633 INFO L124 PetriNetUnfolderBase]: 645/1004 cut-off events. [2023-08-04 08:50:02,633 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-04 08:50:02,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2065 conditions, 1004 events. 645/1004 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3326 event pairs, 194 based on Foata normal form. 0/620 useless extension candidates. Maximal degree in co-relation 1088. Up to 896 conditions per place. [2023-08-04 08:50:02,638 INFO L140 encePairwiseOnDemand]: 330/333 looper letters, 41 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-04 08:50:02,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 218 flow [2023-08-04 08:50:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:50:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:50:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-04 08:50:02,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48348348348348347 [2023-08-04 08:50:02,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-04 08:50:02,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-04 08:50:02,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:02,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-04 08:50:02,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:02,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:02,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:02,645 INFO L175 Difference]: Start difference. First operand has 36 places, 40 transitions, 116 flow. Second operand 3 states and 483 transitions. [2023-08-04 08:50:02,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 218 flow [2023-08-04 08:50:02,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:50:02,647 INFO L231 Difference]: Finished difference. Result has 37 places, 40 transitions, 120 flow [2023-08-04 08:50:02,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=37, PETRI_TRANSITIONS=40} [2023-08-04 08:50:02,648 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-08-04 08:50:02,648 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 40 transitions, 120 flow [2023-08-04 08:50:02,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:02,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:02,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:50:02,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 08:50:02,853 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 08:50:02,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:02,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:02,854 INFO L85 PathProgramCache]: Analyzing trace with hash -772707308, now seen corresponding path program 1 times [2023-08-04 08:50:02,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:02,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618818872] [2023-08-04 08:50:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:02,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:02,927 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 08:50:02,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:02,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618818872] [2023-08-04 08:50:02,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618818872] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:50:02,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828434787] [2023-08-04 08:50:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:02,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:02,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:50:02,931 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 08:50:02,932 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 08:50:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:02,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:50:02,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:50:03,008 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 08:50:03,008 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:50:03,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828434787] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:50:03,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:50:03,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:50:03,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777445238] [2023-08-04 08:50:03,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:50:03,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:50:03,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:50:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:50:03,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 333 [2023-08-04 08:50:03,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 40 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:03,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:03,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 333 [2023-08-04 08:50:03,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:50:03,132 INFO L124 PetriNetUnfolderBase]: 453/724 cut-off events. [2023-08-04 08:50:03,133 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-08-04 08:50:03,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 724 events. 453/724 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2204 event pairs, 169 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 836. Up to 592 conditions per place. [2023-08-04 08:50:03,139 INFO L140 encePairwiseOnDemand]: 330/333 looper letters, 46 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 08:50:03,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 244 flow [2023-08-04 08:50:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:50:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:50:03,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-08-04 08:50:03,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4874874874874875 [2023-08-04 08:50:03,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-08-04 08:50:03,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-08-04 08:50:03,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:03,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-08-04 08:50:03,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:03,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:03,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:03,146 INFO L175 Difference]: Start difference. First operand has 37 places, 40 transitions, 120 flow. Second operand 3 states and 487 transitions. [2023-08-04 08:50:03,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 244 flow [2023-08-04 08:50:03,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 51 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:50:03,150 INFO L231 Difference]: Finished difference. Result has 38 places, 41 transitions, 128 flow [2023-08-04 08:50:03,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=38, PETRI_TRANSITIONS=41} [2023-08-04 08:50:03,152 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-08-04 08:50:03,152 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 41 transitions, 128 flow [2023-08-04 08:50:03,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:03,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:03,153 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] [2023-08-04 08:50:03,160 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 08:50:03,357 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 08:50:03,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:03,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:03,358 INFO L85 PathProgramCache]: Analyzing trace with hash 605340345, now seen corresponding path program 1 times [2023-08-04 08:50:03,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:03,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039094294] [2023-08-04 08:50:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:03,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:03,410 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 08:50:03,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:03,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039094294] [2023-08-04 08:50:03,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039094294] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:50:03,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971193597] [2023-08-04 08:50:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:03,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:03,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:50:03,412 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 08:50:03,415 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 08:50:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:03,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:50:03,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:50:03,486 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 08:50:03,487 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:50:03,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971193597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:50:03,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:50:03,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:50:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622582387] [2023-08-04 08:50:03,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:50:03,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:50:03,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:03,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:50:03,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:50:03,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 333 [2023-08-04 08:50:03,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 41 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:03,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:03,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 333 [2023-08-04 08:50:03,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:50:03,629 INFO L124 PetriNetUnfolderBase]: 371/610 cut-off events. [2023-08-04 08:50:03,629 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-04 08:50:03,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 610 events. 371/610 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1749 event pairs, 146 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 737. Up to 464 conditions per place. [2023-08-04 08:50:03,632 INFO L140 encePairwiseOnDemand]: 330/333 looper letters, 47 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 08:50:03,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 52 transitions, 254 flow [2023-08-04 08:50:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:50:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:50:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-08-04 08:50:03,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4874874874874875 [2023-08-04 08:50:03,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-08-04 08:50:03,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-08-04 08:50:03,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:03,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-08-04 08:50:03,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:03,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:03,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:03,637 INFO L175 Difference]: Start difference. First operand has 38 places, 41 transitions, 128 flow. Second operand 3 states and 487 transitions. [2023-08-04 08:50:03,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 52 transitions, 254 flow [2023-08-04 08:50:03,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:50:03,639 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 138 flow [2023-08-04 08:50:03,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2023-08-04 08:50:03,640 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-04 08:50:03,640 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 138 flow [2023-08-04 08:50:03,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:03,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:03,640 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] [2023-08-04 08:50:03,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 08:50:03,841 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 08:50:03,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:03,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:03,841 INFO L85 PathProgramCache]: Analyzing trace with hash 585190045, now seen corresponding path program 1 times [2023-08-04 08:50:03,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:03,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062837849] [2023-08-04 08:50:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:03,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:03,928 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 08:50:03,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:03,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062837849] [2023-08-04 08:50:03,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062837849] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:50:03,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495154945] [2023-08-04 08:50:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:03,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:03,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:50:03,929 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 08:50:03,933 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 08:50:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:04,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:50:04,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:50:04,021 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 08:50:04,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:50:04,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495154945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:50:04,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:50:04,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:50:04,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82013434] [2023-08-04 08:50:04,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:50:04,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:50:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:04,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:50:04,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:50:04,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 333 [2023-08-04 08:50:04,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:04,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 333 [2023-08-04 08:50:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:50:04,136 INFO L124 PetriNetUnfolderBase]: 364/599 cut-off events. [2023-08-04 08:50:04,136 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-08-04 08:50:04,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 599 events. 364/599 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1692 event pairs, 171 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 888. Up to 543 conditions per place. [2023-08-04 08:50:04,138 INFO L140 encePairwiseOnDemand]: 330/333 looper letters, 41 selfloop transitions, 2 changer transitions 3/49 dead transitions. [2023-08-04 08:50:04,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 244 flow [2023-08-04 08:50:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:50:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:50:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-04 08:50:04,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48348348348348347 [2023-08-04 08:50:04,140 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-04 08:50:04,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-04 08:50:04,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:04,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-04 08:50:04,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,144 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 138 flow. Second operand 3 states and 483 transitions. [2023-08-04 08:50:04,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 244 flow [2023-08-04 08:50:04,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:50:04,147 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 136 flow [2023-08-04 08:50:04,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-08-04 08:50:04,149 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-04 08:50:04,149 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 136 flow [2023-08-04 08:50:04,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:04,149 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] [2023-08-04 08:50:04,155 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 08:50:04,354 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 08:50:04,355 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:04,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:04,355 INFO L85 PathProgramCache]: Analyzing trace with hash -973233031, now seen corresponding path program 1 times [2023-08-04 08:50:04,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:04,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7048885] [2023-08-04 08:50:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:04,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:04,397 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 08:50:04,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:04,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7048885] [2023-08-04 08:50:04,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7048885] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:50:04,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062525841] [2023-08-04 08:50:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:04,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:04,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:50:04,399 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 08:50:04,422 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 08:50:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:04,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:50:04,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:50:04,511 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 08:50:04,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:50:04,533 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 08:50:04,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062525841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:50:04,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:50:04,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:50:04,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018053957] [2023-08-04 08:50:04,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:50:04,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:50:04,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:50:04,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:50:04,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 333 [2023-08-04 08:50:04,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:04,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 333 [2023-08-04 08:50:04,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:50:04,568 INFO L124 PetriNetUnfolderBase]: 5/13 cut-off events. [2023-08-04 08:50:04,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:50:04,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 13 events. 5/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 29. Up to 8 conditions per place. [2023-08-04 08:50:04,569 INFO L140 encePairwiseOnDemand]: 330/333 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-04 08:50:04,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 9 transitions, 40 flow [2023-08-04 08:50:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:50:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:50:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 590 transitions. [2023-08-04 08:50:04,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44294294294294295 [2023-08-04 08:50:04,571 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 590 transitions. [2023-08-04 08:50:04,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 590 transitions. [2023-08-04 08:50:04,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:04,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 590 transitions. [2023-08-04 08:50:04,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,575 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,575 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 136 flow. Second operand 4 states and 590 transitions. [2023-08-04 08:50:04,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 9 transitions, 40 flow [2023-08-04 08:50:04,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 9 transitions, 38 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:50:04,575 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 08:50:04,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 08:50:04,576 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -21 predicate places. [2023-08-04 08:50:04,576 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 08:50:04,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:04,579 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:50:04,587 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 08:50:04,784 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 08:50:04,785 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:50:04,787 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:50:04,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 175 transitions, 392 flow [2023-08-04 08:50:04,836 INFO L124 PetriNetUnfolderBase]: 117/675 cut-off events. [2023-08-04 08:50:04,836 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:50:04,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 675 events. 117/675 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3560 event pairs, 0 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 354. Up to 16 conditions per place. [2023-08-04 08:50:04,839 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 175 transitions, 392 flow [2023-08-04 08:50:04,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 175 transitions, 392 flow [2023-08-04 08:50:04,843 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:50:04,843 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 175 transitions, 392 flow [2023-08-04 08:50:04,843 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 175 transitions, 392 flow [2023-08-04 08:50:04,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 175 transitions, 392 flow [2023-08-04 08:50:04,886 INFO L124 PetriNetUnfolderBase]: 117/675 cut-off events. [2023-08-04 08:50:04,886 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:50:04,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 675 events. 117/675 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3560 event pairs, 0 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 354. Up to 16 conditions per place. [2023-08-04 08:50:04,902 INFO L119 LiptonReduction]: Number of co-enabled transitions 10260 [2023-08-04 08:50:08,490 INFO L134 LiptonReduction]: Checked pairs total: 13422 [2023-08-04 08:50:08,490 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-04 08:50:08,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:50:08,492 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;@556d8c98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:50:08,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:50:08,495 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:50:08,495 INFO L124 PetriNetUnfolderBase]: 3/29 cut-off events. [2023-08-04 08:50:08,495 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:50:08,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:08,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:50:08,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:50:08,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:08,496 INFO L85 PathProgramCache]: Analyzing trace with hash 34861854, now seen corresponding path program 1 times [2023-08-04 08:50:08,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:08,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806447906] [2023-08-04 08:50:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:08,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:50:08,515 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:50:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:50:08,534 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:50:08,534 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:50:08,534 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:50:08,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:50:08,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:50:08,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:50:08,535 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:50:08,536 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:50:08,536 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:50:08,536 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:50:08,557 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:50:08,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 241 transitions, 572 flow [2023-08-04 08:50:09,075 INFO L124 PetriNetUnfolderBase]: 964/4316 cut-off events. [2023-08-04 08:50:09,075 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:50:09,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 4316 events. 964/4316 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 34591 event pairs, 11 based on Foata normal form. 0/3596 useless extension candidates. Maximal degree in co-relation 2561. Up to 192 conditions per place. [2023-08-04 08:50:09,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 241 transitions, 572 flow [2023-08-04 08:50:09,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 241 transitions, 572 flow [2023-08-04 08:50:09,133 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:50:09,133 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 241 transitions, 572 flow [2023-08-04 08:50:09,133 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 241 transitions, 572 flow [2023-08-04 08:50:09,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 241 transitions, 572 flow [2023-08-04 08:50:09,612 INFO L124 PetriNetUnfolderBase]: 964/4316 cut-off events. [2023-08-04 08:50:09,612 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:50:09,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 4316 events. 964/4316 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 34591 event pairs, 11 based on Foata normal form. 0/3596 useless extension candidates. Maximal degree in co-relation 2561. Up to 192 conditions per place. [2023-08-04 08:50:09,791 INFO L119 LiptonReduction]: Number of co-enabled transitions 28620 [2023-08-04 08:50:12,388 INFO L134 LiptonReduction]: Checked pairs total: 117155 [2023-08-04 08:50:12,388 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-04 08:50:12,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:50:12,390 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;@556d8c98, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:50:12,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:50:12,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:50:12,393 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-08-04 08:50:12,393 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:50:12,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:12,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:50:12,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:12,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:12,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1342532107, now seen corresponding path program 1 times [2023-08-04 08:50:12,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:12,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856537550] [2023-08-04 08:50:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:12,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:12,429 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 08:50:12,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:12,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856537550] [2023-08-04 08:50:12,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856537550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:50:12,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:50:12,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:50:12,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802175543] [2023-08-04 08:50:12,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:50:12,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:50:12,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:12,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:50:12,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:50:12,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 08:50:12,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 113 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:12,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:12,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 08:50:12,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:50:48,554 INFO L124 PetriNetUnfolderBase]: 473551/566965 cut-off events. [2023-08-04 08:50:48,555 INFO L125 PetriNetUnfolderBase]: For 40126/40126 co-relation queries the response was YES. [2023-08-04 08:50:50,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143640 conditions, 566965 events. 473551/566965 cut-off events. For 40126/40126 co-relation queries the response was YES. Maximal size of possible extension queue 17331. Compared 3163355 event pairs, 180344 based on Foata normal form. 0/438532 useless extension candidates. Maximal degree in co-relation 311298. Up to 543301 conditions per place. [2023-08-04 08:50:53,354 INFO L140 encePairwiseOnDemand]: 391/395 looper letters, 77 selfloop transitions, 2 changer transitions 1/120 dead transitions. [2023-08-04 08:50:53,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 488 flow [2023-08-04 08:50:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:50:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:50:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2023-08-04 08:50:53,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5620253164556962 [2023-08-04 08:50:53,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2023-08-04 08:50:53,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2023-08-04 08:50:53,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:50:53,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2023-08-04 08:50:53,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:53,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:53,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:53,362 INFO L175 Difference]: Start difference. First operand has 90 places, 113 transitions, 316 flow. Second operand 3 states and 666 transitions. [2023-08-04 08:50:53,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 488 flow [2023-08-04 08:50:53,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 120 transitions, 488 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:50:53,399 INFO L231 Difference]: Finished difference. Result has 92 places, 112 transitions, 320 flow [2023-08-04 08:50:53,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=92, PETRI_TRANSITIONS=112} [2023-08-04 08:50:53,400 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-08-04 08:50:53,400 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 112 transitions, 320 flow [2023-08-04 08:50:53,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:53,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:50:53,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:50:53,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:50:53,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:50:53,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:50:53,401 INFO L85 PathProgramCache]: Analyzing trace with hash 31683606, now seen corresponding path program 1 times [2023-08-04 08:50:53,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:50:53,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952635142] [2023-08-04 08:50:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:53,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:50:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:53,441 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 08:50:53,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:50:53,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952635142] [2023-08-04 08:50:53,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952635142] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:50:53,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579294394] [2023-08-04 08:50:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:50:53,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:50:53,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:50:53,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:50:53,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:50:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:50:53,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:50:53,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:50:53,512 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 08:50:53,513 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:50:53,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579294394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:50:53,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:50:53,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:50:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654973145] [2023-08-04 08:50:53,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:50:53,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:50:53,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:50:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:50:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:50:53,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 08:50:53,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 112 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:50:53,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:50:53,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 08:50:53,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:51:28,281 INFO L124 PetriNetUnfolderBase]: 469703/561454 cut-off events. [2023-08-04 08:51:28,295 INFO L125 PetriNetUnfolderBase]: For 39663/39663 co-relation queries the response was YES. [2023-08-04 08:51:31,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133100 conditions, 561454 events. 469703/561454 cut-off events. For 39663/39663 co-relation queries the response was YES. Maximal size of possible extension queue 17937. Compared 3108809 event pairs, 186221 based on Foata normal form. 0/434443 useless extension candidates. Maximal degree in co-relation 658839. Up to 538308 conditions per place. [2023-08-04 08:51:35,031 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 88 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-08-04 08:51:35,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 536 flow [2023-08-04 08:51:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:51:35,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:51:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 675 transitions. [2023-08-04 08:51:35,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569620253164557 [2023-08-04 08:51:35,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 675 transitions. [2023-08-04 08:51:35,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 675 transitions. [2023-08-04 08:51:35,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:51:35,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 675 transitions. [2023-08-04 08:51:35,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:35,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:35,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:35,069 INFO L175 Difference]: Start difference. First operand has 92 places, 112 transitions, 320 flow. Second operand 3 states and 675 transitions. [2023-08-04 08:51:35,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 536 flow [2023-08-04 08:51:35,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 530 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:51:35,119 INFO L231 Difference]: Finished difference. Result has 92 places, 113 transitions, 326 flow [2023-08-04 08:51:35,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=326, PETRI_PLACES=92, PETRI_TRANSITIONS=113} [2023-08-04 08:51:35,120 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-08-04 08:51:35,121 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 113 transitions, 326 flow [2023-08-04 08:51:35,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:35,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:51:35,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:51:35,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 08:51:35,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:51:35,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:51:35,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:51:35,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1096618179, now seen corresponding path program 1 times [2023-08-04 08:51:35,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:51:35,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9304898] [2023-08-04 08:51:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:51:35,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:51:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:51:35,377 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 08:51:35,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:51:35,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9304898] [2023-08-04 08:51:35,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9304898] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:51:35,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84664504] [2023-08-04 08:51:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:51:35,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:51:35,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:51:35,393 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:51:35,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:51:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:51:35,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:51:35,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:51:35,548 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 08:51:35,549 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:51:35,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84664504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:51:35,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:51:35,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:51:35,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734600560] [2023-08-04 08:51:35,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:51:35,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:51:35,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:51:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:51:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:51:35,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 08:51:35,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 113 transitions, 326 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:51:35,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:51:35,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 08:51:35,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:11,661 INFO L124 PetriNetUnfolderBase]: 469403/562234 cut-off events. [2023-08-04 08:52:11,661 INFO L125 PetriNetUnfolderBase]: For 29523/29523 co-relation queries the response was YES. [2023-08-04 08:52:14,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134193 conditions, 562234 events. 469403/562234 cut-off events. For 29523/29523 co-relation queries the response was YES. Maximal size of possible extension queue 18805. Compared 3187051 event pairs, 151288 based on Foata normal form. 0/437015 useless extension candidates. Maximal degree in co-relation 251622. Up to 530758 conditions per place. [2023-08-04 08:52:18,182 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 97 selfloop transitions, 2 changer transitions 0/139 dead transitions. [2023-08-04 08:52:18,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 139 transitions, 576 flow [2023-08-04 08:52:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:18,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2023-08-04 08:52:18,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5763713080168776 [2023-08-04 08:52:18,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2023-08-04 08:52:18,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2023-08-04 08:52:18,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:18,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2023-08-04 08:52:18,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:18,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:18,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:18,189 INFO L175 Difference]: Start difference. First operand has 92 places, 113 transitions, 326 flow. Second operand 3 states and 683 transitions. [2023-08-04 08:52:18,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 139 transitions, 576 flow [2023-08-04 08:52:18,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 574 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:18,229 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 336 flow [2023-08-04 08:52:18,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2023-08-04 08:52:18,230 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2023-08-04 08:52:18,230 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 336 flow [2023-08-04 08:52:18,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:18,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:18,230 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 08:52:18,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:52:18,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 08:52:18,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:18,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1714693240, now seen corresponding path program 1 times [2023-08-04 08:52:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:18,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739455692] [2023-08-04 08:52:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:18,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:18,519 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 08:52:18,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:18,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739455692] [2023-08-04 08:52:18,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739455692] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:18,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762770429] [2023-08-04 08:52:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:18,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:18,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:18,533 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:52:18,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:52:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:18,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:52:18,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:18,633 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 08:52:18,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:52:18,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762770429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:18,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:52:18,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:52:18,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254825689] [2023-08-04 08:52:18,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:18,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:18,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:18,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:18,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:18,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 08:52:18,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:18,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:18,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 08:52:18,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:52:49,869 INFO L124 PetriNetUnfolderBase]: 408891/492962 cut-off events. [2023-08-04 08:52:49,869 INFO L125 PetriNetUnfolderBase]: For 30473/30473 co-relation queries the response was YES. [2023-08-04 08:52:51,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1002322 conditions, 492962 events. 408891/492962 cut-off events. For 30473/30473 co-relation queries the response was YES. Maximal size of possible extension queue 16907. Compared 2806479 event pairs, 143462 based on Foata normal form. 0/388097 useless extension candidates. Maximal degree in co-relation 215716. Up to 392618 conditions per place. [2023-08-04 08:52:53,929 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 108 selfloop transitions, 2 changer transitions 0/150 dead transitions. [2023-08-04 08:52:53,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 150 transitions, 645 flow [2023-08-04 08:52:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:52:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:52:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 693 transitions. [2023-08-04 08:52:53,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5848101265822785 [2023-08-04 08:52:53,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 693 transitions. [2023-08-04 08:52:53,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 693 transitions. [2023-08-04 08:52:53,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:52:53,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 693 transitions. [2023-08-04 08:52:53,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:53,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:53,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:53,935 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 336 flow. Second operand 3 states and 693 transitions. [2023-08-04 08:52:53,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 150 transitions, 645 flow [2023-08-04 08:52:53,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 150 transitions, 643 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:52:53,961 INFO L231 Difference]: Finished difference. Result has 96 places, 115 transitions, 346 flow [2023-08-04 08:52:53,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=96, PETRI_TRANSITIONS=115} [2023-08-04 08:52:53,962 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2023-08-04 08:52:53,962 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 115 transitions, 346 flow [2023-08-04 08:52:53,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:53,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:52:53,963 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] [2023-08-04 08:52:53,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 08:52:54,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:54,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:52:54,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:52:54,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1291265500, now seen corresponding path program 1 times [2023-08-04 08:52:54,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:52:54,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606153433] [2023-08-04 08:52:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:54,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:52:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:54,222 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 08:52:54,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:52:54,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606153433] [2023-08-04 08:52:54,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606153433] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:52:54,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750715953] [2023-08-04 08:52:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:52:54,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:52:54,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:52:54,225 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:52:54,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:52:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:52:54,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:52:54,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:52:54,308 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 08:52:54,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:52:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750715953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:52:54,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:52:54,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:52:54,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729892523] [2023-08-04 08:52:54,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:52:54,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:52:54,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:52:54,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:52:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:52:54,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 08:52:54,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 115 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:52:54,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:52:54,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 08:52:54,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:53:26,359 INFO L124 PetriNetUnfolderBase]: 376687/457306 cut-off events. [2023-08-04 08:53:26,360 INFO L125 PetriNetUnfolderBase]: For 43163/43163 co-relation queries the response was YES. [2023-08-04 08:53:28,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949689 conditions, 457306 events. 376687/457306 cut-off events. For 43163/43163 co-relation queries the response was YES. Maximal size of possible extension queue 14436. Compared 2615661 event pairs, 144644 based on Foata normal form. 0/367445 useless extension candidates. Maximal degree in co-relation 202129. Up to 346176 conditions per place. [2023-08-04 08:53:30,105 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 109 selfloop transitions, 2 changer transitions 0/151 dead transitions. [2023-08-04 08:53:30,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 151 transitions, 657 flow [2023-08-04 08:53:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:53:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:53:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 693 transitions. [2023-08-04 08:53:30,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5848101265822785 [2023-08-04 08:53:30,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 693 transitions. [2023-08-04 08:53:30,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 693 transitions. [2023-08-04 08:53:30,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:53:30,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 693 transitions. [2023-08-04 08:53:30,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:53:30,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:53:30,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:53:30,112 INFO L175 Difference]: Start difference. First operand has 96 places, 115 transitions, 346 flow. Second operand 3 states and 693 transitions. [2023-08-04 08:53:30,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 151 transitions, 657 flow [2023-08-04 08:53:32,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 151 transitions, 655 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:53:32,285 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 356 flow [2023-08-04 08:53:32,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2023-08-04 08:53:32,286 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 8 predicate places. [2023-08-04 08:53:32,286 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 356 flow [2023-08-04 08:53:32,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:53:32,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:53:32,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:53:32,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:53:32,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:53:32,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:53:32,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:53:32,489 INFO L85 PathProgramCache]: Analyzing trace with hash -413421712, now seen corresponding path program 1 times [2023-08-04 08:53:32,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:53:32,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123416567] [2023-08-04 08:53:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:53:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:53:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:53:32,535 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 08:53:32,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:53:32,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123416567] [2023-08-04 08:53:32,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123416567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:53:32,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972692445] [2023-08-04 08:53:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:53:32,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:53:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:53:32,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:53:32,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:53:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:53:32,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:53:32,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:53:32,631 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 08:53:32,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:53:32,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972692445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:53:32,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:53:32,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:53:32,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356839544] [2023-08-04 08:53:32,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:53:32,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:53:32,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:53:32,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:53:32,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:53:32,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 08:53:32,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:53:32,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:53:32,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 08:53:32,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:54:03,469 INFO L124 PetriNetUnfolderBase]: 374062/455084 cut-off events. [2023-08-04 08:54:03,470 INFO L125 PetriNetUnfolderBase]: For 47765/47765 co-relation queries the response was YES. [2023-08-04 08:54:05,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955812 conditions, 455084 events. 374062/455084 cut-off events. For 47765/47765 co-relation queries the response was YES. Maximal size of possible extension queue 14019. Compared 2618125 event pairs, 165889 based on Foata normal form. 0/370310 useless extension candidates. Maximal degree in co-relation 548366. Up to 395265 conditions per place. [2023-08-04 08:54:07,470 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 110 selfloop transitions, 2 changer transitions 0/152 dead transitions. [2023-08-04 08:54:07,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 152 transitions, 669 flow [2023-08-04 08:54:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:54:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:54:07,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 693 transitions. [2023-08-04 08:54:07,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5848101265822785 [2023-08-04 08:54:07,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 693 transitions. [2023-08-04 08:54:07,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 693 transitions. [2023-08-04 08:54:07,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:54:07,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 693 transitions. [2023-08-04 08:54:07,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:07,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:07,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:07,476 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 356 flow. Second operand 3 states and 693 transitions. [2023-08-04 08:54:07,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 152 transitions, 669 flow [2023-08-04 08:54:21,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 152 transitions, 667 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:54:21,166 INFO L231 Difference]: Finished difference. Result has 100 places, 117 transitions, 366 flow [2023-08-04 08:54:21,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=366, PETRI_PLACES=100, PETRI_TRANSITIONS=117} [2023-08-04 08:54:21,167 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 10 predicate places. [2023-08-04 08:54:21,167 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 117 transitions, 366 flow [2023-08-04 08:54:21,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:21,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:54:21,167 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] [2023-08-04 08:54:21,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 08:54:21,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:54:21,373 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:54:21,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:54:21,373 INFO L85 PathProgramCache]: Analyzing trace with hash -397000277, now seen corresponding path program 1 times [2023-08-04 08:54:21,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:54:21,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331219780] [2023-08-04 08:54:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:54:21,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:54:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:54:21,438 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 08:54:21,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:54:21,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331219780] [2023-08-04 08:54:21,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331219780] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:54:21,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836749987] [2023-08-04 08:54:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:54:21,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:54:21,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:54:21,447 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:54:21,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:54:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:54:21,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:54:21,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:54:21,538 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 08:54:21,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:54:21,551 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 08:54:21,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836749987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:54:21,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:54:21,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:54:21,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64591749] [2023-08-04 08:54:21,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:54:21,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:54:21,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:54:21,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:54:21,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:54:21,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 395 [2023-08-04 08:54:21,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 117 transitions, 366 flow. Second operand has 5 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:21,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:54:21,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 395 [2023-08-04 08:54:21,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:54:48,364 INFO L124 PetriNetUnfolderBase]: 352234/427520 cut-off events. [2023-08-04 08:54:48,364 INFO L125 PetriNetUnfolderBase]: For 42986/42986 co-relation queries the response was YES. [2023-08-04 08:54:50,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901497 conditions, 427520 events. 352234/427520 cut-off events. For 42986/42986 co-relation queries the response was YES. Maximal size of possible extension queue 14213. Compared 2441064 event pairs, 127402 based on Foata normal form. 4/349631 useless extension candidates. Maximal degree in co-relation 779992. Up to 409094 conditions per place. [2023-08-04 08:54:51,908 INFO L140 encePairwiseOnDemand]: 391/395 looper letters, 93 selfloop transitions, 3 changer transitions 1/137 dead transitions. [2023-08-04 08:54:51,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 137 transitions, 600 flow [2023-08-04 08:54:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:54:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:54:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 869 transitions. [2023-08-04 08:54:51,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-04 08:54:51,911 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 869 transitions. [2023-08-04 08:54:51,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 869 transitions. [2023-08-04 08:54:51,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:54:51,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 869 transitions. [2023-08-04 08:54:51,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:51,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:51,916 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:54:51,916 INFO L175 Difference]: Start difference. First operand has 100 places, 117 transitions, 366 flow. Second operand 4 states and 869 transitions. [2023-08-04 08:54:51,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 137 transitions, 600 flow [2023-08-04 08:55:05,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 137 transitions, 598 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:55:05,988 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 378 flow [2023-08-04 08:55:05,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=378, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2023-08-04 08:55:05,989 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 14 predicate places. [2023-08-04 08:55:05,989 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 378 flow [2023-08-04 08:55:05,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:55:05,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:05,989 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:05,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 08:55:06,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 08:55:06,194 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:55:06,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash 239757934, now seen corresponding path program 1 times [2023-08-04 08:55:06,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:06,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995372957] [2023-08-04 08:55:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:06,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:55:06,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:55:06,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995372957] [2023-08-04 08:55:06,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995372957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:55:06,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508377129] [2023-08-04 08:55:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:06,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:06,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:55:06,256 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:55:06,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:55:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:06,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:55:06,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:55:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:55:06,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:55:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:55:06,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508377129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:55:06,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:55:06,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:55:06,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052509246] [2023-08-04 08:55:06,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:55:06,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:55:06,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:55:06,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:55:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:55:06,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 395 [2023-08-04 08:55:06,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 378 flow. Second operand has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:55:06,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:55:06,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 395 [2023-08-04 08:55:06,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand