/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-prod-cons.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:36:28,141 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:36:28,183 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:36:28,187 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:36:28,188 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:36:28,188 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:36:28,188 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:36:28,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:36:28,207 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:36:28,208 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:36:28,208 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:36:28,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:36:28,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:36:28,209 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:36:28,210 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:36:28,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:36:28,210 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:36:28,211 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:36:28,211 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:36:28,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:36:28,212 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:36:28,212 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:36:28,213 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:36:28,213 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:36:28,213 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:36:28,214 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:36:28,214 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:36:28,214 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:36:28,215 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:36:28,215 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:36:28,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:36:28,216 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:36:28,216 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:36:28,216 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:36:28,216 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:36:28,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:36:28,217 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:36:28,217 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:36:28,217 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:36:28,218 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:36:28,218 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:36:28,219 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:36:28,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:36:28,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:36:28,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:36:28,448 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:36:28,450 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:36:28,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons.wvr_bound2.c [2023-08-04 09:36:29,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:36:29,834 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:36:29,834 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons.wvr_bound2.c [2023-08-04 09:36:29,844 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33bcc2488/3445720609154b57a4d11fea6225afbc/FLAG981857b1a [2023-08-04 09:36:29,861 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33bcc2488/3445720609154b57a4d11fea6225afbc [2023-08-04 09:36:29,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:36:29,865 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:36:29,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:36:29,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:36:29,869 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:36:29,870 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:36:29" (1/1) ... [2023-08-04 09:36:29,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f8900a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:29, skipping insertion in model container [2023-08-04 09:36:29,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:36:29" (1/1) ... [2023-08-04 09:36:29,902 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:36:30,047 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-prod-cons.wvr_bound2.c[3299,3312] [2023-08-04 09:36:30,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:36:30,060 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:36:30,082 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-prod-cons.wvr_bound2.c[3299,3312] [2023-08-04 09:36:30,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:36:30,101 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:36:30,102 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:36:30,108 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:36:30,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30 WrapperNode [2023-08-04 09:36:30,108 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:36:30,109 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:36:30,109 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:36:30,110 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:36:30,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (1/1) ... [2023-08-04 09:36:30,125 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (1/1) ... [2023-08-04 09:36:30,147 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 218 [2023-08-04 09:36:30,148 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:36:30,149 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:36:30,149 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:36:30,149 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:36:30,157 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (1/1) ... [2023-08-04 09:36:30,157 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (1/1) ... [2023-08-04 09:36:30,160 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (1/1) ... [2023-08-04 09:36:30,160 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (1/1) ... [2023-08-04 09:36:30,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (1/1) ... [2023-08-04 09:36:30,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (1/1) ... [2023-08-04 09:36:30,173 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (1/1) ... [2023-08-04 09:36:30,175 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (1/1) ... [2023-08-04 09:36:30,177 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:36:30,178 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:36:30,178 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:36:30,178 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:36:30,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (1/1) ... [2023-08-04 09:36:30,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:36:30,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:30,228 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 09:36:30,247 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 09:36:30,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:36:30,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:36:30,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:36:30,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:36:30,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:36:30,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:36:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:36:30,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:36:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:36:30,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:36:30,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:36:30,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:36:30,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:36:30,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:36:30,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:36:30,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:36:30,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:36:30,281 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 09:36:30,407 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:36:30,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:36:30,761 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:36:30,823 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:36:30,823 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 09:36:30,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:36:30 BoogieIcfgContainer [2023-08-04 09:36:30,825 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:36:30,827 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:36:30,827 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:36:30,831 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:36:30,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:36:29" (1/3) ... [2023-08-04 09:36:30,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@163b03c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:36:30, skipping insertion in model container [2023-08-04 09:36:30,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:30" (2/3) ... [2023-08-04 09:36:30,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@163b03c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:36:30, skipping insertion in model container [2023-08-04 09:36:30,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:36:30" (3/3) ... [2023-08-04 09:36:30,834 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-prod-cons.wvr_bound2.c [2023-08-04 09:36:30,840 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:36:30,850 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:36:30,851 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:36:30,851 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:36:30,929 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:36:30,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:31,164 INFO L124 PetriNetUnfolderBase]: 94/643 cut-off events. [2023-08-04 09:36:31,164 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:36:31,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 643 events. 94/643 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3081 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-04 09:36:31,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:31,186 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:31,189 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:36:31,201 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:31,204 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:31,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:31,295 INFO L124 PetriNetUnfolderBase]: 94/643 cut-off events. [2023-08-04 09:36:31,296 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:36:31,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 643 events. 94/643 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3081 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-04 09:36:31,308 INFO L119 LiptonReduction]: Number of co-enabled transitions 4682 [2023-08-04 09:36:36,605 INFO L134 LiptonReduction]: Checked pairs total: 10681 [2023-08-04 09:36:36,605 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-08-04 09:36:36,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:36:36,626 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;@1a34c022, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:36:36,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:36:36,631 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:36:36,631 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-08-04 09:36:36,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:36:36,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:36,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:36,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:36,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:36,637 INFO L85 PathProgramCache]: Analyzing trace with hash -274968026, now seen corresponding path program 1 times [2023-08-04 09:36:36,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:36,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463789690] [2023-08-04 09:36:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:36,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:36,894 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 09:36:36,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:36,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463789690] [2023-08-04 09:36:36,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463789690] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:36,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:36:36,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:36:36,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838010479] [2023-08-04 09:36:36,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:36,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:36,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:36,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:36,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:36:36,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 372 [2023-08-04 09:36:36,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 50 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:36,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:36,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 372 [2023-08-04 09:36:36,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:37,274 INFO L124 PetriNetUnfolderBase]: 1837/2914 cut-off events. [2023-08-04 09:36:37,274 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2023-08-04 09:36:37,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5846 conditions, 2914 events. 1837/2914 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15439 event pairs, 921 based on Foata normal form. 0/2069 useless extension candidates. Maximal degree in co-relation 5021. Up to 2680 conditions per place. [2023-08-04 09:36:37,293 INFO L140 encePairwiseOnDemand]: 368/372 looper letters, 41 selfloop transitions, 2 changer transitions 3/53 dead transitions. [2023-08-04 09:36:37,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 236 flow [2023-08-04 09:36:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:37,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-04 09:36:37,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.482078853046595 [2023-08-04 09:36:37,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-04 09:36:37,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-04 09:36:37,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:37,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-04 09:36:37,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:37,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:37,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:37,334 INFO L175 Difference]: Start difference. First operand has 45 places, 50 transitions, 142 flow. Second operand 3 states and 538 transitions. [2023-08-04 09:36:37,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 236 flow [2023-08-04 09:36:37,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:36:37,342 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 140 flow [2023-08-04 09:36:37,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-08-04 09:36:37,347 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-04 09:36:37,348 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 140 flow [2023-08-04 09:36:37,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:37,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:37,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:37,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:36:37,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:37,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:37,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1306389606, now seen corresponding path program 1 times [2023-08-04 09:36:37,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:37,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908353053] [2023-08-04 09:36:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:37,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:37,511 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 09:36:37,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:37,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908353053] [2023-08-04 09:36:37,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908353053] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:37,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342965951] [2023-08-04 09:36:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:37,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:37,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:37,519 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 09:36:37,534 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 09:36:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:37,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:37,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:37,614 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 09:36:37,614 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:37,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342965951] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:37,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:37,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:36:37,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304617914] [2023-08-04 09:36:37,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:37,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:37,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:37,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:37,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:37,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 372 [2023-08-04 09:36:37,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:37,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:37,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 372 [2023-08-04 09:36:37,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:37,881 INFO L124 PetriNetUnfolderBase]: 1745/2747 cut-off events. [2023-08-04 09:36:37,882 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2023-08-04 09:36:37,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5581 conditions, 2747 events. 1745/2747 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14093 event pairs, 740 based on Foata normal form. 0/1939 useless extension candidates. Maximal degree in co-relation 4759. Up to 2540 conditions per place. [2023-08-04 09:36:37,899 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 45 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 09:36:37,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 248 flow [2023-08-04 09:36:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-04 09:36:37,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2023-08-04 09:36:37,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-04 09:36:37,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-04 09:36:37,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:37,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-04 09:36:37,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:37,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:37,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:37,912 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 140 flow. Second operand 3 states and 540 transitions. [2023-08-04 09:36:37,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 248 flow [2023-08-04 09:36:37,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 236 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:36:37,915 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 136 flow [2023-08-04 09:36:37,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2023-08-04 09:36:37,916 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2023-08-04 09:36:37,916 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 136 flow [2023-08-04 09:36:37,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:37,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:37,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:37,930 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 09:36:38,123 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 09:36:38,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:38,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:38,124 INFO L85 PathProgramCache]: Analyzing trace with hash -592734214, now seen corresponding path program 1 times [2023-08-04 09:36:38,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:38,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249539308] [2023-08-04 09:36:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:38,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:38,201 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 09:36:38,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:38,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249539308] [2023-08-04 09:36:38,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249539308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:38,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544892053] [2023-08-04 09:36:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:38,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:38,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:38,207 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 09:36:38,211 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 09:36:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:38,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:38,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:38,290 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 09:36:38,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:38,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544892053] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:38,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:38,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:36:38,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558864771] [2023-08-04 09:36:38,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:38,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:38,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:38,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:38,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:38,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 372 [2023-08-04 09:36:38,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:38,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:38,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 372 [2023-08-04 09:36:38,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:38,541 INFO L124 PetriNetUnfolderBase]: 1745/2779 cut-off events. [2023-08-04 09:36:38,542 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-08-04 09:36:38,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5657 conditions, 2779 events. 1745/2779 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13968 event pairs, 935 based on Foata normal form. 0/2003 useless extension candidates. Maximal degree in co-relation 2560. Up to 2386 conditions per place. [2023-08-04 09:36:38,560 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 46 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 09:36:38,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 248 flow [2023-08-04 09:36:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-04 09:36:38,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48476702508960573 [2023-08-04 09:36:38,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-04 09:36:38,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-04 09:36:38,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:38,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-04 09:36:38,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:38,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:38,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:38,567 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 136 flow. Second operand 3 states and 541 transitions. [2023-08-04 09:36:38,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 248 flow [2023-08-04 09:36:38,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:36:38,569 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 140 flow [2023-08-04 09:36:38,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-08-04 09:36:38,570 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-08-04 09:36:38,570 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 140 flow [2023-08-04 09:36:38,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:38,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:38,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:38,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:36:38,776 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 09:36:38,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:38,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash 91245969, now seen corresponding path program 1 times [2023-08-04 09:36:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:38,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301019165] [2023-08-04 09:36:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:38,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:38,866 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 09:36:38,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301019165] [2023-08-04 09:36:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301019165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758454436] [2023-08-04 09:36:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:38,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:38,868 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 09:36:38,871 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 09:36:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:38,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:38,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:38,952 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 09:36:38,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:38,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758454436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:38,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:38,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:36:38,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265037967] [2023-08-04 09:36:38,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:38,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:38,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:38,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:38,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:38,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 372 [2023-08-04 09:36:38,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:38,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:38,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 372 [2023-08-04 09:36:38,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:39,174 INFO L124 PetriNetUnfolderBase]: 1165/1891 cut-off events. [2023-08-04 09:36:39,174 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-04 09:36:39,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3982 conditions, 1891 events. 1165/1891 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8608 event pairs, 674 based on Foata normal form. 0/1399 useless extension candidates. Maximal degree in co-relation 1740. Up to 1466 conditions per place. [2023-08-04 09:36:39,183 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 50 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 09:36:39,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 275 flow [2023-08-04 09:36:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-08-04 09:36:39,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883512544802867 [2023-08-04 09:36:39,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-08-04 09:36:39,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-08-04 09:36:39,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:39,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-08-04 09:36:39,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,190 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 140 flow. Second operand 3 states and 545 transitions. [2023-08-04 09:36:39,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 275 flow [2023-08-04 09:36:39,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:36:39,192 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 148 flow [2023-08-04 09:36:39,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-08-04 09:36:39,193 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-04 09:36:39,193 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 148 flow [2023-08-04 09:36:39,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:39,194 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] [2023-08-04 09:36:39,207 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 09:36:39,399 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 09:36:39,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:39,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash -307367133, now seen corresponding path program 1 times [2023-08-04 09:36:39,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:39,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90185289] [2023-08-04 09:36:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:39,490 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 09:36:39,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90185289] [2023-08-04 09:36:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90185289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660421407] [2023-08-04 09:36:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:39,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:39,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:39,496 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 09:36:39,499 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 09:36:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:39,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:39,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:39,593 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 09:36:39,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:39,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660421407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:39,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:39,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:36:39,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630480756] [2023-08-04 09:36:39,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:39,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:39,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:39,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:39,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 372 [2023-08-04 09:36:39,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:39,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 372 [2023-08-04 09:36:39,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:39,783 INFO L124 PetriNetUnfolderBase]: 978/1612 cut-off events. [2023-08-04 09:36:39,783 INFO L125 PetriNetUnfolderBase]: For 230/230 co-relation queries the response was YES. [2023-08-04 09:36:39,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3519 conditions, 1612 events. 978/1612 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7132 event pairs, 623 based on Foata normal form. 0/1278 useless extension candidates. Maximal degree in co-relation 1536. Up to 1260 conditions per place. [2023-08-04 09:36:39,791 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 51 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 09:36:39,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 285 flow [2023-08-04 09:36:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2023-08-04 09:36:39,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883512544802867 [2023-08-04 09:36:39,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2023-08-04 09:36:39,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2023-08-04 09:36:39,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:39,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2023-08-04 09:36:39,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,798 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 148 flow. Second operand 3 states and 545 transitions. [2023-08-04 09:36:39,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 285 flow [2023-08-04 09:36:39,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:39,802 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 158 flow [2023-08-04 09:36:39,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2023-08-04 09:36:39,805 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-04 09:36:39,805 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 158 flow [2023-08-04 09:36:39,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:39,806 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] [2023-08-04 09:36:39,813 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 09:36:40,010 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 09:36:40,010 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:40,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:40,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1430860962, now seen corresponding path program 1 times [2023-08-04 09:36:40,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:40,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507215675] [2023-08-04 09:36:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:40,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:40,083 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 09:36:40,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:40,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507215675] [2023-08-04 09:36:40,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507215675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:40,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336302157] [2023-08-04 09:36:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:40,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:40,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:40,085 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 09:36:40,087 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 09:36:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:40,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:40,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:40,190 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 09:36:40,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:40,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336302157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:40,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:40,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:36:40,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036309140] [2023-08-04 09:36:40,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:40,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:40,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 372 [2023-08-04 09:36:40,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:40,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 372 [2023-08-04 09:36:40,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:40,366 INFO L124 PetriNetUnfolderBase]: 968/1594 cut-off events. [2023-08-04 09:36:40,366 INFO L125 PetriNetUnfolderBase]: For 221/221 co-relation queries the response was YES. [2023-08-04 09:36:40,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3529 conditions, 1594 events. 968/1594 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6983 event pairs, 712 based on Foata normal form. 0/1284 useless extension candidates. Maximal degree in co-relation 2680. Up to 1447 conditions per place. [2023-08-04 09:36:40,375 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 46 selfloop transitions, 2 changer transitions 2/57 dead transitions. [2023-08-04 09:36:40,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 274 flow [2023-08-04 09:36:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-04 09:36:40,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48476702508960573 [2023-08-04 09:36:40,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-04 09:36:40,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-04 09:36:40,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:40,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-04 09:36:40,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,382 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 158 flow. Second operand 3 states and 541 transitions. [2023-08-04 09:36:40,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 274 flow [2023-08-04 09:36:40,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:40,390 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 160 flow [2023-08-04 09:36:40,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-08-04 09:36:40,392 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-08-04 09:36:40,392 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 160 flow [2023-08-04 09:36:40,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:40,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:40,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 09:36:40,598 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 09:36:40,598 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:40,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:40,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1934069942, now seen corresponding path program 1 times [2023-08-04 09:36:40,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:40,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511582898] [2023-08-04 09:36:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:40,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:40,666 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 09:36:40,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:40,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511582898] [2023-08-04 09:36:40,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511582898] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:40,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690661595] [2023-08-04 09:36:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:40,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:40,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:40,670 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 09:36:40,693 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 09:36:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:40,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:36:40,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:40,810 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 09:36:40,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:40,833 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 09:36:40,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690661595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:40,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:40,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:36:40,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392423311] [2023-08-04 09:36:40,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:40,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:36:40,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:36:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:40,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 372 [2023-08-04 09:36:40,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:40,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 372 [2023-08-04 09:36:40,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:40,878 INFO L124 PetriNetUnfolderBase]: 11/26 cut-off events. [2023-08-04 09:36:40,878 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:36:40,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 26 events. 11/26 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 1 based on Foata normal form. 4/25 useless extension candidates. Maximal degree in co-relation 55. Up to 17 conditions per place. [2023-08-04 09:36:40,878 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-04 09:36:40,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 58 flow [2023-08-04 09:36:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:36:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:36:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 666 transitions. [2023-08-04 09:36:40,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475806451612903 [2023-08-04 09:36:40,881 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 666 transitions. [2023-08-04 09:36:40,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 666 transitions. [2023-08-04 09:36:40,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:40,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 666 transitions. [2023-08-04 09:36:40,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.5) internal successors, (666), 4 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,884 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,885 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 160 flow. Second operand 4 states and 666 transitions. [2023-08-04 09:36:40,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 58 flow [2023-08-04 09:36:40,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:40,885 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 09:36:40,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-04 09:36:40,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -24 predicate places. [2023-08-04 09:36:40,886 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 09:36:40,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:36:40,899 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 09:36:41,096 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 09:36:41,096 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:41,098 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:36:41,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:41,149 INFO L124 PetriNetUnfolderBase]: 94/643 cut-off events. [2023-08-04 09:36:41,150 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:36:41,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 643 events. 94/643 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3081 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-04 09:36:41,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:41,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:41,154 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:36:41,154 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:41,155 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:41,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 434 flow [2023-08-04 09:36:41,200 INFO L124 PetriNetUnfolderBase]: 94/643 cut-off events. [2023-08-04 09:36:41,200 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:36:41,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 643 events. 94/643 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3081 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-04 09:36:41,234 INFO L119 LiptonReduction]: Number of co-enabled transitions 4682 [2023-08-04 09:36:45,811 INFO L134 LiptonReduction]: Checked pairs total: 11523 [2023-08-04 09:36:45,811 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-08-04 09:36:45,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:36:45,812 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;@1a34c022, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:36:45,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:36:45,816 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:36:45,816 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2023-08-04 09:36:45,816 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:36:45,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:45,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:36:45,816 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 09:36:45,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:45,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1034428306, now seen corresponding path program 1 times [2023-08-04 09:36:45,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:45,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45586692] [2023-08-04 09:36:45,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:45,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:36:45,848 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:36:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:36:45,872 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:36:45,872 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:36:45,872 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:36:45,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:36:45,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:36:45,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:36:45,873 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:36:45,874 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:36:45,874 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:36:45,874 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:36:45,896 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:36:45,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 234 transitions, 558 flow [2023-08-04 09:36:46,319 INFO L124 PetriNetUnfolderBase]: 857/4037 cut-off events. [2023-08-04 09:36:46,319 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:36:46,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 4037 events. 857/4037 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 32179 event pairs, 22 based on Foata normal form. 0/3424 useless extension candidates. Maximal degree in co-relation 2396. Up to 192 conditions per place. [2023-08-04 09:36:46,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 234 transitions, 558 flow [2023-08-04 09:36:46,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 234 transitions, 558 flow [2023-08-04 09:36:46,363 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:36:46,363 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 234 transitions, 558 flow [2023-08-04 09:36:46,363 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 234 transitions, 558 flow [2023-08-04 09:36:46,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 234 transitions, 558 flow [2023-08-04 09:36:46,739 INFO L124 PetriNetUnfolderBase]: 857/4037 cut-off events. [2023-08-04 09:36:46,740 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:36:46,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 4037 events. 857/4037 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 32179 event pairs, 22 based on Foata normal form. 0/3424 useless extension candidates. Maximal degree in co-relation 2396. Up to 192 conditions per place. [2023-08-04 09:36:46,827 INFO L119 LiptonReduction]: Number of co-enabled transitions 11848 [2023-08-04 09:36:51,851 INFO L134 LiptonReduction]: Checked pairs total: 33886 [2023-08-04 09:36:51,851 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-04 09:36:51,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:36:51,853 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;@1a34c022, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:36:51,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:36:51,856 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:36:51,856 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2023-08-04 09:36:51,856 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:36:51,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:51,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:51,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:51,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash -374117907, now seen corresponding path program 1 times [2023-08-04 09:36:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:51,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305015180] [2023-08-04 09:36:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:51,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:51,892 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 09:36:51,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305015180] [2023-08-04 09:36:51,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305015180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:51,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:36:51,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:36:51,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031604585] [2023-08-04 09:36:51,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:51,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:51,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:36:51,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 09:36:51,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:51,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:51,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 09:36:51,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:15,401 INFO L124 PetriNetUnfolderBase]: 270741/354562 cut-off events. [2023-08-04 09:37:15,402 INFO L125 PetriNetUnfolderBase]: For 47809/47809 co-relation queries the response was YES. [2023-08-04 09:37:16,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709902 conditions, 354562 events. 270741/354562 cut-off events. For 47809/47809 co-relation queries the response was YES. Maximal size of possible extension queue 7947. Compared 2364211 event pairs, 165225 based on Foata normal form. 0/258110 useless extension candidates. Maximal degree in co-relation 262198. Up to 326037 conditions per place. [2023-08-04 09:37:17,580 INFO L140 encePairwiseOnDemand]: 421/425 looper letters, 62 selfloop transitions, 2 changer transitions 1/79 dead transitions. [2023-08-04 09:37:17,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 376 flow [2023-08-04 09:37:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:37:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:37:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-04 09:37:17,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894117647058824 [2023-08-04 09:37:17,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-04 09:37:17,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-04 09:37:17,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:17,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-04 09:37:17,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:37:17,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:37:17,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:37:17,595 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 240 flow. Second operand 3 states and 624 transitions. [2023-08-04 09:37:17,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 376 flow [2023-08-04 09:37:17,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 79 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:37:17,612 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 244 flow [2023-08-04 09:37:17,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2023-08-04 09:37:17,615 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 09:37:17,615 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 244 flow [2023-08-04 09:37:17,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:37:17,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:17,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:37:17,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:37:17,616 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:17,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:17,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1882122778, now seen corresponding path program 1 times [2023-08-04 09:37:17,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:17,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570437017] [2023-08-04 09:37:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:17,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:17,651 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 09:37:17,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570437017] [2023-08-04 09:37:17,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570437017] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:37:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881768602] [2023-08-04 09:37:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:17,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:17,653 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:37:17,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:37:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:17,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:37:17,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:37:17,746 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 09:37:17,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:37:17,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881768602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:37:17,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:37:17,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:37:17,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375252875] [2023-08-04 09:37:17,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:37:17,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:37:17,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:17,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:37:17,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:37:17,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 09:37:17,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:37:17,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:17,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 09:37:17,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:39,295 INFO L124 PetriNetUnfolderBase]: 263981/342960 cut-off events. [2023-08-04 09:37:39,295 INFO L125 PetriNetUnfolderBase]: For 40359/40359 co-relation queries the response was YES. [2023-08-04 09:37:40,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697370 conditions, 342960 events. 263981/342960 cut-off events. For 40359/40359 co-relation queries the response was YES. Maximal size of possible extension queue 7912. Compared 2236270 event pairs, 151891 based on Foata normal form. 0/246960 useless extension candidates. Maximal degree in co-relation 306306. Up to 323968 conditions per place. [2023-08-04 09:37:41,542 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 69 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-04 09:37:41,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 85 transitions, 408 flow [2023-08-04 09:37:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:37:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:37:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-04 09:37:41,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2023-08-04 09:37:41,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-04 09:37:41,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-04 09:37:41,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:41,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-04 09:37:41,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:37:41,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:37:41,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:37:41,549 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 244 flow. Second operand 3 states and 629 transitions. [2023-08-04 09:37:41,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 85 transitions, 408 flow [2023-08-04 09:37:41,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:37:41,583 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 250 flow [2023-08-04 09:37:41,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-04 09:37:41,584 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 09:37:41,584 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 250 flow [2023-08-04 09:37:41,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:37:41,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:41,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:37:41,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:37:41,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:41,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:41,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:41,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1641319863, now seen corresponding path program 1 times [2023-08-04 09:37:41,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:41,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471672714] [2023-08-04 09:37:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:41,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:41,822 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 09:37:41,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:41,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471672714] [2023-08-04 09:37:41,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471672714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:37:41,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086612243] [2023-08-04 09:37:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:41,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:41,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:41,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:37:41,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:37:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:41,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:37:41,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:37:41,904 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 09:37:41,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:37:41,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086612243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:37:41,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:37:41,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:37:41,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831116046] [2023-08-04 09:37:41,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:37:41,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:37:41,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:41,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:37:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:37:41,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 09:37:41,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:37:41,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:41,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 09:37:41,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:38:02,960 INFO L124 PetriNetUnfolderBase]: 261941/340858 cut-off events. [2023-08-04 09:38:02,961 INFO L125 PetriNetUnfolderBase]: For 26189/26189 co-relation queries the response was YES. [2023-08-04 09:38:03,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695762 conditions, 340858 events. 261941/340858 cut-off events. For 26189/26189 co-relation queries the response was YES. Maximal size of possible extension queue 8699. Compared 2221482 event pairs, 165830 based on Foata normal form. 0/246188 useless extension candidates. Maximal degree in co-relation 211472. Up to 316598 conditions per place. [2023-08-04 09:38:04,902 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 74 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-04 09:38:04,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 90 transitions, 432 flow [2023-08-04 09:38:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:38:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:38:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-04 09:38:04,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4964705882352941 [2023-08-04 09:38:04,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-04 09:38:04,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-04 09:38:04,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:38:04,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-04 09:38:04,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:04,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:04,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:04,908 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 250 flow. Second operand 3 states and 633 transitions. [2023-08-04 09:38:04,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 90 transitions, 432 flow [2023-08-04 09:38:04,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 90 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:38:04,922 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 260 flow [2023-08-04 09:38:04,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2023-08-04 09:38:04,923 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-08-04 09:38:04,923 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 260 flow [2023-08-04 09:38:04,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:04,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:38:04,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:38:04,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:38:05,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 09:38:05,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:38:05,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:38:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash 605418523, now seen corresponding path program 1 times [2023-08-04 09:38:05,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:38:05,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552909726] [2023-08-04 09:38:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:05,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:38:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:38:05,173 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 09:38:05,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:38:05,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552909726] [2023-08-04 09:38:05,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552909726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:38:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784418433] [2023-08-04 09:38:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:05,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:38:05,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:38:05,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:38:05,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:38:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:38:05,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:38:05,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:38:05,295 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 09:38:05,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:38:05,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784418433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:38:05,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:38:05,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:38:05,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158157859] [2023-08-04 09:38:05,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:38:05,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:38:05,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:38:05,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:38:05,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:38:05,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 09:38:05,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:05,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:38:05,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 09:38:05,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:38:25,977 INFO L124 PetriNetUnfolderBase]: 232509/304402 cut-off events. [2023-08-04 09:38:25,977 INFO L125 PetriNetUnfolderBase]: For 29135/29135 co-relation queries the response was YES. [2023-08-04 09:38:26,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628835 conditions, 304402 events. 232509/304402 cut-off events. For 29135/29135 co-relation queries the response was YES. Maximal size of possible extension queue 7423. Compared 1989092 event pairs, 140331 based on Foata normal form. 0/222886 useless extension candidates. Maximal degree in co-relation 180056. Up to 244950 conditions per place. [2023-08-04 09:38:27,893 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 82 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-04 09:38:27,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 489 flow [2023-08-04 09:38:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:38:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:38:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-08-04 09:38:27,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019607843137255 [2023-08-04 09:38:27,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-08-04 09:38:27,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-08-04 09:38:27,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:38:27,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-08-04 09:38:27,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:27,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:27,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:27,899 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 260 flow. Second operand 3 states and 640 transitions. [2023-08-04 09:38:27,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 489 flow [2023-08-04 09:38:27,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 487 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:38:27,928 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 270 flow [2023-08-04 09:38:27,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2023-08-04 09:38:27,929 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-08-04 09:38:27,929 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 270 flow [2023-08-04 09:38:27,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:27,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:38:27,930 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 09:38:27,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:38:28,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:38:28,130 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:38:28,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:38:28,131 INFO L85 PathProgramCache]: Analyzing trace with hash -967543110, now seen corresponding path program 1 times [2023-08-04 09:38:28,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:38:28,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679201447] [2023-08-04 09:38:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:28,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:38:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:38:28,175 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 09:38:28,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:38:28,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679201447] [2023-08-04 09:38:28,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679201447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:38:28,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759720074] [2023-08-04 09:38:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:28,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:38:28,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:38:28,176 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:38:28,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:38:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:38:28,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:38:28,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:38:28,271 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 09:38:28,272 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:38:28,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759720074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:38:28,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:38:28,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:38:28,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852982259] [2023-08-04 09:38:28,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:38:28,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:38:28,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:38:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:38:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:38:28,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 09:38:28,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:28,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:38:28,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 09:38:28,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:38:46,528 INFO L124 PetriNetUnfolderBase]: 215648/284953 cut-off events. [2023-08-04 09:38:46,529 INFO L125 PetriNetUnfolderBase]: For 43933/43933 co-relation queries the response was YES. [2023-08-04 09:38:47,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606565 conditions, 284953 events. 215648/284953 cut-off events. For 43933/43933 co-relation queries the response was YES. Maximal size of possible extension queue 6022. Compared 1869463 event pairs, 127560 based on Foata normal form. 0/216268 useless extension candidates. Maximal degree in co-relation 183190. Up to 214286 conditions per place. [2023-08-04 09:38:48,120 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 83 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-04 09:38:48,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 501 flow [2023-08-04 09:38:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:38:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:38:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-08-04 09:38:48,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019607843137255 [2023-08-04 09:38:48,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-08-04 09:38:48,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-08-04 09:38:48,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:38:48,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-08-04 09:38:48,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:48,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:48,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:48,127 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 270 flow. Second operand 3 states and 640 transitions. [2023-08-04 09:38:48,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 501 flow [2023-08-04 09:38:49,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 499 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:38:49,168 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 280 flow [2023-08-04 09:38:49,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2023-08-04 09:38:49,169 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 8 predicate places. [2023-08-04 09:38:49,169 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 280 flow [2023-08-04 09:38:49,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:49,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:38:49,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:38:49,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:38:49,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:38:49,374 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:38:49,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:38:49,374 INFO L85 PathProgramCache]: Analyzing trace with hash -453437857, now seen corresponding path program 1 times [2023-08-04 09:38:49,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:38:49,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590603295] [2023-08-04 09:38:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:38:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:38:49,415 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 09:38:49,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:38:49,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590603295] [2023-08-04 09:38:49,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590603295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:38:49,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111092591] [2023-08-04 09:38:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:49,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:38:49,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:38:49,417 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:38:49,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:38:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:38:49,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:38:49,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:38:49,649 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 09:38:49,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:38:49,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111092591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:38:49,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:38:49,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:38:49,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746021675] [2023-08-04 09:38:49,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:38:49,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:38:49,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:38:49,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:38:49,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:38:49,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 09:38:49,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:49,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:38:49,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 09:38:49,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:08,165 INFO L124 PetriNetUnfolderBase]: 214403/284192 cut-off events. [2023-08-04 09:39:08,166 INFO L125 PetriNetUnfolderBase]: For 47501/47501 co-relation queries the response was YES. [2023-08-04 09:39:08,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614994 conditions, 284192 events. 214403/284192 cut-off events. For 47501/47501 co-relation queries the response was YES. Maximal size of possible extension queue 5827. Compared 1867504 event pairs, 145911 based on Foata normal form. 0/220042 useless extension candidates. Maximal degree in co-relation 340208. Up to 243932 conditions per place. [2023-08-04 09:39:10,029 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 84 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-04 09:39:10,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 100 transitions, 513 flow [2023-08-04 09:39:10,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-08-04 09:39:10,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019607843137255 [2023-08-04 09:39:10,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-08-04 09:39:10,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-08-04 09:39:10,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:10,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-08-04 09:39:10,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:10,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:10,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:10,035 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 280 flow. Second operand 3 states and 640 transitions. [2023-08-04 09:39:10,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 100 transitions, 513 flow [2023-08-04 09:39:22,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:22,193 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 290 flow [2023-08-04 09:39:22,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2023-08-04 09:39:22,194 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-04 09:39:22,194 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 290 flow [2023-08-04 09:39:22,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:22,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:22,194 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] [2023-08-04 09:39:22,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:22,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:39:22,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:22,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:22,397 INFO L85 PathProgramCache]: Analyzing trace with hash 371152909, now seen corresponding path program 1 times [2023-08-04 09:39:22,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:22,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452814901] [2023-08-04 09:39:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:22,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:22,459 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 09:39:22,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:22,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452814901] [2023-08-04 09:39:22,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452814901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:22,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128184490] [2023-08-04 09:39:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:22,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:22,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:22,461 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:22,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:39:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:22,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:39:22,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:22,581 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 09:39:22,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:22,598 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 09:39:22,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128184490] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:22,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:22,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:39:22,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581898969] [2023-08-04 09:39:22,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:22,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:39:22,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:22,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:39:22,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:22,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 425 [2023-08-04 09:39:22,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 290 flow. Second operand has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:22,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:22,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 425 [2023-08-04 09:39:22,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:42,348 INFO L124 PetriNetUnfolderBase]: 203253/268741 cut-off events. [2023-08-04 09:39:42,348 INFO L125 PetriNetUnfolderBase]: For 42628/42628 co-relation queries the response was YES. [2023-08-04 09:39:43,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584148 conditions, 268741 events. 203253/268741 cut-off events. For 42628/42628 co-relation queries the response was YES. Maximal size of possible extension queue 5903. Compared 1749003 event pairs, 99180 based on Foata normal form. 4/208543 useless extension candidates. Maximal degree in co-relation 498625. Up to 255519 conditions per place. [2023-08-04 09:39:44,157 INFO L140 encePairwiseOnDemand]: 421/425 looper letters, 72 selfloop transitions, 3 changer transitions 1/90 dead transitions. [2023-08-04 09:39:44,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 464 flow [2023-08-04 09:39:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:39:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:39:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 812 transitions. [2023-08-04 09:39:44,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4776470588235294 [2023-08-04 09:39:44,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 812 transitions. [2023-08-04 09:39:44,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 812 transitions. [2023-08-04 09:39:44,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:44,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 812 transitions. [2023-08-04 09:39:44,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:44,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:44,164 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:44,164 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 290 flow. Second operand 4 states and 812 transitions. [2023-08-04 09:39:44,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 464 flow [2023-08-04 09:39:53,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 90 transitions, 462 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:53,516 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 302 flow [2023-08-04 09:39:53,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2023-08-04 09:39:53,516 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 14 predicate places. [2023-08-04 09:39:53,516 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 302 flow [2023-08-04 09:39:53,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:53,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:53,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:53,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:53,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 09:39:53,718 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:53,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash -755433742, now seen corresponding path program 1 times [2023-08-04 09:39:53,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:53,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771859693] [2023-08-04 09:39:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:53,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:39:53,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:53,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771859693] [2023-08-04 09:39:53,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771859693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:53,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141416883] [2023-08-04 09:39:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:53,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:53,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:53,772 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:39:53,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:39:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:53,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:39:53,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:39:53,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:39:53,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141416883] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:53,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:53,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:39:53,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153269079] [2023-08-04 09:39:53,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:53,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:39:53,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:53,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:39:53,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:53,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 425 [2023-08-04 09:39:53,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 191.8) internal successors, (959), 5 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:53,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:53,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 425 [2023-08-04 09:39:53,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:11,022 INFO L124 PetriNetUnfolderBase]: 192569/254426 cut-off events. [2023-08-04 09:40:11,023 INFO L125 PetriNetUnfolderBase]: For 36128/36128 co-relation queries the response was YES. [2023-08-04 09:40:11,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553045 conditions, 254426 events. 192569/254426 cut-off events. For 36128/36128 co-relation queries the response was YES. Maximal size of possible extension queue 5788. Compared 1650239 event pairs, 87274 based on Foata normal form. 64/197475 useless extension candidates. Maximal degree in co-relation 468410. Up to 239572 conditions per place. [2023-08-04 09:40:12,528 INFO L140 encePairwiseOnDemand]: 421/425 looper letters, 84 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2023-08-04 09:40:12,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 102 transitions, 524 flow [2023-08-04 09:40:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:40:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:40:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 824 transitions. [2023-08-04 09:40:12,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48470588235294115 [2023-08-04 09:40:12,531 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 824 transitions. [2023-08-04 09:40:12,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 824 transitions. [2023-08-04 09:40:12,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:12,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 824 transitions. [2023-08-04 09:40:12,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:12,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:12,536 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:12,536 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 302 flow. Second operand 4 states and 824 transitions. [2023-08-04 09:40:12,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 102 transitions, 524 flow [2023-08-04 09:40:21,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 102 transitions, 514 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:40:21,705 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 312 flow [2023-08-04 09:40:21,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2023-08-04 09:40:21,706 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 16 predicate places. [2023-08-04 09:40:21,706 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 312 flow [2023-08-04 09:40:21,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.8) internal successors, (959), 5 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:21,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:21,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:21,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 09:40:21,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 09:40:21,913 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:21,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:21,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1245367632, now seen corresponding path program 1 times [2023-08-04 09:40:21,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:21,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438336552] [2023-08-04 09:40:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:21,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:40:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:21,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438336552] [2023-08-04 09:40:21,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438336552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:21,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146620817] [2023-08-04 09:40:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:21,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:21,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:21,970 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:40:21,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 09:40:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:22,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:40:22,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:40:22,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:40:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:40:22,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146620817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:40:22,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:40:22,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:40:22,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354037502] [2023-08-04 09:40:22,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:40:22,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:40:22,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:22,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:40:22,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:40:22,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 425 [2023-08-04 09:40:22,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 312 flow. Second operand has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:22,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:22,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 425 [2023-08-04 09:40:22,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:38,850 INFO L124 PetriNetUnfolderBase]: 184409/243930 cut-off events. [2023-08-04 09:40:38,850 INFO L125 PetriNetUnfolderBase]: For 33981/33981 co-relation queries the response was YES. [2023-08-04 09:40:39,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528867 conditions, 243930 events. 184409/243930 cut-off events. For 33981/33981 co-relation queries the response was YES. Maximal size of possible extension queue 5873. Compared 1564361 event pairs, 101653 based on Foata normal form. 512/189923 useless extension candidates. Maximal degree in co-relation 444770. Up to 210308 conditions per place. [2023-08-04 09:40:40,537 INFO L140 encePairwiseOnDemand]: 421/425 looper letters, 91 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2023-08-04 09:40:40,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 109 transitions, 560 flow [2023-08-04 09:40:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:40:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:40:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 830 transitions. [2023-08-04 09:40:40,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48823529411764705 [2023-08-04 09:40:40,540 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 830 transitions. [2023-08-04 09:40:40,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 830 transitions. [2023-08-04 09:40:40,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:40,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 830 transitions. [2023-08-04 09:40:40,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:40,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:40,544 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:40,544 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 312 flow. Second operand 4 states and 830 transitions. [2023-08-04 09:40:40,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 109 transitions, 560 flow [2023-08-04 09:40:49,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 109 transitions, 556 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:40:49,458 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 328 flow [2023-08-04 09:40:49,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2023-08-04 09:40:49,458 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2023-08-04 09:40:49,459 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 328 flow [2023-08-04 09:40:49,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:49,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:49,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:49,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 09:40:49,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:49,665 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:49,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:49,665 INFO L85 PathProgramCache]: Analyzing trace with hash -941892508, now seen corresponding path program 1 times [2023-08-04 09:40:49,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:49,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470518122] [2023-08-04 09:40:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:49,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:40:49,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:49,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470518122] [2023-08-04 09:40:49,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470518122] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:49,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889122167] [2023-08-04 09:40:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:49,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:49,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:49,727 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:40:49,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 09:40:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:49,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:40:49,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:40:49,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:40:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:40:49,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889122167] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:40:49,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:40:49,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:40:49,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458471669] [2023-08-04 09:40:49,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:40:49,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:40:49,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:49,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:40:49,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:40:49,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 425 [2023-08-04 09:40:49,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 192.2) internal successors, (961), 5 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:49,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:49,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 425 [2023-08-04 09:40:49,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:00,975 INFO L124 PetriNetUnfolderBase]: 122789/163486 cut-off events. [2023-08-04 09:41:00,975 INFO L125 PetriNetUnfolderBase]: For 37261/37261 co-relation queries the response was YES. [2023-08-04 09:41:01,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359953 conditions, 163486 events. 122789/163486 cut-off events. For 37261/37261 co-relation queries the response was YES. Maximal size of possible extension queue 2974. Compared 1003937 event pairs, 50752 based on Foata normal form. 2048/128607 useless extension candidates. Maximal degree in co-relation 339202. Up to 85965 conditions per place. [2023-08-04 09:41:02,211 INFO L140 encePairwiseOnDemand]: 421/425 looper letters, 99 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-08-04 09:41:02,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 117 transitions, 622 flow [2023-08-04 09:41:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:41:02,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:41:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 837 transitions. [2023-08-04 09:41:02,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923529411764706 [2023-08-04 09:41:02,214 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 837 transitions. [2023-08-04 09:41:02,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 837 transitions. [2023-08-04 09:41:02,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:02,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 837 transitions. [2023-08-04 09:41:02,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:02,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:02,218 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:02,218 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 328 flow. Second operand 4 states and 837 transitions. [2023-08-04 09:41:02,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 117 transitions, 622 flow [2023-08-04 09:41:05,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 117 transitions, 618 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:41:05,755 INFO L231 Difference]: Finished difference. Result has 89 places, 82 transitions, 344 flow [2023-08-04 09:41:05,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=89, PETRI_TRANSITIONS=82} [2023-08-04 09:41:05,756 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2023-08-04 09:41:05,756 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 82 transitions, 344 flow [2023-08-04 09:41:05,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.2) internal successors, (961), 5 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:05,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:05,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:05,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 09:41:05,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 09:41:05,957 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:05,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1704044220, now seen corresponding path program 1 times [2023-08-04 09:41:05,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:05,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878808320] [2023-08-04 09:41:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:05,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 09:41:06,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:06,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878808320] [2023-08-04 09:41:06,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878808320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:06,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830778441] [2023-08-04 09:41:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:06,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:06,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:06,040 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:41:06,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 09:41:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:06,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:41:06,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 09:41:06,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:41:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 09:41:06,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830778441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:41:06,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:41:06,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:41:06,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066001315] [2023-08-04 09:41:06,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:41:06,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:41:06,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:06,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:41:06,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:41:06,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 425 [2023-08-04 09:41:06,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 82 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 192.6) internal successors, (963), 5 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:06,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:06,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 425 [2023-08-04 09:41:06,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:18,199 INFO L124 PetriNetUnfolderBase]: 117609/156223 cut-off events. [2023-08-04 09:41:18,199 INFO L125 PetriNetUnfolderBase]: For 58418/58418 co-relation queries the response was YES. [2023-08-04 09:41:18,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361870 conditions, 156223 events. 117609/156223 cut-off events. For 58418/58418 co-relation queries the response was YES. Maximal size of possible extension queue 2974. Compared 951461 event pairs, 73096 based on Foata normal form. 889/121673 useless extension candidates. Maximal degree in co-relation 358845. Up to 114672 conditions per place. [2023-08-04 09:41:19,446 INFO L140 encePairwiseOnDemand]: 421/425 looper letters, 100 selfloop transitions, 4 changer transitions 0/118 dead transitions. [2023-08-04 09:41:19,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 640 flow [2023-08-04 09:41:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:41:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:41:19,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 837 transitions. [2023-08-04 09:41:19,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923529411764706 [2023-08-04 09:41:19,448 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 837 transitions. [2023-08-04 09:41:19,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 837 transitions. [2023-08-04 09:41:19,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:19,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 837 transitions. [2023-08-04 09:41:19,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:19,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:19,452 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:19,452 INFO L175 Difference]: Start difference. First operand has 89 places, 82 transitions, 344 flow. Second operand 4 states and 837 transitions. [2023-08-04 09:41:19,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 640 flow [2023-08-04 09:41:23,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 118 transitions, 636 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:41:23,052 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 360 flow [2023-08-04 09:41:23,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=360, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2023-08-04 09:41:23,053 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 28 predicate places. [2023-08-04 09:41:23,053 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 360 flow [2023-08-04 09:41:23,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.6) internal successors, (963), 5 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:23,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:23,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:23,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-04 09:41:23,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:23,254 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:23,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:23,254 INFO L85 PathProgramCache]: Analyzing trace with hash 533036519, now seen corresponding path program 1 times [2023-08-04 09:41:23,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:23,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684487830] [2023-08-04 09:41:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:23,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:41:23,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:23,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684487830] [2023-08-04 09:41:23,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684487830] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:23,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362261119] [2023-08-04 09:41:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:23,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:23,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:23,320 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:41:23,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 09:41:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:23,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:41:23,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:41:23,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:41:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:41:23,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362261119] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:41:23,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:41:23,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:41:23,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950063223] [2023-08-04 09:41:23,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:41:23,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:41:23,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:41:23,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:41:23,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 425 [2023-08-04 09:41:23,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 360 flow. Second operand has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:23,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:23,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 425 [2023-08-04 09:41:23,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:35,341 INFO L124 PetriNetUnfolderBase]: 117591/156186 cut-off events. [2023-08-04 09:41:35,341 INFO L125 PetriNetUnfolderBase]: For 57644/57644 co-relation queries the response was YES. [2023-08-04 09:41:36,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368563 conditions, 156186 events. 117591/156186 cut-off events. For 57644/57644 co-relation queries the response was YES. Maximal size of possible extension queue 2974. Compared 951516 event pairs, 90560 based on Foata normal form. 21/120774 useless extension candidates. Maximal degree in co-relation 365445. Up to 146801 conditions per place. [2023-08-04 09:41:36,470 INFO L140 encePairwiseOnDemand]: 421/425 looper letters, 101 selfloop transitions, 3 changer transitions 1/119 dead transitions. [2023-08-04 09:41:36,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 119 transitions, 658 flow [2023-08-04 09:41:36,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:41:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:41:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 837 transitions. [2023-08-04 09:41:36,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923529411764706 [2023-08-04 09:41:36,472 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 837 transitions. [2023-08-04 09:41:36,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 837 transitions. [2023-08-04 09:41:36,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:36,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 837 transitions. [2023-08-04 09:41:36,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:36,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:36,476 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:36,476 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 360 flow. Second operand 4 states and 837 transitions. [2023-08-04 09:41:36,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 119 transitions, 658 flow [2023-08-04 09:41:43,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 119 transitions, 654 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:41:43,455 INFO L231 Difference]: Finished difference. Result has 97 places, 83 transitions, 370 flow [2023-08-04 09:41:43,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=97, PETRI_TRANSITIONS=83} [2023-08-04 09:41:43,456 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 32 predicate places. [2023-08-04 09:41:43,456 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 83 transitions, 370 flow [2023-08-04 09:41:43,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:43,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:43,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:41:43,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 09:41:43,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:43,657 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:43,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:43,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1723881589, now seen corresponding path program 1 times [2023-08-04 09:41:43,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:43,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054034297] [2023-08-04 09:41:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:43,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:41:43,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:43,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054034297] [2023-08-04 09:41:43,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054034297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:41:43,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:41:43,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:41:43,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059461048] [2023-08-04 09:41:43,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:41:43,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:41:43,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:43,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:41:43,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:41:43,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 425 [2023-08-04 09:41:43,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 83 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:43,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:43,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 425 [2023-08-04 09:41:43,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:58,890 INFO L124 PetriNetUnfolderBase]: 154460/201384 cut-off events. [2023-08-04 09:41:58,891 INFO L125 PetriNetUnfolderBase]: For 79246/79246 co-relation queries the response was YES. [2023-08-04 09:41:59,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469539 conditions, 201384 events. 154460/201384 cut-off events. For 79246/79246 co-relation queries the response was YES. Maximal size of possible extension queue 3922. Compared 1224859 event pairs, 21076 based on Foata normal form. 0/159423 useless extension candidates. Maximal degree in co-relation 469243. Up to 130387 conditions per place. [2023-08-04 09:42:00,318 INFO L140 encePairwiseOnDemand]: 419/425 looper letters, 179 selfloop transitions, 7 changer transitions 0/199 dead transitions. [2023-08-04 09:42:00,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 199 transitions, 1260 flow [2023-08-04 09:42:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:42:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:42:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1077 transitions. [2023-08-04 09:42:00,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068235294117647 [2023-08-04 09:42:00,320 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1077 transitions. [2023-08-04 09:42:00,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1077 transitions. [2023-08-04 09:42:00,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:42:00,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1077 transitions. [2023-08-04 09:42:00,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.4) internal successors, (1077), 5 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:00,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 425.0) internal successors, (2550), 6 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:00,325 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 425.0) internal successors, (2550), 6 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:00,325 INFO L175 Difference]: Start difference. First operand has 97 places, 83 transitions, 370 flow. Second operand 5 states and 1077 transitions. [2023-08-04 09:42:00,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 199 transitions, 1260 flow [2023-08-04 09:42:09,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 199 transitions, 1251 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 09:42:09,944 INFO L231 Difference]: Finished difference. Result has 102 places, 89 transitions, 416 flow [2023-08-04 09:42:09,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=416, PETRI_PLACES=102, PETRI_TRANSITIONS=89} [2023-08-04 09:42:09,945 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 37 predicate places. [2023-08-04 09:42:09,945 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 89 transitions, 416 flow [2023-08-04 09:42:09,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:09,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:42:09,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:42:09,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 09:42:09,945 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:42:09,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:42:09,946 INFO L85 PathProgramCache]: Analyzing trace with hash 290531537, now seen corresponding path program 1 times [2023-08-04 09:42:09,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:42:09,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147912899] [2023-08-04 09:42:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:42:09,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:42:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:42:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-04 09:42:10,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:42:10,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147912899] [2023-08-04 09:42:10,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147912899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:42:10,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:42:10,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:42:10,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120499851] [2023-08-04 09:42:10,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:42:10,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:42:10,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:42:10,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:42:10,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:42:10,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 425 [2023-08-04 09:42:10,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 89 transitions, 416 flow. Second operand has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:10,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:42:10,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 425 [2023-08-04 09:42:10,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:42:31,936 INFO L124 PetriNetUnfolderBase]: 201470/264601 cut-off events. [2023-08-04 09:42:31,936 INFO L125 PetriNetUnfolderBase]: For 194033/194033 co-relation queries the response was YES. [2023-08-04 09:42:33,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684434 conditions, 264601 events. 201470/264601 cut-off events. For 194033/194033 co-relation queries the response was YES. Maximal size of possible extension queue 5319. Compared 1700518 event pairs, 45563 based on Foata normal form. 0/219030 useless extension candidates. Maximal degree in co-relation 684105. Up to 177446 conditions per place. [2023-08-04 09:42:34,288 INFO L140 encePairwiseOnDemand]: 419/425 looper letters, 164 selfloop transitions, 11 changer transitions 0/189 dead transitions. [2023-08-04 09:42:34,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 189 transitions, 1242 flow [2023-08-04 09:42:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:42:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:42:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1064 transitions. [2023-08-04 09:42:34,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007058823529412 [2023-08-04 09:42:34,290 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1064 transitions. [2023-08-04 09:42:34,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1064 transitions. [2023-08-04 09:42:34,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:42:34,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1064 transitions. [2023-08-04 09:42:34,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.8) internal successors, (1064), 5 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:34,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 425.0) internal successors, (2550), 6 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:34,294 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 425.0) internal successors, (2550), 6 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:34,294 INFO L175 Difference]: Start difference. First operand has 102 places, 89 transitions, 416 flow. Second operand 5 states and 1064 transitions. [2023-08-04 09:42:34,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 189 transitions, 1242 flow [2023-08-04 09:42:49,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 189 transitions, 1236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:42:49,840 INFO L231 Difference]: Finished difference. Result has 108 places, 95 transitions, 482 flow [2023-08-04 09:42:49,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=482, PETRI_PLACES=108, PETRI_TRANSITIONS=95} [2023-08-04 09:42:49,841 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 43 predicate places. [2023-08-04 09:42:49,841 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 95 transitions, 482 flow [2023-08-04 09:42:49,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:49,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:42:49,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:42:49,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 09:42:49,841 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:42:49,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:42:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2090344753, now seen corresponding path program 2 times [2023-08-04 09:42:49,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:42:49,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631482134] [2023-08-04 09:42:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:42:49,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:42:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:42:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 09:42:50,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:42:50,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631482134] [2023-08-04 09:42:50,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631482134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:42:50,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:42:50,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 09:42:50,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311176536] [2023-08-04 09:42:50,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:42:50,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 09:42:50,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:42:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 09:42:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:42:50,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 425 [2023-08-04 09:42:50,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 95 transitions, 482 flow. Second operand has 6 states, 6 states have (on average 184.83333333333334) internal successors, (1109), 6 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:50,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:42:50,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 425 [2023-08-04 09:42:50,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:43:49,092 INFO L124 PetriNetUnfolderBase]: 496655/629527 cut-off events. [2023-08-04 09:43:49,093 INFO L125 PetriNetUnfolderBase]: For 566802/566802 co-relation queries the response was YES. [2023-08-04 09:43:51,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687214 conditions, 629527 events. 496655/629527 cut-off events. For 566802/566802 co-relation queries the response was YES. Maximal size of possible extension queue 11048. Compared 4019072 event pairs, 77342 based on Foata normal form. 6641/546287 useless extension candidates. Maximal degree in co-relation 1686759. Up to 441093 conditions per place. [2023-08-04 09:43:54,137 INFO L140 encePairwiseOnDemand]: 417/425 looper letters, 198 selfloop transitions, 17 changer transitions 3/229 dead transitions. [2023-08-04 09:43:54,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 229 transitions, 1579 flow [2023-08-04 09:43:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 09:43:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 09:43:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1243 transitions. [2023-08-04 09:43:54,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48745098039215684 [2023-08-04 09:43:54,139 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1243 transitions. [2023-08-04 09:43:54,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1243 transitions. [2023-08-04 09:43:54,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:43:54,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1243 transitions. [2023-08-04 09:43:54,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.16666666666666) internal successors, (1243), 6 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:43:54,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:43:54,144 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 425.0) internal successors, (2975), 7 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:43:54,144 INFO L175 Difference]: Start difference. First operand has 108 places, 95 transitions, 482 flow. Second operand 6 states and 1243 transitions. [2023-08-04 09:43:54,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 229 transitions, 1579 flow [2023-08-04 09:46:54,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 229 transitions, 1571 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:46:54,453 INFO L231 Difference]: Finished difference. Result has 115 places, 107 transitions, 617 flow [2023-08-04 09:46:54,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=617, PETRI_PLACES=115, PETRI_TRANSITIONS=107} [2023-08-04 09:46:54,453 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 50 predicate places. [2023-08-04 09:46:54,453 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 107 transitions, 617 flow [2023-08-04 09:46:54,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 184.83333333333334) internal successors, (1109), 6 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:54,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:46:54,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:46:54,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 09:46:54,454 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:46:54,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:46:54,454 INFO L85 PathProgramCache]: Analyzing trace with hash 506279836, now seen corresponding path program 1 times [2023-08-04 09:46:54,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:46:54,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833686112] [2023-08-04 09:46:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:46:54,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:46:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:46:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:46:54,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:46:54,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833686112] [2023-08-04 09:46:54,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833686112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:46:54,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:46:54,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:46:54,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055806938] [2023-08-04 09:46:54,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:46:54,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:46:54,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:46:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:46:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:46:54,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 425 [2023-08-04 09:46:54,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 107 transitions, 617 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:54,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:46:54,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 425 [2023-08-04 09:46:54,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand