/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-nonblocking-cntr-alt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:35:03,224 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:35:03,275 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:35:03,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:35:03,279 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:35:03,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:35:03,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:35:03,303 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:35:03,303 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:35:03,303 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:35:03,304 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:35:03,304 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:35:03,304 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:35:03,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:35:03,304 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:35:03,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:35:03,305 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:35:03,305 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:35:03,305 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:35:03,305 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:35:03,306 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:35:03,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:35:03,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:35:03,308 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:35:03,308 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:35:03,308 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:35:03,308 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:35:03,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:35:03,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:35:03,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:35:03,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:35:03,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:35:03,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:35:03,309 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:35:03,310 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:35:03,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:35:03,310 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:35:03,310 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:35:03,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:35:03,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:35:03,310 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:35:03,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:35:03,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:35:03,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:35:03,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:35:03,502 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:35:03,503 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:35:03,504 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr-alt.wvr_bound2.c [2023-08-04 09:35:04,432 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:35:04,582 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:35:04,582 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr-alt.wvr_bound2.c [2023-08-04 09:35:04,588 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2419be29/f76b372ba51b42a992124d218de2a161/FLAGc199dd3f4 [2023-08-04 09:35:04,601 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2419be29/f76b372ba51b42a992124d218de2a161 [2023-08-04 09:35:04,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:35:04,606 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:35:04,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:35:04,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:35:04,610 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:35:04,611 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e70d2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04, skipping insertion in model container [2023-08-04 09:35:04,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,628 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:35:04,750 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-nonblocking-cntr-alt.wvr_bound2.c[2260,2273] [2023-08-04 09:35:04,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:35:04,759 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:35:04,773 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-nonblocking-cntr-alt.wvr_bound2.c[2260,2273] [2023-08-04 09:35:04,774 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:35:04,779 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:35:04,779 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:35:04,783 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:35:04,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04 WrapperNode [2023-08-04 09:35:04,783 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:35:04,784 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:35:04,784 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:35:04,784 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:35:04,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,793 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,805 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2023-08-04 09:35:04,805 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:35:04,806 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:35:04,806 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:35:04,806 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:35:04,811 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,812 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,816 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,819 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,819 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,820 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,821 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:35:04,822 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:35:04,822 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:35:04,822 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:35:04,823 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (1/1) ... [2023-08-04 09:35:04,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:35:04,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:04,859 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 09:35:04,874 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 09:35:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:35:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:35:04,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:35:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:35:04,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:35:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:35:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:35:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:35:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:35:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:35:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:35:04,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:35:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:35:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:35:04,884 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 09:35:04,959 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:35:04,961 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:35:05,087 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:35:05,116 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:35:05,116 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 09:35:05,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:35:05 BoogieIcfgContainer [2023-08-04 09:35:05,121 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:35:05,122 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:35:05,123 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:35:05,124 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:35:05,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:35:04" (1/3) ... [2023-08-04 09:35:05,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32eb2b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:35:05, skipping insertion in model container [2023-08-04 09:35:05,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:35:04" (2/3) ... [2023-08-04 09:35:05,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32eb2b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:35:05, skipping insertion in model container [2023-08-04 09:35:05,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:35:05" (3/3) ... [2023-08-04 09:35:05,127 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-nonblocking-cntr-alt.wvr_bound2.c [2023-08-04 09:35:05,135 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:35:05,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:35:05,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:35:05,141 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:35:05,190 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:35:05,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:05,280 INFO L124 PetriNetUnfolderBase]: 33/248 cut-off events. [2023-08-04 09:35:05,280 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:35:05,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 248 events. 33/248 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 801 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-04 09:35:05,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:05,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:05,290 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:35:05,295 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:05,297 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:05,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:05,343 INFO L124 PetriNetUnfolderBase]: 33/248 cut-off events. [2023-08-04 09:35:05,343 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:35:05,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 248 events. 33/248 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 801 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-04 09:35:05,349 INFO L119 LiptonReduction]: Number of co-enabled transitions 2052 [2023-08-04 09:35:07,427 INFO L134 LiptonReduction]: Checked pairs total: 2558 [2023-08-04 09:35:07,427 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-04 09:35:07,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:35:07,441 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;@bdbb98f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:35:07,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:35:07,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:35:07,444 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 09:35:07,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:35:07,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:07,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 09:35:07,446 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:07,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:07,449 INFO L85 PathProgramCache]: Analyzing trace with hash 425217932, now seen corresponding path program 1 times [2023-08-04 09:35:07,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:07,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430387756] [2023-08-04 09:35:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:07,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:07,593 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 09:35:07,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:07,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430387756] [2023-08-04 09:35:07,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430387756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:07,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:35:07,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:35:07,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195216074] [2023-08-04 09:35:07,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:07,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:35:07,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:35:07,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:35:07,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 206 [2023-08-04 09:35:07,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:07,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:07,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 206 [2023-08-04 09:35:07,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:07,712 INFO L124 PetriNetUnfolderBase]: 260/420 cut-off events. [2023-08-04 09:35:07,712 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 09:35:07,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 420 events. 260/420 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1599 event pairs, 86 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 692. Up to 390 conditions per place. [2023-08-04 09:35:07,715 INFO L140 encePairwiseOnDemand]: 202/206 looper letters, 23 selfloop transitions, 2 changer transitions 3/32 dead transitions. [2023-08-04 09:35:07,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 138 flow [2023-08-04 09:35:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:35:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:35:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-08-04 09:35:07,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48220064724919093 [2023-08-04 09:35:07,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-08-04 09:35:07,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-08-04 09:35:07,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:07,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-08-04 09:35:07,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:07,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 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 09:35:07,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 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 09:35:07,733 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 82 flow. Second operand 3 states and 298 transitions. [2023-08-04 09:35:07,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 138 flow [2023-08-04 09:35:07,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:35:07,737 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 80 flow [2023-08-04 09:35:07,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-04 09:35:07,740 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-04 09:35:07,740 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 80 flow [2023-08-04 09:35:07,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:07,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:07,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:35:07,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:35:07,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:07,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:07,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1229886256, now seen corresponding path program 1 times [2023-08-04 09:35:07,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:07,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120646460] [2023-08-04 09:35:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:07,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:07,804 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 09:35:07,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:07,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120646460] [2023-08-04 09:35:07,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120646460] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:07,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499395081] [2023-08-04 09:35:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:07,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:07,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:07,807 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 09:35:07,811 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 09:35:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:07,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:35:07,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:07,883 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 09:35:07,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:35:07,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499395081] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:07,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:35:07,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:35:07,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143981556] [2023-08-04 09:35:07,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:07,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:35:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:35:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:35:07,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 206 [2023-08-04 09:35:07,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:07,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:07,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 206 [2023-08-04 09:35:07,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:07,950 INFO L124 PetriNetUnfolderBase]: 257/409 cut-off events. [2023-08-04 09:35:07,951 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-04 09:35:07,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 838 conditions, 409 events. 257/409 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1466 event pairs, 85 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 681. Up to 361 conditions per place. [2023-08-04 09:35:07,952 INFO L140 encePairwiseOnDemand]: 203/206 looper letters, 25 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-04 09:35:07,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 146 flow [2023-08-04 09:35:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:35:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:35:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-04 09:35:07,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48381877022653724 [2023-08-04 09:35:07,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-04 09:35:07,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-04 09:35:07,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:07,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-04 09:35:07,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:07,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 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 09:35:07,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 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 09:35:07,958 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 80 flow. Second operand 3 states and 299 transitions. [2023-08-04 09:35:07,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 146 flow [2023-08-04 09:35:07,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:35:07,959 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 78 flow [2023-08-04 09:35:07,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-08-04 09:35:07,960 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-04 09:35:07,960 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 78 flow [2023-08-04 09:35:07,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:07,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:07,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:35:07,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:35:08,165 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 09:35:08,166 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:08,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:08,166 INFO L85 PathProgramCache]: Analyzing trace with hash 98803563, now seen corresponding path program 1 times [2023-08-04 09:35:08,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:08,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181460118] [2023-08-04 09:35:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:08,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:08,215 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 09:35:08,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:08,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181460118] [2023-08-04 09:35:08,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181460118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:08,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848840666] [2023-08-04 09:35:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:08,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:08,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:08,217 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 09:35:08,220 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 09:35:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:08,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:35:08,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:08,265 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 09:35:08,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:35:08,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848840666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:08,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:35:08,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:35:08,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444756164] [2023-08-04 09:35:08,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:08,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:35:08,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:08,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:35:08,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:35:08,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 206 [2023-08-04 09:35:08,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:08,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:08,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 206 [2023-08-04 09:35:08,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:08,325 INFO L124 PetriNetUnfolderBase]: 171/284 cut-off events. [2023-08-04 09:35:08,325 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 09:35:08,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 284 events. 171/284 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 899 event pairs, 52 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 347. Up to 193 conditions per place. [2023-08-04 09:35:08,326 INFO L140 encePairwiseOnDemand]: 203/206 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-04 09:35:08,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 160 flow [2023-08-04 09:35:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:35:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:35:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-04 09:35:08,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4886731391585761 [2023-08-04 09:35:08,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-04 09:35:08,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-04 09:35:08,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:08,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-04 09:35:08,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:08,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 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 09:35:08,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 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 09:35:08,330 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 78 flow. Second operand 3 states and 302 transitions. [2023-08-04 09:35:08,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 160 flow [2023-08-04 09:35:08,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:35:08,331 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 86 flow [2023-08-04 09:35:08,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-04 09:35:08,332 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-08-04 09:35:08,332 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 86 flow [2023-08-04 09:35:08,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:08,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:08,332 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 09:35:08,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 09:35:08,545 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 09:35:08,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:08,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:08,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1322882689, now seen corresponding path program 1 times [2023-08-04 09:35:08,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:08,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511716759] [2023-08-04 09:35:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:08,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:08,622 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 09:35:08,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:08,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511716759] [2023-08-04 09:35:08,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511716759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:08,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353926946] [2023-08-04 09:35:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:08,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:08,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:08,624 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 09:35:08,626 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 09:35:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:08,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:35:08,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:08,688 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 09:35:08,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:35:08,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353926946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:08,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:35:08,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:35:08,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902305577] [2023-08-04 09:35:08,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:08,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:35:08,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:35:08,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:35:08,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 206 [2023-08-04 09:35:08,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:08,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:08,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 206 [2023-08-04 09:35:08,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:08,741 INFO L124 PetriNetUnfolderBase]: 162/271 cut-off events. [2023-08-04 09:35:08,741 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 09:35:08,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 271 events. 162/271 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 841 event pairs, 69 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 343. Up to 228 conditions per place. [2023-08-04 09:35:08,743 INFO L140 encePairwiseOnDemand]: 203/206 looper letters, 25 selfloop transitions, 2 changer transitions 2/33 dead transitions. [2023-08-04 09:35:08,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 154 flow [2023-08-04 09:35:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:35:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:35:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-04 09:35:08,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48381877022653724 [2023-08-04 09:35:08,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-04 09:35:08,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-04 09:35:08,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:08,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-04 09:35:08,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:08,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 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 09:35:08,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 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 09:35:08,753 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 86 flow. Second operand 3 states and 299 transitions. [2023-08-04 09:35:08,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 154 flow [2023-08-04 09:35:08,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:35:08,755 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 88 flow [2023-08-04 09:35:08,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-04 09:35:08,756 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-04 09:35:08,757 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 88 flow [2023-08-04 09:35:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:08,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:08,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:35:08,779 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 09:35:08,965 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 09:35:08,965 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:08,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1202183916, now seen corresponding path program 1 times [2023-08-04 09:35:08,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:08,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694502212] [2023-08-04 09:35:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:08,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:09,036 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 09:35:09,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694502212] [2023-08-04 09:35:09,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694502212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:09,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385651927] [2023-08-04 09:35:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:09,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:09,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:09,038 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 09:35:09,040 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 09:35:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:09,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:35:09,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:09,112 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 09:35:09,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:35:09,131 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 09:35:09,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385651927] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:35:09,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:35:09,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:35:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619499840] [2023-08-04 09:35:09,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:35:09,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:35:09,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:09,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:35:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:35:09,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 206 [2023-08-04 09:35:09,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:09,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:09,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 206 [2023-08-04 09:35:09,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:09,172 INFO L124 PetriNetUnfolderBase]: 8/19 cut-off events. [2023-08-04 09:35:09,172 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 09:35:09,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 19 events. 8/19 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 24 event pairs, 2 based on Foata normal form. 3/17 useless extension candidates. Maximal degree in co-relation 40. Up to 13 conditions per place. [2023-08-04 09:35:09,172 INFO L140 encePairwiseOnDemand]: 203/206 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 09:35:09,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 10 transitions, 42 flow [2023-08-04 09:35:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:35:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:35:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2023-08-04 09:35:09,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441747572815534 [2023-08-04 09:35:09,173 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2023-08-04 09:35:09,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2023-08-04 09:35:09,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:09,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2023-08-04 09:35:09,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:09,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:09,176 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:09,176 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 88 flow. Second operand 4 states and 366 transitions. [2023-08-04 09:35:09,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 10 transitions, 42 flow [2023-08-04 09:35:09,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 10 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:35:09,176 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-04 09:35:09,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2023-08-04 09:35:09,177 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -13 predicate places. [2023-08-04 09:35:09,177 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-04 09:35:09,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:09,179 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:35:09,186 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 09:35:09,383 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 09:35:09,384 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 09:35:09,385 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:35:09,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:09,398 INFO L124 PetriNetUnfolderBase]: 33/248 cut-off events. [2023-08-04 09:35:09,398 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:35:09,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 248 events. 33/248 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 801 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-04 09:35:09,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:09,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:09,399 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:35:09,399 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:09,399 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:09,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 244 flow [2023-08-04 09:35:09,409 INFO L124 PetriNetUnfolderBase]: 33/248 cut-off events. [2023-08-04 09:35:09,409 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:35:09,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 248 events. 33/248 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 801 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-04 09:35:09,411 INFO L119 LiptonReduction]: Number of co-enabled transitions 2052 [2023-08-04 09:35:11,157 INFO L134 LiptonReduction]: Checked pairs total: 2602 [2023-08-04 09:35:11,158 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-04 09:35:11,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:35:11,159 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;@bdbb98f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:35:11,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:35:11,161 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:35:11,161 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-08-04 09:35:11,161 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:35:11,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:11,161 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:35:11,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:35:11,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1161533427, now seen corresponding path program 1 times [2023-08-04 09:35:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:11,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038035239] [2023-08-04 09:35:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:11,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:35:11,191 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:35:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:35:11,213 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:35:11,213 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:35:11,213 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:35:11,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:35:11,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 09:35:11,214 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:35:11,214 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:35:11,214 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:35:11,214 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:35:11,229 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:35:11,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 134 transitions, 316 flow [2023-08-04 09:35:11,271 INFO L124 PetriNetUnfolderBase]: 134/811 cut-off events. [2023-08-04 09:35:11,271 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:35:11,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 811 events. 134/811 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4066 event pairs, 1 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 481. Up to 32 conditions per place. [2023-08-04 09:35:11,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 134 transitions, 316 flow [2023-08-04 09:35:11,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 134 transitions, 316 flow [2023-08-04 09:35:11,276 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:35:11,276 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 134 transitions, 316 flow [2023-08-04 09:35:11,276 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 134 transitions, 316 flow [2023-08-04 09:35:11,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 134 transitions, 316 flow [2023-08-04 09:35:11,315 INFO L124 PetriNetUnfolderBase]: 134/811 cut-off events. [2023-08-04 09:35:11,315 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:35:11,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 811 events. 134/811 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4066 event pairs, 1 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 481. Up to 32 conditions per place. [2023-08-04 09:35:11,324 INFO L119 LiptonReduction]: Number of co-enabled transitions 5028 [2023-08-04 09:35:13,432 INFO L134 LiptonReduction]: Checked pairs total: 7687 [2023-08-04 09:35:13,433 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-08-04 09:35:13,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:35:13,434 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;@bdbb98f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:35:13,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:35:13,436 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:35:13,436 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 09:35:13,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:35:13,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:13,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 09:35:13,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:13,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash 763697181, now seen corresponding path program 1 times [2023-08-04 09:35:13,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:13,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751963769] [2023-08-04 09:35:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:13,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:13,475 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 09:35:13,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:13,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751963769] [2023-08-04 09:35:13,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751963769] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:13,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:35:13,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:35:13,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220357641] [2023-08-04 09:35:13,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:13,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:35:13,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:13,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:35:13,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:35:13,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 239 [2023-08-04 09:35:13,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:13,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:13,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 239 [2023-08-04 09:35:13,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:14,154 INFO L124 PetriNetUnfolderBase]: 8526/11037 cut-off events. [2023-08-04 09:35:14,155 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2023-08-04 09:35:14,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22380 conditions, 11037 events. 8526/11037 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 47470 event pairs, 3472 based on Foata normal form. 0/6248 useless extension candidates. Maximal degree in co-relation 6836. Up to 10600 conditions per place. [2023-08-04 09:35:14,207 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 35 selfloop transitions, 2 changer transitions 2/47 dead transitions. [2023-08-04 09:35:14,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 216 flow [2023-08-04 09:35:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:35:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:35:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-04 09:35:14,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48535564853556484 [2023-08-04 09:35:14,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-04 09:35:14,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-04 09:35:14,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:14,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-04 09:35:14,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:14,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:14,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:14,211 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 348 transitions. [2023-08-04 09:35:14,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 216 flow [2023-08-04 09:35:14,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:35:14,214 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 134 flow [2023-08-04 09:35:14,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-04 09:35:14,215 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 09:35:14,215 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 134 flow [2023-08-04 09:35:14,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:14,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:14,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:35:14,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:35:14,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:14,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1995274203, now seen corresponding path program 1 times [2023-08-04 09:35:14,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:14,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144451318] [2023-08-04 09:35:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:14,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:14,257 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 09:35:14,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:14,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144451318] [2023-08-04 09:35:14,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144451318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:14,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458706442] [2023-08-04 09:35:14,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:14,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:14,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:14,261 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 09:35:14,287 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 09:35:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:14,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:35:14,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:14,328 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 09:35:14,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:35:14,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458706442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:14,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:35:14,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:35:14,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910727295] [2023-08-04 09:35:14,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:14,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:35:14,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:14,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:35:14,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:35:14,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 239 [2023-08-04 09:35:14,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:14,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:14,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 239 [2023-08-04 09:35:14,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:14,903 INFO L124 PetriNetUnfolderBase]: 8488/11014 cut-off events. [2023-08-04 09:35:14,903 INFO L125 PetriNetUnfolderBase]: For 859/859 co-relation queries the response was YES. [2023-08-04 09:35:14,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22260 conditions, 11014 events. 8488/11014 cut-off events. For 859/859 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 49338 event pairs, 3438 based on Foata normal form. 0/6262 useless extension candidates. Maximal degree in co-relation 22230. Up to 10389 conditions per place. [2023-08-04 09:35:14,946 INFO L140 encePairwiseOnDemand]: 236/239 looper letters, 40 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 09:35:14,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 234 flow [2023-08-04 09:35:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:35:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:35:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-04 09:35:14,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895397489539749 [2023-08-04 09:35:14,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-04 09:35:14,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-04 09:35:14,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:14,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-04 09:35:14,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:14,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:14,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:14,950 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 134 flow. Second operand 3 states and 351 transitions. [2023-08-04 09:35:14,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 234 flow [2023-08-04 09:35:14,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:35:14,954 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 138 flow [2023-08-04 09:35:14,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=41, PETRI_TRANSITIONS=43} [2023-08-04 09:35:14,955 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2023-08-04 09:35:14,955 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 138 flow [2023-08-04 09:35:14,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:14,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:14,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:35:14,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:35:15,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:15,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:15,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1360172496, now seen corresponding path program 1 times [2023-08-04 09:35:15,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:15,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782389922] [2023-08-04 09:35:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:15,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:15,188 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 09:35:15,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:15,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782389922] [2023-08-04 09:35:15,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782389922] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:15,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048139400] [2023-08-04 09:35:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:15,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:15,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:15,194 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 09:35:15,213 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 09:35:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:15,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:35:15,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:15,267 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 09:35:15,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:35:15,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048139400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:15,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:35:15,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:35:15,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154329869] [2023-08-04 09:35:15,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:15,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:35:15,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:35:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:35:15,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 239 [2023-08-04 09:35:15,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:15,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:15,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 239 [2023-08-04 09:35:15,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:15,851 INFO L124 PetriNetUnfolderBase]: 7283/9572 cut-off events. [2023-08-04 09:35:15,851 INFO L125 PetriNetUnfolderBase]: For 617/617 co-relation queries the response was YES. [2023-08-04 09:35:15,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19645 conditions, 9572 events. 7283/9572 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 43080 event pairs, 2490 based on Foata normal form. 0/5673 useless extension candidates. Maximal degree in co-relation 6727. Up to 6828 conditions per place. [2023-08-04 09:35:15,898 INFO L140 encePairwiseOnDemand]: 236/239 looper letters, 47 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 09:35:15,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 57 transitions, 274 flow [2023-08-04 09:35:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:35:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:35:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-04 09:35:15,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.497907949790795 [2023-08-04 09:35:15,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-04 09:35:15,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-04 09:35:15,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:15,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-04 09:35:15,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:15,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:15,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:15,903 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 138 flow. Second operand 3 states and 357 transitions. [2023-08-04 09:35:15,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 57 transitions, 274 flow [2023-08-04 09:35:15,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:35:15,906 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 148 flow [2023-08-04 09:35:15,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-04 09:35:15,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 09:35:15,909 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 148 flow [2023-08-04 09:35:15,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:15,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:15,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:35:15,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 09:35:16,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:16,117 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:16,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1855247106, now seen corresponding path program 1 times [2023-08-04 09:35:16,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:16,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447669027] [2023-08-04 09:35:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:16,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:16,150 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 09:35:16,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:16,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447669027] [2023-08-04 09:35:16,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447669027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:16,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717318522] [2023-08-04 09:35:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:16,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:16,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:16,152 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 09:35:16,154 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 09:35:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:16,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:35:16,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:16,214 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 09:35:16,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:35:16,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717318522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:16,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:35:16,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:35:16,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15866503] [2023-08-04 09:35:16,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:16,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:35:16,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:16,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:35:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:35:16,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 239 [2023-08-04 09:35:16,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:16,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:16,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 239 [2023-08-04 09:35:16,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:16,784 INFO L124 PetriNetUnfolderBase]: 7160/9501 cut-off events. [2023-08-04 09:35:16,784 INFO L125 PetriNetUnfolderBase]: For 1501/1501 co-relation queries the response was YES. [2023-08-04 09:35:16,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20205 conditions, 9501 events. 7160/9501 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 42910 event pairs, 2789 based on Foata normal form. 0/5933 useless extension candidates. Maximal degree in co-relation 7255. Up to 7262 conditions per place. [2023-08-04 09:35:16,815 INFO L140 encePairwiseOnDemand]: 236/239 looper letters, 48 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 09:35:16,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 286 flow [2023-08-04 09:35:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:35:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:35:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-04 09:35:16,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.497907949790795 [2023-08-04 09:35:16,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-04 09:35:16,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-04 09:35:16,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:16,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-04 09:35:16,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:16,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:16,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:16,818 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 148 flow. Second operand 3 states and 357 transitions. [2023-08-04 09:35:16,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 286 flow [2023-08-04 09:35:16,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:35:16,825 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 158 flow [2023-08-04 09:35:16,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-04 09:35:16,826 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-04 09:35:16,826 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 158 flow [2023-08-04 09:35:16,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:16,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:16,826 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 09:35:16,832 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 09:35:17,030 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 09:35:17,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:17,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:17,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1953587779, now seen corresponding path program 1 times [2023-08-04 09:35:17,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:17,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904140466] [2023-08-04 09:35:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:17,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:17,067 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 09:35:17,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:17,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904140466] [2023-08-04 09:35:17,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904140466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:17,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423632159] [2023-08-04 09:35:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:17,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:17,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:17,081 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 09:35:17,085 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 09:35:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:17,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:35:17,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:17,146 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 09:35:17,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:35:17,158 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 09:35:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423632159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:35:17,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:35:17,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 09:35:17,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11661479] [2023-08-04 09:35:17,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:35:17,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:35:17,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:35:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:35:17,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 239 [2023-08-04 09:35:17,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:17,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:17,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 239 [2023-08-04 09:35:17,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:17,577 INFO L124 PetriNetUnfolderBase]: 6453/8554 cut-off events. [2023-08-04 09:35:17,577 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-08-04 09:35:17,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18389 conditions, 8554 events. 6453/8554 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 38213 event pairs, 1919 based on Foata normal form. 3/5405 useless extension candidates. Maximal degree in co-relation 12362. Up to 8125 conditions per place. [2023-08-04 09:35:17,605 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 41 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 09:35:17,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 264 flow [2023-08-04 09:35:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:35:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:35:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 451 transitions. [2023-08-04 09:35:17,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47175732217573224 [2023-08-04 09:35:17,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 451 transitions. [2023-08-04 09:35:17,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 451 transitions. [2023-08-04 09:35:17,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:17,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 451 transitions. [2023-08-04 09:35:17,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:17,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:17,626 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:17,627 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 158 flow. Second operand 4 states and 451 transitions. [2023-08-04 09:35:17,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 264 flow [2023-08-04 09:35:17,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:35:17,648 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 170 flow [2023-08-04 09:35:17,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-04 09:35:17,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2023-08-04 09:35:17,650 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 170 flow [2023-08-04 09:35:17,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:17,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:17,650 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] [2023-08-04 09:35:17,669 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 09:35:17,855 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 09:35:17,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:17,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:17,856 INFO L85 PathProgramCache]: Analyzing trace with hash 628494234, now seen corresponding path program 1 times [2023-08-04 09:35:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:17,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155916182] [2023-08-04 09:35:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:17,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:35:17,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:17,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155916182] [2023-08-04 09:35:17,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155916182] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:17,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360948049] [2023-08-04 09:35:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:17,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:17,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:17,917 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 09:35:17,919 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 09:35:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:17,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:35:17,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:35:17,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:35:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:35:17,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360948049] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:35:17,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:35:17,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:35:17,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809454387] [2023-08-04 09:35:17,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:35:17,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:35:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:17,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:35:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:35:18,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 239 [2023-08-04 09:35:18,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:18,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:18,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 239 [2023-08-04 09:35:18,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:18,432 INFO L124 PetriNetUnfolderBase]: 6114/8098 cut-off events. [2023-08-04 09:35:18,432 INFO L125 PetriNetUnfolderBase]: For 795/795 co-relation queries the response was YES. [2023-08-04 09:35:18,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17359 conditions, 8098 events. 6114/8098 cut-off events. For 795/795 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 36723 event pairs, 1699 based on Foata normal form. 27/5129 useless extension candidates. Maximal degree in co-relation 11398. Up to 6552 conditions per place. [2023-08-04 09:35:18,457 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 49 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2023-08-04 09:35:18,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 308 flow [2023-08-04 09:35:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:35:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:35:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 459 transitions. [2023-08-04 09:35:18,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801255230125523 [2023-08-04 09:35:18,459 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 459 transitions. [2023-08-04 09:35:18,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 459 transitions. [2023-08-04 09:35:18,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:18,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 459 transitions. [2023-08-04 09:35:18,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:18,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:18,462 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:18,462 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 170 flow. Second operand 4 states and 459 transitions. [2023-08-04 09:35:18,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 308 flow [2023-08-04 09:35:18,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 299 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:35:18,471 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 175 flow [2023-08-04 09:35:18,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-08-04 09:35:18,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-04 09:35:18,472 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 175 flow [2023-08-04 09:35:18,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:18,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:18,473 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] [2023-08-04 09:35:18,481 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 09:35:18,677 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 09:35:18,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:18,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:18,677 INFO L85 PathProgramCache]: Analyzing trace with hash -423314834, now seen corresponding path program 1 times [2023-08-04 09:35:18,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:18,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972816950] [2023-08-04 09:35:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:18,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:35:18,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:18,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972816950] [2023-08-04 09:35:18,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972816950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:18,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491747945] [2023-08-04 09:35:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:18,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:18,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:18,737 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 09:35:18,751 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 09:35:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:18,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:35:18,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:35:18,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:35:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:35:18,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491747945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:35:18,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:35:18,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:35:18,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468133203] [2023-08-04 09:35:18,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:35:18,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:35:18,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:35:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:35:18,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 239 [2023-08-04 09:35:18,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:18,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:18,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 239 [2023-08-04 09:35:18,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:19,125 INFO L124 PetriNetUnfolderBase]: 4136/5529 cut-off events. [2023-08-04 09:35:19,125 INFO L125 PetriNetUnfolderBase]: For 1273/1273 co-relation queries the response was YES. [2023-08-04 09:35:19,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11980 conditions, 5529 events. 4136/5529 cut-off events. For 1273/1273 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22885 event pairs, 747 based on Foata normal form. 108/3585 useless extension candidates. Maximal degree in co-relation 10556. Up to 2080 conditions per place. [2023-08-04 09:35:19,143 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-04 09:35:19,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 67 transitions, 346 flow [2023-08-04 09:35:19,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:35:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:35:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 465 transitions. [2023-08-04 09:35:19,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48640167364016734 [2023-08-04 09:35:19,145 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 465 transitions. [2023-08-04 09:35:19,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 465 transitions. [2023-08-04 09:35:19,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:19,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 465 transitions. [2023-08-04 09:35:19,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:19,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:19,147 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:19,147 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 175 flow. Second operand 4 states and 465 transitions. [2023-08-04 09:35:19,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 67 transitions, 346 flow [2023-08-04 09:35:19,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 336 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:35:19,153 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 186 flow [2023-08-04 09:35:19,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-04 09:35:19,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-04 09:35:19,153 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 186 flow [2023-08-04 09:35:19,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:19,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:19,154 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] [2023-08-04 09:35:19,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 09:35:19,357 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 09:35:19,358 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:19,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash 988350557, now seen corresponding path program 1 times [2023-08-04 09:35:19,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:19,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392801693] [2023-08-04 09:35:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:19,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:35:19,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:19,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392801693] [2023-08-04 09:35:19,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392801693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:19,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758907327] [2023-08-04 09:35:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:19,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:19,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:19,417 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 09:35:19,421 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 09:35:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:19,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:35:19,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:35:19,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:35:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:35:19,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758907327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:35:19,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:35:19,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:35:19,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387863402] [2023-08-04 09:35:19,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:35:19,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:35:19,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:19,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:35:19,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:35:19,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 239 [2023-08-04 09:35:19,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:19,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:19,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 239 [2023-08-04 09:35:19,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:19,886 INFO L124 PetriNetUnfolderBase]: 4120/5502 cut-off events. [2023-08-04 09:35:19,887 INFO L125 PetriNetUnfolderBase]: For 2154/2154 co-relation queries the response was YES. [2023-08-04 09:35:19,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12516 conditions, 5502 events. 4120/5502 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22710 event pairs, 1861 based on Foata normal form. 13/3471 useless extension candidates. Maximal degree in co-relation 11102. Up to 4661 conditions per place. [2023-08-04 09:35:19,911 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 55 selfloop transitions, 3 changer transitions 2/68 dead transitions. [2023-08-04 09:35:19,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 358 flow [2023-08-04 09:35:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:35:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:35:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 465 transitions. [2023-08-04 09:35:19,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48640167364016734 [2023-08-04 09:35:19,913 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 465 transitions. [2023-08-04 09:35:19,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 465 transitions. [2023-08-04 09:35:19,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:19,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 465 transitions. [2023-08-04 09:35:19,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:19,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:19,917 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:19,917 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 186 flow. Second operand 4 states and 465 transitions. [2023-08-04 09:35:19,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 358 flow [2023-08-04 09:35:19,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:35:19,928 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 190 flow [2023-08-04 09:35:19,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-04 09:35:19,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-04 09:35:19,929 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 190 flow [2023-08-04 09:35:19,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:19,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:19,929 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] [2023-08-04 09:35:19,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 09:35:20,133 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 09:35:20,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:20,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:20,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1708731774, now seen corresponding path program 1 times [2023-08-04 09:35:20,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:20,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628590472] [2023-08-04 09:35:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:35:20,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:20,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628590472] [2023-08-04 09:35:20,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628590472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:20,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:35:20,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:35:20,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471591261] [2023-08-04 09:35:20,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:20,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:35:20,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:20,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:35:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:35:20,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 239 [2023-08-04 09:35:20,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:20,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:20,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 239 [2023-08-04 09:35:20,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:20,591 INFO L124 PetriNetUnfolderBase]: 4648/6201 cut-off events. [2023-08-04 09:35:20,591 INFO L125 PetriNetUnfolderBase]: For 2316/2316 co-relation queries the response was YES. [2023-08-04 09:35:20,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14123 conditions, 6201 events. 4648/6201 cut-off events. For 2316/2316 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 26315 event pairs, 1287 based on Foata normal form. 0/4133 useless extension candidates. Maximal degree in co-relation 13934. Up to 4615 conditions per place. [2023-08-04 09:35:20,613 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 65 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-08-04 09:35:20,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 464 flow [2023-08-04 09:35:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:35:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:35:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-04 09:35:20,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4916317991631799 [2023-08-04 09:35:20,614 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-04 09:35:20,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-04 09:35:20,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:20,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-04 09:35:20,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:20,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:20,617 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:20,617 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 190 flow. Second operand 4 states and 470 transitions. [2023-08-04 09:35:20,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 464 flow [2023-08-04 09:35:20,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 75 transitions, 451 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:35:20,630 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 196 flow [2023-08-04 09:35:20,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2023-08-04 09:35:20,630 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2023-08-04 09:35:20,630 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 196 flow [2023-08-04 09:35:20,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:20,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:20,631 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] [2023-08-04 09:35:20,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 09:35:20,631 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:20,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:20,631 INFO L85 PathProgramCache]: Analyzing trace with hash 224472378, now seen corresponding path program 1 times [2023-08-04 09:35:20,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:20,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621929268] [2023-08-04 09:35:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:20,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:35:20,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:20,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621929268] [2023-08-04 09:35:20,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621929268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:20,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:35:20,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 09:35:20,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815659564] [2023-08-04 09:35:20,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:20,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:35:20,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:35:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:35:20,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 239 [2023-08-04 09:35:20,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:20,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:20,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 239 [2023-08-04 09:35:20,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:21,117 INFO L124 PetriNetUnfolderBase]: 4904/6632 cut-off events. [2023-08-04 09:35:21,117 INFO L125 PetriNetUnfolderBase]: For 3649/3649 co-relation queries the response was YES. [2023-08-04 09:35:21,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16621 conditions, 6632 events. 4904/6632 cut-off events. For 3649/3649 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 29879 event pairs, 1913 based on Foata normal form. 125/4756 useless extension candidates. Maximal degree in co-relation 16421. Up to 4443 conditions per place. [2023-08-04 09:35:21,136 INFO L140 encePairwiseOnDemand]: 234/239 looper letters, 86 selfloop transitions, 5 changer transitions 25/122 dead transitions. [2023-08-04 09:35:21,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 122 transitions, 774 flow [2023-08-04 09:35:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:35:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:35:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 596 transitions. [2023-08-04 09:35:21,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49874476987447697 [2023-08-04 09:35:21,138 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 596 transitions. [2023-08-04 09:35:21,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 596 transitions. [2023-08-04 09:35:21,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:21,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 596 transitions. [2023-08-04 09:35:21,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.2) internal successors, (596), 5 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:21,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:21,140 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:21,140 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 196 flow. Second operand 5 states and 596 transitions. [2023-08-04 09:35:21,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 122 transitions, 774 flow [2023-08-04 09:35:21,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 122 transitions, 765 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 09:35:21,150 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 219 flow [2023-08-04 09:35:21,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2023-08-04 09:35:21,150 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2023-08-04 09:35:21,150 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 219 flow [2023-08-04 09:35:21,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:21,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:21,151 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] [2023-08-04 09:35:21,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 09:35:21,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:21,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:21,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1837734546, now seen corresponding path program 2 times [2023-08-04 09:35:21,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:21,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327291082] [2023-08-04 09:35:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:21,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:35:21,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:21,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327291082] [2023-08-04 09:35:21,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327291082] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:21,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736665570] [2023-08-04 09:35:21,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 09:35:21,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:21,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:21,194 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 09:35:21,196 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 09:35:21,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 09:35:21,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:35:21,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 09:35:21,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:35:21,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:35:21,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736665570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:21,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:35:21,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-08-04 09:35:21,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107899067] [2023-08-04 09:35:21,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:21,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:35:21,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:35:21,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:35:21,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 239 [2023-08-04 09:35:21,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:21,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:21,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 239 [2023-08-04 09:35:21,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:21,658 INFO L124 PetriNetUnfolderBase]: 5319/7205 cut-off events. [2023-08-04 09:35:21,659 INFO L125 PetriNetUnfolderBase]: For 4255/4516 co-relation queries the response was YES. [2023-08-04 09:35:21,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19732 conditions, 7205 events. 5319/7205 cut-off events. For 4255/4516 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 32447 event pairs, 2022 based on Foata normal form. 261/5415 useless extension candidates. Maximal degree in co-relation 19516. Up to 5288 conditions per place. [2023-08-04 09:35:21,689 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 65 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2023-08-04 09:35:21,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 492 flow [2023-08-04 09:35:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:35:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:35:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2023-08-04 09:35:21,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895397489539749 [2023-08-04 09:35:21,690 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2023-08-04 09:35:21,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2023-08-04 09:35:21,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:21,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2023-08-04 09:35:21,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:21,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:21,693 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:21,693 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 219 flow. Second operand 4 states and 468 transitions. [2023-08-04 09:35:21,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 492 flow [2023-08-04 09:35:21,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 482 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 09:35:21,708 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 233 flow [2023-08-04 09:35:21,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2023-08-04 09:35:21,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2023-08-04 09:35:21,708 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 233 flow [2023-08-04 09:35:21,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:21,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:21,709 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] [2023-08-04 09:35:21,713 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 09:35:21,910 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,SelfDestructingSolverStorable16 [2023-08-04 09:35:21,911 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:21,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:21,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1839784253, now seen corresponding path program 1 times [2023-08-04 09:35:21,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:21,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314974175] [2023-08-04 09:35:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:21,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:35:22,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:22,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314974175] [2023-08-04 09:35:22,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314974175] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:35:22,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:35:22,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:35:22,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559695446] [2023-08-04 09:35:22,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:35:22,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:35:22,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:35:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:35:22,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 239 [2023-08-04 09:35:22,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 233 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:22,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:22,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 239 [2023-08-04 09:35:22,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:22,424 INFO L124 PetriNetUnfolderBase]: 5632/7703 cut-off events. [2023-08-04 09:35:22,424 INFO L125 PetriNetUnfolderBase]: For 5825/6917 co-relation queries the response was YES. [2023-08-04 09:35:22,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22107 conditions, 7703 events. 5632/7703 cut-off events. For 5825/6917 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 35605 event pairs, 2347 based on Foata normal form. 412/6116 useless extension candidates. Maximal degree in co-relation 21885. Up to 5803 conditions per place. [2023-08-04 09:35:22,454 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 67 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-08-04 09:35:22,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 504 flow [2023-08-04 09:35:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:35:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:35:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-08-04 09:35:22,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905857740585774 [2023-08-04 09:35:22,457 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-08-04 09:35:22,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-08-04 09:35:22,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:22,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-08-04 09:35:22,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:22,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:22,459 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:22,459 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 233 flow. Second operand 4 states and 469 transitions. [2023-08-04 09:35:22,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 504 flow [2023-08-04 09:35:22,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 484 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-04 09:35:22,472 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 235 flow [2023-08-04 09:35:22,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-04 09:35:22,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2023-08-04 09:35:22,472 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 235 flow [2023-08-04 09:35:22,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:22,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:22,473 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] [2023-08-04 09:35:22,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 09:35:22,473 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:22,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1841444197, now seen corresponding path program 1 times [2023-08-04 09:35:22,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:22,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208282525] [2023-08-04 09:35:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:22,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:35:22,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:22,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208282525] [2023-08-04 09:35:22,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208282525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:22,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39535565] [2023-08-04 09:35:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:22,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:22,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:22,535 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 09:35:22,537 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 09:35:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:22,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 09:35:22,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:35:22,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:35:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:35:22,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39535565] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:35:22,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:35:22,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 09:35:22,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620562584] [2023-08-04 09:35:22,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:35:22,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 09:35:22,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:22,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 09:35:22,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-04 09:35:22,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 239 [2023-08-04 09:35:22,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 235 flow. Second operand has 8 states, 8 states have (on average 103.625) internal successors, (829), 8 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:22,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:22,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 239 [2023-08-04 09:35:22,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:23,257 INFO L124 PetriNetUnfolderBase]: 6737/9081 cut-off events. [2023-08-04 09:35:23,258 INFO L125 PetriNetUnfolderBase]: For 7568/8726 co-relation queries the response was YES. [2023-08-04 09:35:23,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26967 conditions, 9081 events. 6737/9081 cut-off events. For 7568/8726 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 41880 event pairs, 479 based on Foata normal form. 516/7630 useless extension candidates. Maximal degree in co-relation 26735. Up to 4388 conditions per place. [2023-08-04 09:35:23,284 INFO L140 encePairwiseOnDemand]: 233/239 looper letters, 152 selfloop transitions, 11 changer transitions 0/170 dead transitions. [2023-08-04 09:35:23,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 170 transitions, 1101 flow [2023-08-04 09:35:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 09:35:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 09:35:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 923 transitions. [2023-08-04 09:35:23,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827405857740586 [2023-08-04 09:35:23,286 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 923 transitions. [2023-08-04 09:35:23,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 923 transitions. [2023-08-04 09:35:23,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:23,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 923 transitions. [2023-08-04 09:35:23,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 115.375) internal successors, (923), 8 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:23,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 239.0) internal successors, (2151), 9 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:23,290 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 239.0) internal successors, (2151), 9 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:23,290 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 235 flow. Second operand 8 states and 923 transitions. [2023-08-04 09:35:23,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 170 transitions, 1101 flow [2023-08-04 09:35:23,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 170 transitions, 1091 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 09:35:23,300 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 289 flow [2023-08-04 09:35:23,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=289, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2023-08-04 09:35:23,301 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2023-08-04 09:35:23,301 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 289 flow [2023-08-04 09:35:23,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 103.625) internal successors, (829), 8 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:23,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:23,301 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] [2023-08-04 09:35:23,306 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 09:35:23,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:23,505 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:23,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:23,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1784137311, now seen corresponding path program 1 times [2023-08-04 09:35:23,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:23,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124668127] [2023-08-04 09:35:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:23,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:35:23,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:23,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124668127] [2023-08-04 09:35:23,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124668127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:23,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408464712] [2023-08-04 09:35:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:23,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:23,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:23,852 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 09:35:23,855 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 09:35:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:23,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-04 09:35:23,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:35:24,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:35:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:35:24,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408464712] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:35:24,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:35:24,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2023-08-04 09:35:24,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893432939] [2023-08-04 09:35:24,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:35:24,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-04 09:35:24,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-04 09:35:24,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2023-08-04 09:35:25,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 239 [2023-08-04 09:35:25,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 289 flow. Second operand has 33 states, 33 states have (on average 90.48484848484848) internal successors, (2986), 33 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:25,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:25,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 239 [2023-08-04 09:35:25,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:39,096 INFO L124 PetriNetUnfolderBase]: 63431/88639 cut-off events. [2023-08-04 09:35:39,097 INFO L125 PetriNetUnfolderBase]: For 112220/112220 co-relation queries the response was YES. [2023-08-04 09:35:39,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301991 conditions, 88639 events. 63431/88639 cut-off events. For 112220/112220 co-relation queries the response was YES. Maximal size of possible extension queue 1949. Compared 577482 event pairs, 2283 based on Foata normal form. 7/68862 useless extension candidates. Maximal degree in co-relation 296557. Up to 21101 conditions per place. [2023-08-04 09:35:39,609 INFO L140 encePairwiseOnDemand]: 226/239 looper letters, 1820 selfloop transitions, 449 changer transitions 53/2326 dead transitions. [2023-08-04 09:35:39,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 2326 transitions, 16510 flow [2023-08-04 09:35:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-08-04 09:35:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-08-04 09:35:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 10432 transitions. [2023-08-04 09:35:39,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45467224546722457 [2023-08-04 09:35:39,623 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 10432 transitions. [2023-08-04 09:35:39,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 10432 transitions. [2023-08-04 09:35:39,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:39,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 10432 transitions. [2023-08-04 09:35:39,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 108.66666666666667) internal successors, (10432), 96 states have internal predecessors, (10432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:39,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 239.0) internal successors, (23183), 97 states have internal predecessors, (23183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:39,660 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 239.0) internal successors, (23183), 97 states have internal predecessors, (23183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:39,660 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 289 flow. Second operand 96 states and 10432 transitions. [2023-08-04 09:35:39,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 2326 transitions, 16510 flow [2023-08-04 09:35:40,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 2326 transitions, 16259 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-08-04 09:35:40,700 INFO L231 Difference]: Finished difference. Result has 221 places, 551 transitions, 4207 flow [2023-08-04 09:35:40,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=4207, PETRI_PLACES=221, PETRI_TRANSITIONS=551} [2023-08-04 09:35:40,700 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2023-08-04 09:35:40,700 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 551 transitions, 4207 flow [2023-08-04 09:35:40,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 90.48484848484848) internal successors, (2986), 33 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:40,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:35:40,702 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] [2023-08-04 09:35:40,707 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 09:35:40,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:40,902 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:35:40,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:35:40,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1421050793, now seen corresponding path program 1 times [2023-08-04 09:35:40,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:35:40,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724022527] [2023-08-04 09:35:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:40,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:35:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:35:41,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:35:41,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724022527] [2023-08-04 09:35:41,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724022527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:35:41,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172075125] [2023-08-04 09:35:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:35:41,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:35:41,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:35:41,073 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 09:35:41,074 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 09:35:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:35:41,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 09:35:41,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:35:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:35:41,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:35:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 09:35:41,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172075125] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:35:41,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:35:41,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2023-08-04 09:35:41,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678788965] [2023-08-04 09:35:41,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:35:41,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 09:35:41,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:35:41,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 09:35:41,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:35:41,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 239 [2023-08-04 09:35:41,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 551 transitions, 4207 flow. Second operand has 6 states, 6 states have (on average 106.66666666666667) internal successors, (640), 6 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 09:35:41,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:35:41,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 239 [2023-08-04 09:35:41,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:53,721 INFO L124 PetriNetUnfolderBase]: 60315/86935 cut-off events. [2023-08-04 09:35:53,721 INFO L125 PetriNetUnfolderBase]: For 1751681/1757406 co-relation queries the response was YES. [2023-08-04 09:35:54,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486637 conditions, 86935 events. 60315/86935 cut-off events. For 1751681/1757406 co-relation queries the response was YES. Maximal size of possible extension queue 2076. Compared 597122 event pairs, 19733 based on Foata normal form. 6263/91989 useless extension candidates. Maximal degree in co-relation 485391. Up to 75235 conditions per place. [2023-08-04 09:35:55,038 INFO L140 encePairwiseOnDemand]: 233/239 looper letters, 629 selfloop transitions, 82 changer transitions 0/747 dead transitions. [2023-08-04 09:35:55,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 747 transitions, 7072 flow [2023-08-04 09:35:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 09:35:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 09:35:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 699 transitions. [2023-08-04 09:35:55,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4874476987447699 [2023-08-04 09:35:55,040 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 699 transitions. [2023-08-04 09:35:55,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 699 transitions. [2023-08-04 09:35:55,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:35:55,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 699 transitions. [2023-08-04 09:35:55,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.5) internal successors, (699), 6 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:55,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 239.0) internal successors, (1673), 7 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:55,042 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 239.0) internal successors, (1673), 7 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:35:55,042 INFO L175 Difference]: Start difference. First operand has 221 places, 551 transitions, 4207 flow. Second operand 6 states and 699 transitions. [2023-08-04 09:35:55,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 747 transitions, 7072 flow [2023-08-04 09:36:06,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 747 transitions, 6624 flow, removed 203 selfloop flow, removed 2 redundant places. [2023-08-04 09:36:06,107 INFO L231 Difference]: Finished difference. Result has 227 places, 605 transitions, 4612 flow [2023-08-04 09:36:06,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=3861, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4612, PETRI_PLACES=227, PETRI_TRANSITIONS=605} [2023-08-04 09:36:06,107 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2023-08-04 09:36:06,107 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 605 transitions, 4612 flow [2023-08-04 09:36:06,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.66666666666667) internal successors, (640), 6 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 09:36:06,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:06,108 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] [2023-08-04 09:36:06,114 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 09:36:06,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:06,312 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:06,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:06,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1922853337, now seen corresponding path program 2 times [2023-08-04 09:36:06,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:06,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601950471] [2023-08-04 09:36:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:06,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:36:06,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:06,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601950471] [2023-08-04 09:36:06,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601950471] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:06,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257245741] [2023-08-04 09:36:06,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 09:36:06,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:06,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:06,596 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 09:36:06,598 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 09:36:06,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 09:36:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:36:06,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 09:36:06,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:36:07,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:36:08,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257245741] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:08,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:08,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-08-04 09:36:08,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469991004] [2023-08-04 09:36:08,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:08,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-04 09:36:08,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-04 09:36:08,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2023-08-04 09:36:08,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 239 [2023-08-04 09:36:08,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 605 transitions, 4612 flow. Second operand has 29 states, 29 states have (on average 95.17241379310344) internal successors, (2760), 29 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:08,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:08,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 239 [2023-08-04 09:36:08,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:50,961 INFO L124 PetriNetUnfolderBase]: 152896/218338 cut-off events. [2023-08-04 09:36:50,962 INFO L125 PetriNetUnfolderBase]: For 4031413/4041939 co-relation queries the response was YES. [2023-08-04 09:36:53,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258739 conditions, 218338 events. 152896/218338 cut-off events. For 4031413/4041939 co-relation queries the response was YES. Maximal size of possible extension queue 5483. Compared 1660035 event pairs, 23628 based on Foata normal form. 11081/228911 useless extension candidates. Maximal degree in co-relation 1257121. Up to 98238 conditions per place. [2023-08-04 09:36:54,404 INFO L140 encePairwiseOnDemand]: 226/239 looper letters, 2319 selfloop transitions, 1316 changer transitions 82/3725 dead transitions. [2023-08-04 09:36:54,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 3725 transitions, 35875 flow [2023-08-04 09:36:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-08-04 09:36:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2023-08-04 09:36:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 12609 transitions. [2023-08-04 09:36:54,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587593232672367 [2023-08-04 09:36:54,413 INFO L72 ComplementDD]: Start complementDD. Operand 115 states and 12609 transitions. [2023-08-04 09:36:54,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 115 states and 12609 transitions. [2023-08-04 09:36:54,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:54,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 115 states and 12609 transitions. [2023-08-04 09:36:54,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 116 states, 115 states have (on average 109.64347826086957) internal successors, (12609), 115 states have internal predecessors, (12609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:54,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 116 states, 116 states have (on average 239.0) internal successors, (27724), 116 states have internal predecessors, (27724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:54,456 INFO L81 ComplementDD]: Finished complementDD. Result has 116 states, 116 states have (on average 239.0) internal successors, (27724), 116 states have internal predecessors, (27724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:54,456 INFO L175 Difference]: Start difference. First operand has 227 places, 605 transitions, 4612 flow. Second operand 115 states and 12609 transitions. [2023-08-04 09:36:54,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 3725 transitions, 35875 flow [2023-08-04 09:38:13,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 3725 transitions, 35066 flow, removed 348 selfloop flow, removed 1 redundant places. [2023-08-04 09:38:13,420 INFO L231 Difference]: Finished difference. Result has 403 places, 1927 transitions, 20511 flow [2023-08-04 09:38:13,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=4378, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=115, PETRI_FLOW=20511, PETRI_PLACES=403, PETRI_TRANSITIONS=1927} [2023-08-04 09:38:13,421 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2023-08-04 09:38:13,421 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1927 transitions, 20511 flow [2023-08-04 09:38:13,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.17241379310344) internal successors, (2760), 29 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:13,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:38:13,422 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] [2023-08-04 09:38:13,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 09:38:13,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-04 09:38:13,622 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:38:13,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:38:13,623 INFO L85 PathProgramCache]: Analyzing trace with hash 510805927, now seen corresponding path program 3 times [2023-08-04 09:38:13,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:38:13,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357429428] [2023-08-04 09:38:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:13,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:38:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:38:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 09:38:13,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:38:13,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357429428] [2023-08-04 09:38:13,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357429428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:38:13,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844108552] [2023-08-04 09:38:13,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 09:38:13,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:38:13,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:38:13,874 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 09:38:13,874 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 09:38:13,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 09:38:13,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:38:13,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-04 09:38:13,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:38:14,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-08-04 09:38:14,211 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:38:14,211 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-08-04 09:38:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:38:14,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:38:14,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 91 [2023-08-04 09:38:15,004 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 09:38:15,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 110 [2023-08-04 09:38:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:38:15,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844108552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:38:15,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:38:15,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-08-04 09:38:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856799201] [2023-08-04 09:38:15,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:38:15,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-04 09:38:15,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:38:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-04 09:38:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2023-08-04 09:38:16,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 239 [2023-08-04 09:38:16,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1927 transitions, 20511 flow. Second operand has 26 states, 26 states have (on average 78.15384615384616) internal successors, (2032), 26 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:16,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:38:16,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 239 [2023-08-04 09:38:16,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand