/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_chl-poker-hand-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:29:17,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:29:17,190 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:29:17,194 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:29:17,195 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:29:17,195 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:29:17,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:29:17,229 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:29:17,229 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:29:17,233 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:29:17,233 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:29:17,234 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:29:17,234 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:29:17,235 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:29:17,236 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:29:17,236 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:29:17,236 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:29:17,237 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:29:17,237 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:29:17,237 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:29:17,237 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:29:17,238 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:29:17,238 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:29:17,238 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:29:17,238 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:29:17,239 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:29:17,239 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:29:17,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:29:17,240 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:29:17,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:29:17,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:29:17,241 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:29:17,241 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:29:17,241 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:29:17,242 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:29:17,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:29:17,242 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:29:17,242 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:29:17,242 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:29:17,242 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:29:17,243 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:29:17,243 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:29:17,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:29:17,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:29:17,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:29:17,525 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:29:17,525 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:29:17,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-poker-hand-symm.wvr_bound2.c [2023-08-04 08:29:18,740 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:29:18,931 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:29:18,931 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-poker-hand-symm.wvr_bound2.c [2023-08-04 08:29:18,947 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c516aff40/a94e174aafd542899be80dc98241c9d2/FLAG5518319b1 [2023-08-04 08:29:18,961 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c516aff40/a94e174aafd542899be80dc98241c9d2 [2023-08-04 08:29:18,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:29:18,967 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:29:18,968 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:29:18,968 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:29:18,976 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:29:18,976 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:29:18" (1/1) ... [2023-08-04 08:29:18,977 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424e1d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:18, skipping insertion in model container [2023-08-04 08:29:18,977 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:29:18" (1/1) ... [2023-08-04 08:29:19,010 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:29:19,279 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_chl-poker-hand-symm.wvr_bound2.c[12983,12996] [2023-08-04 08:29:19,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:29:19,291 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:29:19,391 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_chl-poker-hand-symm.wvr_bound2.c[12983,12996] [2023-08-04 08:29:19,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:29:19,405 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:29:19,405 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:29:19,410 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:29:19,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19 WrapperNode [2023-08-04 08:29:19,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:29:19,411 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:29:19,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:29:19,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:29:19,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (1/1) ... [2023-08-04 08:29:19,437 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (1/1) ... [2023-08-04 08:29:19,512 INFO L138 Inliner]: procedures = 25, calls = 307, calls flagged for inlining = 69, calls inlined = 97, statements flattened = 1578 [2023-08-04 08:29:19,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:29:19,513 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:29:19,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:29:19,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:29:19,522 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (1/1) ... [2023-08-04 08:29:19,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (1/1) ... [2023-08-04 08:29:19,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (1/1) ... [2023-08-04 08:29:19,536 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (1/1) ... [2023-08-04 08:29:19,623 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (1/1) ... [2023-08-04 08:29:19,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (1/1) ... [2023-08-04 08:29:19,687 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (1/1) ... [2023-08-04 08:29:19,693 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (1/1) ... [2023-08-04 08:29:19,710 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:29:19,711 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:29:19,711 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:29:19,712 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:29:19,713 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (1/1) ... [2023-08-04 08:29:19,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:29:19,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:29:19,750 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 08:29:19,775 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 08:29:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:29:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:29:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:29:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:29:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:29:19,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:29:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:29:19,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:29:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:29:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:29:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:29:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:29:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:29:19,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:29:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:29:19,794 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 08:29:19,965 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:29:19,966 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:29:21,393 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:29:22,836 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:29:22,836 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-04 08:29:22,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:29:22 BoogieIcfgContainer [2023-08-04 08:29:22,839 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:29:22,841 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:29:22,841 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:29:22,844 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:29:22,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:29:18" (1/3) ... [2023-08-04 08:29:22,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449381d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:29:22, skipping insertion in model container [2023-08-04 08:29:22,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:29:19" (2/3) ... [2023-08-04 08:29:22,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449381d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:29:22, skipping insertion in model container [2023-08-04 08:29:22,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:29:22" (3/3) ... [2023-08-04 08:29:22,846 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-poker-hand-symm.wvr_bound2.c [2023-08-04 08:29:22,855 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:29:22,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:29:22,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:29:22,864 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:29:23,106 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:29:23,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 429 places, 485 transitions, 992 flow [2023-08-04 08:29:23,431 INFO L124 PetriNetUnfolderBase]: 88/670 cut-off events. [2023-08-04 08:29:23,431 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:29:23,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 670 events. 88/670 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1948 event pairs, 0 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 465. Up to 14 conditions per place. [2023-08-04 08:29:23,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 429 places, 485 transitions, 992 flow [2023-08-04 08:29:23,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 429 places, 485 transitions, 992 flow [2023-08-04 08:29:23,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:29:23,459 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 429 places, 485 transitions, 992 flow [2023-08-04 08:29:23,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 429 places, 485 transitions, 992 flow [2023-08-04 08:29:23,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 429 places, 485 transitions, 992 flow [2023-08-04 08:29:23,608 INFO L124 PetriNetUnfolderBase]: 88/670 cut-off events. [2023-08-04 08:29:23,608 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:29:23,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 670 events. 88/670 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1948 event pairs, 0 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 465. Up to 14 conditions per place. [2023-08-04 08:29:23,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 18150 [2023-08-04 08:30:17,740 INFO L134 LiptonReduction]: Checked pairs total: 20000 [2023-08-04 08:30:17,741 INFO L136 LiptonReduction]: Total number of compositions: 567 [2023-08-04 08:30:17,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:30:17,758 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;@1886006, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:30:17,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:30:17,774 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:30:17,774 INFO L124 PetriNetUnfolderBase]: 12/34 cut-off events. [2023-08-04 08:30:17,774 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:30:17,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:17,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:17,775 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:17,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:17,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2000716820, now seen corresponding path program 1 times [2023-08-04 08:30:17,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:17,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879050547] [2023-08-04 08:30:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:17,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:18,209 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 08:30:18,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879050547] [2023-08-04 08:30:18,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879050547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:18,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:30:18,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:30:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605220160] [2023-08-04 08:30:18,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:18,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:18,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:18,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:18,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:30:18,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 391 out of 1052 [2023-08-04 08:30:18,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 54 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 395.3333333333333) internal successors, (1186), 3 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:18,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:18,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 391 of 1052 [2023-08-04 08:30:18,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:19,543 INFO L124 PetriNetUnfolderBase]: 612/878 cut-off events. [2023-08-04 08:30:19,543 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 08:30:19,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1774 conditions, 878 events. 612/878 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2745 event pairs, 240 based on Foata normal form. 0/446 useless extension candidates. Maximal degree in co-relation 1432. Up to 848 conditions per place. [2023-08-04 08:30:19,549 INFO L140 encePairwiseOnDemand]: 1042/1052 looper letters, 45 selfloop transitions, 8 changer transitions 2/57 dead transitions. [2023-08-04 08:30:19,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 57 transitions, 242 flow [2023-08-04 08:30:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:19,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1231 transitions. [2023-08-04 08:30:19,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39005069708491763 [2023-08-04 08:30:19,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1231 transitions. [2023-08-04 08:30:19,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1231 transitions. [2023-08-04 08:30:19,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:19,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1231 transitions. [2023-08-04 08:30:19,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 410.3333333333333) internal successors, (1231), 3 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:19,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:19,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:19,595 INFO L175 Difference]: Start difference. First operand has 39 places, 54 transitions, 130 flow. Second operand 3 states and 1231 transitions. [2023-08-04 08:30:19,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 57 transitions, 242 flow [2023-08-04 08:30:19,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 242 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:30:19,601 INFO L231 Difference]: Finished difference. Result has 41 places, 55 transitions, 162 flow [2023-08-04 08:30:19,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1052, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=41, PETRI_TRANSITIONS=55} [2023-08-04 08:30:19,605 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-04 08:30:19,606 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 55 transitions, 162 flow [2023-08-04 08:30:19,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 395.3333333333333) internal successors, (1186), 3 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:19,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:19,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:19,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:30:19,607 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:19,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:19,608 INFO L85 PathProgramCache]: Analyzing trace with hash -758489647, now seen corresponding path program 1 times [2023-08-04 08:30:19,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:19,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006260950] [2023-08-04 08:30:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:19,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:19,764 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 08:30:19,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:19,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006260950] [2023-08-04 08:30:19,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006260950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:19,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:30:19,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:30:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378105564] [2023-08-04 08:30:19,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:19,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:19,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:30:19,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 419 out of 1052 [2023-08-04 08:30:19,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 55 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 424.6666666666667) internal successors, (1274), 3 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:19,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:19,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 419 of 1052 [2023-08-04 08:30:19,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:20,766 INFO L124 PetriNetUnfolderBase]: 589/832 cut-off events. [2023-08-04 08:30:20,766 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-04 08:30:20,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 832 events. 589/832 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2353 event pairs, 105 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 1648. Up to 805 conditions per place. [2023-08-04 08:30:20,770 INFO L140 encePairwiseOnDemand]: 1049/1052 looper letters, 58 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2023-08-04 08:30:20,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 63 transitions, 300 flow [2023-08-04 08:30:20,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1315 transitions. [2023-08-04 08:30:20,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-04 08:30:20,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1315 transitions. [2023-08-04 08:30:20,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1315 transitions. [2023-08-04 08:30:20,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:20,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1315 transitions. [2023-08-04 08:30:20,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 438.3333333333333) internal successors, (1315), 3 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:20,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:20,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:20,786 INFO L175 Difference]: Start difference. First operand has 41 places, 55 transitions, 162 flow. Second operand 3 states and 1315 transitions. [2023-08-04 08:30:20,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 63 transitions, 300 flow [2023-08-04 08:30:20,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 63 transitions, 286 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:30:20,789 INFO L231 Difference]: Finished difference. Result has 39 places, 55 transitions, 156 flow [2023-08-04 08:30:20,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1052, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=39, PETRI_TRANSITIONS=55} [2023-08-04 08:30:20,790 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-08-04 08:30:20,790 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 55 transitions, 156 flow [2023-08-04 08:30:20,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 424.6666666666667) internal successors, (1274), 3 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:20,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:20,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:20,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 08:30:20,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:20,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:20,792 INFO L85 PathProgramCache]: Analyzing trace with hash 791314143, now seen corresponding path program 1 times [2023-08-04 08:30:20,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:20,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989452713] [2023-08-04 08:30:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:20,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:20,884 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 08:30:20,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:20,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989452713] [2023-08-04 08:30:20,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989452713] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:20,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911479444] [2023-08-04 08:30:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:20,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:20,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:20,893 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 08:30:20,904 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 08:30:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:21,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:30:21,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:21,413 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 08:30:21,413 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:30:21,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911479444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:21,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:30:21,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:30:21,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137635096] [2023-08-04 08:30:21,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:21,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:21,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:30:21,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 419 out of 1052 [2023-08-04 08:30:21,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 55 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 425.6666666666667) internal successors, (1277), 3 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:21,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:21,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 419 of 1052 [2023-08-04 08:30:21,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:22,306 INFO L124 PetriNetUnfolderBase]: 585/828 cut-off events. [2023-08-04 08:30:22,306 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 08:30:22,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1696 conditions, 828 events. 585/828 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2249 event pairs, 112 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 1642. Up to 729 conditions per place. [2023-08-04 08:30:22,310 INFO L140 encePairwiseOnDemand]: 1049/1052 looper letters, 65 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-04 08:30:22,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 70 transitions, 322 flow [2023-08-04 08:30:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1322 transitions. [2023-08-04 08:30:22,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188846641318124 [2023-08-04 08:30:22,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1322 transitions. [2023-08-04 08:30:22,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1322 transitions. [2023-08-04 08:30:22,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:22,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1322 transitions. [2023-08-04 08:30:22,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 440.6666666666667) internal successors, (1322), 3 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:22,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:22,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:22,328 INFO L175 Difference]: Start difference. First operand has 39 places, 55 transitions, 156 flow. Second operand 3 states and 1322 transitions. [2023-08-04 08:30:22,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 70 transitions, 322 flow [2023-08-04 08:30:22,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 70 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:30:22,330 INFO L231 Difference]: Finished difference. Result has 40 places, 55 transitions, 160 flow [2023-08-04 08:30:22,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1052, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=40, PETRI_TRANSITIONS=55} [2023-08-04 08:30:22,331 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-04 08:30:22,331 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 55 transitions, 160 flow [2023-08-04 08:30:22,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 425.6666666666667) internal successors, (1277), 3 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:22,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:22,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:22,340 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 08:30:22,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:22,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:22,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:22,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1822735038, now seen corresponding path program 1 times [2023-08-04 08:30:22,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:22,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730710335] [2023-08-04 08:30:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:22,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:22,658 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 08:30:22,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:22,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730710335] [2023-08-04 08:30:22,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730710335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:22,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897984443] [2023-08-04 08:30:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:22,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:22,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:22,661 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 08:30:22,663 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 08:30:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:23,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:30:23,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:30:23,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:30:23,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897984443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:23,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:30:23,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:30:23,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526460623] [2023-08-04 08:30:23,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:23,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:23,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:23,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:30:23,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 419 out of 1052 [2023-08-04 08:30:23,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 55 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 426.6666666666667) internal successors, (1280), 3 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 08:30:23,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:23,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 419 of 1052 [2023-08-04 08:30:23,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:23,793 INFO L124 PetriNetUnfolderBase]: 395/574 cut-off events. [2023-08-04 08:30:23,793 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-04 08:30:23,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1236 conditions, 574 events. 395/574 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1414 event pairs, 102 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 1181. Up to 399 conditions per place. [2023-08-04 08:30:23,795 INFO L140 encePairwiseOnDemand]: 1049/1052 looper letters, 69 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 08:30:23,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 342 flow [2023-08-04 08:30:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1325 transitions. [2023-08-04 08:30:23,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41983523447401777 [2023-08-04 08:30:23,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1325 transitions. [2023-08-04 08:30:23,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1325 transitions. [2023-08-04 08:30:23,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:23,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1325 transitions. [2023-08-04 08:30:23,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 441.6666666666667) internal successors, (1325), 3 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:23,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:23,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:23,809 INFO L175 Difference]: Start difference. First operand has 40 places, 55 transitions, 160 flow. Second operand 3 states and 1325 transitions. [2023-08-04 08:30:23,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 342 flow [2023-08-04 08:30:23,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 338 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:30:23,811 INFO L231 Difference]: Finished difference. Result has 41 places, 56 transitions, 168 flow [2023-08-04 08:30:23,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1052, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=41, PETRI_TRANSITIONS=56} [2023-08-04 08:30:23,812 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-04 08:30:23,812 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 56 transitions, 168 flow [2023-08-04 08:30:23,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 426.6666666666667) internal successors, (1280), 3 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 08:30:23,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:23,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:23,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 08:30:24,020 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,SelfDestructingSolverStorable3 [2023-08-04 08:30:24,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:24,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1613714324, now seen corresponding path program 1 times [2023-08-04 08:30:24,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:24,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517650483] [2023-08-04 08:30:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:24,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:30:24,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:24,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517650483] [2023-08-04 08:30:24,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517650483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:24,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568390631] [2023-08-04 08:30:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:24,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:24,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:24,197 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 08:30:24,216 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 08:30:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:24,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:30:24,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:30:24,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:30:24,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568390631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:24,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:30:24,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:30:24,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011845988] [2023-08-04 08:30:24,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:24,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:24,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:30:24,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 419 out of 1052 [2023-08-04 08:30:24,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 56 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 428.0) internal successors, (1284), 3 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:24,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:24,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 419 of 1052 [2023-08-04 08:30:24,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:25,439 INFO L124 PetriNetUnfolderBase]: 380/553 cut-off events. [2023-08-04 08:30:25,440 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-08-04 08:30:25,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1217 conditions, 553 events. 380/553 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1310 event pairs, 139 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 1161. Up to 496 conditions per place. [2023-08-04 08:30:25,442 INFO L140 encePairwiseOnDemand]: 1049/1052 looper letters, 65 selfloop transitions, 2 changer transitions 2/71 dead transitions. [2023-08-04 08:30:25,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 71 transitions, 336 flow [2023-08-04 08:30:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1322 transitions. [2023-08-04 08:30:25,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188846641318124 [2023-08-04 08:30:25,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1322 transitions. [2023-08-04 08:30:25,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1322 transitions. [2023-08-04 08:30:25,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:25,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1322 transitions. [2023-08-04 08:30:25,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 440.6666666666667) internal successors, (1322), 3 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:25,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:25,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:25,457 INFO L175 Difference]: Start difference. First operand has 41 places, 56 transitions, 168 flow. Second operand 3 states and 1322 transitions. [2023-08-04 08:30:25,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 71 transitions, 336 flow [2023-08-04 08:30:25,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 71 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:30:25,459 INFO L231 Difference]: Finished difference. Result has 43 places, 55 transitions, 170 flow [2023-08-04 08:30:25,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1052, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=43, PETRI_TRANSITIONS=55} [2023-08-04 08:30:25,460 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2023-08-04 08:30:25,460 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 55 transitions, 170 flow [2023-08-04 08:30:25,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 428.0) internal successors, (1284), 3 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:25,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:25,461 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] [2023-08-04 08:30:25,471 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 08:30:25,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:25,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:25,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:25,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1821206572, now seen corresponding path program 1 times [2023-08-04 08:30:25,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:25,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933699450] [2023-08-04 08:30:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:25,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:30:25,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:25,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933699450] [2023-08-04 08:30:25,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933699450] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932758238] [2023-08-04 08:30:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:25,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:25,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:25,910 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 08:30:25,913 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 08:30:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:26,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:30:26,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:30:26,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:30:26,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932758238] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:26,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:30:26,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:30:26,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646289854] [2023-08-04 08:30:26,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:26,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:30:26,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 391 out of 1052 [2023-08-04 08:30:26,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 55 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 401.3333333333333) internal successors, (1204), 3 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:26,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:26,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 391 of 1052 [2023-08-04 08:30:26,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:27,259 INFO L124 PetriNetUnfolderBase]: 380/553 cut-off events. [2023-08-04 08:30:27,260 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-08-04 08:30:27,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 553 events. 380/553 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1295 event pairs, 151 based on Foata normal form. 2/329 useless extension candidates. Maximal degree in co-relation 1158. Up to 540 conditions per place. [2023-08-04 08:30:27,262 INFO L140 encePairwiseOnDemand]: 1042/1052 looper letters, 49 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2023-08-04 08:30:27,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 292 flow [2023-08-04 08:30:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1230 transitions. [2023-08-04 08:30:27,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897338403041825 [2023-08-04 08:30:27,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1230 transitions. [2023-08-04 08:30:27,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1230 transitions. [2023-08-04 08:30:27,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:27,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1230 transitions. [2023-08-04 08:30:27,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 410.0) internal successors, (1230), 3 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:27,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:27,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1052.0) internal successors, (4208), 4 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:27,279 INFO L175 Difference]: Start difference. First operand has 43 places, 55 transitions, 170 flow. Second operand 3 states and 1230 transitions. [2023-08-04 08:30:27,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 292 flow [2023-08-04 08:30:27,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:30:27,282 INFO L231 Difference]: Finished difference. Result has 44 places, 59 transitions, 210 flow [2023-08-04 08:30:27,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1052, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=44, PETRI_TRANSITIONS=59} [2023-08-04 08:30:27,283 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2023-08-04 08:30:27,283 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 59 transitions, 210 flow [2023-08-04 08:30:27,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 401.3333333333333) internal successors, (1204), 3 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:27,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:27,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:27,290 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 08:30:27,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:27,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:27,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:27,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1484805246, now seen corresponding path program 1 times [2023-08-04 08:30:27,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:27,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425742704] [2023-08-04 08:30:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:27,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:30:27,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:27,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425742704] [2023-08-04 08:30:27,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425742704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:27,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780165915] [2023-08-04 08:30:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:27,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:27,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:27,673 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 08:30:27,701 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 08:30:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:28,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:30:28,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:30:28,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:30:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:30:28,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780165915] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:30:28,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:30:28,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:30:28,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308127722] [2023-08-04 08:30:28,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:30:28,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:30:28,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:28,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:30:28,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:30:28,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 1052 [2023-08-04 08:30:28,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 59 transitions, 210 flow. Second operand has 8 states, 8 states have (on average 377.5) internal successors, (3020), 8 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:28,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:28,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 1052 [2023-08-04 08:30:28,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:28,860 INFO L124 PetriNetUnfolderBase]: 26/72 cut-off events. [2023-08-04 08:30:28,861 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 08:30:28,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 72 events. 26/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 17/74 useless extension candidates. Maximal degree in co-relation 196. Up to 23 conditions per place. [2023-08-04 08:30:28,861 INFO L140 encePairwiseOnDemand]: 1033/1052 looper letters, 0 selfloop transitions, 0 changer transitions 59/59 dead transitions. [2023-08-04 08:30:28,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 59 transitions, 334 flow [2023-08-04 08:30:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:30:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:30:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 3036 transitions. [2023-08-04 08:30:28,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36074144486692017 [2023-08-04 08:30:28,868 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 3036 transitions. [2023-08-04 08:30:28,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 3036 transitions. [2023-08-04 08:30:28,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:28,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 3036 transitions. [2023-08-04 08:30:28,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 379.5) internal successors, (3036), 8 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:28,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1052.0) internal successors, (9468), 9 states have internal predecessors, (9468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:28,885 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1052.0) internal successors, (9468), 9 states have internal predecessors, (9468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:28,885 INFO L175 Difference]: Start difference. First operand has 44 places, 59 transitions, 210 flow. Second operand 8 states and 3036 transitions. [2023-08-04 08:30:28,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 59 transitions, 334 flow [2023-08-04 08:30:28,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 59 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:30:28,887 INFO L231 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2023-08-04 08:30:28,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1052, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=32, PETRI_TRANSITIONS=0} [2023-08-04 08:30:28,888 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-08-04 08:30:28,888 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 0 transitions, 0 flow [2023-08-04 08:30:28,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 377.5) internal successors, (3020), 8 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:28,892 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:30:28,903 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 08:30:29,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:29,101 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:29,102 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:30:29,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 429 places, 485 transitions, 992 flow [2023-08-04 08:30:29,203 INFO L124 PetriNetUnfolderBase]: 88/670 cut-off events. [2023-08-04 08:30:29,203 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:30:29,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 670 events. 88/670 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1948 event pairs, 0 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 465. Up to 14 conditions per place. [2023-08-04 08:30:29,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 429 places, 485 transitions, 992 flow [2023-08-04 08:30:29,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 429 places, 485 transitions, 992 flow [2023-08-04 08:30:29,210 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:30:29,211 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 429 places, 485 transitions, 992 flow [2023-08-04 08:30:29,211 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 429 places, 485 transitions, 992 flow [2023-08-04 08:30:29,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 429 places, 485 transitions, 992 flow [2023-08-04 08:30:29,301 INFO L124 PetriNetUnfolderBase]: 88/670 cut-off events. [2023-08-04 08:30:29,301 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:30:29,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 670 events. 88/670 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1948 event pairs, 0 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 465. Up to 14 conditions per place. [2023-08-04 08:30:29,315 INFO L119 LiptonReduction]: Number of co-enabled transitions 18150 [2023-08-04 08:31:22,915 INFO L134 LiptonReduction]: Checked pairs total: 19453 [2023-08-04 08:31:22,916 INFO L136 LiptonReduction]: Total number of compositions: 565 [2023-08-04 08:31:22,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:31:22,918 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;@1886006, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:31:22,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:31:22,938 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:31:22,938 INFO L124 PetriNetUnfolderBase]: 16/50 cut-off events. [2023-08-04 08:31:22,938 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:31:22,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:22,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:22,939 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:22,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:22,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1632064378, now seen corresponding path program 1 times [2023-08-04 08:31:22,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:22,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751719940] [2023-08-04 08:31:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:22,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:23,018 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 08:31:23,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:23,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751719940] [2023-08-04 08:31:23,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751719940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:23,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:31:23,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:31:23,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945673179] [2023-08-04 08:31:23,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:23,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:23,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:23,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:23,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:31:23,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 391 out of 1050 [2023-08-04 08:31:23,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 54 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:23,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:23,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 391 of 1050 [2023-08-04 08:31:23,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:24,060 INFO L124 PetriNetUnfolderBase]: 612/878 cut-off events. [2023-08-04 08:31:24,061 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 08:31:24,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1774 conditions, 878 events. 612/878 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2690 event pairs, 240 based on Foata normal form. 0/446 useless extension candidates. Maximal degree in co-relation 1432. Up to 848 conditions per place. [2023-08-04 08:31:24,063 INFO L140 encePairwiseOnDemand]: 1040/1050 looper letters, 34 selfloop transitions, 8 changer transitions 13/57 dead transitions. [2023-08-04 08:31:24,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 57 transitions, 242 flow [2023-08-04 08:31:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1231 transitions. [2023-08-04 08:31:24,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907936507936508 [2023-08-04 08:31:24,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1231 transitions. [2023-08-04 08:31:24,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1231 transitions. [2023-08-04 08:31:24,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:24,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1231 transitions. [2023-08-04 08:31:24,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 410.3333333333333) internal successors, (1231), 3 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:24,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1050.0) internal successors, (4200), 4 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:24,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1050.0) internal successors, (4200), 4 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:24,074 INFO L175 Difference]: Start difference. First operand has 39 places, 54 transitions, 130 flow. Second operand 3 states and 1231 transitions. [2023-08-04 08:31:24,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 57 transitions, 242 flow [2023-08-04 08:31:24,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 242 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:31:24,075 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 132 flow [2023-08-04 08:31:24,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1050, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2023-08-04 08:31:24,076 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-04 08:31:24,076 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 132 flow [2023-08-04 08:31:24,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:24,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:24,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:24,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:31:24,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:24,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash 489758799, now seen corresponding path program 1 times [2023-08-04 08:31:24,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:24,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914065703] [2023-08-04 08:31:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:24,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:31:24,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:24,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914065703] [2023-08-04 08:31:24,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914065703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:24,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:31:24,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:31:24,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481046448] [2023-08-04 08:31:24,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:24,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:24,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:24,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:24,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:31:24,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 391 out of 1050 [2023-08-04 08:31:24,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 396.3333333333333) internal successors, (1189), 3 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:24,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:24,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 391 of 1050 [2023-08-04 08:31:24,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:24,788 INFO L124 PetriNetUnfolderBase]: 214/321 cut-off events. [2023-08-04 08:31:24,788 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:31:24,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 321 events. 214/321 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 812 event pairs, 78 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 626. Up to 311 conditions per place. [2023-08-04 08:31:24,791 INFO L140 encePairwiseOnDemand]: 1045/1050 looper letters, 40 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-04 08:31:24,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 46 transitions, 224 flow [2023-08-04 08:31:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1215 transitions. [2023-08-04 08:31:24,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2023-08-04 08:31:24,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1215 transitions. [2023-08-04 08:31:24,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1215 transitions. [2023-08-04 08:31:24,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:24,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1215 transitions. [2023-08-04 08:31:24,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 405.0) internal successors, (1215), 3 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:24,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1050.0) internal successors, (4200), 4 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:24,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1050.0) internal successors, (4200), 4 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:24,802 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 132 flow. Second operand 3 states and 1215 transitions. [2023-08-04 08:31:24,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 46 transitions, 224 flow [2023-08-04 08:31:24,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:24,804 INFO L231 Difference]: Finished difference. Result has 34 places, 46 transitions, 146 flow [2023-08-04 08:31:24,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1050, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=34, PETRI_TRANSITIONS=46} [2023-08-04 08:31:24,806 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-08-04 08:31:24,806 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 46 transitions, 146 flow [2023-08-04 08:31:24,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 396.3333333333333) internal successors, (1189), 3 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:24,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:24,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:24,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:31:24,807 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:24,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:24,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1152511487, now seen corresponding path program 1 times [2023-08-04 08:31:24,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:24,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271981645] [2023-08-04 08:31:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:24,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:31:24,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271981645] [2023-08-04 08:31:24,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271981645] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:24,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909664417] [2023-08-04 08:31:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:24,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:24,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:24,953 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 08:31:24,958 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 08:31:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:25,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:31:25,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:31:25,621 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:25,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909664417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:25,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:25,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:31:25,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646805263] [2023-08-04 08:31:25,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:25,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:25,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:25,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 391 out of 1050 [2023-08-04 08:31:25,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 46 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:25,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:25,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 391 of 1050 [2023-08-04 08:31:25,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:26,234 INFO L124 PetriNetUnfolderBase]: 214/323 cut-off events. [2023-08-04 08:31:26,234 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:31:26,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 323 events. 214/323 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 812 event pairs, 78 based on Foata normal form. 1/186 useless extension candidates. Maximal degree in co-relation 628. Up to 311 conditions per place. [2023-08-04 08:31:26,236 INFO L140 encePairwiseOnDemand]: 1041/1050 looper letters, 38 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2023-08-04 08:31:26,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 242 flow [2023-08-04 08:31:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1217 transitions. [2023-08-04 08:31:26,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38634920634920633 [2023-08-04 08:31:26,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1217 transitions. [2023-08-04 08:31:26,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1217 transitions. [2023-08-04 08:31:26,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:26,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1217 transitions. [2023-08-04 08:31:26,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 405.6666666666667) internal successors, (1217), 3 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:26,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1050.0) internal successors, (4200), 4 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:26,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1050.0) internal successors, (4200), 4 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:26,246 INFO L175 Difference]: Start difference. First operand has 34 places, 46 transitions, 146 flow. Second operand 3 states and 1217 transitions. [2023-08-04 08:31:26,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 242 flow [2023-08-04 08:31:26,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 48 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:26,247 INFO L231 Difference]: Finished difference. Result has 36 places, 48 transitions, 176 flow [2023-08-04 08:31:26,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1050, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=36, PETRI_TRANSITIONS=48} [2023-08-04 08:31:26,248 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2023-08-04 08:31:26,248 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 48 transitions, 176 flow [2023-08-04 08:31:26,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:26,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:26,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:26,263 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 08:31:26,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:26,458 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:26,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:26,459 INFO L85 PathProgramCache]: Analyzing trace with hash -617740437, now seen corresponding path program 1 times [2023-08-04 08:31:26,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:26,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567730662] [2023-08-04 08:31:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:26,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 08:31:26,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567730662] [2023-08-04 08:31:26,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567730662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:26,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823212316] [2023-08-04 08:31:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:26,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:26,571 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 08:31:26,583 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 08:31:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:27,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:31:27,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 08:31:27,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 08:31:27,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823212316] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:27,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:27,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:31:27,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255101681] [2023-08-04 08:31:27,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:27,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:31:27,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:27,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:31:27,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:31:27,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 1050 [2023-08-04 08:31:27,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 48 transitions, 176 flow. Second operand has 8 states, 8 states have (on average 378.75) internal successors, (3030), 8 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:27,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:27,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 1050 [2023-08-04 08:31:27,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:27,977 INFO L124 PetriNetUnfolderBase]: 214/347 cut-off events. [2023-08-04 08:31:27,977 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 08:31:27,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 347 events. 214/347 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 812 event pairs, 78 based on Foata normal form. 12/222 useless extension candidates. Maximal degree in co-relation 649. Up to 307 conditions per place. [2023-08-04 08:31:27,979 INFO L140 encePairwiseOnDemand]: 1033/1050 looper letters, 30 selfloop transitions, 40 changer transitions 0/72 dead transitions. [2023-08-04 08:31:27,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 72 transitions, 412 flow [2023-08-04 08:31:27,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:31:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:31:27,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 3094 transitions. [2023-08-04 08:31:27,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36833333333333335 [2023-08-04 08:31:27,984 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 3094 transitions. [2023-08-04 08:31:27,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 3094 transitions. [2023-08-04 08:31:27,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:27,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 3094 transitions. [2023-08-04 08:31:27,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 386.75) internal successors, (3094), 8 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:27,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1050.0) internal successors, (9450), 9 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:27,997 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1050.0) internal successors, (9450), 9 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:27,997 INFO L175 Difference]: Start difference. First operand has 36 places, 48 transitions, 176 flow. Second operand 8 states and 3094 transitions. [2023-08-04 08:31:27,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 72 transitions, 412 flow [2023-08-04 08:31:27,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 72 transitions, 404 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:27,999 INFO L231 Difference]: Finished difference. Result has 45 places, 72 transitions, 406 flow [2023-08-04 08:31:27,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1050, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=406, PETRI_PLACES=45, PETRI_TRANSITIONS=72} [2023-08-04 08:31:28,000 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2023-08-04 08:31:28,000 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 72 transitions, 406 flow [2023-08-04 08:31:28,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 378.75) internal successors, (3030), 8 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:28,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:28,001 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:28,017 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 08:31:28,210 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 08:31:28,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:28,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:28,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1503352134, now seen corresponding path program 2 times [2023-08-04 08:31:28,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:28,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963106764] [2023-08-04 08:31:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:28,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-08-04 08:31:28,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:28,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963106764] [2023-08-04 08:31:28,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963106764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:28,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702413334] [2023-08-04 08:31:28,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:31:28,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:28,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:28,516 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:28,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:31:29,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:31:29,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:31:29,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:31:29,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-08-04 08:31:29,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-08-04 08:31:29,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702413334] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:29,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:29,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-04 08:31:29,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022068537] [2023-08-04 08:31:29,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:29,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 08:31:29,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:29,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 08:31:29,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=156, Unknown=0, NotChecked=0, Total=272 [2023-08-04 08:31:30,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 1050 [2023-08-04 08:31:30,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 72 transitions, 406 flow. Second operand has 17 states, 17 states have (on average 377.7647058823529) internal successors, (6422), 17 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:30,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:30,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 1050 [2023-08-04 08:31:30,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:30,639 INFO L124 PetriNetUnfolderBase]: 214/361 cut-off events. [2023-08-04 08:31:30,640 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 08:31:30,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899 conditions, 361 events. 214/361 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 812 event pairs, 78 based on Foata normal form. 13/237 useless extension candidates. Maximal degree in co-relation 715. Up to 307 conditions per place. [2023-08-04 08:31:30,641 INFO L140 encePairwiseOnDemand]: 1033/1050 looper letters, 30 selfloop transitions, 54 changer transitions 0/86 dead transitions. [2023-08-04 08:31:30,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 86 transitions, 658 flow [2023-08-04 08:31:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-04 08:31:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-04 08:31:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 6473 transitions. [2023-08-04 08:31:30,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3626330532212885 [2023-08-04 08:31:30,652 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 6473 transitions. [2023-08-04 08:31:30,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 6473 transitions. [2023-08-04 08:31:30,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:30,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 6473 transitions. [2023-08-04 08:31:30,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 380.7647058823529) internal successors, (6473), 17 states have internal predecessors, (6473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:30,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 1050.0) internal successors, (18900), 18 states have internal predecessors, (18900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:30,683 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 1050.0) internal successors, (18900), 18 states have internal predecessors, (18900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:30,683 INFO L175 Difference]: Start difference. First operand has 45 places, 72 transitions, 406 flow. Second operand 17 states and 6473 transitions. [2023-08-04 08:31:30,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 86 transitions, 658 flow [2023-08-04 08:31:30,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 558 flow, removed 34 selfloop flow, removed 4 redundant places. [2023-08-04 08:31:30,687 INFO L231 Difference]: Finished difference. Result has 64 places, 86 transitions, 578 flow [2023-08-04 08:31:30,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1050, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=578, PETRI_PLACES=64, PETRI_TRANSITIONS=86} [2023-08-04 08:31:30,687 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2023-08-04 08:31:30,687 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 86 transitions, 578 flow [2023-08-04 08:31:30,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 377.7647058823529) internal successors, (6422), 17 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:30,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:30,689 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:30,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:30,899 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 08:31:30,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:30,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1804279858, now seen corresponding path program 3 times [2023-08-04 08:31:30,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:30,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669494481] [2023-08-04 08:31:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:30,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-08-04 08:31:31,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:31,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669494481] [2023-08-04 08:31:31,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669494481] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506403656] [2023-08-04 08:31:31,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 08:31:31,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:31,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:31,381 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:31,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:31:36,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-04 08:31:36,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:31:36,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-04 08:31:36,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-08-04 08:31:37,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-08-04 08:31:37,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506403656] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:37,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:37,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2023-08-04 08:31:37,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155358759] [2023-08-04 08:31:37,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:37,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-04 08:31:37,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:37,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-04 08:31:37,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=722, Unknown=0, NotChecked=0, Total=1190 [2023-08-04 08:31:38,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 1050 [2023-08-04 08:31:38,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 86 transitions, 578 flow. Second operand has 35 states, 35 states have (on average 376.57142857142856) internal successors, (13180), 35 states have internal predecessors, (13180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:38,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:38,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 1050 [2023-08-04 08:31:38,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:39,187 INFO L124 PetriNetUnfolderBase]: 214/367 cut-off events. [2023-08-04 08:31:39,187 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2023-08-04 08:31:39,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 367 events. 214/367 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 833 event pairs, 78 based on Foata normal form. 3/236 useless extension candidates. Maximal degree in co-relation 898. Up to 307 conditions per place. [2023-08-04 08:31:39,190 INFO L140 encePairwiseOnDemand]: 1033/1050 looper letters, 30 selfloop transitions, 60 changer transitions 0/92 dead transitions. [2023-08-04 08:31:39,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 92 transitions, 806 flow [2023-08-04 08:31:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-04 08:31:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-04 08:31:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 6846 transitions. [2023-08-04 08:31:39,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3622222222222222 [2023-08-04 08:31:39,198 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 6846 transitions. [2023-08-04 08:31:39,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 6846 transitions. [2023-08-04 08:31:39,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:39,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 6846 transitions. [2023-08-04 08:31:39,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 380.3333333333333) internal successors, (6846), 18 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:39,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 1050.0) internal successors, (19950), 19 states have internal predecessors, (19950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:39,219 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 1050.0) internal successors, (19950), 19 states have internal predecessors, (19950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:39,219 INFO L175 Difference]: Start difference. First operand has 64 places, 86 transitions, 578 flow. Second operand 18 states and 6846 transitions. [2023-08-04 08:31:39,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 92 transitions, 806 flow [2023-08-04 08:31:39,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 92 transitions, 750 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-04 08:31:39,223 INFO L231 Difference]: Finished difference. Result has 81 places, 92 transitions, 736 flow [2023-08-04 08:31:39,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1050, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=736, PETRI_PLACES=81, PETRI_TRANSITIONS=92} [2023-08-04 08:31:39,224 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 42 predicate places. [2023-08-04 08:31:39,224 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 92 transitions, 736 flow [2023-08-04 08:31:39,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 376.57142857142856) internal successors, (13180), 35 states have internal predecessors, (13180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:39,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:39,225 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:39,238 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 08:31:39,426 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 08:31:39,426 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:31:39,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash 663051426, now seen corresponding path program 4 times [2023-08-04 08:31:39,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:39,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146314674] [2023-08-04 08:31:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:39,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:31:39,729 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:31:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:31:39,972 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:31:39,972 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:31:39,972 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:31:39,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:31:39,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 08:31:39,973 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2023-08-04 08:31:39,973 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:31:39,974 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:31:39,974 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:31:40,278 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:31:40,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 525 places, 601 transitions, 1250 flow [2023-08-04 08:31:40,597 INFO L124 PetriNetUnfolderBase]: 229/1470 cut-off events. [2023-08-04 08:31:40,597 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:31:40,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1567 conditions, 1470 events. 229/1470 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 7474 event pairs, 1 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 996. Up to 32 conditions per place. [2023-08-04 08:31:40,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 525 places, 601 transitions, 1250 flow [2023-08-04 08:31:40,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 525 places, 601 transitions, 1250 flow [2023-08-04 08:31:40,639 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:31:40,639 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 525 places, 601 transitions, 1250 flow [2023-08-04 08:31:40,639 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 525 places, 601 transitions, 1250 flow [2023-08-04 08:31:40,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 525 places, 601 transitions, 1250 flow [2023-08-04 08:31:40,926 INFO L124 PetriNetUnfolderBase]: 229/1470 cut-off events. [2023-08-04 08:31:40,926 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:31:40,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1567 conditions, 1470 events. 229/1470 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 7474 event pairs, 1 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 996. Up to 32 conditions per place. [2023-08-04 08:31:40,995 INFO L119 LiptonReduction]: Number of co-enabled transitions 62700 [2023-08-04 08:33:08,954 INFO L134 LiptonReduction]: Checked pairs total: 77898 [2023-08-04 08:33:08,954 INFO L136 LiptonReduction]: Total number of compositions: 715 [2023-08-04 08:33:08,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:33:08,956 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;@1886006, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:33:08,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:33:09,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:33:09,017 INFO L124 PetriNetUnfolderBase]: 12/35 cut-off events. [2023-08-04 08:33:09,017 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:33:09,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:09,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:09,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:09,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:09,018 INFO L85 PathProgramCache]: Analyzing trace with hash -848285878, now seen corresponding path program 1 times [2023-08-04 08:33:09,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:09,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152625433] [2023-08-04 08:33:09,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:09,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:09,092 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 08:33:09,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:09,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152625433] [2023-08-04 08:33:09,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152625433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:09,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:33:09,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:33:09,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699507571] [2023-08-04 08:33:09,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:09,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:09,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:09,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:09,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:33:09,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1316 [2023-08-04 08:33:09,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 76 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 479.3333333333333) internal successors, (1438), 3 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:09,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:09,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1316 [2023-08-04 08:33:09,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:45,105 INFO L124 PetriNetUnfolderBase]: 29474/35536 cut-off events. [2023-08-04 08:33:45,105 INFO L125 PetriNetUnfolderBase]: For 2205/2205 co-relation queries the response was YES. [2023-08-04 08:33:45,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71641 conditions, 35536 events. 29474/35536 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 129867 event pairs, 12106 based on Foata normal form. 0/17232 useless extension candidates. Maximal degree in co-relation 17948. Up to 34710 conditions per place. [2023-08-04 08:33:45,261 INFO L140 encePairwiseOnDemand]: 1310/1316 looper letters, 67 selfloop transitions, 4 changer transitions 2/77 dead transitions. [2023-08-04 08:33:45,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 77 transitions, 344 flow [2023-08-04 08:33:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:33:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:33:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1499 transitions. [2023-08-04 08:33:45,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37968591691995945 [2023-08-04 08:33:45,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1499 transitions. [2023-08-04 08:33:45,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1499 transitions. [2023-08-04 08:33:45,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:45,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1499 transitions. [2023-08-04 08:33:45,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 499.6666666666667) internal successors, (1499), 3 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:45,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:45,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:45,272 INFO L175 Difference]: Start difference. First operand has 53 places, 76 transitions, 200 flow. Second operand 3 states and 1499 transitions. [2023-08-04 08:33:45,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 77 transitions, 344 flow [2023-08-04 08:33:45,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 344 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:33:45,278 INFO L231 Difference]: Finished difference. Result has 55 places, 75 transitions, 208 flow [2023-08-04 08:33:45,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1316, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=55, PETRI_TRANSITIONS=75} [2023-08-04 08:33:45,279 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-04 08:33:45,279 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 75 transitions, 208 flow [2023-08-04 08:33:45,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 479.3333333333333) internal successors, (1438), 3 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:45,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:45,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:45,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 08:33:45,280 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:45,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1069489401, now seen corresponding path program 1 times [2023-08-04 08:33:45,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:45,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244210231] [2023-08-04 08:33:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:45,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:45,344 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 08:33:45,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:45,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244210231] [2023-08-04 08:33:45,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244210231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:45,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:33:45,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:33:45,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579387852] [2023-08-04 08:33:45,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:45,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:45,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:45,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:33:45,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 1316 [2023-08-04 08:33:45,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 75 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 508.0) internal successors, (1524), 3 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:45,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:45,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 1316 [2023-08-04 08:33:45,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:20,697 INFO L124 PetriNetUnfolderBase]: 29279/35165 cut-off events. [2023-08-04 08:34:20,697 INFO L125 PetriNetUnfolderBase]: For 2087/2087 co-relation queries the response was YES. [2023-08-04 08:34:20,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70930 conditions, 35165 events. 29279/35165 cut-off events. For 2087/2087 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 126220 event pairs, 8831 based on Foata normal form. 0/16978 useless extension candidates. Maximal degree in co-relation 70881. Up to 34445 conditions per place. [2023-08-04 08:34:20,878 INFO L140 encePairwiseOnDemand]: 1313/1316 looper letters, 78 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-04 08:34:20,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 386 flow [2023-08-04 08:34:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1588 transitions. [2023-08-04 08:34:20,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022289766970618 [2023-08-04 08:34:20,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1588 transitions. [2023-08-04 08:34:20,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1588 transitions. [2023-08-04 08:34:20,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:20,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1588 transitions. [2023-08-04 08:34:20,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 529.3333333333334) internal successors, (1588), 3 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:20,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:20,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:20,887 INFO L175 Difference]: Start difference. First operand has 55 places, 75 transitions, 208 flow. Second operand 3 states and 1588 transitions. [2023-08-04 08:34:20,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 386 flow [2023-08-04 08:34:20,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 84 transitions, 376 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:34:20,895 INFO L231 Difference]: Finished difference. Result has 53 places, 76 transitions, 210 flow [2023-08-04 08:34:20,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1316, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=210, PETRI_PLACES=53, PETRI_TRANSITIONS=76} [2023-08-04 08:34:20,896 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2023-08-04 08:34:20,896 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 76 transitions, 210 flow [2023-08-04 08:34:20,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 508.0) internal successors, (1524), 3 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:20,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:20,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:20,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 08:34:20,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:20,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1605352003, now seen corresponding path program 1 times [2023-08-04 08:34:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:20,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001073047] [2023-08-04 08:34:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:20,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:20,967 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 08:34:20,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:20,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001073047] [2023-08-04 08:34:20,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001073047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:20,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983243166] [2023-08-04 08:34:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:20,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:20,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:20,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:20,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:34:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:21,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:34:21,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:21,975 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 08:34:21,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:21,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983243166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:21,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:21,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:34:21,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997031797] [2023-08-04 08:34:21,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:21,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:21,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:21,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:21,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:21,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 1316 [2023-08-04 08:34:21,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 76 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 509.0) internal successors, (1527), 3 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:21,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:21,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 1316 [2023-08-04 08:34:21,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:55,899 INFO L124 PetriNetUnfolderBase]: 29259/35277 cut-off events. [2023-08-04 08:34:55,900 INFO L125 PetriNetUnfolderBase]: For 914/914 co-relation queries the response was YES. [2023-08-04 08:34:55,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70982 conditions, 35277 events. 29259/35277 cut-off events. For 914/914 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 127469 event pairs, 8806 based on Foata normal form. 0/17106 useless extension candidates. Maximal degree in co-relation 70927. Up to 33857 conditions per place. [2023-08-04 08:34:56,038 INFO L140 encePairwiseOnDemand]: 1313/1316 looper letters, 93 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-04 08:34:56,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 99 transitions, 446 flow [2023-08-04 08:34:56,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1602 transitions. [2023-08-04 08:34:56,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40577507598784196 [2023-08-04 08:34:56,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1602 transitions. [2023-08-04 08:34:56,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1602 transitions. [2023-08-04 08:34:56,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:56,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1602 transitions. [2023-08-04 08:34:56,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 534.0) internal successors, (1602), 3 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:56,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:56,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:56,047 INFO L175 Difference]: Start difference. First operand has 53 places, 76 transitions, 210 flow. Second operand 3 states and 1602 transitions. [2023-08-04 08:34:56,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 99 transitions, 446 flow [2023-08-04 08:34:56,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 99 transitions, 444 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:34:56,050 INFO L231 Difference]: Finished difference. Result has 55 places, 77 transitions, 220 flow [2023-08-04 08:34:56,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1316, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=52, 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=220, PETRI_PLACES=55, PETRI_TRANSITIONS=77} [2023-08-04 08:34:56,050 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-04 08:34:56,051 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 77 transitions, 220 flow [2023-08-04 08:34:56,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 509.0) internal successors, (1527), 3 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:56,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:56,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:56,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:34:56,261 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,SelfDestructingSolverStorable16 [2023-08-04 08:34:56,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:56,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2135053923, now seen corresponding path program 1 times [2023-08-04 08:34:56,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:56,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421406149] [2023-08-04 08:34:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:56,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:56,331 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 08:34:56,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:56,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421406149] [2023-08-04 08:34:56,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421406149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:56,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689970271] [2023-08-04 08:34:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:56,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:56,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:56,333 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:56,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:34:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:57,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:34:57,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:57,326 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 08:34:57,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:34:57,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689970271] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:34:57,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:34:57,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:34:57,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915420566] [2023-08-04 08:34:57,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:34:57,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:34:57,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:57,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:34:57,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:57,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 1316 [2023-08-04 08:34:57,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 77 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 510.0) internal successors, (1530), 3 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:57,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:57,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 1316 [2023-08-04 08:34:57,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:35:25,458 INFO L124 PetriNetUnfolderBase]: 23993/29195 cut-off events. [2023-08-04 08:35:25,459 INFO L125 PetriNetUnfolderBase]: For 1481/1481 co-relation queries the response was YES. [2023-08-04 08:35:25,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59731 conditions, 29195 events. 23993/29195 cut-off events. For 1481/1481 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 106003 event pairs, 7032 based on Foata normal form. 0/14776 useless extension candidates. Maximal degree in co-relation 59675. Up to 20683 conditions per place. [2023-08-04 08:35:25,562 INFO L140 encePairwiseOnDemand]: 1313/1316 looper letters, 105 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-04 08:35:25,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 111 transitions, 512 flow [2023-08-04 08:35:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:35:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:35:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1613 transitions. [2023-08-04 08:35:25,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085612968591692 [2023-08-04 08:35:25,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1613 transitions. [2023-08-04 08:35:25,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1613 transitions. [2023-08-04 08:35:25,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:35:25,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1613 transitions. [2023-08-04 08:35:25,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 537.6666666666666) internal successors, (1613), 3 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:25,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:25,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:25,571 INFO L175 Difference]: Start difference. First operand has 55 places, 77 transitions, 220 flow. Second operand 3 states and 1613 transitions. [2023-08-04 08:35:25,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 111 transitions, 512 flow [2023-08-04 08:35:25,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 111 transitions, 510 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:35:25,575 INFO L231 Difference]: Finished difference. Result has 57 places, 78 transitions, 230 flow [2023-08-04 08:35:25,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1316, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=54, 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=230, PETRI_PLACES=57, PETRI_TRANSITIONS=78} [2023-08-04 08:35:25,575 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2023-08-04 08:35:25,575 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 78 transitions, 230 flow [2023-08-04 08:35:25,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 510.0) internal successors, (1530), 3 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:25,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:35:25,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:35:25,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 08:35:25,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 08:35:25,787 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:35:25,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:35:25,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1220586916, now seen corresponding path program 1 times [2023-08-04 08:35:25,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:35:25,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146058329] [2023-08-04 08:35:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:35:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:25,907 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 08:35:25,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:35:25,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146058329] [2023-08-04 08:35:25,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146058329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:35:25,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203730494] [2023-08-04 08:35:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:25,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:35:25,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:35:25,910 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:35:25,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:35:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:26,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:35:26,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:35:26,918 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 08:35:26,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:35:26,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203730494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:35:26,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:35:26,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:35:26,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317256651] [2023-08-04 08:35:26,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:35:26,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:35:26,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:35:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:35:26,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:35:26,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 1316 [2023-08-04 08:35:26,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 78 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 511.3333333333333) internal successors, (1534), 3 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:26,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:35:26,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 1316 [2023-08-04 08:35:26,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:35:54,654 INFO L124 PetriNetUnfolderBase]: 23344/28550 cut-off events. [2023-08-04 08:35:54,654 INFO L125 PetriNetUnfolderBase]: For 3802/3802 co-relation queries the response was YES. [2023-08-04 08:35:54,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59967 conditions, 28550 events. 23344/28550 cut-off events. For 3802/3802 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 103197 event pairs, 8135 based on Foata normal form. 0/15092 useless extension candidates. Maximal degree in co-relation 59910. Up to 23097 conditions per place. [2023-08-04 08:35:54,791 INFO L140 encePairwiseOnDemand]: 1313/1316 looper letters, 106 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-08-04 08:35:54,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 112 transitions, 524 flow [2023-08-04 08:35:54,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:35:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:35:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1613 transitions. [2023-08-04 08:35:54,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085612968591692 [2023-08-04 08:35:54,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1613 transitions. [2023-08-04 08:35:54,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1613 transitions. [2023-08-04 08:35:54,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:35:54,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1613 transitions. [2023-08-04 08:35:54,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 537.6666666666666) internal successors, (1613), 3 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:54,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:54,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:54,803 INFO L175 Difference]: Start difference. First operand has 57 places, 78 transitions, 230 flow. Second operand 3 states and 1613 transitions. [2023-08-04 08:35:54,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 112 transitions, 524 flow [2023-08-04 08:35:54,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 112 transitions, 522 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:35:54,824 INFO L231 Difference]: Finished difference. Result has 59 places, 79 transitions, 240 flow [2023-08-04 08:35:54,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1316, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=56, 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=240, PETRI_PLACES=59, PETRI_TRANSITIONS=79} [2023-08-04 08:35:54,824 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2023-08-04 08:35:54,825 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 79 transitions, 240 flow [2023-08-04 08:35:54,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 511.3333333333333) internal successors, (1534), 3 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:54,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:35:54,825 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] [2023-08-04 08:35:54,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:35:55,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:35:55,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:35:55,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:35:55,038 INFO L85 PathProgramCache]: Analyzing trace with hash 927786214, now seen corresponding path program 1 times [2023-08-04 08:35:55,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:35:55,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746284462] [2023-08-04 08:35:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:55,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:35:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:55,171 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 08:35:55,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:35:55,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746284462] [2023-08-04 08:35:55,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746284462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:35:55,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987307562] [2023-08-04 08:35:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:55,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:35:55,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:35:55,173 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:35:55,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:35:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:56,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:35:56,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:35:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:35:56,274 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:35:56,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987307562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:35:56,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:35:56,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:35:56,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008765265] [2023-08-04 08:35:56,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:35:56,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:35:56,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:35:56,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:35:56,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:35:56,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1316 [2023-08-04 08:35:56,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 79 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 484.6666666666667) internal successors, (1454), 3 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:56,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:35:56,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1316 [2023-08-04 08:35:56,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:36:24,068 INFO L124 PetriNetUnfolderBase]: 23344/28552 cut-off events. [2023-08-04 08:36:24,068 INFO L125 PetriNetUnfolderBase]: For 3301/3301 co-relation queries the response was YES. [2023-08-04 08:36:24,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60353 conditions, 28552 events. 23344/28552 cut-off events. For 3301/3301 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 103272 event pairs, 9772 based on Foata normal form. 0/15207 useless extension candidates. Maximal degree in co-relation 60291. Up to 27857 conditions per place. [2023-08-04 08:36:24,178 INFO L140 encePairwiseOnDemand]: 1307/1316 looper letters, 69 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2023-08-04 08:36:24,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 398 flow [2023-08-04 08:36:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:36:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:36:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1500 transitions. [2023-08-04 08:36:24,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3799392097264438 [2023-08-04 08:36:24,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1500 transitions. [2023-08-04 08:36:24,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1500 transitions. [2023-08-04 08:36:24,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:36:24,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1500 transitions. [2023-08-04 08:36:24,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 500.0) internal successors, (1500), 3 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:24,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:24,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:24,185 INFO L175 Difference]: Start difference. First operand has 59 places, 79 transitions, 240 flow. Second operand 3 states and 1500 transitions. [2023-08-04 08:36:24,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 398 flow [2023-08-04 08:36:24,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:36:24,251 INFO L231 Difference]: Finished difference. Result has 61 places, 81 transitions, 272 flow [2023-08-04 08:36:24,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1316, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=61, PETRI_TRANSITIONS=81} [2023-08-04 08:36:24,252 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2023-08-04 08:36:24,252 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 81 transitions, 272 flow [2023-08-04 08:36:24,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 484.6666666666667) internal successors, (1454), 3 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:24,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:36:24,253 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 08:36:24,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 08:36:24,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-04 08:36:24,464 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:36:24,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:36:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2064544348, now seen corresponding path program 1 times [2023-08-04 08:36:24,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:36:24,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809948144] [2023-08-04 08:36:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:24,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:36:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:36:24,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:36:24,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809948144] [2023-08-04 08:36:24,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809948144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:36:24,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:36:24,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:36:24,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411411654] [2023-08-04 08:36:24,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:36:24,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:36:24,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:36:24,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:36:24,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:36:24,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 1316 [2023-08-04 08:36:24,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 81 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 485.3333333333333) internal successors, (1456), 3 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:24,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:36:24,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 1316 [2023-08-04 08:36:24,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:36:52,803 INFO L124 PetriNetUnfolderBase]: 23344/28556 cut-off events. [2023-08-04 08:36:52,804 INFO L125 PetriNetUnfolderBase]: For 2938/2938 co-relation queries the response was YES. [2023-08-04 08:36:52,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60264 conditions, 28556 events. 23344/28556 cut-off events. For 2938/2938 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 103232 event pairs, 9772 based on Foata normal form. 1/15214 useless extension candidates. Maximal degree in co-relation 60185. Up to 27861 conditions per place. [2023-08-04 08:36:52,956 INFO L140 encePairwiseOnDemand]: 1307/1316 looper letters, 73 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2023-08-04 08:36:52,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 442 flow [2023-08-04 08:36:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:36:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:36:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1502 transitions. [2023-08-04 08:36:52,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38044579533941236 [2023-08-04 08:36:52,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1502 transitions. [2023-08-04 08:36:52,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1502 transitions. [2023-08-04 08:36:52,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:36:52,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1502 transitions. [2023-08-04 08:36:52,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 500.6666666666667) internal successors, (1502), 3 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:52,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:52,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1316.0) internal successors, (5264), 4 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:52,966 INFO L175 Difference]: Start difference. First operand has 61 places, 81 transitions, 272 flow. Second operand 3 states and 1502 transitions. [2023-08-04 08:36:52,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 442 flow [2023-08-04 08:36:53,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 434 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:36:53,005 INFO L231 Difference]: Finished difference. Result has 63 places, 85 transitions, 306 flow [2023-08-04 08:36:53,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1316, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=63, PETRI_TRANSITIONS=85} [2023-08-04 08:36:53,005 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2023-08-04 08:36:53,005 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 85 transitions, 306 flow [2023-08-04 08:36:53,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 485.3333333333333) internal successors, (1456), 3 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:53,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:36:53,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:36:53,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 08:36:53,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:36:53,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:36:53,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1804126032, now seen corresponding path program 1 times [2023-08-04 08:36:53,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:36:53,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854615261] [2023-08-04 08:36:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:53,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:36:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:36:53,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:36:53,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854615261] [2023-08-04 08:36:53,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854615261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:36:53,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081075609] [2023-08-04 08:36:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:53,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:36:53,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:36:53,161 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:36:53,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:36:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:54,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:36:54,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:36:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:36:54,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:36:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:36:54,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081075609] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:36:54,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:36:54,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:36:54,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127205074] [2023-08-04 08:36:54,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:36:54,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:36:54,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:36:54,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:36:54,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:36:54,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 454 out of 1316 [2023-08-04 08:36:54,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 85 transitions, 306 flow. Second operand has 8 states, 8 states have (on average 461.5) internal successors, (3692), 8 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:54,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:36:54,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 454 of 1316 [2023-08-04 08:36:54,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:37:20,211 INFO L124 PetriNetUnfolderBase]: 21248/25968 cut-off events. [2023-08-04 08:37:20,211 INFO L125 PetriNetUnfolderBase]: For 2447/2447 co-relation queries the response was YES. [2023-08-04 08:37:20,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54794 conditions, 25968 events. 21248/25968 cut-off events. For 2447/2447 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 92188 event pairs, 4239 based on Foata normal form. 17/13857 useless extension candidates. Maximal degree in co-relation 54697. Up to 25149 conditions per place. [2023-08-04 08:37:20,323 INFO L140 encePairwiseOnDemand]: 1296/1316 looper letters, 84 selfloop transitions, 35 changer transitions 1/124 dead transitions. [2023-08-04 08:37:20,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 124 transitions, 656 flow [2023-08-04 08:37:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:37:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:37:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 3766 transitions. [2023-08-04 08:37:20,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35771276595744683 [2023-08-04 08:37:20,330 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 3766 transitions. [2023-08-04 08:37:20,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 3766 transitions. [2023-08-04 08:37:20,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:37:20,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 3766 transitions. [2023-08-04 08:37:20,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 470.75) internal successors, (3766), 8 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:20,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1316.0) internal successors, (11844), 9 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:20,341 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1316.0) internal successors, (11844), 9 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:20,341 INFO L175 Difference]: Start difference. First operand has 63 places, 85 transitions, 306 flow. Second operand 8 states and 3766 transitions. [2023-08-04 08:37:20,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 124 transitions, 656 flow [2023-08-04 08:37:20,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 124 transitions, 648 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:37:20,369 INFO L231 Difference]: Finished difference. Result has 72 places, 101 transitions, 488 flow [2023-08-04 08:37:20,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1316, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=488, PETRI_PLACES=72, PETRI_TRANSITIONS=101} [2023-08-04 08:37:20,370 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 19 predicate places. [2023-08-04 08:37:20,370 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 101 transitions, 488 flow [2023-08-04 08:37:20,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 461.5) internal successors, (3692), 8 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:20,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:37:20,371 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:37:20,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:37:20,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:37:20,571 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:37:20,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:37:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash -471915064, now seen corresponding path program 1 times [2023-08-04 08:37:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:37:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756806436] [2023-08-04 08:37:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:37:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-08-04 08:37:20,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:37:20,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756806436] [2023-08-04 08:37:20,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756806436] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:37:20,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500297540] [2023-08-04 08:37:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:20,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:37:20,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:37:20,781 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:37:20,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:37:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:21,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:37:21,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:37:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-08-04 08:37:22,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:37:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-08-04 08:37:22,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500297540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:37:22,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:37:22,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-04 08:37:22,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747230829] [2023-08-04 08:37:22,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:37:22,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 08:37:22,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:37:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 08:37:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-08-04 08:37:22,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 454 out of 1316 [2023-08-04 08:37:22,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 101 transitions, 488 flow. Second operand has 14 states, 14 states have (on average 459.2142857142857) internal successors, (6429), 14 states have internal predecessors, (6429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:22,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:37:22,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 454 of 1316 [2023-08-04 08:37:22,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:37:47,219 INFO L124 PetriNetUnfolderBase]: 20304/24796 cut-off events. [2023-08-04 08:37:47,219 INFO L125 PetriNetUnfolderBase]: For 1493/1493 co-relation queries the response was YES. [2023-08-04 08:37:47,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52411 conditions, 24796 events. 20304/24796 cut-off events. For 1493/1493 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 85406 event pairs, 3682 based on Foata normal form. 75/13255 useless extension candidates. Maximal degree in co-relation 52223. Up to 18977 conditions per place. [2023-08-04 08:37:47,333 INFO L140 encePairwiseOnDemand]: 1295/1316 looper letters, 112 selfloop transitions, 47 changer transitions 1/164 dead transitions. [2023-08-04 08:37:47,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 164 transitions, 982 flow [2023-08-04 08:37:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-04 08:37:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-04 08:37:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 6072 transitions. [2023-08-04 08:37:47,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35492167407061026 [2023-08-04 08:37:47,340 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 6072 transitions. [2023-08-04 08:37:47,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 6072 transitions. [2023-08-04 08:37:47,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:37:47,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 6072 transitions. [2023-08-04 08:37:47,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 467.0769230769231) internal successors, (6072), 13 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:47,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 1316.0) internal successors, (18424), 14 states have internal predecessors, (18424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:47,360 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 1316.0) internal successors, (18424), 14 states have internal predecessors, (18424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:47,360 INFO L175 Difference]: Start difference. First operand has 72 places, 101 transitions, 488 flow. Second operand 13 states and 6072 transitions. [2023-08-04 08:37:47,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 164 transitions, 982 flow [2023-08-04 08:37:47,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 164 transitions, 903 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-08-04 08:37:47,409 INFO L231 Difference]: Finished difference. Result has 82 places, 113 transitions, 625 flow [2023-08-04 08:37:47,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1316, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=625, PETRI_PLACES=82, PETRI_TRANSITIONS=113} [2023-08-04 08:37:47,409 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 29 predicate places. [2023-08-04 08:37:47,409 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 113 transitions, 625 flow [2023-08-04 08:37:47,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 459.2142857142857) internal successors, (6429), 14 states have internal predecessors, (6429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:47,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:37:47,410 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:37:47,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:37:47,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:37:47,611 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:37:47,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:37:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash -328171510, now seen corresponding path program 1 times [2023-08-04 08:37:47,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:37:47,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749423640] [2023-08-04 08:37:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:47,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:37:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-08-04 08:37:47,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:37:47,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749423640] [2023-08-04 08:37:47,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749423640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:37:47,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158676909] [2023-08-04 08:37:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:47,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:37:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:37:47,840 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:37:47,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:37:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:49,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 08:37:49,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:37:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-08-04 08:37:49,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:37:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-08-04 08:37:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158676909] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:37:49,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:37:49,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 16 [2023-08-04 08:37:49,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175466356] [2023-08-04 08:37:49,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:37:49,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-04 08:37:49,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:37:49,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-04 08:37:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2023-08-04 08:37:49,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 454 out of 1316 [2023-08-04 08:37:49,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 113 transitions, 625 flow. Second operand has 16 states, 16 states have (on average 458.3125) internal successors, (7333), 16 states have internal predecessors, (7333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:49,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:37:49,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 454 of 1316 [2023-08-04 08:37:49,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:38:07,708 INFO L124 PetriNetUnfolderBase]: 14308/17534 cut-off events. [2023-08-04 08:38:07,708 INFO L125 PetriNetUnfolderBase]: For 4147/4147 co-relation queries the response was YES. [2023-08-04 08:38:07,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37884 conditions, 17534 events. 14308/17534 cut-off events. For 4147/4147 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 57447 event pairs, 2353 based on Foata normal form. 270/9533 useless extension candidates. Maximal degree in co-relation 37668. Up to 7032 conditions per place. [2023-08-04 08:38:07,798 INFO L140 encePairwiseOnDemand]: 1295/1316 looper letters, 123 selfloop transitions, 62 changer transitions 0/189 dead transitions. [2023-08-04 08:38:07,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 189 transitions, 1212 flow [2023-08-04 08:38:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-04 08:38:07,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-04 08:38:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 7461 transitions. [2023-08-04 08:38:07,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3543408054711246 [2023-08-04 08:38:07,804 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 7461 transitions. [2023-08-04 08:38:07,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 7461 transitions. [2023-08-04 08:38:07,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:38:07,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 7461 transitions. [2023-08-04 08:38:07,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 466.3125) internal successors, (7461), 16 states have internal predecessors, (7461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:07,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 1316.0) internal successors, (22372), 17 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:07,829 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 1316.0) internal successors, (22372), 17 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:07,829 INFO L175 Difference]: Start difference. First operand has 82 places, 113 transitions, 625 flow. Second operand 16 states and 7461 transitions. [2023-08-04 08:38:07,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 189 transitions, 1212 flow [2023-08-04 08:38:07,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 189 transitions, 1066 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-08-04 08:38:07,852 INFO L231 Difference]: Finished difference. Result has 97 places, 128 transitions, 814 flow [2023-08-04 08:38:07,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1316, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=814, PETRI_PLACES=97, PETRI_TRANSITIONS=128} [2023-08-04 08:38:07,853 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 44 predicate places. [2023-08-04 08:38:07,853 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 128 transitions, 814 flow [2023-08-04 08:38:07,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 458.3125) internal successors, (7333), 16 states have internal predecessors, (7333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:07,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:38:07,854 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:38:07,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 08:38:08,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-04 08:38:08,067 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:38:08,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:38:08,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1777096612, now seen corresponding path program 1 times [2023-08-04 08:38:08,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:38:08,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100630610] [2023-08-04 08:38:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:38:08,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:38:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:38:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-08-04 08:38:08,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:38:08,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100630610] [2023-08-04 08:38:08,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100630610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:38:08,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487014760] [2023-08-04 08:38:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:38:08,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:38:08,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:38:08,349 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:38:08,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 08:38:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:38:09,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 08:38:09,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:38:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-08-04 08:38:09,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:38:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-08-04 08:38:09,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487014760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:38:09,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:38:09,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 15, 15] total 30 [2023-08-04 08:38:09,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184568096] [2023-08-04 08:38:09,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:38:09,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-04 08:38:09,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:38:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-04 08:38:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2023-08-04 08:38:11,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 454 out of 1316 [2023-08-04 08:38:11,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 128 transitions, 814 flow. Second operand has 30 states, 30 states have (on average 457.03333333333336) internal successors, (13711), 30 states have internal predecessors, (13711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:11,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:38:11,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 454 of 1316 [2023-08-04 08:38:11,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:38:30,582 INFO L124 PetriNetUnfolderBase]: 14280/17493 cut-off events. [2023-08-04 08:38:30,582 INFO L125 PetriNetUnfolderBase]: For 5952/5952 co-relation queries the response was YES. [2023-08-04 08:38:30,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39278 conditions, 17493 events. 14280/17493 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 57300 event pairs, 5681 based on Foata normal form. 19/9257 useless extension candidates. Maximal degree in co-relation 38880. Up to 15841 conditions per place. [2023-08-04 08:38:30,638 INFO L140 encePairwiseOnDemand]: 1295/1316 looper letters, 123 selfloop transitions, 63 changer transitions 2/192 dead transitions. [2023-08-04 08:38:30,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 192 transitions, 1338 flow [2023-08-04 08:38:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-04 08:38:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-04 08:38:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 10175 transitions. [2023-08-04 08:38:30,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3514437689969605 [2023-08-04 08:38:30,645 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 10175 transitions. [2023-08-04 08:38:30,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 10175 transitions. [2023-08-04 08:38:30,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:38:30,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 10175 transitions. [2023-08-04 08:38:30,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 462.5) internal successors, (10175), 22 states have internal predecessors, (10175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:30,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 1316.0) internal successors, (30268), 23 states have internal predecessors, (30268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:30,675 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 1316.0) internal successors, (30268), 23 states have internal predecessors, (30268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:30,676 INFO L175 Difference]: Start difference. First operand has 97 places, 128 transitions, 814 flow. Second operand 22 states and 10175 transitions. [2023-08-04 08:38:30,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 192 transitions, 1338 flow [2023-08-04 08:38:30,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 192 transitions, 1294 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-08-04 08:38:30,715 INFO L231 Difference]: Finished difference. Result has 119 places, 129 transitions, 940 flow [2023-08-04 08:38:30,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1316, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=940, PETRI_PLACES=119, PETRI_TRANSITIONS=129} [2023-08-04 08:38:30,715 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 66 predicate places. [2023-08-04 08:38:30,715 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 940 flow [2023-08-04 08:38:30,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 457.03333333333336) internal successors, (13711), 30 states have internal predecessors, (13711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:30,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:38:30,717 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:38:30,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 08:38:30,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:38:30,930 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:38:30,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:38:30,931 INFO L85 PathProgramCache]: Analyzing trace with hash 681952938, now seen corresponding path program 1 times [2023-08-04 08:38:30,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:38:30,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860998174] [2023-08-04 08:38:30,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:38:30,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:38:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:38:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2023-08-04 08:38:57,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:38:57,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860998174] [2023-08-04 08:38:57,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860998174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:38:57,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349137960] [2023-08-04 08:38:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:38:57,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:38:57,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:38:57,025 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:38:57,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 08:38:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:38:58,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-04 08:38:58,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:39:04,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:04,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:04,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:04,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:04,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:04,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:04,456 INFO L322 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2023-08-04 08:39:04,457 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 472 treesize of output 413 [2023-08-04 08:39:05,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:05,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:05,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:05,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:05,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:05,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 08:39:05,395 INFO L322 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2023-08-04 08:39:05,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 472 treesize of output 413 [2023-08-04 08:39:09,810 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 08:39:09,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1605 treesize of output 1311 Received shutdown request... [2023-08-04 08:41:50,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:41:50,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 08:41:50,380 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 08:41:50,380 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 08:41:50,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:50,567 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 102 with TraceHistMax 13,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations on subformula. [2023-08-04 08:41:50,567 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:50,568 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2023-08-04 08:41:50,569 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:41:50,569 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:41:50,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:41:50 BasicIcfg [2023-08-04 08:41:50,572 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:41:50,573 INFO L158 Benchmark]: Toolchain (without parser) took 751605.53ms. Allocated memory was 507.5MB in the beginning and 7.2GB in the end (delta: 6.6GB). Free memory was 457.0MB in the beginning and 6.2GB in the end (delta: -5.7GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. [2023-08-04 08:41:50,573 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 356.5MB. Free memory was 307.6MB in the beginning and 307.5MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:41:50,573 INFO L158 Benchmark]: CACSL2BoogieTranslator took 442.68ms. Allocated memory is still 507.5MB. Free memory was 456.8MB in the beginning and 436.1MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 08:41:50,573 INFO L158 Benchmark]: Boogie Procedure Inliner took 101.08ms. Allocated memory is still 507.5MB. Free memory was 436.1MB in the beginning and 428.1MB in the end (delta: 8.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.0GB. [2023-08-04 08:41:50,574 INFO L158 Benchmark]: Boogie Preprocessor took 196.73ms. Allocated memory is still 507.5MB. Free memory was 428.1MB in the beginning and 468.4MB in the end (delta: -40.3MB). Peak memory consumption was 12.9MB. Max. memory is 16.0GB. [2023-08-04 08:41:50,574 INFO L158 Benchmark]: RCFGBuilder took 3127.77ms. Allocated memory is still 507.5MB. Free memory was 467.5MB in the beginning and 267.0MB in the end (delta: 200.5MB). Peak memory consumption was 311.7MB. Max. memory is 16.0GB. [2023-08-04 08:41:50,574 INFO L158 Benchmark]: TraceAbstraction took 747731.70ms. Allocated memory was 507.5MB in the beginning and 7.2GB in the end (delta: 6.6GB). Free memory was 267.0MB in the beginning and 6.2GB in the end (delta: -5.9GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. [2023-08-04 08:41:50,575 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 356.5MB. Free memory was 307.6MB in the beginning and 307.5MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 442.68ms. Allocated memory is still 507.5MB. Free memory was 456.8MB in the beginning and 436.1MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 101.08ms. Allocated memory is still 507.5MB. Free memory was 436.1MB in the beginning and 428.1MB in the end (delta: 8.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.0GB. * Boogie Preprocessor took 196.73ms. Allocated memory is still 507.5MB. Free memory was 428.1MB in the beginning and 468.4MB in the end (delta: -40.3MB). Peak memory consumption was 12.9MB. Max. memory is 16.0GB. * RCFGBuilder took 3127.77ms. Allocated memory is still 507.5MB. Free memory was 467.5MB in the beginning and 267.0MB in the end (delta: 200.5MB). Peak memory consumption was 311.7MB. Max. memory is 16.0GB. * TraceAbstraction took 747731.70ms. Allocated memory was 507.5MB in the beginning and 7.2GB in the end (delta: 6.6GB). Free memory was 267.0MB in the beginning and 6.2GB in the end (delta: -5.9GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 54.3s, 429 PlacesBefore, 39 PlacesAfterwards, 485 TransitionsBefore, 54 TransitionsAfterwards, 18150 CoEnabledTransitionPairs, 7 FixpointIterations, 263 TrivialSequentialCompositions, 150 ConcurrentSequentialCompositions, 77 TrivialYvCompositions, 36 ConcurrentYvCompositions, 41 ChoiceCompositions, 567 TotalNumberOfCompositions, 20000 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18275, independent: 18218, independent conditional: 0, independent unconditional: 18218, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 9671, independent: 9640, independent conditional: 0, independent unconditional: 9640, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 18275, independent: 8578, independent conditional: 0, independent unconditional: 8578, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 9671, unknown conditional: 0, unknown unconditional: 9671] , Statistics on independence cache: Total cache size (in pairs): 86, Positive cache size: 84, Positive conditional cache size: 0, Positive unconditional cache size: 84, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 53.7s, 429 PlacesBefore, 39 PlacesAfterwards, 485 TransitionsBefore, 54 TransitionsAfterwards, 18150 CoEnabledTransitionPairs, 7 FixpointIterations, 263 TrivialSequentialCompositions, 147 ConcurrentSequentialCompositions, 79 TrivialYvCompositions, 35 ConcurrentYvCompositions, 41 ChoiceCompositions, 565 TotalNumberOfCompositions, 19453 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18082, independent: 18027, independent conditional: 0, independent unconditional: 18027, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 9732, independent: 9700, independent conditional: 0, independent unconditional: 9700, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 18082, independent: 8327, independent conditional: 0, independent unconditional: 8327, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 9732, unknown conditional: 0, unknown unconditional: 9732] , Statistics on independence cache: Total cache size (in pairs): 90, Positive cache size: 86, Positive conditional cache size: 0, Positive unconditional cache size: 86, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 88.3s, 525 PlacesBefore, 53 PlacesAfterwards, 601 TransitionsBefore, 76 TransitionsAfterwards, 62700 CoEnabledTransitionPairs, 7 FixpointIterations, 264 TrivialSequentialCompositions, 253 ConcurrentSequentialCompositions, 78 TrivialYvCompositions, 67 ConcurrentYvCompositions, 53 ChoiceCompositions, 715 TotalNumberOfCompositions, 77898 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 66149, independent: 66045, independent conditional: 0, independent unconditional: 66045, dependent: 104, dependent conditional: 0, dependent unconditional: 104, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 31563, independent: 31498, independent conditional: 0, independent unconditional: 31498, dependent: 65, dependent conditional: 0, dependent unconditional: 65, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 66149, independent: 34547, independent conditional: 0, independent unconditional: 34547, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 31563, unknown conditional: 0, unknown unconditional: 31563] , Statistics on independence cache: Total cache size (in pairs): 314, Positive cache size: 312, Positive conditional cache size: 0, Positive unconditional cache size: 312, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 235]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 102 with TraceHistMax 13,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations on subformula. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 517 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 66.0s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 54.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 944 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 500 mSDsluCounter, 180 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 68 mSDsCounter, 125 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1612 IncrementalHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 125 mSolverCounterUnsat, 112 mSDtfsCounter, 1612 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=210occurred in iteration=6, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 312 NumberOfCodeBlocks, 312 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 336 ConstructedInterpolants, 0 QuantifiedInterpolants, 420 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2048 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 85/92 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 609 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 610.3s, OverallIterations: 12, TraceHistogramMax: 13, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 309.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 88.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4052 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3181 mSDsluCounter, 646 SdHoareTripleChecker+Invalid, 4.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 419 mSDsCounter, 455 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9900 IncrementalHoareTripleChecker+Invalid, 10355 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 455 mSolverCounterUnsat, 227 mSDtfsCounter, 9900 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 665 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=940occurred in iteration=11, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 803 NumberOfCodeBlocks, 803 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 1047 ConstructedInterpolants, 0 QuantifiedInterpolants, 1411 SizeOfPredicates, 5 NumberOfNonLiveVariables, 4194 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 23 InterpolantComputations, 7 PerfectInterpolantSequences, 1123/1339 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 517 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 70.9s, OverallIterations: 7, TraceHistogramMax: 13, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 53.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3400 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2608 mSDsluCounter, 208 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 330 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6086 IncrementalHoareTripleChecker+Invalid, 6416 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 330 mSolverCounterUnsat, 208 mSDtfsCounter, 6086 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 303 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=736occurred in iteration=6, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 5.5s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 394 NumberOfCodeBlocks, 394 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 443 ConstructedInterpolants, 0 QuantifiedInterpolants, 755 SizeOfPredicates, 6 NumberOfNonLiveVariables, 2196 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 647/846 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown