/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:58:03,174 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:58:03,253 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:58:03,260 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:58:03,261 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:58:03,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:58:03,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:58:03,287 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:58:03,288 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:58:03,292 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:58:03,292 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:58:03,292 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:58:03,293 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:58:03,294 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:58:03,294 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:58:03,295 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:58:03,295 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:58:03,295 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:58:03,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:58:03,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:58:03,296 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:58:03,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:58:03,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:58:03,296 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:58:03,296 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:58:03,297 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:58:03,297 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:58:03,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:58:03,298 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:58:03,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:58:03,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:58:03,299 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:58:03,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:58:03,299 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:58:03,299 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:58:03,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:58:03,299 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:58:03,300 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:58:03,300 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:58:03,300 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:58:03,300 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:58:03,300 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:58:03,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:58:03,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:58:03,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:58:03,569 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:58:03,569 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:58:03,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-3.wvr_bound2.c [2023-08-04 08:58:04,704 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:58:04,916 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:58:04,916 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-3.wvr_bound2.c [2023-08-04 08:58:04,924 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e30a6a0f/03ed58e792ec412ea07a83f51529fbb3/FLAG6536aaac6 [2023-08-04 08:58:04,937 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e30a6a0f/03ed58e792ec412ea07a83f51529fbb3 [2023-08-04 08:58:04,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:58:04,940 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:58:04,941 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:58:04,941 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:58:04,945 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:58:04,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:58:04" (1/1) ... [2023-08-04 08:58:04,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5682b554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:04, skipping insertion in model container [2023-08-04 08:58:04,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:58:04" (1/1) ... [2023-08-04 08:58:04,967 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:58:05,147 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-3.wvr_bound2.c[3332,3345] [2023-08-04 08:58:05,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:58:05,158 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:58:05,187 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-3.wvr_bound2.c[3332,3345] [2023-08-04 08:58:05,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:58:05,195 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:58:05,195 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:58:05,201 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:58:05,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05 WrapperNode [2023-08-04 08:58:05,202 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:58:05,203 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:58:05,203 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:58:05,203 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:58:05,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (1/1) ... [2023-08-04 08:58:05,220 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (1/1) ... [2023-08-04 08:58:05,242 INFO L138 Inliner]: procedures = 22, calls = 55, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 213 [2023-08-04 08:58:05,243 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:58:05,243 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:58:05,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:58:05,244 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:58:05,252 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (1/1) ... [2023-08-04 08:58:05,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (1/1) ... [2023-08-04 08:58:05,255 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (1/1) ... [2023-08-04 08:58:05,255 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (1/1) ... [2023-08-04 08:58:05,262 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (1/1) ... [2023-08-04 08:58:05,265 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (1/1) ... [2023-08-04 08:58:05,267 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (1/1) ... [2023-08-04 08:58:05,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (1/1) ... [2023-08-04 08:58:05,270 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:58:05,271 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:58:05,271 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:58:05,271 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:58:05,272 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (1/1) ... [2023-08-04 08:58:05,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:58:05,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:05,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:58:05,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:58:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:58:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:58:05,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:58:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:58:05,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:58:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:58:05,359 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:58:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:58:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:58:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:58:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:58:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:58:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:58:05,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:58:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:58:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:58:05,363 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:58:05,484 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:58:05,489 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:58:05,771 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:58:05,832 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:58:05,832 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 08:58:05,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:58:05 BoogieIcfgContainer [2023-08-04 08:58:05,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:58:05,839 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:58:05,839 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:58:05,842 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:58:05,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:58:04" (1/3) ... [2023-08-04 08:58:05,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@929637e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:58:05, skipping insertion in model container [2023-08-04 08:58:05,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:58:05" (2/3) ... [2023-08-04 08:58:05,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@929637e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:58:05, skipping insertion in model container [2023-08-04 08:58:05,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:58:05" (3/3) ... [2023-08-04 08:58:05,846 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-ticket-3.wvr_bound2.c [2023-08-04 08:58:05,853 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:58:05,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:58:05,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:58:05,862 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:58:05,973 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:58:06,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 167 transitions, 376 flow [2023-08-04 08:58:06,180 INFO L124 PetriNetUnfolderBase]: 83/619 cut-off events. [2023-08-04 08:58:06,180 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:58:06,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 619 events. 83/619 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3137 event pairs, 0 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 348. Up to 16 conditions per place. [2023-08-04 08:58:06,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 167 transitions, 376 flow [2023-08-04 08:58:06,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 154 transitions, 344 flow [2023-08-04 08:58:06,198 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:58:06,206 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 154 transitions, 344 flow [2023-08-04 08:58:06,208 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 154 transitions, 344 flow [2023-08-04 08:58:06,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 154 transitions, 344 flow [2023-08-04 08:58:06,272 INFO L124 PetriNetUnfolderBase]: 83/532 cut-off events. [2023-08-04 08:58:06,272 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:58:06,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 532 events. 83/532 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2428 event pairs, 0 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 302. Up to 16 conditions per place. [2023-08-04 08:58:06,282 INFO L119 LiptonReduction]: Number of co-enabled transitions 2736 [2023-08-04 08:58:09,807 INFO L134 LiptonReduction]: Checked pairs total: 13293 [2023-08-04 08:58:09,807 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-04 08:58:09,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:58:09,825 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;@648919c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:58:09,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:58:09,831 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:58:09,831 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2023-08-04 08:58:09,831 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:58:09,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:09,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:09,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:09,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:09,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1078635668, now seen corresponding path program 1 times [2023-08-04 08:58:09,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:09,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185645029] [2023-08-04 08:58:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:09,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:58:10,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:10,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185645029] [2023-08-04 08:58:10,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185645029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:10,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:58:10,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:58:10,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617606101] [2023-08-04 08:58:10,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:10,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:10,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:10,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:58:10,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 286 [2023-08-04 08:58:10,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:10,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:10,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 286 [2023-08-04 08:58:10,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:10,514 INFO L124 PetriNetUnfolderBase]: 2588/4417 cut-off events. [2023-08-04 08:58:10,514 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2023-08-04 08:58:10,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8693 conditions, 4417 events. 2588/4417 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 28482 event pairs, 1524 based on Foata normal form. 0/3900 useless extension candidates. Maximal degree in co-relation 7240. Up to 3991 conditions per place. [2023-08-04 08:58:10,542 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 41 selfloop transitions, 2 changer transitions 1/51 dead transitions. [2023-08-04 08:58:10,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 226 flow [2023-08-04 08:58:10,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-08-04 08:58:10,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174825174825175 [2023-08-04 08:58:10,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-08-04 08:58:10,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-08-04 08:58:10,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:10,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-08-04 08:58:10,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:10,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:10,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:10,582 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 130 flow. Second operand 3 states and 444 transitions. [2023-08-04 08:58:10,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 226 flow [2023-08-04 08:58:10,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 214 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:58:10,594 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 126 flow [2023-08-04 08:58:10,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-08-04 08:58:10,599 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-08-04 08:58:10,599 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 126 flow [2023-08-04 08:58:10,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:10,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:10,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:10,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:58:10,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:10,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:10,603 INFO L85 PathProgramCache]: Analyzing trace with hash 198464432, now seen corresponding path program 1 times [2023-08-04 08:58:10,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:10,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578038086] [2023-08-04 08:58:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:10,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:58:10,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:10,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578038086] [2023-08-04 08:58:10,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578038086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:10,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182954317] [2023-08-04 08:58:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:10,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:10,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:10,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:58:10,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:58:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:10,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:10,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:58:10,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:10,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182954317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:10,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:10,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:58:10,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144042920] [2023-08-04 08:58:10,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:10,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:10,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:10,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:10,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:10,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 286 [2023-08-04 08:58:10,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:10,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:10,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 286 [2023-08-04 08:58:10,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:11,193 INFO L124 PetriNetUnfolderBase]: 2502/4213 cut-off events. [2023-08-04 08:58:11,193 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-04 08:58:11,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8333 conditions, 4213 events. 2502/4213 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 26216 event pairs, 1773 based on Foata normal form. 0/3735 useless extension candidates. Maximal degree in co-relation 8294. Up to 3813 conditions per place. [2023-08-04 08:58:11,215 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 44 selfloop transitions, 2 changer transitions 1/54 dead transitions. [2023-08-04 08:58:11,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 234 flow [2023-08-04 08:58:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-08-04 08:58:11,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5209790209790209 [2023-08-04 08:58:11,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-08-04 08:58:11,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-08-04 08:58:11,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:11,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-08-04 08:58:11,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:11,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:11,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:11,228 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 126 flow. Second operand 3 states and 447 transitions. [2023-08-04 08:58:11,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 234 flow [2023-08-04 08:58:11,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:58:11,230 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 130 flow [2023-08-04 08:58:11,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-08-04 08:58:11,231 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-04 08:58:11,231 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 130 flow [2023-08-04 08:58:11,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:11,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:11,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:11,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 08:58:11,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:11,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:11,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1408342897, now seen corresponding path program 1 times [2023-08-04 08:58:11,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:11,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615766280] [2023-08-04 08:58:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:11,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:58:11,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:11,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615766280] [2023-08-04 08:58:11,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615766280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:11,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233367737] [2023-08-04 08:58:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:11,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:11,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:11,544 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:58:11,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:58:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:11,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:11,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:58:11,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:11,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233367737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:11,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:11,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:58:11,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737732112] [2023-08-04 08:58:11,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:11,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:11,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:11,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:11,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:11,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 286 [2023-08-04 08:58:11,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:11,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:11,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 286 [2023-08-04 08:58:11,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:11,955 INFO L124 PetriNetUnfolderBase]: 2486/4057 cut-off events. [2023-08-04 08:58:11,955 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-04 08:58:11,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8209 conditions, 4057 events. 2486/4057 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23320 event pairs, 1708 based on Foata normal form. 0/3616 useless extension candidates. Maximal degree in co-relation 6325. Up to 3599 conditions per place. [2023-08-04 08:58:11,982 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 47 selfloop transitions, 2 changer transitions 1/57 dead transitions. [2023-08-04 08:58:11,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 250 flow [2023-08-04 08:58:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-04 08:58:11,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244755244755245 [2023-08-04 08:58:11,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-04 08:58:11,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-04 08:58:11,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:11,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-04 08:58:11,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:11,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:11,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:11,989 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 130 flow. Second operand 3 states and 450 transitions. [2023-08-04 08:58:11,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 250 flow [2023-08-04 08:58:11,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:58:12,031 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 134 flow [2023-08-04 08:58:12,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-08-04 08:58:12,032 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-04 08:58:12,033 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 134 flow [2023-08-04 08:58:12,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:12,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:12,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:12,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:58:12,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:58:12,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:12,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:12,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1649655949, now seen corresponding path program 1 times [2023-08-04 08:58:12,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:12,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630689021] [2023-08-04 08:58:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:12,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:58:12,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630689021] [2023-08-04 08:58:12,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630689021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:12,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295202836] [2023-08-04 08:58:12,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:12,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:12,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:12,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:58:12,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:58:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:12,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:12,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:58:12,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:12,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295202836] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:12,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:12,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:58:12,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056242902] [2023-08-04 08:58:12,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:12,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:12,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:12,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:12,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 286 [2023-08-04 08:58:12,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:12,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:12,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 286 [2023-08-04 08:58:12,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:12,683 INFO L124 PetriNetUnfolderBase]: 1526/2617 cut-off events. [2023-08-04 08:58:12,683 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2023-08-04 08:58:12,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5486 conditions, 2617 events. 1526/2617 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 14327 event pairs, 1099 based on Foata normal form. 0/2428 useless extension candidates. Maximal degree in co-relation 4261. Up to 1927 conditions per place. [2023-08-04 08:58:12,699 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 52 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 08:58:12,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 276 flow [2023-08-04 08:58:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:12,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 08:58:12,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291375291375291 [2023-08-04 08:58:12,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 08:58:12,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 08:58:12,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:12,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 08:58:12,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:12,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:12,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:12,704 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 134 flow. Second operand 3 states and 454 transitions. [2023-08-04 08:58:12,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 276 flow [2023-08-04 08:58:12,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:58:12,707 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 142 flow [2023-08-04 08:58:12,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-04 08:58:12,707 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-04 08:58:12,708 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 142 flow [2023-08-04 08:58:12,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:12,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:12,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:12,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:58:12,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:12,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:12,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1943683298, now seen corresponding path program 1 times [2023-08-04 08:58:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:12,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258417863] [2023-08-04 08:58:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:12,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:58:12,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:12,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258417863] [2023-08-04 08:58:12,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258417863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:12,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708953478] [2023-08-04 08:58:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:12,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:12,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:12,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:58:12,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:58:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:13,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:13,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:58:13,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:13,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708953478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:13,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:13,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:58:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363211200] [2023-08-04 08:58:13,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:13,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:13,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:13,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 286 [2023-08-04 08:58:13,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:13,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:13,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 286 [2023-08-04 08:58:13,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:13,255 INFO L124 PetriNetUnfolderBase]: 1285/2236 cut-off events. [2023-08-04 08:58:13,255 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2023-08-04 08:58:13,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4869 conditions, 2236 events. 1285/2236 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11885 event pairs, 1094 based on Foata normal form. 0/2188 useless extension candidates. Maximal degree in co-relation 3758. Up to 1773 conditions per place. [2023-08-04 08:58:13,268 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 53 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 08:58:13,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 286 flow [2023-08-04 08:58:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 08:58:13,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291375291375291 [2023-08-04 08:58:13,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 08:58:13,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 08:58:13,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:13,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 08:58:13,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:13,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:13,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:13,273 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 142 flow. Second operand 3 states and 454 transitions. [2023-08-04 08:58:13,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 286 flow [2023-08-04 08:58:13,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:58:13,278 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 152 flow [2023-08-04 08:58:13,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-08-04 08:58:13,278 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-08-04 08:58:13,279 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 152 flow [2023-08-04 08:58:13,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:13,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:13,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:13,288 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 08:58:13,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:13,489 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:13,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2132995704, now seen corresponding path program 1 times [2023-08-04 08:58:13,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:13,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322189971] [2023-08-04 08:58:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:13,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:58:13,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:13,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322189971] [2023-08-04 08:58:13,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322189971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:13,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80901451] [2023-08-04 08:58:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:13,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:13,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:13,587 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:58:13,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:58:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:13,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:58:13,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:58:13,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:58:13,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80901451] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:13,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:58:13,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:58:13,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643206776] [2023-08-04 08:58:13,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:13,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:13,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:13,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:13,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 286 [2023-08-04 08:58:13,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 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 08:58:13,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:13,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 286 [2023-08-04 08:58:13,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:13,886 INFO L124 PetriNetUnfolderBase]: 1275/2216 cut-off events. [2023-08-04 08:58:13,886 INFO L125 PetriNetUnfolderBase]: For 265/265 co-relation queries the response was YES. [2023-08-04 08:58:13,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4883 conditions, 2216 events. 1275/2216 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11735 event pairs, 1239 based on Foata normal form. 0/2193 useless extension candidates. Maximal degree in co-relation 3826. Up to 2026 conditions per place. [2023-08-04 08:58:13,897 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 47 selfloop transitions, 2 changer transitions 3/59 dead transitions. [2023-08-04 08:58:13,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 276 flow [2023-08-04 08:58:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-04 08:58:13,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244755244755245 [2023-08-04 08:58:13,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-04 08:58:13,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-04 08:58:13,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:13,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-04 08:58:13,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:13,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:13,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:13,902 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 152 flow. Second operand 3 states and 450 transitions. [2023-08-04 08:58:13,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 276 flow [2023-08-04 08:58:13,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:58:13,911 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 150 flow [2023-08-04 08:58:13,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-08-04 08:58:13,912 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2023-08-04 08:58:13,912 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 150 flow [2023-08-04 08:58:13,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 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 08:58:13,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:13,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:13,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:58:14,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:14,119 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:14,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:14,119 INFO L85 PathProgramCache]: Analyzing trace with hash 410592976, now seen corresponding path program 1 times [2023-08-04 08:58:14,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:14,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203144816] [2023-08-04 08:58:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:14,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:58:14,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:14,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203144816] [2023-08-04 08:58:14,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203144816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:58:14,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569832726] [2023-08-04 08:58:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:14,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:14,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:58:14,175 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:58:14,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:58:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:14,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:58:14,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:58:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:58:14,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:58:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:58:14,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569832726] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:58:14,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:58:14,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:58:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889047820] [2023-08-04 08:58:14,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:58:14,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:58:14,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:14,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:58:14,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:58:14,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 286 [2023-08-04 08:58:14,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:14,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:14,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 286 [2023-08-04 08:58:14,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:14,345 INFO L124 PetriNetUnfolderBase]: 6/22 cut-off events. [2023-08-04 08:58:14,345 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:58:14,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 22 events. 6/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 4/25 useless extension candidates. Maximal degree in co-relation 47. Up to 14 conditions per place. [2023-08-04 08:58:14,345 INFO L140 encePairwiseOnDemand]: 283/286 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 08:58:14,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 13 transitions, 52 flow [2023-08-04 08:58:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:58:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:58:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2023-08-04 08:58:14,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47202797202797203 [2023-08-04 08:58:14,347 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2023-08-04 08:58:14,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2023-08-04 08:58:14,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:14,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2023-08-04 08:58:14,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:14,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:14,351 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:14,351 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 150 flow. Second operand 4 states and 540 transitions. [2023-08-04 08:58:14,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 13 transitions, 52 flow [2023-08-04 08:58:14,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 13 transitions, 50 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:58:14,352 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 08:58:14,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 08:58:14,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -23 predicate places. [2023-08-04 08:58:14,352 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 08:58:14,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:14,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:58:14,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:58:14,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:58:14,562 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:14,564 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:58:14,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 167 transitions, 376 flow [2023-08-04 08:58:14,613 INFO L124 PetriNetUnfolderBase]: 83/619 cut-off events. [2023-08-04 08:58:14,614 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:58:14,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 619 events. 83/619 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3137 event pairs, 0 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 348. Up to 16 conditions per place. [2023-08-04 08:58:14,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 167 transitions, 376 flow [2023-08-04 08:58:14,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 111 transitions, 237 flow [2023-08-04 08:58:14,621 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:58:14,621 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 111 transitions, 237 flow [2023-08-04 08:58:14,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 111 transitions, 237 flow [2023-08-04 08:58:14,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 111 transitions, 237 flow [2023-08-04 08:58:14,636 INFO L124 PetriNetUnfolderBase]: 7/219 cut-off events. [2023-08-04 08:58:14,636 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:58:14,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 219 events. 7/219 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 568 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2023-08-04 08:58:14,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 1180 [2023-08-04 08:58:17,386 INFO L134 LiptonReduction]: Checked pairs total: 4171 [2023-08-04 08:58:17,387 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-04 08:58:17,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:58:17,389 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;@648919c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:58:17,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:58:17,391 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:58:17,391 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 08:58:17,391 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:58:17,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:17,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:58:17,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:58:17,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:17,392 INFO L85 PathProgramCache]: Analyzing trace with hash 107704997, now seen corresponding path program 1 times [2023-08-04 08:58:17,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:17,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061805948] [2023-08-04 08:58:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:17,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:58:17,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:17,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061805948] [2023-08-04 08:58:17,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061805948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:17,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:58:17,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:58:17,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676416308] [2023-08-04 08:58:17,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:17,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:17,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:58:17,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 258 [2023-08-04 08:58:17,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:17,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:17,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 258 [2023-08-04 08:58:17,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:58:17,485 INFO L124 PetriNetUnfolderBase]: 375/735 cut-off events. [2023-08-04 08:58:17,485 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:58:17,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1451 conditions, 735 events. 375/735 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3882 event pairs, 192 based on Foata normal form. 0/701 useless extension candidates. Maximal degree in co-relation 1430. Up to 620 conditions per place. [2023-08-04 08:58:17,489 INFO L140 encePairwiseOnDemand]: 255/258 looper letters, 22 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-04 08:58:17,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 125 flow [2023-08-04 08:58:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:58:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:58:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-08-04 08:58:17,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478036175710594 [2023-08-04 08:58:17,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-08-04 08:58:17,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-08-04 08:58:17,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:58:17,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-08-04 08:58:17,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:17,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:17,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:17,493 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 69 flow. Second operand 3 states and 424 transitions. [2023-08-04 08:58:17,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 125 flow [2023-08-04 08:58:17,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 125 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:58:17,495 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 77 flow [2023-08-04 08:58:17,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, 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=77, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-04 08:58:17,495 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 08:58:17,495 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 77 flow [2023-08-04 08:58:17,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:17,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:17,496 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:58:17,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:58:17,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:58:17,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:17,497 INFO L85 PathProgramCache]: Analyzing trace with hash 113598998, now seen corresponding path program 1 times [2023-08-04 08:58:17,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:17,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026215646] [2023-08-04 08:58:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:17,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:58:17,513 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:58:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:58:17,532 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:58:17,533 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:58:17,533 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:58:17,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:58:17,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:58:17,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:58:17,533 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 08:58:17,534 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:58:17,534 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:58:17,535 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:58:17,558 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:58:17,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 198 transitions, 486 flow [2023-08-04 08:58:17,943 INFO L124 PetriNetUnfolderBase]: 835/4033 cut-off events. [2023-08-04 08:58:17,944 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:58:17,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 4033 events. 835/4033 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 33052 event pairs, 33 based on Foata normal form. 0/3442 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-04 08:58:17,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 198 transitions, 486 flow [2023-08-04 08:58:17,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 185 transitions, 448 flow [2023-08-04 08:58:17,977 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:58:17,977 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 185 transitions, 448 flow [2023-08-04 08:58:17,977 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 185 transitions, 448 flow [2023-08-04 08:58:17,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 185 transitions, 448 flow [2023-08-04 08:58:18,288 INFO L124 PetriNetUnfolderBase]: 835/3380 cut-off events. [2023-08-04 08:58:18,288 INFO L125 PetriNetUnfolderBase]: For 589/589 co-relation queries the response was YES. [2023-08-04 08:58:18,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4028 conditions, 3380 events. 835/3380 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 25301 event pairs, 33 based on Foata normal form. 0/2853 useless extension candidates. Maximal degree in co-relation 2039. Up to 192 conditions per place. [2023-08-04 08:58:18,350 INFO L119 LiptonReduction]: Number of co-enabled transitions 6996 [2023-08-04 08:58:20,997 INFO L134 LiptonReduction]: Checked pairs total: 44759 [2023-08-04 08:58:20,997 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-04 08:58:20,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:58:20,999 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;@648919c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:58:20,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:58:21,002 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:58:21,002 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 08:58:21,002 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:58:21,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:58:21,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:58:21,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:58:21,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:58:21,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1524223594, now seen corresponding path program 1 times [2023-08-04 08:58:21,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:58:21,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885616790] [2023-08-04 08:58:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:58:21,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:58:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:58:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:58:21,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:58:21,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885616790] [2023-08-04 08:58:21,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885616790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:58:21,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:58:21,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:58:21,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672361246] [2023-08-04 08:58:21,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:58:21,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:58:21,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:58:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:58:21,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:58:21,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 08:58:21,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:58:21,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:58:21,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 08:58:21,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:59:18,413 INFO L124 PetriNetUnfolderBase]: 656063/895205 cut-off events. [2023-08-04 08:59:18,414 INFO L125 PetriNetUnfolderBase]: For 112222/112222 co-relation queries the response was YES. [2023-08-04 08:59:21,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785004 conditions, 895205 events. 656063/895205 cut-off events. For 112222/112222 co-relation queries the response was YES. Maximal size of possible extension queue 23535. Compared 7461533 event pairs, 502902 based on Foata normal form. 0/834336 useless extension candidates. Maximal degree in co-relation 503309. Up to 827362 conditions per place. [2023-08-04 08:59:24,852 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 64 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 08:59:24,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 80 transitions, 370 flow [2023-08-04 08:59:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:59:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:59:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-04 08:59:24,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2023-08-04 08:59:24,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-04 08:59:24,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-04 08:59:24,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:59:24,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-04 08:59:24,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:24,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:24,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:24,862 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 228 flow. Second operand 3 states and 496 transitions. [2023-08-04 08:59:24,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 80 transitions, 370 flow [2023-08-04 08:59:25,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 80 transitions, 358 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:59:25,618 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 228 flow [2023-08-04 08:59:25,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2023-08-04 08:59:25,619 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-08-04 08:59:25,619 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 228 flow [2023-08-04 08:59:25,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:25,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:59:25,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:59:25,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:59:25,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:59:25,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:59:25,621 INFO L85 PathProgramCache]: Analyzing trace with hash 2115519292, now seen corresponding path program 1 times [2023-08-04 08:59:25,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:59:25,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433515710] [2023-08-04 08:59:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:59:25,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:59:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:59:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:59:25,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:59:25,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433515710] [2023-08-04 08:59:25,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433515710] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:59:25,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875588062] [2023-08-04 08:59:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:59:25,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:59:25,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:59:25,663 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:59:25,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:59:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:59:25,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:59:25,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:59:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:59:25,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:59:25,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875588062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:59:25,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:59:25,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:59:25,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726766851] [2023-08-04 08:59:25,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:59:25,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:59:25,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:59:25,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:59:25,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:59:25,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 08:59:25,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:25,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:59:25,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 08:59:25,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:00:21,439 INFO L124 PetriNetUnfolderBase]: 652649/885127 cut-off events. [2023-08-04 09:00:21,440 INFO L125 PetriNetUnfolderBase]: For 73142/73142 co-relation queries the response was YES. [2023-08-04 09:00:24,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768355 conditions, 885127 events. 652649/885127 cut-off events. For 73142/73142 co-relation queries the response was YES. Maximal size of possible extension queue 23438. Compared 7250793 event pairs, 501013 based on Foata normal form. 0/825694 useless extension candidates. Maximal degree in co-relation 1768311. Up to 822432 conditions per place. [2023-08-04 09:00:27,746 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 71 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-04 09:00:27,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 87 transitions, 396 flow [2023-08-04 09:00:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:00:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:00:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-04 09:00:27,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2023-08-04 09:00:27,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-04 09:00:27,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-04 09:00:27,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:00:27,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-04 09:00:27,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:27,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:27,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:27,751 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 228 flow. Second operand 3 states and 502 transitions. [2023-08-04 09:00:27,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 87 transitions, 396 flow [2023-08-04 09:00:27,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:00:27,788 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 238 flow [2023-08-04 09:00:27,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2023-08-04 09:00:27,789 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-04 09:00:27,789 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 238 flow [2023-08-04 09:00:27,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:27,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:00:27,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:00:27,794 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 09:00:27,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:00:27,990 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:00:27,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:00:27,991 INFO L85 PathProgramCache]: Analyzing trace with hash 827269839, now seen corresponding path program 1 times [2023-08-04 09:00:27,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:00:27,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859086417] [2023-08-04 09:00:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:27,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:00:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:28,025 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 09:00:28,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:00:28,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859086417] [2023-08-04 09:00:28,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859086417] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:00:28,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27841062] [2023-08-04 09:00:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:28,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:00:28,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:00:28,027 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 09:00:28,029 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 09:00:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:28,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:00:28,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:00:28,103 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 09:00:28,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:00:28,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27841062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:00:28,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:00:28,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:00:28,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123783111] [2023-08-04 09:00:28,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:00:28,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:00:28,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:00:28,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:00:28,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:00:28,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 09:00:28,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 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 09:00:28,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:00:28,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 09:00:28,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:23,227 INFO L124 PetriNetUnfolderBase]: 652249/872887 cut-off events. [2023-08-04 09:01:23,227 INFO L125 PetriNetUnfolderBase]: For 45986/45986 co-relation queries the response was YES. [2023-08-04 09:01:26,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756612 conditions, 872887 events. 652249/872887 cut-off events. For 45986/45986 co-relation queries the response was YES. Maximal size of possible extension queue 23835. Compared 6960589 event pairs, 497560 based on Foata normal form. 0/814757 useless extension candidates. Maximal degree in co-relation 514514. Up to 813434 conditions per place. [2023-08-04 09:01:29,612 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 78 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-04 09:01:29,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 432 flow [2023-08-04 09:01:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:01:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:01:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-04 09:01:29,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2023-08-04 09:01:29,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-04 09:01:29,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-04 09:01:29,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:29,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-04 09:01:29,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:29,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:29,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:29,618 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 238 flow. Second operand 3 states and 508 transitions. [2023-08-04 09:01:29,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 432 flow [2023-08-04 09:01:29,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:01:29,639 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 248 flow [2023-08-04 09:01:29,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2023-08-04 09:01:29,640 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2023-08-04 09:01:29,640 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 248 flow [2023-08-04 09:01:29,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 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 09:01:29,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:29,641 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 09:01:29,648 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 09:01:29,845 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,SelfDestructingSolverStorable11 [2023-08-04 09:01:29,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:29,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:29,846 INFO L85 PathProgramCache]: Analyzing trace with hash -628710022, now seen corresponding path program 1 times [2023-08-04 09:01:29,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:29,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102620633] [2023-08-04 09:01:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:29,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:29,877 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 09:01:29,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:29,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102620633] [2023-08-04 09:01:29,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102620633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:01:29,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701120171] [2023-08-04 09:01:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:29,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:29,879 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 09:01:29,881 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 09:01:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:29,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:01:29,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:01:29,969 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 09:01:29,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:01:29,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701120171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:01:29,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:01:29,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:01:29,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965403488] [2023-08-04 09:01:29,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:01:29,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:01:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:29,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:01:29,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:01:29,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 09:01:29,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:29,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:29,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 09:01:29,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:02:18,050 INFO L124 PetriNetUnfolderBase]: 541137/726543 cut-off events. [2023-08-04 09:02:18,050 INFO L125 PetriNetUnfolderBase]: For 46272/46272 co-relation queries the response was YES. [2023-08-04 09:02:20,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1488245 conditions, 726543 events. 541137/726543 cut-off events. For 46272/46272 co-relation queries the response was YES. Maximal size of possible extension queue 18907. Compared 5730087 event pairs, 405605 based on Foata normal form. 0/691577 useless extension candidates. Maximal degree in co-relation 460306. Up to 564634 conditions per place. [2023-08-04 09:02:23,217 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 88 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-04 09:02:23,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 104 transitions, 495 flow [2023-08-04 09:02:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:02:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:02:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-04 09:02:23,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385416666666667 [2023-08-04 09:02:23,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-04 09:02:23,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-04 09:02:23,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:02:23,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-04 09:02:23,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:02:23,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:02:23,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:02:23,222 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 248 flow. Second operand 3 states and 517 transitions. [2023-08-04 09:02:23,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 104 transitions, 495 flow [2023-08-04 09:02:23,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:02:23,280 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 258 flow [2023-08-04 09:02:23,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2023-08-04 09:02:23,280 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-08-04 09:02:23,281 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 258 flow [2023-08-04 09:02:23,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:02:23,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:23,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:23,286 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 09:02:23,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:02:23,482 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:02:23,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1819267579, now seen corresponding path program 1 times [2023-08-04 09:02:23,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:23,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360255736] [2023-08-04 09:02:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:23,545 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 09:02:23,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:02:23,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360255736] [2023-08-04 09:02:23,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360255736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:02:23,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379441566] [2023-08-04 09:02:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:23,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:02:23,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:02:23,547 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 09:02:23,549 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 09:02:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:23,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:02:23,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:02:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:02:23,637 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:02:23,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379441566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:02:23,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:02:23,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:02:23,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935749980] [2023-08-04 09:02:23,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:02:23,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:02:23,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:02:23,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:02:23,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:02:23,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 09:02:23,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:02:23,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:02:23,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 09:02:23,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:10,170 INFO L124 PetriNetUnfolderBase]: 485172/659750 cut-off events. [2023-08-04 09:03:10,170 INFO L125 PetriNetUnfolderBase]: For 100928/100928 co-relation queries the response was YES. [2023-08-04 09:03:12,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1395899 conditions, 659750 events. 485172/659750 cut-off events. For 100928/100928 co-relation queries the response was YES. Maximal size of possible extension queue 13749. Compared 5236761 event pairs, 371318 based on Foata normal form. 0/648201 useless extension candidates. Maximal degree in co-relation 447648. Up to 498002 conditions per place. [2023-08-04 09:03:14,770 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 89 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-04 09:03:14,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 507 flow [2023-08-04 09:03:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-04 09:03:14,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385416666666667 [2023-08-04 09:03:14,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-04 09:03:14,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-04 09:03:14,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:14,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-04 09:03:14,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:14,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:14,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:14,775 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 258 flow. Second operand 3 states and 517 transitions. [2023-08-04 09:03:14,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 507 flow [2023-08-04 09:03:27,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 105 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:27,029 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 268 flow [2023-08-04 09:03:27,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-08-04 09:03:27,030 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2023-08-04 09:03:27,030 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 268 flow [2023-08-04 09:03:27,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:27,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:27,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:27,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:27,231 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,SelfDestructingSolverStorable13 [2023-08-04 09:03:27,231 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:27,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:27,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1407400080, now seen corresponding path program 1 times [2023-08-04 09:03:27,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:27,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845887212] [2023-08-04 09:03:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:27,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:03:27,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:27,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845887212] [2023-08-04 09:03:27,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845887212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:27,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823478743] [2023-08-04 09:03:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:27,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:27,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:27,291 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 09:03:27,311 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 09:03:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:27,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:27,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:03:27,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:27,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823478743] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:27,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:27,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:03:27,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129411888] [2023-08-04 09:03:27,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:27,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:27,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:27,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:27,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:27,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-04 09:03:27,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:27,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:27,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-04 09:03:27,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:16,070 INFO L124 PetriNetUnfolderBase]: 480087/654445 cut-off events. [2023-08-04 09:04:16,070 INFO L125 PetriNetUnfolderBase]: For 99610/99610 co-relation queries the response was YES. [2023-08-04 09:04:18,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1405436 conditions, 654445 events. 480087/654445 cut-off events. For 99610/99610 co-relation queries the response was YES. Maximal size of possible extension queue 13637. Compared 5201035 event pairs, 425837 based on Foata normal form. 0/652121 useless extension candidates. Maximal degree in co-relation 850818. Up to 570000 conditions per place. [2023-08-04 09:04:20,957 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 90 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-04 09:04:20,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 519 flow [2023-08-04 09:04:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-04 09:04:20,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385416666666667 [2023-08-04 09:04:20,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-04 09:04:20,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-04 09:04:20,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:20,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-04 09:04:20,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:20,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:20,962 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:20,962 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 268 flow. Second operand 3 states and 517 transitions. [2023-08-04 09:04:20,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 519 flow