/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-ring.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:05:53,187 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:05:53,264 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:05:53,271 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:05:53,271 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:05:53,272 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:05:53,272 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:05:53,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:05:53,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:05:53,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:05:53,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:05:53,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:05:53,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:05:53,313 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:05:53,313 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:05:53,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:05:53,313 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:05:53,314 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:05:53,314 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:05:53,314 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:05:53,314 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:05:53,315 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:05:53,315 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:05:53,315 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:05:53,315 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:05:53,315 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:05:53,316 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:05:53,316 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:05:53,316 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:05:53,317 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:05:53,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:05:53,318 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:05:53,318 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:05:53,318 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:05:53,318 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:05:53,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:05:53,318 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:05:53,318 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:05:53,319 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:05:53,319 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:05:53,319 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:05:53,319 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:05:53,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:05:53,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:05:53,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:05:53,566 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:05:53,568 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:05:53,569 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-ring.wvr_bound2.c [2023-08-04 09:05:54,745 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:05:54,902 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:05:54,902 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-ring.wvr_bound2.c [2023-08-04 09:05:54,910 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96494e74b/0973d7016e874ba8b7780690f8fbe547/FLAG7cc20bcfa [2023-08-04 09:05:54,923 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96494e74b/0973d7016e874ba8b7780690f8fbe547 [2023-08-04 09:05:54,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:05:54,927 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:05:54,928 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:05:54,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:05:54,935 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:05:54,936 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:05:54" (1/1) ... [2023-08-04 09:05:54,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@226bebf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:54, skipping insertion in model container [2023-08-04 09:05:54,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:05:54" (1/1) ... [2023-08-04 09:05:54,974 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:05:55,118 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-ring.wvr_bound2.c[4190,4203] [2023-08-04 09:05:55,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:05:55,132 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:05:55,157 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-ring.wvr_bound2.c[4190,4203] [2023-08-04 09:05:55,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:05:55,168 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:05:55,168 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:05:55,175 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:05:55,175 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55 WrapperNode [2023-08-04 09:05:55,175 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:05:55,176 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:05:55,177 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:05:55,177 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:05:55,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (1/1) ... [2023-08-04 09:05:55,192 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (1/1) ... [2023-08-04 09:05:55,224 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 373 [2023-08-04 09:05:55,224 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:05:55,225 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:05:55,225 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:05:55,225 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:05:55,234 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (1/1) ... [2023-08-04 09:05:55,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (1/1) ... [2023-08-04 09:05:55,240 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (1/1) ... [2023-08-04 09:05:55,240 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (1/1) ... [2023-08-04 09:05:55,258 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (1/1) ... [2023-08-04 09:05:55,263 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (1/1) ... [2023-08-04 09:05:55,266 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (1/1) ... [2023-08-04 09:05:55,267 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (1/1) ... [2023-08-04 09:05:55,271 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:05:55,272 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:05:55,272 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:05:55,272 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:05:55,273 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (1/1) ... [2023-08-04 09:05:55,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:05:55,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:05:55,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 09:05:55,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 09:05:55,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:05:55,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:05:55,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:05:55,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:05:55,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:05:55,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:05:55,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:05:55,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:05:55,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:05:55,359 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:05:55,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:05:55,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:05:55,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:05:55,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:05:55,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:05:55,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:05:55,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:05:55,362 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:05:55,494 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:05:55,496 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:05:55,917 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:05:56,091 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:05:56,091 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:05:56,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:05:56 BoogieIcfgContainer [2023-08-04 09:05:56,095 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:05:56,097 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:05:56,097 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:05:56,100 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:05:56,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:05:54" (1/3) ... [2023-08-04 09:05:56,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18448c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:05:56, skipping insertion in model container [2023-08-04 09:05:56,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:05:55" (2/3) ... [2023-08-04 09:05:56,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18448c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:05:56, skipping insertion in model container [2023-08-04 09:05:56,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:05:56" (3/3) ... [2023-08-04 09:05:56,104 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-ring.wvr_bound2.c [2023-08-04 09:05:56,111 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:05:56,120 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:05:56,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:05:56,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:05:56,211 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:05:56,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 303 transitions, 648 flow [2023-08-04 09:05:56,503 INFO L124 PetriNetUnfolderBase]: 115/779 cut-off events. [2023-08-04 09:05:56,503 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:05:56,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 779 events. 115/779 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3447 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 484. Up to 16 conditions per place. [2023-08-04 09:05:56,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 303 transitions, 648 flow [2023-08-04 09:05:56,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 303 transitions, 648 flow [2023-08-04 09:05:56,533 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:05:56,547 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 303 transitions, 648 flow [2023-08-04 09:05:56,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 303 transitions, 648 flow [2023-08-04 09:05:56,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 303 transitions, 648 flow [2023-08-04 09:05:56,696 INFO L124 PetriNetUnfolderBase]: 115/779 cut-off events. [2023-08-04 09:05:56,696 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:05:56,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 779 events. 115/779 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3447 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 484. Up to 16 conditions per place. [2023-08-04 09:05:56,713 INFO L119 LiptonReduction]: Number of co-enabled transitions 7098 [2023-08-04 09:06:05,635 INFO L134 LiptonReduction]: Checked pairs total: 14101 [2023-08-04 09:06:05,636 INFO L136 LiptonReduction]: Total number of compositions: 295 [2023-08-04 09:06:05,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:06:05,653 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;@60cf1ebf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:06:05,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:06:05,661 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:06:05,661 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2023-08-04 09:06:05,661 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:06:05,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:05,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:05,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:05,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:05,667 INFO L85 PathProgramCache]: Analyzing trace with hash 686152902, now seen corresponding path program 1 times [2023-08-04 09:06:05,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:05,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810515681] [2023-08-04 09:06:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:05,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:06:06,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:06,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810515681] [2023-08-04 09:06:06,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810515681] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:06,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:06:06,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:06:06,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334806972] [2023-08-04 09:06:06,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:06,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:06,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:06,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:06:06,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 598 [2023-08-04 09:06:06,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 59 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:06,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:06,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 598 [2023-08-04 09:06:06,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:06,715 INFO L124 PetriNetUnfolderBase]: 4144/6099 cut-off events. [2023-08-04 09:06:06,715 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2023-08-04 09:06:06,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12315 conditions, 6099 events. 4144/6099 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 29504 event pairs, 1830 based on Foata normal form. 0/4557 useless extension candidates. Maximal degree in co-relation 10645. Up to 5837 conditions per place. [2023-08-04 09:06:06,748 INFO L140 encePairwiseOnDemand]: 592/598 looper letters, 53 selfloop transitions, 2 changer transitions 4/62 dead transitions. [2023-08-04 09:06:06,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 278 flow [2023-08-04 09:06:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 831 transitions. [2023-08-04 09:06:06,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46321070234113715 [2023-08-04 09:06:06,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 831 transitions. [2023-08-04 09:06:06,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 831 transitions. [2023-08-04 09:06:06,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:06,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 831 transitions. [2023-08-04 09:06:06,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:06,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:06,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:06,795 INFO L175 Difference]: Start difference. First operand has 49 places, 59 transitions, 160 flow. Second operand 3 states and 831 transitions. [2023-08-04 09:06:06,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 278 flow [2023-08-04 09:06:06,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:06:06,804 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 150 flow [2023-08-04 09:06:06,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2023-08-04 09:06:06,811 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-04 09:06:06,811 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 150 flow [2023-08-04 09:06:06,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:06,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:06,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:06,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:06:06,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:06,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1665114407, now seen corresponding path program 1 times [2023-08-04 09:06:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:06,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106971585] [2023-08-04 09:06:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:06,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:06:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:06,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106971585] [2023-08-04 09:06:06,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106971585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:06,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601692180] [2023-08-04 09:06:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:06,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:06,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:06,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:06,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:06:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:07,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:06:07,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:06:07,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:06:07,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601692180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:07,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:06:07,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:06:07,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590040964] [2023-08-04 09:06:07,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:07,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:07,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:07,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 598 [2023-08-04 09:06:07,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:07,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:07,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 598 [2023-08-04 09:06:07,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:07,614 INFO L124 PetriNetUnfolderBase]: 4004/5840 cut-off events. [2023-08-04 09:06:07,614 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2023-08-04 09:06:07,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11804 conditions, 5840 events. 4004/5840 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 27443 event pairs, 1917 based on Foata normal form. 0/4364 useless extension candidates. Maximal degree in co-relation 10140. Up to 5570 conditions per place. [2023-08-04 09:06:07,652 INFO L140 encePairwiseOnDemand]: 595/598 looper letters, 57 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2023-08-04 09:06:07,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 290 flow [2023-08-04 09:06:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 832 transitions. [2023-08-04 09:06:07,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2023-08-04 09:06:07,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 832 transitions. [2023-08-04 09:06:07,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 832 transitions. [2023-08-04 09:06:07,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:07,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 832 transitions. [2023-08-04 09:06:07,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:07,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:07,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:07,714 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 150 flow. Second operand 3 states and 832 transitions. [2023-08-04 09:06:07,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 290 flow [2023-08-04 09:06:07,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 274 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:06:07,725 INFO L231 Difference]: Finished difference. Result has 46 places, 53 transitions, 142 flow [2023-08-04 09:06:07,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=53} [2023-08-04 09:06:07,726 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-08-04 09:06:07,726 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 53 transitions, 142 flow [2023-08-04 09:06:07,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:07,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:07,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:07,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:06:07,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:07,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:07,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash 532917226, now seen corresponding path program 1 times [2023-08-04 09:06:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:07,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767779754] [2023-08-04 09:06:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:07,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:06:08,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:08,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767779754] [2023-08-04 09:06:08,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767779754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:08,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349595932] [2023-08-04 09:06:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:08,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:08,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:08,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:08,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:06:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:08,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:06:08,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:06:08,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:06:08,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349595932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:08,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:06:08,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:06:08,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329535438] [2023-08-04 09:06:08,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:08,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:08,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:08,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:08,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:08,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 598 [2023-08-04 09:06:08,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 53 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:08,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:08,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 598 [2023-08-04 09:06:08,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:08,652 INFO L124 PetriNetUnfolderBase]: 3984/5824 cut-off events. [2023-08-04 09:06:08,652 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-04 09:06:08,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11802 conditions, 5824 events. 3984/5824 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 26601 event pairs, 1885 based on Foata normal form. 0/4392 useless extension candidates. Maximal degree in co-relation 4024. Up to 5235 conditions per place. [2023-08-04 09:06:08,690 INFO L140 encePairwiseOnDemand]: 595/598 looper letters, 61 selfloop transitions, 2 changer transitions 1/67 dead transitions. [2023-08-04 09:06:08,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 298 flow [2023-08-04 09:06:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2023-08-04 09:06:08,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659977703455964 [2023-08-04 09:06:08,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2023-08-04 09:06:08,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2023-08-04 09:06:08,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:08,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2023-08-04 09:06:08,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:08,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:08,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:08,701 INFO L175 Difference]: Start difference. First operand has 46 places, 53 transitions, 142 flow. Second operand 3 states and 836 transitions. [2023-08-04 09:06:08,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 298 flow [2023-08-04 09:06:08,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 67 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:06:08,705 INFO L231 Difference]: Finished difference. Result has 47 places, 53 transitions, 146 flow [2023-08-04 09:06:08,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=53} [2023-08-04 09:06:08,706 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-04 09:06:08,706 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 53 transitions, 146 flow [2023-08-04 09:06:08,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:08,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:08,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:08,715 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 09:06:08,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:06:08,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:08,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:08,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1844223372, now seen corresponding path program 1 times [2023-08-04 09:06:08,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:08,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169796589] [2023-08-04 09:06:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:08,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:06:09,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:09,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169796589] [2023-08-04 09:06:09,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169796589] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:09,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284197001] [2023-08-04 09:06:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:09,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:09,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:09,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:09,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:06:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:09,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:06:09,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:06:09,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:06:09,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284197001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:09,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:06:09,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:06:09,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564768938] [2023-08-04 09:06:09,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:09,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:09,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:09,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:09,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 598 [2023-08-04 09:06:09,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 53 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:09,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:09,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 598 [2023-08-04 09:06:09,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:09,516 INFO L124 PetriNetUnfolderBase]: 2448/3664 cut-off events. [2023-08-04 09:06:09,516 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2023-08-04 09:06:09,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7718 conditions, 3664 events. 2448/3664 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 15305 event pairs, 1351 based on Foata normal form. 0/2884 useless extension candidates. Maximal degree in co-relation 2520. Up to 2759 conditions per place. [2023-08-04 09:06:09,534 INFO L140 encePairwiseOnDemand]: 595/598 looper letters, 66 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-04 09:06:09,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 71 transitions, 324 flow [2023-08-04 09:06:09,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:09,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 840 transitions. [2023-08-04 09:06:09,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682274247491639 [2023-08-04 09:06:09,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 840 transitions. [2023-08-04 09:06:09,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 840 transitions. [2023-08-04 09:06:09,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:09,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 840 transitions. [2023-08-04 09:06:09,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:09,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:09,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:09,544 INFO L175 Difference]: Start difference. First operand has 47 places, 53 transitions, 146 flow. Second operand 3 states and 840 transitions. [2023-08-04 09:06:09,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 71 transitions, 324 flow [2023-08-04 09:06:09,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:06:09,546 INFO L231 Difference]: Finished difference. Result has 48 places, 54 transitions, 154 flow [2023-08-04 09:06:09,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=48, PETRI_TRANSITIONS=54} [2023-08-04 09:06:09,547 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-08-04 09:06:09,547 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 54 transitions, 154 flow [2023-08-04 09:06:09,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:09,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:09,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:09,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:06:09,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:09,756 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:09,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:09,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1705306671, now seen corresponding path program 1 times [2023-08-04 09:06:09,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:09,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983537229] [2023-08-04 09:06:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:09,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:06:09,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983537229] [2023-08-04 09:06:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983537229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183124103] [2023-08-04 09:06:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:09,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:09,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:09,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:09,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:06:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:09,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:06:09,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:06:09,961 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:06:09,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183124103] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:09,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:06:09,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:06:09,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486236690] [2023-08-04 09:06:09,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:09,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:09,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:09,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:09,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 598 [2023-08-04 09:06:09,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 54 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:09,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:09,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 598 [2023-08-04 09:06:09,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:10,290 INFO L124 PetriNetUnfolderBase]: 2088/3140 cut-off events. [2023-08-04 09:06:10,291 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2023-08-04 09:06:10,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6836 conditions, 3140 events. 2088/3140 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 12575 event pairs, 1369 based on Foata normal form. 0/2617 useless extension candidates. Maximal degree in co-relation 2634. Up to 2623 conditions per place. [2023-08-04 09:06:10,307 INFO L140 encePairwiseOnDemand]: 595/598 looper letters, 67 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 09:06:10,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 72 transitions, 334 flow [2023-08-04 09:06:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 840 transitions. [2023-08-04 09:06:10,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682274247491639 [2023-08-04 09:06:10,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 840 transitions. [2023-08-04 09:06:10,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 840 transitions. [2023-08-04 09:06:10,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:10,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 840 transitions. [2023-08-04 09:06:10,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:10,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:10,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:10,317 INFO L175 Difference]: Start difference. First operand has 48 places, 54 transitions, 154 flow. Second operand 3 states and 840 transitions. [2023-08-04 09:06:10,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 72 transitions, 334 flow [2023-08-04 09:06:10,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 72 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:06:10,322 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 164 flow [2023-08-04 09:06:10,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2023-08-04 09:06:10,323 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-04 09:06:10,323 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 164 flow [2023-08-04 09:06:10,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:10,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:10,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:10,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:06:10,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:10,529 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:10,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:10,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1909890275, now seen corresponding path program 1 times [2023-08-04 09:06:10,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:10,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396478194] [2023-08-04 09:06:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:10,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:06:10,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:10,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396478194] [2023-08-04 09:06:10,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396478194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:10,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103996996] [2023-08-04 09:06:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:10,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:10,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:10,600 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:10,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:06:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:10,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:06:10,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:06:10,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:06:10,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103996996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:10,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:06:10,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:06:10,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194398339] [2023-08-04 09:06:10,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:10,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:10,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:10,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:10,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:10,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 598 [2023-08-04 09:06:10,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:10,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:10,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 598 [2023-08-04 09:06:10,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:11,130 INFO L124 PetriNetUnfolderBase]: 2074/3115 cut-off events. [2023-08-04 09:06:11,130 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2023-08-04 09:06:11,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6844 conditions, 3115 events. 2074/3115 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 12422 event pairs, 1542 based on Foata normal form. 0/2622 useless extension candidates. Maximal degree in co-relation 5499. Up to 2973 conditions per place. [2023-08-04 09:06:11,148 INFO L140 encePairwiseOnDemand]: 595/598 looper letters, 61 selfloop transitions, 2 changer transitions 3/69 dead transitions. [2023-08-04 09:06:11,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 324 flow [2023-08-04 09:06:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:06:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:06:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2023-08-04 09:06:11,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659977703455964 [2023-08-04 09:06:11,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2023-08-04 09:06:11,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2023-08-04 09:06:11,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:11,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2023-08-04 09:06:11,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:11,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:11,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:11,159 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 164 flow. Second operand 3 states and 836 transitions. [2023-08-04 09:06:11,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 324 flow [2023-08-04 09:06:11,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 69 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:06:11,168 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 162 flow [2023-08-04 09:06:11,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-04 09:06:11,170 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-04 09:06:11,170 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 162 flow [2023-08-04 09:06:11,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:11,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:11,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:11,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:06:11,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:11,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:11,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:11,378 INFO L85 PathProgramCache]: Analyzing trace with hash -123776849, now seen corresponding path program 1 times [2023-08-04 09:06:11,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:11,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165751109] [2023-08-04 09:06:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:11,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:06:11,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:11,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165751109] [2023-08-04 09:06:11,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165751109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:06:11,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679556035] [2023-08-04 09:06:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:11,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:11,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:06:11,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:06:11,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:06:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:11,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:06:11,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:06:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:06:11,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:06:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:06:11,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679556035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:06:11,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:06:11,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:06:11,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828581417] [2023-08-04 09:06:11,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:06:11,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:06:11,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:11,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:06:11,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:06:11,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 598 [2023-08-04 09:06:11,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 264.2) internal successors, (1321), 5 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:11,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:11,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 598 [2023-08-04 09:06:11,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:06:11,762 INFO L124 PetriNetUnfolderBase]: 14/34 cut-off events. [2023-08-04 09:06:11,762 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:06:11,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 34 events. 14/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 55 event pairs, 0 based on Foata normal form. 5/34 useless extension candidates. Maximal degree in co-relation 74. Up to 20 conditions per place. [2023-08-04 09:06:11,762 INFO L140 encePairwiseOnDemand]: 595/598 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-04 09:06:11,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 88 flow [2023-08-04 09:06:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:06:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:06:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1046 transitions. [2023-08-04 09:06:11,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43729096989966554 [2023-08-04 09:06:11,766 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1046 transitions. [2023-08-04 09:06:11,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1046 transitions. [2023-08-04 09:06:11,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:06:11,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1046 transitions. [2023-08-04 09:06:11,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 261.5) internal successors, (1046), 4 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:11,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 598.0) internal successors, (2990), 5 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:11,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 598.0) internal successors, (2990), 5 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:11,772 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 162 flow. Second operand 4 states and 1046 transitions. [2023-08-04 09:06:11,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 88 flow [2023-08-04 09:06:11,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:06:11,773 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2023-08-04 09:06:11,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2023-08-04 09:06:11,774 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -25 predicate places. [2023-08-04 09:06:11,774 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2023-08-04 09:06:11,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 264.2) internal successors, (1321), 5 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:11,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:06:11,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:06:11,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:06:11,984 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:11,985 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:06:11,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 303 transitions, 648 flow [2023-08-04 09:06:12,080 INFO L124 PetriNetUnfolderBase]: 115/779 cut-off events. [2023-08-04 09:06:12,080 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:06:12,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 779 events. 115/779 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3447 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 484. Up to 16 conditions per place. [2023-08-04 09:06:12,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 303 transitions, 648 flow [2023-08-04 09:06:12,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 303 transitions, 648 flow [2023-08-04 09:06:12,087 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:06:12,087 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 303 transitions, 648 flow [2023-08-04 09:06:12,087 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 303 transitions, 648 flow [2023-08-04 09:06:12,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 303 transitions, 648 flow [2023-08-04 09:06:12,157 INFO L124 PetriNetUnfolderBase]: 115/779 cut-off events. [2023-08-04 09:06:12,157 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:06:12,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 779 events. 115/779 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3447 event pairs, 0 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 484. Up to 16 conditions per place. [2023-08-04 09:06:12,170 INFO L119 LiptonReduction]: Number of co-enabled transitions 7098 [2023-08-04 09:06:20,869 INFO L134 LiptonReduction]: Checked pairs total: 14101 [2023-08-04 09:06:20,869 INFO L136 LiptonReduction]: Total number of compositions: 298 [2023-08-04 09:06:20,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:06:20,871 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;@60cf1ebf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:06:20,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:06:20,876 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:06:20,876 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-08-04 09:06:20,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:06:20,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:20,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:20,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:06:20,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:20,877 INFO L85 PathProgramCache]: Analyzing trace with hash -887709245, now seen corresponding path program 1 times [2023-08-04 09:06:20,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:20,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733467774] [2023-08-04 09:06:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:20,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:06:20,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:06:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:06:20,975 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:06:20,976 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:06:20,976 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:06:20,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:06:20,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:06:20,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:06:20,977 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:06:20,977 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:06:20,978 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:06:20,978 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:06:21,022 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:06:21,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 354 transitions, 798 flow [2023-08-04 09:06:21,683 INFO L124 PetriNetUnfolderBase]: 923/4309 cut-off events. [2023-08-04 09:06:21,684 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:06:21,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 4309 events. 923/4309 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 34174 event pairs, 22 based on Foata normal form. 0/3630 useless extension candidates. Maximal degree in co-relation 2602. Up to 192 conditions per place. [2023-08-04 09:06:21,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 313 places, 354 transitions, 798 flow [2023-08-04 09:06:21,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 313 places, 354 transitions, 798 flow [2023-08-04 09:06:21,747 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:06:21,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 313 places, 354 transitions, 798 flow [2023-08-04 09:06:21,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 313 places, 354 transitions, 798 flow [2023-08-04 09:06:21,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 354 transitions, 798 flow [2023-08-04 09:06:22,280 INFO L124 PetriNetUnfolderBase]: 923/4309 cut-off events. [2023-08-04 09:06:22,281 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:06:22,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 4309 events. 923/4309 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 34174 event pairs, 22 based on Foata normal form. 0/3630 useless extension candidates. Maximal degree in co-relation 2602. Up to 192 conditions per place. [2023-08-04 09:06:22,410 INFO L119 LiptonReduction]: Number of co-enabled transitions 18888 [2023-08-04 09:06:31,356 INFO L134 LiptonReduction]: Checked pairs total: 49544 [2023-08-04 09:06:31,356 INFO L136 LiptonReduction]: Total number of compositions: 326 [2023-08-04 09:06:31,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:06:31,360 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;@60cf1ebf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:06:31,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:06:31,364 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:06:31,365 INFO L124 PetriNetUnfolderBase]: 6/39 cut-off events. [2023-08-04 09:06:31,365 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:06:31,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:06:31,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:06:31,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:06:31,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:06:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1270417344, now seen corresponding path program 1 times [2023-08-04 09:06:31,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:06:31,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469960167] [2023-08-04 09:06:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:06:31,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:06:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:06:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:06:31,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:06:31,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469960167] [2023-08-04 09:06:31,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469960167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:06:31,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:06:31,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:06:31,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840470596] [2023-08-04 09:06:31,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:06:31,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:06:31,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:06:31,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:06:31,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:06:31,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 680 [2023-08-04 09:06:31,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 89 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:06:31,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:06:31,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 680 [2023-08-04 09:06:31,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:08:39,067 INFO L124 PetriNetUnfolderBase]: 1250534/1541482 cut-off events. [2023-08-04 09:08:39,068 INFO L125 PetriNetUnfolderBase]: For 155452/155452 co-relation queries the response was YES.