./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ff96f1177b851e0082faef897c2fcf87c2462cab57ba2153c754c5e198aaf06 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:06:58,923 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:06:59,019 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:06:59,026 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:06:59,027 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:06:59,062 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:06:59,063 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:06:59,064 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:06:59,064 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:06:59,064 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:06:59,065 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:06:59,065 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:06:59,066 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:06:59,066 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:06:59,066 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:06:59,067 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:06:59,067 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:06:59,068 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:06:59,068 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:06:59,068 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:06:59,069 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:06:59,069 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:06:59,069 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:06:59,070 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:06:59,070 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:06:59,070 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:06:59,071 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:06:59,071 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:06:59,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:06:59,072 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:06:59,072 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:06:59,072 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:06:59,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:06:59,073 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:06:59,073 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:06:59,074 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:06:59,074 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:06:59,074 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:06:59,075 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:06:59,075 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:06:59,075 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:06:59,076 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:06:59,076 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:06:59,076 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ff96f1177b851e0082faef897c2fcf87c2462cab57ba2153c754c5e198aaf06 [2024-06-27 17:06:59,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:06:59,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:06:59,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:06:59,334 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:06:59,335 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:06:59,336 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c [2024-06-27 17:07:00,489 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:07:00,688 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:07:00,689 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c [2024-06-27 17:07:00,696 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/591426447/ecffb2305233427fba9142d683550583/FLAGa07a1ab43 [2024-06-27 17:07:00,708 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/591426447/ecffb2305233427fba9142d683550583 [2024-06-27 17:07:00,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:07:00,711 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:07:00,713 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:07:00,713 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:07:00,717 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:07:00,717 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,718 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8fac9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00, skipping insertion in model container [2024-06-27 17:07:00,718 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,738 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:07:00,899 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c[2996,3009] [2024-06-27 17:07:00,903 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:07:00,911 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:07:00,932 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-threaded-sum-3.wvr.c[2996,3009] [2024-06-27 17:07:00,933 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:07:00,966 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:07:00,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00 WrapperNode [2024-06-27 17:07:00,966 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:07:00,967 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:07:00,967 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:07:00,968 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:07:00,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:00,988 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:01,006 INFO L138 Inliner]: procedures = 21, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2024-06-27 17:07:01,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:07:01,007 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:07:01,008 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:07:01,008 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:07:01,026 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:01,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:01,027 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:01,038 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:07:01,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:01,039 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:01,043 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:01,046 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:01,047 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:01,048 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:01,050 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:07:01,051 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:07:01,051 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:07:01,051 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:07:01,052 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (1/1) ... [2024-06-27 17:07:01,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:07:01,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:01,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:07:01,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:07:01,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:07:01,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:07:01,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:07:01,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:07:01,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:07:01,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 17:07:01,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 17:07:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:07:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:07:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:07:01,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:07:01,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:07:01,155 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:07:01,232 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:07:01,234 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:07:01,458 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:07:01,459 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:07:01,622 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:07:01,622 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 17:07:01,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:07:01 BoogieIcfgContainer [2024-06-27 17:07:01,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:07:01,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:07:01,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:07:01,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:07:01,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:07:00" (1/3) ... [2024-06-27 17:07:01,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a42a136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:07:01, skipping insertion in model container [2024-06-27 17:07:01,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:07:00" (2/3) ... [2024-06-27 17:07:01,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a42a136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:07:01, skipping insertion in model container [2024-06-27 17:07:01,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:07:01" (3/3) ... [2024-06-27 17:07:01,635 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2024-06-27 17:07:01,643 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:07:01,653 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:07:01,653 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:07:01,653 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:07:01,748 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 17:07:01,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 91 flow [2024-06-27 17:07:01,804 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-06-27 17:07:01,805 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 17:07:01,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 3/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-06-27 17:07:01,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 35 transitions, 91 flow [2024-06-27 17:07:01,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 80 flow [2024-06-27 17:07:01,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:07:01,834 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=LoopHeads, 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;@d46966, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:07:01,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 17:07:01,848 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:07:01,848 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2024-06-27 17:07:01,848 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 17:07:01,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:01,849 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] [2024-06-27 17:07:01,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:01,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:01,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1029020577, now seen corresponding path program 1 times [2024-06-27 17:07:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:01,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213304155] [2024-06-27 17:07:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:01,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:02,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:02,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213304155] [2024-06-27 17:07:02,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213304155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:07:02,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:07:02,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:07:02,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574266548] [2024-06-27 17:07:02,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:07:02,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:07:02,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:02,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:07:02,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:07:02,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-06-27 17:07:02,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:02,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:02,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-06-27 17:07:02,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:03,051 INFO L124 PetriNetUnfolderBase]: 367/655 cut-off events. [2024-06-27 17:07:03,052 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-06-27 17:07:03,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 655 events. 367/655 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3337 event pairs, 26 based on Foata normal form. 20/660 useless extension candidates. Maximal degree in co-relation 1074. Up to 445 conditions per place. [2024-06-27 17:07:03,064 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 33 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-06-27 17:07:03,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 204 flow [2024-06-27 17:07:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:07:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:07:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-27 17:07:03,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-27 17:07:03,075 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 80 flow. Second operand 4 states and 95 transitions. [2024-06-27 17:07:03,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 204 flow [2024-06-27 17:07:03,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:07:03,084 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 100 flow [2024-06-27 17:07:03,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-06-27 17:07:03,089 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2024-06-27 17:07:03,089 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 100 flow [2024-06-27 17:07:03,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:03,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:03,091 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] [2024-06-27 17:07:03,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:07:03,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:03,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:03,092 INFO L85 PathProgramCache]: Analyzing trace with hash 631285081, now seen corresponding path program 1 times [2024-06-27 17:07:03,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:03,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835144688] [2024-06-27 17:07:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:03,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:03,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:03,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835144688] [2024-06-27 17:07:03,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835144688] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:03,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086767905] [2024-06-27 17:07:03,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:03,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:03,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:03,631 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) [2024-06-27 17:07:03,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:07:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:03,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:07:03,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:04,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 17:07:04,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086767905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:07:04,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 17:07:04,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2024-06-27 17:07:04,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499003775] [2024-06-27 17:07:04,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:07:04,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:07:04,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:07:04,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:07:04,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2024-06-27 17:07:04,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:04,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:04,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2024-06-27 17:07:04,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:04,396 INFO L124 PetriNetUnfolderBase]: 1042/1669 cut-off events. [2024-06-27 17:07:04,396 INFO L125 PetriNetUnfolderBase]: For 412/448 co-relation queries the response was YES. [2024-06-27 17:07:04,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3716 conditions, 1669 events. 1042/1669 cut-off events. For 412/448 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8714 event pairs, 288 based on Foata normal form. 24/1665 useless extension candidates. Maximal degree in co-relation 2474. Up to 925 conditions per place. [2024-06-27 17:07:04,407 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 59 selfloop transitions, 20 changer transitions 0/87 dead transitions. [2024-06-27 17:07:04,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 87 transitions, 422 flow [2024-06-27 17:07:04,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:07:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:07:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 17:07:04,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6971428571428572 [2024-06-27 17:07:04,410 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 100 flow. Second operand 5 states and 122 transitions. [2024-06-27 17:07:04,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 87 transitions, 422 flow [2024-06-27 17:07:04,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 87 transitions, 422 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:07:04,414 INFO L231 Difference]: Finished difference. Result has 44 places, 53 transitions, 256 flow [2024-06-27 17:07:04,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=44, PETRI_TRANSITIONS=53} [2024-06-27 17:07:04,415 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2024-06-27 17:07:04,415 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 53 transitions, 256 flow [2024-06-27 17:07:04,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:04,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:04,416 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] [2024-06-27 17:07:04,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:07:04,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:04,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:04,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:04,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1270762887, now seen corresponding path program 2 times [2024-06-27 17:07:04,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:04,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256369709] [2024-06-27 17:07:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:04,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:07:04,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:04,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256369709] [2024-06-27 17:07:04,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256369709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:07:04,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:07:04,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:07:04,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409415796] [2024-06-27 17:07:04,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:07:04,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:07:04,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:04,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:07:04,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:07:04,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-06-27 17:07:04,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 53 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:04,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:04,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-06-27 17:07:04,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:05,066 INFO L124 PetriNetUnfolderBase]: 882/1459 cut-off events. [2024-06-27 17:07:05,067 INFO L125 PetriNetUnfolderBase]: For 1530/1609 co-relation queries the response was YES. [2024-06-27 17:07:05,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 1459 events. 882/1459 cut-off events. For 1530/1609 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7916 event pairs, 115 based on Foata normal form. 106/1463 useless extension candidates. Maximal degree in co-relation 2996. Up to 750 conditions per place. [2024-06-27 17:07:05,081 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 62 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2024-06-27 17:07:05,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 83 transitions, 541 flow [2024-06-27 17:07:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:07:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:07:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-27 17:07:05,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-06-27 17:07:05,083 INFO L175 Difference]: Start difference. First operand has 44 places, 53 transitions, 256 flow. Second operand 4 states and 93 transitions. [2024-06-27 17:07:05,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 83 transitions, 541 flow [2024-06-27 17:07:05,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 83 transitions, 541 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:07:05,088 INFO L231 Difference]: Finished difference. Result has 48 places, 57 transitions, 302 flow [2024-06-27 17:07:05,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=48, PETRI_TRANSITIONS=57} [2024-06-27 17:07:05,089 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2024-06-27 17:07:05,089 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 57 transitions, 302 flow [2024-06-27 17:07:05,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:05,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:05,089 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] [2024-06-27 17:07:05,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:07:05,090 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:05,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash -717394264, now seen corresponding path program 1 times [2024-06-27 17:07:05,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:05,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186221589] [2024-06-27 17:07:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:05,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:07:05,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:05,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186221589] [2024-06-27 17:07:05,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186221589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:07:05,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:07:05,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:07:05,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219421938] [2024-06-27 17:07:05,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:07:05,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:07:05,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:05,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:07:05,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:07:05,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-06-27 17:07:05,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 57 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:05,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:05,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-06-27 17:07:05,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:05,584 INFO L124 PetriNetUnfolderBase]: 991/1645 cut-off events. [2024-06-27 17:07:05,584 INFO L125 PetriNetUnfolderBase]: For 1650/1800 co-relation queries the response was YES. [2024-06-27 17:07:05,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5247 conditions, 1645 events. 991/1645 cut-off events. For 1650/1800 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8849 event pairs, 156 based on Foata normal form. 144/1753 useless extension candidates. Maximal degree in co-relation 4128. Up to 1126 conditions per place. [2024-06-27 17:07:05,602 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 66 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-06-27 17:07:05,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 91 transitions, 608 flow [2024-06-27 17:07:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:07:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:07:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 17:07:05,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-27 17:07:05,606 INFO L175 Difference]: Start difference. First operand has 48 places, 57 transitions, 302 flow. Second operand 5 states and 120 transitions. [2024-06-27 17:07:05,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 91 transitions, 608 flow [2024-06-27 17:07:05,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 91 transitions, 600 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:07:05,613 INFO L231 Difference]: Finished difference. Result has 53 places, 66 transitions, 412 flow [2024-06-27 17:07:05,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=412, PETRI_PLACES=53, PETRI_TRANSITIONS=66} [2024-06-27 17:07:05,614 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2024-06-27 17:07:05,614 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 66 transitions, 412 flow [2024-06-27 17:07:05,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:05,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:05,615 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] [2024-06-27 17:07:05,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:07:05,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:05,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:05,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1303098900, now seen corresponding path program 2 times [2024-06-27 17:07:05,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:05,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633094723] [2024-06-27 17:07:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:05,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:05,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:05,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633094723] [2024-06-27 17:07:05,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633094723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:07:05,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:07:05,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:07:05,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876683128] [2024-06-27 17:07:05,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:07:05,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:07:05,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:07:05,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:07:05,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-06-27 17:07:05,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 412 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:05,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:05,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-06-27 17:07:05,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:06,197 INFO L124 PetriNetUnfolderBase]: 1376/2269 cut-off events. [2024-06-27 17:07:06,198 INFO L125 PetriNetUnfolderBase]: For 3567/3817 co-relation queries the response was YES. [2024-06-27 17:07:06,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7623 conditions, 2269 events. 1376/2269 cut-off events. For 3567/3817 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 13463 event pairs, 252 based on Foata normal form. 242/2466 useless extension candidates. Maximal degree in co-relation 4550. Up to 1340 conditions per place. [2024-06-27 17:07:06,220 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 68 selfloop transitions, 20 changer transitions 0/101 dead transitions. [2024-06-27 17:07:06,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 101 transitions, 769 flow [2024-06-27 17:07:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:07:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:07:06,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 17:07:06,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6742857142857143 [2024-06-27 17:07:06,222 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 412 flow. Second operand 5 states and 118 transitions. [2024-06-27 17:07:06,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 101 transitions, 769 flow [2024-06-27 17:07:06,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 101 transitions, 758 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 17:07:06,231 INFO L231 Difference]: Finished difference. Result has 57 places, 68 transitions, 469 flow [2024-06-27 17:07:06,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=469, PETRI_PLACES=57, PETRI_TRANSITIONS=68} [2024-06-27 17:07:06,232 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2024-06-27 17:07:06,233 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 68 transitions, 469 flow [2024-06-27 17:07:06,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:06,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:06,233 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] [2024-06-27 17:07:06,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:07:06,234 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:06,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:06,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1954223470, now seen corresponding path program 3 times [2024-06-27 17:07:06,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:06,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745752703] [2024-06-27 17:07:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:06,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:06,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:06,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745752703] [2024-06-27 17:07:06,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745752703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:07:06,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:07:06,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:07:06,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856974317] [2024-06-27 17:07:06,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:07:06,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:07:06,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:06,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:07:06,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:07:06,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-06-27 17:07:06,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 68 transitions, 469 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:06,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:06,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-06-27 17:07:06,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:06,784 INFO L124 PetriNetUnfolderBase]: 1629/2634 cut-off events. [2024-06-27 17:07:06,784 INFO L125 PetriNetUnfolderBase]: For 4694/5076 co-relation queries the response was YES. [2024-06-27 17:07:06,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9282 conditions, 2634 events. 1629/2634 cut-off events. For 4694/5076 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15412 event pairs, 174 based on Foata normal form. 225/2780 useless extension candidates. Maximal degree in co-relation 4753. Up to 1485 conditions per place. [2024-06-27 17:07:06,808 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 83 selfloop transitions, 13 changer transitions 0/113 dead transitions. [2024-06-27 17:07:06,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 113 transitions, 891 flow [2024-06-27 17:07:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:07:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:07:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-27 17:07:06,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.72 [2024-06-27 17:07:06,810 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 469 flow. Second operand 5 states and 126 transitions. [2024-06-27 17:07:06,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 113 transitions, 891 flow [2024-06-27 17:07:06,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 113 transitions, 859 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:07:06,820 INFO L231 Difference]: Finished difference. Result has 61 places, 75 transitions, 552 flow [2024-06-27 17:07:06,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=552, PETRI_PLACES=61, PETRI_TRANSITIONS=75} [2024-06-27 17:07:06,824 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2024-06-27 17:07:06,824 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 75 transitions, 552 flow [2024-06-27 17:07:06,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:06,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:06,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:06,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:07:06,828 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:06,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:06,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2054220922, now seen corresponding path program 1 times [2024-06-27 17:07:06,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:06,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873285481] [2024-06-27 17:07:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:06,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:07,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:07,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873285481] [2024-06-27 17:07:07,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873285481] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:07,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802475486] [2024-06-27 17:07:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:07,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:07,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:07,071 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) [2024-06-27 17:07:07,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:07:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:07,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 17:07:07,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:07,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:07,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802475486] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:07,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 17:07:07,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 18 [2024-06-27 17:07:07,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528982780] [2024-06-27 17:07:07,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:07:07,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:07:07,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:07:07,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:07:07,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2024-06-27 17:07:07,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 75 transitions, 552 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:07,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:07,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2024-06-27 17:07:07,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:08,871 INFO L124 PetriNetUnfolderBase]: 6100/9215 cut-off events. [2024-06-27 17:07:08,872 INFO L125 PetriNetUnfolderBase]: For 20887/21688 co-relation queries the response was YES. [2024-06-27 17:07:08,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33774 conditions, 9215 events. 6100/9215 cut-off events. For 20887/21688 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 57201 event pairs, 499 based on Foata normal form. 322/9486 useless extension candidates. Maximal degree in co-relation 18817. Up to 3086 conditions per place. [2024-06-27 17:07:08,955 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 147 selfloop transitions, 80 changer transitions 0/234 dead transitions. [2024-06-27 17:07:08,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 2099 flow [2024-06-27 17:07:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:07:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:07:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 17:07:08,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028571428571429 [2024-06-27 17:07:08,958 INFO L175 Difference]: Start difference. First operand has 61 places, 75 transitions, 552 flow. Second operand 10 states and 211 transitions. [2024-06-27 17:07:08,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 2099 flow [2024-06-27 17:07:09,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 234 transitions, 2084 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:07:09,009 INFO L231 Difference]: Finished difference. Result has 78 places, 149 transitions, 1539 flow [2024-06-27 17:07:09,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1539, PETRI_PLACES=78, PETRI_TRANSITIONS=149} [2024-06-27 17:07:09,009 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 40 predicate places. [2024-06-27 17:07:09,010 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 149 transitions, 1539 flow [2024-06-27 17:07:09,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:09,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:09,010 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] [2024-06-27 17:07:09,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 17:07:09,224 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,SelfDestructingSolverStorable6 [2024-06-27 17:07:09,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:09,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1263224652, now seen corresponding path program 2 times [2024-06-27 17:07:09,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:09,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348686828] [2024-06-27 17:07:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:09,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:09,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348686828] [2024-06-27 17:07:09,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348686828] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284796162] [2024-06-27 17:07:09,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:07:09,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:09,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:09,530 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) [2024-06-27 17:07:09,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 17:07:09,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:07:09,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:09,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:07:09,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:09,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:09,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284796162] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:09,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:09,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 9 [2024-06-27 17:07:09,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700789895] [2024-06-27 17:07:09,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:09,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:07:09,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:07:09,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:07:09,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-06-27 17:07:09,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 149 transitions, 1539 flow. Second operand has 10 states, 10 states have (on average 17.1) internal successors, (171), 10 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:09,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:09,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-06-27 17:07:09,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:11,438 INFO L124 PetriNetUnfolderBase]: 6472/10261 cut-off events. [2024-06-27 17:07:11,438 INFO L125 PetriNetUnfolderBase]: For 52693/53816 co-relation queries the response was YES. [2024-06-27 17:07:11,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47840 conditions, 10261 events. 6472/10261 cut-off events. For 52693/53816 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 69865 event pairs, 677 based on Foata normal form. 491/10637 useless extension candidates. Maximal degree in co-relation 32336. Up to 2557 conditions per place. [2024-06-27 17:07:11,543 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 169 selfloop transitions, 59 changer transitions 0/251 dead transitions. [2024-06-27 17:07:11,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 251 transitions, 2830 flow [2024-06-27 17:07:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:07:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:07:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 17:07:11,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 17:07:11,545 INFO L175 Difference]: Start difference. First operand has 78 places, 149 transitions, 1539 flow. Second operand 7 states and 161 transitions. [2024-06-27 17:07:11,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 251 transitions, 2830 flow [2024-06-27 17:07:11,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 251 transitions, 2766 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-27 17:07:11,706 INFO L231 Difference]: Finished difference. Result has 87 places, 170 transitions, 1937 flow [2024-06-27 17:07:11,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1937, PETRI_PLACES=87, PETRI_TRANSITIONS=170} [2024-06-27 17:07:11,707 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2024-06-27 17:07:11,707 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 170 transitions, 1937 flow [2024-06-27 17:07:11,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.1) internal successors, (171), 10 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:11,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:11,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:11,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 17:07:11,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:11,924 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:11,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:11,924 INFO L85 PathProgramCache]: Analyzing trace with hash 547899612, now seen corresponding path program 3 times [2024-06-27 17:07:11,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:11,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631763107] [2024-06-27 17:07:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:11,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631763107] [2024-06-27 17:07:14,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631763107] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:14,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463918111] [2024-06-27 17:07:14,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:07:14,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:14,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:14,869 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) [2024-06-27 17:07:14,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 17:07:15,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:07:15,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:15,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 17:07:15,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:16,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:17,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463918111] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:17,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:17,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-06-27 17:07:17,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93332693] [2024-06-27 17:07:17,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:17,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 17:07:17,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:17,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 17:07:17,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2024-06-27 17:07:17,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:07:17,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 170 transitions, 1937 flow. Second operand has 26 states, 26 states have (on average 9.76923076923077) internal successors, (254), 26 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:17,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:17,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:07:17,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:46,130 WARN L293 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 99 DAG size of output: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:08:09,665 INFO L124 PetriNetUnfolderBase]: 68007/97484 cut-off events. [2024-06-27 17:08:09,665 INFO L125 PetriNetUnfolderBase]: For 565858/565858 co-relation queries the response was YES. [2024-06-27 17:08:10,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472129 conditions, 97484 events. 68007/97484 cut-off events. For 565858/565858 co-relation queries the response was YES. Maximal size of possible extension queue 3847. Compared 698551 event pairs, 2673 based on Foata normal form. 122/97605 useless extension candidates. Maximal degree in co-relation 355211. Up to 18091 conditions per place. [2024-06-27 17:08:10,819 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 1263 selfloop transitions, 1219 changer transitions 932/3418 dead transitions. [2024-06-27 17:08:10,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 3418 transitions, 37585 flow [2024-06-27 17:08:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2024-06-27 17:08:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2024-06-27 17:08:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 3121 transitions. [2024-06-27 17:08:10,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49816440542697527 [2024-06-27 17:08:10,834 INFO L175 Difference]: Start difference. First operand has 87 places, 170 transitions, 1937 flow. Second operand 179 states and 3121 transitions. [2024-06-27 17:08:10,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 3418 transitions, 37585 flow [2024-06-27 17:08:13,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 3418 transitions, 36824 flow, removed 375 selfloop flow, removed 1 redundant places. [2024-06-27 17:08:13,624 INFO L231 Difference]: Finished difference. Result has 362 places, 1462 transitions, 21110 flow [2024-06-27 17:08:13,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=179, PETRI_FLOW=21110, PETRI_PLACES=362, PETRI_TRANSITIONS=1462} [2024-06-27 17:08:13,626 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 324 predicate places. [2024-06-27 17:08:13,626 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1462 transitions, 21110 flow [2024-06-27 17:08:13,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.76923076923077) internal successors, (254), 26 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:08:13,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:08:13,626 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] [2024-06-27 17:08:13,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-27 17:08:13,827 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 [2024-06-27 17:08:13,827 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:08:13,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:08:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash 134141366, now seen corresponding path program 4 times [2024-06-27 17:08:13,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:08:13,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659383700] [2024-06-27 17:08:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:08:13,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:08:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:08:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:15,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:08:15,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659383700] [2024-06-27 17:08:15,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659383700] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:08:15,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099767181] [2024-06-27 17:08:15,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:08:15,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:08:15,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:08:15,569 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) [2024-06-27 17:08:15,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 17:08:15,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:08:15,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:08:15,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 17:08:15,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:08:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:16,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:08:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:08:30,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099767181] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:08:30,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:08:30,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-06-27 17:08:30,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401996214] [2024-06-27 17:08:30,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:08:30,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 17:08:30,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:08:30,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 17:08:30,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=392, Unknown=1, NotChecked=0, Total=506 [2024-06-27 17:08:34,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:08:38,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:08:40,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-06-27 17:08:40,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-06-27 17:08:40,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1462 transitions, 21110 flow. Second operand has 23 states, 23 states have (on average 10.652173913043478) internal successors, (245), 23 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:08:40,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:08:40,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-06-27 17:08:40,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand