/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:25:33,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:25:33,157 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:25:33,161 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:25:33,162 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:25:33,162 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:25:33,162 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:25:33,179 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:25:33,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:25:33,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:25:33,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:25:33,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:25:33,182 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:25:33,182 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:25:33,182 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:25:33,183 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:25:33,183 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:25:33,183 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:25:33,183 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:25:33,184 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:25:33,184 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:25:33,185 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:25:33,185 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:25:33,185 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:25:33,185 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:25:33,185 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:25:33,186 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:25:33,186 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:25:33,186 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:25:33,186 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:25:33,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:25:33,187 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:25:33,187 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:25:33,187 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:25:33,187 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:25:33,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:25:33,188 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:25:33,188 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:25:33,188 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:25:33,188 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:25:33,188 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:25:33,190 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:25:33,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:25:33,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:25:33,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:25:33,384 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:25:33,384 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:25:33,385 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c [2023-08-04 02:25:34,514 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:25:34,715 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:25:34,716 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c [2023-08-04 02:25:34,724 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7ad0079/b160399867c94bd08623862120c6dd4d/FLAG786108051 [2023-08-04 02:25:34,742 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f7ad0079/b160399867c94bd08623862120c6dd4d [2023-08-04 02:25:34,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:25:34,748 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:25:34,749 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:25:34,750 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:25:34,752 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:25:34,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:34,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2240bda8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34, skipping insertion in model container [2023-08-04 02:25:34,753 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:34,781 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:25:34,941 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c[3300,3313] [2023-08-04 02:25:34,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:25:34,952 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:25:34,972 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-min-max-1.wvr_bound2.c[3300,3313] [2023-08-04 02:25:34,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:25:34,982 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:25:34,982 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:25:34,987 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:25:34,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34 WrapperNode [2023-08-04 02:25:34,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:25:34,988 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:25:34,988 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:25:34,988 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:25:34,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:35,000 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:35,018 INFO L138 Inliner]: procedures = 25, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 177 [2023-08-04 02:25:35,019 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:25:35,019 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:25:35,019 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:25:35,019 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:25:35,026 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:35,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:35,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:35,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:35,036 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:35,039 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:35,041 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:35,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:35,045 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:25:35,046 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:25:35,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:25:35,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:25:35,047 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (1/1) ... [2023-08-04 02:25:35,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:25:35,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:25:35,086 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 02:25:35,097 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 02:25:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:25:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:25:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:25:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:25:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:25:35,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:25:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:25:35,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:25:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:25:35,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:25:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:25:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:25:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:25:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:25:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:25:35,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:25:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:25:35,126 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 02:25:35,220 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:25:35,221 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:25:35,478 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:25:35,558 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:25:35,558 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 02:25:35,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:25:35 BoogieIcfgContainer [2023-08-04 02:25:35,560 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:25:35,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:25:35,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:25:35,564 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:25:35,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:25:34" (1/3) ... [2023-08-04 02:25:35,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf2eb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:25:35, skipping insertion in model container [2023-08-04 02:25:35,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:34" (2/3) ... [2023-08-04 02:25:35,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf2eb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:25:35, skipping insertion in model container [2023-08-04 02:25:35,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:25:35" (3/3) ... [2023-08-04 02:25:35,566 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-min-max-1.wvr_bound2.c [2023-08-04 02:25:35,575 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:25:35,581 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:25:35,582 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:25:35,582 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:25:35,675 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:25:35,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 217 transitions, 476 flow [2023-08-04 02:25:35,884 INFO L124 PetriNetUnfolderBase]: 95/666 cut-off events. [2023-08-04 02:25:35,885 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:25:35,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 666 events. 95/666 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3103 event pairs, 0 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-04 02:25:35,895 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 217 transitions, 476 flow [2023-08-04 02:25:35,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 217 transitions, 476 flow [2023-08-04 02:25:35,912 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:25:35,923 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 217 transitions, 476 flow [2023-08-04 02:25:35,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 217 transitions, 476 flow [2023-08-04 02:25:35,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 217 transitions, 476 flow [2023-08-04 02:25:36,016 INFO L124 PetriNetUnfolderBase]: 95/666 cut-off events. [2023-08-04 02:25:36,017 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:25:36,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 666 events. 95/666 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3103 event pairs, 0 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 383. Up to 16 conditions per place. [2023-08-04 02:25:36,029 INFO L119 LiptonReduction]: Number of co-enabled transitions 4842 [2023-08-04 02:25:41,546 INFO L134 LiptonReduction]: Checked pairs total: 9825 [2023-08-04 02:25:41,547 INFO L136 LiptonReduction]: Total number of compositions: 204 [2023-08-04 02:25:41,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:25:41,564 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;@1d04557b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:25:41,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:25:41,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:25:41,585 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-08-04 02:25:41,585 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:25:41,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:25:41,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 02:25:41,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:25:41,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:25:41,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1519021916, now seen corresponding path program 1 times [2023-08-04 02:25:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:25:41,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649337733] [2023-08-04 02:25:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:25:41,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:25:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:25:42,027 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 02:25:42,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:25:42,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649337733] [2023-08-04 02:25:42,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649337733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:25:42,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:25:42,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:25:42,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328423278] [2023-08-04 02:25:42,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:25:42,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:25:42,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:25:42,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:25:42,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:25:42,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 421 [2023-08-04 02:25:42,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:42,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:25:42,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 421 [2023-08-04 02:25:42,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:25:42,306 INFO L124 PetriNetUnfolderBase]: 1856/2970 cut-off events. [2023-08-04 02:25:42,306 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-08-04 02:25:42,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6043 conditions, 2970 events. 1856/2970 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14549 event pairs, 1326 based on Foata normal form. 0/2275 useless extension candidates. Maximal degree in co-relation 4890. Up to 2796 conditions per place. [2023-08-04 02:25:42,313 INFO L140 encePairwiseOnDemand]: 417/421 looper letters, 22 selfloop transitions, 2 changer transitions 22/49 dead transitions. [2023-08-04 02:25:42,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 226 flow [2023-08-04 02:25:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:25:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:25:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-08-04 02:25:42,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679334916864608 [2023-08-04 02:25:42,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-08-04 02:25:42,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-08-04 02:25:42,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:25:42,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-08-04 02:25:42,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:42,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:42,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:42,345 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 140 flow. Second operand 3 states and 591 transitions. [2023-08-04 02:25:42,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 226 flow [2023-08-04 02:25:42,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:25:42,351 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 79 flow [2023-08-04 02:25:42,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-04 02:25:42,357 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 02:25:42,357 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 79 flow [2023-08-04 02:25:42,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:42,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:25:42,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:25:42,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:25:42,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:25:42,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:25:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1798611547, now seen corresponding path program 1 times [2023-08-04 02:25:42,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:25:42,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000459483] [2023-08-04 02:25:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:25:42,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:25:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:25:42,397 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:25:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:25:42,476 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:25:42,476 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:25:42,478 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:25:42,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:25:42,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:25:42,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 02:25:42,480 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 02:25:42,483 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:25:42,484 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:25:42,484 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:25:42,519 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:25:42,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 256 transitions, 602 flow [2023-08-04 02:25:42,995 INFO L124 PetriNetUnfolderBase]: 857/4067 cut-off events. [2023-08-04 02:25:42,996 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:25:43,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4741 conditions, 4067 events. 857/4067 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32241 event pairs, 11 based on Foata normal form. 0/3454 useless extension candidates. Maximal degree in co-relation 2417. Up to 192 conditions per place. [2023-08-04 02:25:43,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 256 transitions, 602 flow [2023-08-04 02:25:43,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 256 transitions, 602 flow [2023-08-04 02:25:43,035 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:25:43,035 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 256 transitions, 602 flow [2023-08-04 02:25:43,035 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 256 transitions, 602 flow [2023-08-04 02:25:43,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 256 transitions, 602 flow [2023-08-04 02:25:43,385 INFO L124 PetriNetUnfolderBase]: 857/4067 cut-off events. [2023-08-04 02:25:43,385 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:25:43,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4741 conditions, 4067 events. 857/4067 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32241 event pairs, 11 based on Foata normal form. 0/3454 useless extension candidates. Maximal degree in co-relation 2417. Up to 192 conditions per place. [2023-08-04 02:25:43,439 INFO L119 LiptonReduction]: Number of co-enabled transitions 12312 [2023-08-04 02:25:48,940 INFO L134 LiptonReduction]: Checked pairs total: 33837 [2023-08-04 02:25:48,940 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-04 02:25:48,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:25:48,943 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;@1d04557b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:25:48,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:25:48,948 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:25:48,951 INFO L124 PetriNetUnfolderBase]: 12/115 cut-off events. [2023-08-04 02:25:48,951 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:25:48,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:25:48,954 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:25:48,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:25:48,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:25:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1361115582, now seen corresponding path program 1 times [2023-08-04 02:25:48,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:25:48,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624584158] [2023-08-04 02:25:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:25:48,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:25:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:25:49,058 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 02:25:49,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:25:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624584158] [2023-08-04 02:25:49,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624584158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:25:49,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:25:49,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:25:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182913957] [2023-08-04 02:25:49,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:25:49,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:25:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:25:49,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:25:49,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:25:49,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 470 [2023-08-04 02:25:49,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:49,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:25:49,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 470 [2023-08-04 02:25:49,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:10,257 INFO L124 PetriNetUnfolderBase]: 264163/342150 cut-off events. [2023-08-04 02:26:10,257 INFO L125 PetriNetUnfolderBase]: For 44610/44610 co-relation queries the response was YES. [2023-08-04 02:26:11,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699027 conditions, 342150 events. 264163/342150 cut-off events. For 44610/44610 co-relation queries the response was YES. Maximal size of possible extension queue 5108. Compared 2027636 event pairs, 191822 based on Foata normal form. 0/271017 useless extension candidates. Maximal degree in co-relation 210634. Up to 327527 conditions per place. [2023-08-04 02:26:11,552 INFO L140 encePairwiseOnDemand]: 466/470 looper letters, 34 selfloop transitions, 2 changer transitions 31/73 dead transitions. [2023-08-04 02:26:11,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 364 flow [2023-08-04 02:26:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:26:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:26:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-08-04 02:26:11,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474468085106383 [2023-08-04 02:26:11,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-08-04 02:26:11,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-08-04 02:26:11,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:26:11,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-08-04 02:26:11,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:11,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:11,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:11,562 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 236 flow. Second operand 3 states and 669 transitions. [2023-08-04 02:26:11,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 364 flow [2023-08-04 02:26:11,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 73 transitions, 364 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:26:11,680 INFO L231 Difference]: Finished difference. Result has 65 places, 42 transitions, 130 flow [2023-08-04 02:26:11,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=65, PETRI_TRANSITIONS=42} [2023-08-04 02:26:11,681 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 02:26:11,681 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 42 transitions, 130 flow [2023-08-04 02:26:11,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:11,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:11,682 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:11,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:26:11,682 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:26:11,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:11,684 INFO L85 PathProgramCache]: Analyzing trace with hash -347078938, now seen corresponding path program 1 times [2023-08-04 02:26:11,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:11,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538053581] [2023-08-04 02:26:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:11,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:26:11,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:11,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538053581] [2023-08-04 02:26:11,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538053581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:26:11,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79699232] [2023-08-04 02:26:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:11,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:11,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:26:11,774 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 02:26:11,778 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 02:26:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:11,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:26:11,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:26:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:26:11,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:26:11,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79699232] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:26:11,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:26:11,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:26:11,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107783462] [2023-08-04 02:26:11,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:26:11,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:26:11,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:11,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:26:11,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:26:11,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-04 02:26:11,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 42 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 204.0) internal successors, (1020), 5 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:11,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:11,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-04 02:26:11,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:14,872 INFO L124 PetriNetUnfolderBase]: 39779/51382 cut-off events. [2023-08-04 02:26:14,873 INFO L125 PetriNetUnfolderBase]: For 3511/3511 co-relation queries the response was YES. [2023-08-04 02:26:15,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106442 conditions, 51382 events. 39779/51382 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 256683 event pairs, 18018 based on Foata normal form. 0/42063 useless extension candidates. Maximal degree in co-relation 106425. Up to 49887 conditions per place. [2023-08-04 02:26:15,368 INFO L140 encePairwiseOnDemand]: 466/470 looper letters, 47 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2023-08-04 02:26:15,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 260 flow [2023-08-04 02:26:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:26:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:26:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1062 transitions. [2023-08-04 02:26:15,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45191489361702125 [2023-08-04 02:26:15,371 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1062 transitions. [2023-08-04 02:26:15,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1062 transitions. [2023-08-04 02:26:15,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:26:15,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1062 transitions. [2023-08-04 02:26:15,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.4) internal successors, (1062), 5 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:15,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:15,378 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:15,378 INFO L175 Difference]: Start difference. First operand has 65 places, 42 transitions, 130 flow. Second operand 5 states and 1062 transitions. [2023-08-04 02:26:15,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 260 flow [2023-08-04 02:26:15,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 57 transitions, 251 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-04 02:26:15,384 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 138 flow [2023-08-04 02:26:15,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-04 02:26:15,386 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-08-04 02:26:15,386 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 138 flow [2023-08-04 02:26:15,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 204.0) internal successors, (1020), 5 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:15,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:15,387 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:15,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 02:26:15,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:15,592 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:26:15,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:15,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1922464693, now seen corresponding path program 1 times [2023-08-04 02:26:15,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:15,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434830293] [2023-08-04 02:26:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:15,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 02:26:15,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:15,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434830293] [2023-08-04 02:26:15,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434830293] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:26:15,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:26:15,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:26:15,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160140181] [2023-08-04 02:26:15,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:26:15,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:26:15,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:15,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:26:15,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:26:15,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 470 [2023-08-04 02:26:15,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:15,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:15,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 470 [2023-08-04 02:26:15,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:18,396 INFO L124 PetriNetUnfolderBase]: 38714/49751 cut-off events. [2023-08-04 02:26:18,396 INFO L125 PetriNetUnfolderBase]: For 2849/2849 co-relation queries the response was YES. [2023-08-04 02:26:18,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102466 conditions, 49751 events. 38714/49751 cut-off events. For 2849/2849 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 238644 event pairs, 22956 based on Foata normal form. 1/40679 useless extension candidates. Maximal degree in co-relation 102444. Up to 48396 conditions per place. [2023-08-04 02:26:18,648 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 41 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 02:26:18,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 48 transitions, 231 flow [2023-08-04 02:26:18,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:26:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:26:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 651 transitions. [2023-08-04 02:26:18,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46170212765957447 [2023-08-04 02:26:18,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 651 transitions. [2023-08-04 02:26:18,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 651 transitions. [2023-08-04 02:26:18,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:26:18,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 651 transitions. [2023-08-04 02:26:18,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:18,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:18,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:18,656 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 138 flow. Second operand 3 states and 651 transitions. [2023-08-04 02:26:18,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 48 transitions, 231 flow [2023-08-04 02:26:18,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 48 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:26:18,658 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 136 flow [2023-08-04 02:26:18,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-04 02:26:18,659 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2023-08-04 02:26:18,659 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 136 flow [2023-08-04 02:26:18,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:18,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:18,659 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:18,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 02:26:18,660 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:26:18,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:18,660 INFO L85 PathProgramCache]: Analyzing trace with hash -106357429, now seen corresponding path program 1 times [2023-08-04 02:26:18,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:18,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175498281] [2023-08-04 02:26:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:18,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:18,697 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 02:26:18,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:18,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175498281] [2023-08-04 02:26:18,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175498281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:26:18,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080130185] [2023-08-04 02:26:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:18,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:18,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:26:18,715 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 02:26:18,729 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 02:26:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:18,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:26:18,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:26:18,824 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 02:26:18,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:26:18,838 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 02:26:18,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080130185] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:26:18,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:26:18,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:26:18,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013083427] [2023-08-04 02:26:18,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:26:18,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:26:18,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:18,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:26:18,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:26:18,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-04 02:26:18,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:18,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:18,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-04 02:26:18,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:21,348 INFO L124 PetriNetUnfolderBase]: 32526/41379 cut-off events. [2023-08-04 02:26:21,349 INFO L125 PetriNetUnfolderBase]: For 2253/2253 co-relation queries the response was YES. [2023-08-04 02:26:21,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85131 conditions, 41379 events. 32526/41379 cut-off events. For 2253/2253 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 188374 event pairs, 13728 based on Foata normal form. 4/33732 useless extension candidates. Maximal degree in co-relation 85108. Up to 40228 conditions per place. [2023-08-04 02:26:21,529 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 47 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-08-04 02:26:21,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 55 transitions, 259 flow [2023-08-04 02:26:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:26:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:26:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 858 transitions. [2023-08-04 02:26:21,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563829787234043 [2023-08-04 02:26:21,531 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 858 transitions. [2023-08-04 02:26:21,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 858 transitions. [2023-08-04 02:26:21,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:26:21,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 858 transitions. [2023-08-04 02:26:21,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.5) internal successors, (858), 4 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:21,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:21,536 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:21,536 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 136 flow. Second operand 4 states and 858 transitions. [2023-08-04 02:26:21,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 55 transitions, 259 flow [2023-08-04 02:26:21,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:26:21,537 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 133 flow [2023-08-04 02:26:21,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-08-04 02:26:21,538 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2023-08-04 02:26:21,538 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 133 flow [2023-08-04 02:26:21,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:21,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:21,539 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:21,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:26:21,743 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,SelfDestructingSolverStorable5 [2023-08-04 02:26:21,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:26:21,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:21,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1856163200, now seen corresponding path program 1 times [2023-08-04 02:26:21,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:21,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820545500] [2023-08-04 02:26:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:21,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 02:26:21,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:21,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820545500] [2023-08-04 02:26:21,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820545500] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:26:21,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464051736] [2023-08-04 02:26:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:21,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:21,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:26:21,828 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 02:26:21,837 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 02:26:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:21,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:26:21,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:26:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 02:26:21,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:26:21,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464051736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:26:21,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:26:21,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:26:21,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733138921] [2023-08-04 02:26:21,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:26:21,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:26:21,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:21,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:26:21,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:26:21,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-04 02:26:21,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:21,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:21,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-04 02:26:21,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:24,098 INFO L124 PetriNetUnfolderBase]: 31502/40771 cut-off events. [2023-08-04 02:26:24,099 INFO L125 PetriNetUnfolderBase]: For 1535/1535 co-relation queries the response was YES. [2023-08-04 02:26:24,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83451 conditions, 40771 events. 31502/40771 cut-off events. For 1535/1535 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 197347 event pairs, 4074 based on Foata normal form. 0/33424 useless extension candidates. Maximal degree in co-relation 83428. Up to 36992 conditions per place. [2023-08-04 02:26:24,312 INFO L140 encePairwiseOnDemand]: 466/470 looper letters, 72 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-08-04 02:26:24,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 363 flow [2023-08-04 02:26:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:26:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:26:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1086 transitions. [2023-08-04 02:26:24,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621276595744681 [2023-08-04 02:26:24,319 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1086 transitions. [2023-08-04 02:26:24,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1086 transitions. [2023-08-04 02:26:24,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:26:24,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1086 transitions. [2023-08-04 02:26:24,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 217.2) internal successors, (1086), 5 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:24,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:24,324 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:24,324 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 133 flow. Second operand 5 states and 1086 transitions. [2023-08-04 02:26:24,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 363 flow [2023-08-04 02:26:24,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 356 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:26:24,328 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 145 flow [2023-08-04 02:26:24,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-08-04 02:26:24,329 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -7 predicate places. [2023-08-04 02:26:24,329 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 145 flow [2023-08-04 02:26:24,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:24,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:24,329 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:24,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 02:26:24,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:24,533 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:26:24,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:24,534 INFO L85 PathProgramCache]: Analyzing trace with hash 363712149, now seen corresponding path program 1 times [2023-08-04 02:26:24,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:24,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383120110] [2023-08-04 02:26:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:24,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:26:24,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:24,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383120110] [2023-08-04 02:26:24,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383120110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:26:24,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:26:24,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:26:24,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203735012] [2023-08-04 02:26:24,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:26:24,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:26:24,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:24,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:26:24,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:26:24,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 470 [2023-08-04 02:26:24,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:24,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:24,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 470 [2023-08-04 02:26:24,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:27,130 INFO L124 PetriNetUnfolderBase]: 30670/39475 cut-off events. [2023-08-04 02:26:27,130 INFO L125 PetriNetUnfolderBase]: For 2654/2654 co-relation queries the response was YES. [2023-08-04 02:26:27,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81558 conditions, 39475 events. 30670/39475 cut-off events. For 2654/2654 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 184217 event pairs, 18474 based on Foata normal form. 16/32463 useless extension candidates. Maximal degree in co-relation 81536. Up to 37551 conditions per place. [2023-08-04 02:26:27,342 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 50 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-04 02:26:27,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 272 flow [2023-08-04 02:26:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:26:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:26:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-08-04 02:26:27,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673758865248227 [2023-08-04 02:26:27,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-08-04 02:26:27,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-08-04 02:26:27,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:26:27,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-08-04 02:26:27,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:27,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:27,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:27,347 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 145 flow. Second operand 3 states and 659 transitions. [2023-08-04 02:26:27,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 272 flow [2023-08-04 02:26:27,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 56 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:26:27,348 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 143 flow [2023-08-04 02:26:27,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2023-08-04 02:26:27,349 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2023-08-04 02:26:27,349 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 143 flow [2023-08-04 02:26:27,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:27,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:27,349 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:27,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 02:26:27,350 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:26:27,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:27,350 INFO L85 PathProgramCache]: Analyzing trace with hash 94354964, now seen corresponding path program 1 times [2023-08-04 02:26:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:27,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622907927] [2023-08-04 02:26:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:26:27,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:27,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622907927] [2023-08-04 02:26:27,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622907927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:26:27,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256098510] [2023-08-04 02:26:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:27,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:27,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:26:27,389 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 02:26:27,391 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 02:26:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:27,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:26:27,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:26:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:26:27,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:26:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:26:27,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256098510] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:26:27,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:26:27,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:26:27,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167408204] [2023-08-04 02:26:27,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:26:27,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:26:27,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:27,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:26:27,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:26:27,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-04 02:26:27,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:27,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:27,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-04 02:26:27,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:29,564 INFO L124 PetriNetUnfolderBase]: 26062/33331 cut-off events. [2023-08-04 02:26:29,564 INFO L125 PetriNetUnfolderBase]: For 2142/2142 co-relation queries the response was YES. [2023-08-04 02:26:29,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68902 conditions, 33331 events. 26062/33331 cut-off events. For 2142/2142 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 148285 event pairs, 11178 based on Foata normal form. 64/27327 useless extension candidates. Maximal degree in co-relation 68880. Up to 30063 conditions per place. [2023-08-04 02:26:29,758 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 64 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-08-04 02:26:29,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 332 flow [2023-08-04 02:26:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:26:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:26:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 874 transitions. [2023-08-04 02:26:29,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648936170212766 [2023-08-04 02:26:29,772 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 874 transitions. [2023-08-04 02:26:29,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 874 transitions. [2023-08-04 02:26:29,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:26:29,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 874 transitions. [2023-08-04 02:26:29,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 218.5) internal successors, (874), 4 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:29,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:29,776 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:29,776 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 143 flow. Second operand 4 states and 874 transitions. [2023-08-04 02:26:29,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 332 flow [2023-08-04 02:26:29,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:26:29,778 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 140 flow [2023-08-04 02:26:29,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2023-08-04 02:26:29,779 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2023-08-04 02:26:29,779 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 140 flow [2023-08-04 02:26:29,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:29,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:29,779 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:29,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 02:26:29,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:29,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:26:29,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:29,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1512202318, now seen corresponding path program 1 times [2023-08-04 02:26:29,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:29,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603028449] [2023-08-04 02:26:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:29,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:26:30,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:30,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603028449] [2023-08-04 02:26:30,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603028449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:26:30,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492280463] [2023-08-04 02:26:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:30,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:30,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:26:30,075 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 02:26:30,076 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 02:26:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:30,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:26:30,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:26:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:26:30,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:26:30,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492280463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:26:30,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:26:30,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:26:30,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430574261] [2023-08-04 02:26:30,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:26:30,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:26:30,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:30,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:26:30,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:26:30,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 470 [2023-08-04 02:26:30,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:30,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:30,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 470 [2023-08-04 02:26:30,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:31,863 INFO L124 PetriNetUnfolderBase]: 20942/26675 cut-off events. [2023-08-04 02:26:31,863 INFO L125 PetriNetUnfolderBase]: For 2626/2626 co-relation queries the response was YES. [2023-08-04 02:26:31,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55846 conditions, 26675 events. 20942/26675 cut-off events. For 2626/2626 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 112850 event pairs, 1818 based on Foata normal form. 1024/22655 useless extension candidates. Maximal degree in co-relation 55824. Up to 11264 conditions per place. [2023-08-04 02:26:31,922 INFO L140 encePairwiseOnDemand]: 467/470 looper letters, 0 selfloop transitions, 0 changer transitions 94/94 dead transitions. [2023-08-04 02:26:31,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 424 flow [2023-08-04 02:26:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:26:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:26:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1099 transitions. [2023-08-04 02:26:31,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676595744680851 [2023-08-04 02:26:31,924 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1099 transitions. [2023-08-04 02:26:31,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1099 transitions. [2023-08-04 02:26:31,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:26:31,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1099 transitions. [2023-08-04 02:26:31,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.8) internal successors, (1099), 5 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:31,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:31,928 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:31,928 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 140 flow. Second operand 5 states and 1099 transitions. [2023-08-04 02:26:31,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 424 flow [2023-08-04 02:26:31,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 94 transitions, 417 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:26:31,981 INFO L231 Difference]: Finished difference. Result has 57 places, 0 transitions, 0 flow [2023-08-04 02:26:31,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=57, PETRI_TRANSITIONS=0} [2023-08-04 02:26:31,981 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2023-08-04 02:26:31,981 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 0 transitions, 0 flow [2023-08-04 02:26:31,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:31,982 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:26:31,982 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:26:31,982 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:26:31,987 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 02:26:32,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 02:26:32,187 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:32,188 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 02:26:32,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 256 transitions, 602 flow [2023-08-04 02:26:32,522 INFO L124 PetriNetUnfolderBase]: 857/4067 cut-off events. [2023-08-04 02:26:32,522 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:26:32,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4741 conditions, 4067 events. 857/4067 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32241 event pairs, 11 based on Foata normal form. 0/3454 useless extension candidates. Maximal degree in co-relation 2417. Up to 192 conditions per place. [2023-08-04 02:26:32,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 256 transitions, 602 flow [2023-08-04 02:26:32,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 256 transitions, 602 flow [2023-08-04 02:26:32,563 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:26:32,563 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 256 transitions, 602 flow [2023-08-04 02:26:32,564 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 256 transitions, 602 flow [2023-08-04 02:26:32,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 256 transitions, 602 flow [2023-08-04 02:26:33,042 INFO L124 PetriNetUnfolderBase]: 857/4067 cut-off events. [2023-08-04 02:26:33,042 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:26:33,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4741 conditions, 4067 events. 857/4067 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32241 event pairs, 11 based on Foata normal form. 0/3454 useless extension candidates. Maximal degree in co-relation 2417. Up to 192 conditions per place. [2023-08-04 02:26:33,103 INFO L119 LiptonReduction]: Number of co-enabled transitions 12312 [2023-08-04 02:26:38,325 INFO L134 LiptonReduction]: Checked pairs total: 33837 [2023-08-04 02:26:38,325 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-04 02:26:38,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:26:38,327 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;@1d04557b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:26:38,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:26:38,329 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:26:38,329 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-08-04 02:26:38,329 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 02:26:38,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:38,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:38,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:26:38,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:38,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2065195687, now seen corresponding path program 1 times [2023-08-04 02:26:38,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:38,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312810879] [2023-08-04 02:26:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:38,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:38,377 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 02:26:38,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:38,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312810879] [2023-08-04 02:26:38,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312810879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:26:38,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:26:38,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:26:38,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037286993] [2023-08-04 02:26:38,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:26:38,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:26:38,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:26:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:26:38,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2023-08-04 02:26:38,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:38,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:38,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2023-08-04 02:26:38,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:57,038 INFO L124 PetriNetUnfolderBase]: 262951/339964 cut-off events. [2023-08-04 02:26:57,038 INFO L125 PetriNetUnfolderBase]: For 45210/45210 co-relation queries the response was YES. [2023-08-04 02:26:57,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695416 conditions, 339964 events. 262951/339964 cut-off events. For 45210/45210 co-relation queries the response was YES. Maximal size of possible extension queue 4898. Compared 2003767 event pairs, 152324 based on Foata normal form. 0/268685 useless extension candidates. Maximal degree in co-relation 209973. Up to 325826 conditions per place. [2023-08-04 02:26:58,865 INFO L140 encePairwiseOnDemand]: 467/471 looper letters, 67 selfloop transitions, 2 changer transitions 3/78 dead transitions. [2023-08-04 02:26:58,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 384 flow [2023-08-04 02:26:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:26:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:26:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 680 transitions. [2023-08-04 02:26:58,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48124557678697805 [2023-08-04 02:26:58,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 680 transitions. [2023-08-04 02:26:58,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 680 transitions. [2023-08-04 02:26:58,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:26:58,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 680 transitions. [2023-08-04 02:26:58,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:58,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:58,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:58,870 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 236 flow. Second operand 3 states and 680 transitions. [2023-08-04 02:26:58,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 384 flow [2023-08-04 02:26:58,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:26:58,888 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 228 flow [2023-08-04 02:26:58,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2023-08-04 02:26:58,889 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 02:26:58,889 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 228 flow [2023-08-04 02:26:58,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:58,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:58,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:58,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 02:26:58,889 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:26:58,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:58,889 INFO L85 PathProgramCache]: Analyzing trace with hash 461447834, now seen corresponding path program 1 times [2023-08-04 02:26:58,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:58,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410164555] [2023-08-04 02:26:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:58,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:26:58,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:58,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410164555] [2023-08-04 02:26:58,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410164555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:26:58,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269578698] [2023-08-04 02:26:58,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:58,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:58,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:26:58,916 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 02:26:58,957 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 02:26:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:59,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:26:59,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:26:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:26:59,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:26:59,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269578698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:26:59,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:26:59,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:26:59,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851578709] [2023-08-04 02:26:59,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:26:59,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:26:59,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:59,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:26:59,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:26:59,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2023-08-04 02:26:59,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:59,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:59,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2023-08-04 02:26:59,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:27:20,639 INFO L124 PetriNetUnfolderBase]: 261851/338380 cut-off events. [2023-08-04 02:27:20,653 INFO L125 PetriNetUnfolderBase]: For 38898/38898 co-relation queries the response was YES. [2023-08-04 02:27:21,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691011 conditions, 338380 events. 261851/338380 cut-off events. For 38898/38898 co-relation queries the response was YES. Maximal size of possible extension queue 4956. Compared 1985065 event pairs, 151899 based on Foata normal form. 0/267282 useless extension candidates. Maximal degree in co-relation 690963. Up to 323977 conditions per place. [2023-08-04 02:27:22,695 INFO L140 encePairwiseOnDemand]: 468/471 looper letters, 76 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-04 02:27:22,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 84 transitions, 412 flow [2023-08-04 02:27:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:27:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:27:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2023-08-04 02:27:22,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861995753715499 [2023-08-04 02:27:22,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2023-08-04 02:27:22,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2023-08-04 02:27:22,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:27:22,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2023-08-04 02:27:22,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:22,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:22,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:22,701 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 228 flow. Second operand 3 states and 687 transitions. [2023-08-04 02:27:22,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 84 transitions, 412 flow [2023-08-04 02:27:22,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 398 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:27:22,876 INFO L231 Difference]: Finished difference. Result has 61 places, 71 transitions, 226 flow [2023-08-04 02:27:22,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=61, PETRI_TRANSITIONS=71} [2023-08-04 02:27:22,877 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-08-04 02:27:22,877 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 71 transitions, 226 flow [2023-08-04 02:27:22,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:22,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:27:22,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:27:22,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 02:27:23,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:27:23,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:27:23,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:27:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1025071603, now seen corresponding path program 1 times [2023-08-04 02:27:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:27:23,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864603013] [2023-08-04 02:27:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:27:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:27:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:27:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:27:23,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:27:23,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864603013] [2023-08-04 02:27:23,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864603013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:27:23,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231282367] [2023-08-04 02:27:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:27:23,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:27:23,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:27:23,146 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 02:27:23,148 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 02:27:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:27:23,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:27:23,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:27:23,283 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 02:27:23,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:27:23,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231282367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:27:23,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:27:23,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:27:23,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260574238] [2023-08-04 02:27:23,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:27:23,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:27:23,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:27:23,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:27:23,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:27:23,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2023-08-04 02:27:23,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 71 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:23,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:27:23,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2023-08-04 02:27:23,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:27:41,704 INFO L124 PetriNetUnfolderBase]: 261451/339032 cut-off events. [2023-08-04 02:27:41,704 INFO L125 PetriNetUnfolderBase]: For 18076/18076 co-relation queries the response was YES. [2023-08-04 02:27:42,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691276 conditions, 339032 events. 261451/339032 cut-off events. For 18076/18076 co-relation queries the response was YES. Maximal size of possible extension queue 5400. Compared 2007262 event pairs, 165838 based on Foata normal form. 0/269100 useless extension candidates. Maximal degree in co-relation 210186. Up to 316573 conditions per place. [2023-08-04 02:27:43,879 INFO L140 encePairwiseOnDemand]: 468/471 looper letters, 82 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-04 02:27:43,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 90 transitions, 432 flow [2023-08-04 02:27:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:27:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:27:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-08-04 02:27:43,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897381457891012 [2023-08-04 02:27:43,898 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-08-04 02:27:43,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-08-04 02:27:43,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:27:43,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-08-04 02:27:43,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:43,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:43,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:43,901 INFO L175 Difference]: Start difference. First operand has 61 places, 71 transitions, 226 flow. Second operand 3 states and 692 transitions. [2023-08-04 02:27:43,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 90 transitions, 432 flow [2023-08-04 02:27:43,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:27:43,908 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 236 flow [2023-08-04 02:27:43,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2023-08-04 02:27:43,909 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-08-04 02:27:43,909 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 236 flow [2023-08-04 02:27:43,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:43,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:27:43,909 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 02:27:43,918 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 02:27:44,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:27:44,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:27:44,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:27:44,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1310638886, now seen corresponding path program 1 times [2023-08-04 02:27:44,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:27:44,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833801017] [2023-08-04 02:27:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:27:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:27:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:27:44,158 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 02:27:44,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:27:44,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833801017] [2023-08-04 02:27:44,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833801017] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:27:44,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784544171] [2023-08-04 02:27:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:27:44,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:27:44,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:27:44,173 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 02:27:44,174 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 02:27:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:27:44,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:27:44,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:27:44,268 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 02:27:44,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:27:44,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784544171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:27:44,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:27:44,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:27:44,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758290660] [2023-08-04 02:27:44,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:27:44,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:27:44,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:27:44,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:27:44,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:27:44,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2023-08-04 02:27:44,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:44,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:27:44,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2023-08-04 02:27:44,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:28:01,501 INFO L124 PetriNetUnfolderBase]: 231779/302096 cut-off events. [2023-08-04 02:28:01,501 INFO L125 PetriNetUnfolderBase]: For 20266/20266 co-relation queries the response was YES. [2023-08-04 02:28:02,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623869 conditions, 302096 events. 231779/302096 cut-off events. For 20266/20266 co-relation queries the response was YES. Maximal size of possible extension queue 4575. Compared 1781713 event pairs, 140339 based on Foata normal form. 0/242944 useless extension candidates. Maximal degree in co-relation 184936. Up to 244925 conditions per place. [2023-08-04 02:28:03,339 INFO L140 encePairwiseOnDemand]: 468/471 looper letters, 90 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-04 02:28:03,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 98 transitions, 487 flow [2023-08-04 02:28:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:28:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:28:03,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-08-04 02:28:03,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49469214437367304 [2023-08-04 02:28:03,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-08-04 02:28:03,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-08-04 02:28:03,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:28:03,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-08-04 02:28:03,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:03,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:03,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:03,344 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 236 flow. Second operand 3 states and 699 transitions. [2023-08-04 02:28:03,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 98 transitions, 487 flow [2023-08-04 02:28:03,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 485 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:28:03,364 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 246 flow [2023-08-04 02:28:03,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-04 02:28:03,364 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 02:28:03,365 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 246 flow [2023-08-04 02:28:03,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:03,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:28:03,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:28:03,370 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 02:28:03,568 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,SelfDestructingSolverStorable13 [2023-08-04 02:28:03,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:28:03,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:28:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1932176946, now seen corresponding path program 1 times [2023-08-04 02:28:03,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:28:03,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793596789] [2023-08-04 02:28:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:03,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:28:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:03,634 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 02:28:03,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:28:03,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793596789] [2023-08-04 02:28:03,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793596789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:28:03,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175162564] [2023-08-04 02:28:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:03,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:28:03,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:28:03,649 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 02:28:03,650 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 02:28:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:03,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:28:03,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:28:03,752 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 02:28:03,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:28:03,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175162564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:28:03,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:28:03,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:28:03,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355956692] [2023-08-04 02:28:03,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:28:03,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:28:03,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:28:03,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:28:03,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:28:03,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2023-08-04 02:28:03,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:03,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:28:03,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2023-08-04 02:28:03,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:28:22,494 INFO L124 PetriNetUnfolderBase]: 214918/282647 cut-off events. [2023-08-04 02:28:22,494 INFO L125 PetriNetUnfolderBase]: For 35112/35112 co-relation queries the response was YES. [2023-08-04 02:28:23,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601599 conditions, 282647 events. 214918/282647 cut-off events. For 35112/35112 co-relation queries the response was YES. Maximal size of possible extension queue 3677. Compared 1677045 event pairs, 127568 based on Foata normal form. 0/234948 useless extension candidates. Maximal degree in co-relation 188134. Up to 214261 conditions per place. [2023-08-04 02:28:24,281 INFO L140 encePairwiseOnDemand]: 468/471 looper letters, 91 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-04 02:28:24,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 499 flow [2023-08-04 02:28:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:28:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:28:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-08-04 02:28:24,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49469214437367304 [2023-08-04 02:28:24,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-08-04 02:28:24,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-08-04 02:28:24,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:28:24,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-08-04 02:28:24,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:24,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:24,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:24,298 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 246 flow. Second operand 3 states and 699 transitions. [2023-08-04 02:28:24,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 499 flow [2023-08-04 02:28:24,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 497 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:28:24,895 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 256 flow [2023-08-04 02:28:24,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2023-08-04 02:28:24,896 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-08-04 02:28:24,896 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 256 flow [2023-08-04 02:28:24,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:24,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:28:24,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:28:24,919 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 02:28:25,113 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,SelfDestructingSolverStorable14 [2023-08-04 02:28:25,114 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:28:25,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:28:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash 137836866, now seen corresponding path program 1 times [2023-08-04 02:28:25,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:28:25,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521023855] [2023-08-04 02:28:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:25,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:28:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:25,169 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 02:28:25,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:28:25,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521023855] [2023-08-04 02:28:25,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521023855] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:28:25,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370476206] [2023-08-04 02:28:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:25,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:28:25,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:28:25,173 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 02:28:25,175 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 02:28:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:25,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:28:25,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:28:25,283 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 02:28:25,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:28:25,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370476206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:28:25,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:28:25,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 02:28:25,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954111063] [2023-08-04 02:28:25,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:28:25,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:28:25,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:28:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:28:25,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:28:25,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2023-08-04 02:28:25,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:25,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:28:25,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2023-08-04 02:28:25,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:28:41,945 INFO L124 PetriNetUnfolderBase]: 213673/281886 cut-off events. [2023-08-04 02:28:41,945 INFO L125 PetriNetUnfolderBase]: For 38416/38416 co-relation queries the response was YES. [2023-08-04 02:28:42,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610028 conditions, 281886 events. 213673/281886 cut-off events. For 38416/38416 co-relation queries the response was YES. Maximal size of possible extension queue 3574. Compared 1674760 event pairs, 145919 based on Foata normal form. 0/238616 useless extension candidates. Maximal degree in co-relation 335242. Up to 243907 conditions per place. [2023-08-04 02:28:43,727 INFO L140 encePairwiseOnDemand]: 468/471 looper letters, 92 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-04 02:28:43,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 511 flow [2023-08-04 02:28:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:28:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:28:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 699 transitions. [2023-08-04 02:28:43,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49469214437367304 [2023-08-04 02:28:43,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 699 transitions. [2023-08-04 02:28:43,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 699 transitions. [2023-08-04 02:28:43,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:28:43,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 699 transitions. [2023-08-04 02:28:43,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:43,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:43,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 471.0) internal successors, (1884), 4 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:43,751 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 256 flow. Second operand 3 states and 699 transitions. [2023-08-04 02:28:43,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 511 flow [2023-08-04 02:28:53,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:28:53,623 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 266 flow [2023-08-04 02:28:53,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=471, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2023-08-04 02:28:53,623 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2023-08-04 02:28:53,623 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 266 flow [2023-08-04 02:28:53,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:53,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:28:53,623 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 02:28:53,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 02:28:53,828 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,SelfDestructingSolverStorable15 [2023-08-04 02:28:53,828 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:28:53,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:28:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash -130945409, now seen corresponding path program 1 times [2023-08-04 02:28:53,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:28:53,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210767038] [2023-08-04 02:28:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:53,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:28:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:53,876 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 02:28:53,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:28:53,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210767038] [2023-08-04 02:28:53,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210767038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:28:53,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609442897] [2023-08-04 02:28:53,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:53,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:28:53,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:28:53,877 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 02:28:53,895 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 02:28:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:53,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:28:54,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:28:54,016 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 02:28:54,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:28:54,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609442897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:28:54,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:28:54,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 02:28:54,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368799692] [2023-08-04 02:28:54,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:28:54,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:28:54,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:28:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:28:54,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:28:54,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 471 [2023-08-04 02:28:54,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:54,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:28:54,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 471 [2023-08-04 02:28:54,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand