./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 22:25:04,865 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 22:25:04,966 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-10 22:25:04,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 22:25:04,970 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 22:25:04,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 22:25:04,992 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 22:25:04,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 22:25:04,993 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 22:25:04,994 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 22:25:04,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 22:25:04,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 22:25:04,995 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 22:25:04,995 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 22:25:04,996 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 22:25:04,996 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 22:25:04,997 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 22:25:04,997 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 22:25:04,997 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 22:25:04,998 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 22:25:04,998 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 22:25:04,999 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 22:25:04,999 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 22:25:04,999 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 22:25:05,000 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 22:25:05,000 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-10 22:25:05,001 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 22:25:05,001 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 22:25:05,001 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 22:25:05,002 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 22:25:05,002 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 22:25:05,002 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 22:25:05,003 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 22:25:05,003 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 22:25:05,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 22:25:05,004 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 22:25:05,004 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 22:25:05,004 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 22:25:05,005 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 22:25:05,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 22:25:05,005 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 22:25:05,006 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 22:25:05,006 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 22:25:05,006 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 22:25:05,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-11-10 22:25:05,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 22:25:05,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 22:25:05,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 22:25:05,288 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 22:25:05,289 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 22:25:05,290 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-10 22:25:06,774 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 22:25:06,957 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 22:25:06,958 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-10 22:25:06,966 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62173e87d/970c405991b64d3c87c877e877e7203e/FLAGcad35bb0c [2024-11-10 22:25:06,980 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62173e87d/970c405991b64d3c87c877e877e7203e [2024-11-10 22:25:06,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 22:25:06,984 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 22:25:06,989 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 22:25:06,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 22:25:06,996 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 22:25:06,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:25:06" (1/1) ... [2024-11-10 22:25:06,998 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bb590da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:06, skipping insertion in model container [2024-11-10 22:25:06,998 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:25:06" (1/1) ... [2024-11-10 22:25:07,022 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 22:25:07,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 22:25:07,313 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 22:25:07,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 22:25:07,375 INFO L204 MainTranslator]: Completed translation [2024-11-10 22:25:07,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07 WrapperNode [2024-11-10 22:25:07,376 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 22:25:07,378 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 22:25:07,378 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 22:25:07,378 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 22:25:07,384 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,396 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,432 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 23, statements flattened = 324 [2024-11-10 22:25:07,433 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 22:25:07,434 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 22:25:07,434 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 22:25:07,434 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 22:25:07,445 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,446 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,450 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,479 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 22:25:07,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,484 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,492 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,492 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,494 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,495 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,498 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 22:25:07,499 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 22:25:07,500 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 22:25:07,500 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 22:25:07,501 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (1/1) ... [2024-11-10 22:25:07,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 22:25:07,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:25:07,538 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) [2024-11-10 22:25:07,541 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 [2024-11-10 22:25:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 22:25:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 22:25:07,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 22:25:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 22:25:07,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 22:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 22:25:07,579 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 22:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 22:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 22:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 22:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 22:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 22:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 22:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 22:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 22:25:07,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 22:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 22:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 22:25:07,582 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 22:25:07,689 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 22:25:07,691 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 22:25:08,163 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 22:25:08,163 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 22:25:08,684 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 22:25:08,684 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 22:25:08,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:25:08 BoogieIcfgContainer [2024-11-10 22:25:08,684 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 22:25:08,688 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 22:25:08,688 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 22:25:08,692 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 22:25:08,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:25:06" (1/3) ... [2024-11-10 22:25:08,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ebbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:25:08, skipping insertion in model container [2024-11-10 22:25:08,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:07" (2/3) ... [2024-11-10 22:25:08,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ebbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:25:08, skipping insertion in model container [2024-11-10 22:25:08,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:25:08" (3/3) ... [2024-11-10 22:25:08,694 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-11-10 22:25:08,712 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 22:25:08,713 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-10 22:25:08,713 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 22:25:08,848 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 22:25:08,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 113 transitions, 247 flow [2024-11-10 22:25:08,967 INFO L124 PetriNetUnfolderBase]: 16/110 cut-off events. [2024-11-10 22:25:08,967 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 22:25:08,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 110 events. 16/110 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 416 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2024-11-10 22:25:08,974 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 113 transitions, 247 flow [2024-11-10 22:25:08,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 108 transitions, 231 flow [2024-11-10 22:25:08,991 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 22:25:09,001 INFO L333 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, 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;@44131997, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 22:25:09,003 INFO L334 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2024-11-10 22:25:09,007 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 22:25:09,007 INFO L124 PetriNetUnfolderBase]: 2/8 cut-off events. [2024-11-10 22:25:09,007 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 22:25:09,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:25:09,008 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 22:25:09,010 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2024-11-10 22:25:09,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:25:09,016 INFO L85 PathProgramCache]: Analyzing trace with hash 29926898, now seen corresponding path program 1 times [2024-11-10 22:25:09,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:25:09,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047259706] [2024-11-10 22:25:09,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:09,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:25:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:09,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:25:09,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047259706] [2024-11-10 22:25:09,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047259706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:25:09,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:25:09,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 22:25:09,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152452838] [2024-11-10 22:25:09,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:25:09,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 22:25:09,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:25:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 22:25:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 22:25:09,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 113 [2024-11-10 22:25:09,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 108 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:09,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:25:09,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 113 [2024-11-10 22:25:09,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:25:12,081 INFO L124 PetriNetUnfolderBase]: 13136/21872 cut-off events. [2024-11-10 22:25:12,082 INFO L125 PetriNetUnfolderBase]: For 686/686 co-relation queries the response was YES. [2024-11-10 22:25:12,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40508 conditions, 21872 events. 13136/21872 cut-off events. For 686/686 co-relation queries the response was YES. Maximal size of possible extension queue 1287. Compared 174669 event pairs, 10944 based on Foata normal form. 1099/16099 useless extension candidates. Maximal degree in co-relation 39082. Up to 18076 conditions per place. [2024-11-10 22:25:12,244 INFO L140 encePairwiseOnDemand]: 91/113 looper letters, 53 selfloop transitions, 6 changer transitions 0/92 dead transitions. [2024-11-10 22:25:12,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 92 transitions, 317 flow [2024-11-10 22:25:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 22:25:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 22:25:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 219 transitions. [2024-11-10 22:25:12,258 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48451327433628316 [2024-11-10 22:25:12,260 INFO L175 Difference]: Start difference. First operand has 102 places, 108 transitions, 231 flow. Second operand 4 states and 219 transitions. [2024-11-10 22:25:12,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 92 transitions, 317 flow [2024-11-10 22:25:12,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 92 transitions, 308 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-10 22:25:12,273 INFO L231 Difference]: Finished difference. Result has 92 places, 92 transitions, 202 flow [2024-11-10 22:25:12,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2024-11-10 22:25:12,280 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -10 predicate places. [2024-11-10 22:25:12,280 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 202 flow [2024-11-10 22:25:12,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:12,281 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:25:12,281 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-10 22:25:12,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 22:25:12,282 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2024-11-10 22:25:12,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:25:12,283 INFO L85 PathProgramCache]: Analyzing trace with hash 927734685, now seen corresponding path program 1 times [2024-11-10 22:25:12,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:25:12,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671303498] [2024-11-10 22:25:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:12,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:25:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:12,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:25:12,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671303498] [2024-11-10 22:25:12,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671303498] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:25:12,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:25:12,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 22:25:12,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31055208] [2024-11-10 22:25:12,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:25:12,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 22:25:12,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:25:12,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 22:25:12,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 22:25:12,436 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 113 [2024-11-10 22:25:12,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:12,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:25:12,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 113 [2024-11-10 22:25:12,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:25:14,668 INFO L124 PetriNetUnfolderBase]: 13138/21884 cut-off events. [2024-11-10 22:25:14,669 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-11-10 22:25:14,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40339 conditions, 21884 events. 13138/21884 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 1287. Compared 174716 event pairs, 10944 based on Foata normal form. 2/15016 useless extension candidates. Maximal degree in co-relation 40283. Up to 18085 conditions per place. [2024-11-10 22:25:14,789 INFO L140 encePairwiseOnDemand]: 104/113 looper letters, 58 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2024-11-10 22:25:14,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 354 flow [2024-11-10 22:25:14,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 22:25:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 22:25:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2024-11-10 22:25:14,792 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4668141592920354 [2024-11-10 22:25:14,792 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 202 flow. Second operand 4 states and 211 transitions. [2024-11-10 22:25:14,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 354 flow [2024-11-10 22:25:14,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 98 transitions, 332 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 22:25:14,798 INFO L231 Difference]: Finished difference. Result has 95 places, 98 transitions, 246 flow [2024-11-10 22:25:14,798 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=95, PETRI_TRANSITIONS=98} [2024-11-10 22:25:14,799 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -7 predicate places. [2024-11-10 22:25:14,799 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 98 transitions, 246 flow [2024-11-10 22:25:14,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:14,800 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:25:14,800 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-11-10 22:25:14,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 22:25:14,800 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2024-11-10 22:25:14,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:25:14,801 INFO L85 PathProgramCache]: Analyzing trace with hash 941208556, now seen corresponding path program 1 times [2024-11-10 22:25:14,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:25:14,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990831816] [2024-11-10 22:25:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:14,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:25:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:14,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:25:14,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990831816] [2024-11-10 22:25:14,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990831816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 22:25:14,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243247907] [2024-11-10 22:25:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:14,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 22:25:14,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:25:14,929 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) [2024-11-10 22:25:14,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 22:25:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:15,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 22:25:15,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 22:25:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:15,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 22:25:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:15,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243247907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 22:25:15,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 22:25:15,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-10 22:25:15,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250593526] [2024-11-10 22:25:15,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 22:25:15,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 22:25:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:25:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 22:25:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-10 22:25:15,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 113 [2024-11-10 22:25:15,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 98 transitions, 246 flow. Second operand has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:15,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:25:15,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 113 [2024-11-10 22:25:15,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:25:17,086 INFO L124 PetriNetUnfolderBase]: 13144/21920 cut-off events. [2024-11-10 22:25:17,086 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2024-11-10 22:25:17,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40427 conditions, 21920 events. 13144/21920 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 1286. Compared 175189 event pairs, 10944 based on Foata normal form. 0/15048 useless extension candidates. Maximal degree in co-relation 40298. Up to 18088 conditions per place. [2024-11-10 22:25:17,215 INFO L140 encePairwiseOnDemand]: 104/113 looper letters, 58 selfloop transitions, 25 changer transitions 0/116 dead transitions. [2024-11-10 22:25:17,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 116 transitions, 490 flow [2024-11-10 22:25:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 22:25:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 22:25:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 449 transitions. [2024-11-10 22:25:17,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3973451327433628 [2024-11-10 22:25:17,219 INFO L175 Difference]: Start difference. First operand has 95 places, 98 transitions, 246 flow. Second operand 10 states and 449 transitions. [2024-11-10 22:25:17,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 116 transitions, 490 flow [2024-11-10 22:25:17,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 116 transitions, 490 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 22:25:17,226 INFO L231 Difference]: Finished difference. Result has 107 places, 116 transitions, 408 flow [2024-11-10 22:25:17,227 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=408, PETRI_PLACES=107, PETRI_TRANSITIONS=116} [2024-11-10 22:25:17,228 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 5 predicate places. [2024-11-10 22:25:17,229 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 116 transitions, 408 flow [2024-11-10 22:25:17,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:17,230 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:25:17,230 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 22:25:17,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 22:25:17,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 22:25:17,431 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2024-11-10 22:25:17,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:25:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2142523535, now seen corresponding path program 1 times [2024-11-10 22:25:17,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:25:17,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940920819] [2024-11-10 22:25:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:17,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:25:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:17,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:25:17,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940920819] [2024-11-10 22:25:17,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940920819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:25:17,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:25:17,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 22:25:17,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489895743] [2024-11-10 22:25:17,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:25:17,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 22:25:17,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:25:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 22:25:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 22:25:17,624 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 113 [2024-11-10 22:25:17,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 116 transitions, 408 flow. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:17,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:25:17,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 113 [2024-11-10 22:25:17,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:25:19,821 INFO L124 PetriNetUnfolderBase]: 13144/21946 cut-off events. [2024-11-10 22:25:19,821 INFO L125 PetriNetUnfolderBase]: For 350/350 co-relation queries the response was YES. [2024-11-10 22:25:19,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40551 conditions, 21946 events. 13144/21946 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 1286. Compared 175385 event pairs, 10944 based on Foata normal form. 5/15081 useless extension candidates. Maximal degree in co-relation 40452. Up to 18112 conditions per place. [2024-11-10 22:25:19,931 INFO L140 encePairwiseOnDemand]: 108/113 looper letters, 90 selfloop transitions, 4 changer transitions 1/128 dead transitions. [2024-11-10 22:25:19,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 128 transitions, 672 flow [2024-11-10 22:25:19,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 22:25:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 22:25:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-11-10 22:25:19,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45486725663716815 [2024-11-10 22:25:19,933 INFO L175 Difference]: Start difference. First operand has 107 places, 116 transitions, 408 flow. Second operand 5 states and 257 transitions. [2024-11-10 22:25:19,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 128 transitions, 672 flow [2024-11-10 22:25:19,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 128 transitions, 589 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-11-10 22:25:19,939 INFO L231 Difference]: Finished difference. Result has 109 places, 117 transitions, 370 flow [2024-11-10 22:25:19,939 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=370, PETRI_PLACES=109, PETRI_TRANSITIONS=117} [2024-11-10 22:25:19,940 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 7 predicate places. [2024-11-10 22:25:19,940 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 370 flow [2024-11-10 22:25:19,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:19,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:25:19,941 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 22:25:19,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 22:25:19,941 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2024-11-10 22:25:19,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:25:19,942 INFO L85 PathProgramCache]: Analyzing trace with hash 324772128, now seen corresponding path program 1 times [2024-11-10 22:25:19,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:25:19,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95532608] [2024-11-10 22:25:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:19,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:25:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 22:25:20,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:25:20,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95532608] [2024-11-10 22:25:20,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95532608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:25:20,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:25:20,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 22:25:20,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345876212] [2024-11-10 22:25:20,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:25:20,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 22:25:20,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:25:20,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 22:25:20,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-10 22:25:20,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 113 [2024-11-10 22:25:20,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 370 flow. Second operand has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:20,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:25:20,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 113 [2024-11-10 22:25:20,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:25:23,349 INFO L124 PetriNetUnfolderBase]: 20193/32916 cut-off events. [2024-11-10 22:25:23,349 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2024-11-10 22:25:23,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61480 conditions, 32916 events. 20193/32916 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 1582. Compared 266670 event pairs, 14283 based on Foata normal form. 0/23821 useless extension candidates. Maximal degree in co-relation 61389. Up to 18121 conditions per place. [2024-11-10 22:25:23,528 INFO L140 encePairwiseOnDemand]: 104/113 looper letters, 182 selfloop transitions, 12 changer transitions 0/227 dead transitions. [2024-11-10 22:25:23,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 227 transitions, 990 flow [2024-11-10 22:25:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 22:25:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 22:25:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 439 transitions. [2024-11-10 22:25:23,532 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5549936788874842 [2024-11-10 22:25:23,533 INFO L175 Difference]: Start difference. First operand has 109 places, 117 transitions, 370 flow. Second operand 7 states and 439 transitions. [2024-11-10 22:25:23,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 227 transitions, 990 flow [2024-11-10 22:25:23,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 227 transitions, 986 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-10 22:25:23,542 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 428 flow [2024-11-10 22:25:23,546 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=428, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-11-10 22:25:23,547 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 16 predicate places. [2024-11-10 22:25:23,547 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 428 flow [2024-11-10 22:25:23,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:23,547 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:25:23,548 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 22:25:23,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 22:25:23,548 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2024-11-10 22:25:23,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:25:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1478001193, now seen corresponding path program 1 times [2024-11-10 22:25:23,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:25:23,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945474275] [2024-11-10 22:25:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:23,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:25:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 22:25:23,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:25:23,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945474275] [2024-11-10 22:25:23,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945474275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 22:25:23,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 22:25:23,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 22:25:23,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121476227] [2024-11-10 22:25:23,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 22:25:23,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 22:25:23,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:25:23,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 22:25:23,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 22:25:23,631 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 113 [2024-11-10 22:25:23,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 428 flow. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:23,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:25:23,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 113 [2024-11-10 22:25:23,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:25:29,014 INFO L124 PetriNetUnfolderBase]: 40351/64647 cut-off events. [2024-11-10 22:25:29,015 INFO L125 PetriNetUnfolderBase]: For 8924/8924 co-relation queries the response was YES. [2024-11-10 22:25:29,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130754 conditions, 64647 events. 40351/64647 cut-off events. For 8924/8924 co-relation queries the response was YES. Maximal size of possible extension queue 2227. Compared 537435 event pairs, 24030 based on Foata normal form. 732/47149 useless extension candidates. Maximal degree in co-relation 130659. Up to 33918 conditions per place. [2024-11-10 22:25:29,393 INFO L140 encePairwiseOnDemand]: 107/113 looper letters, 165 selfloop transitions, 5 changer transitions 0/205 dead transitions. [2024-11-10 22:25:29,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 205 transitions, 966 flow [2024-11-10 22:25:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 22:25:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 22:25:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 292 transitions. [2024-11-10 22:25:29,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6460176991150443 [2024-11-10 22:25:29,395 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 428 flow. Second operand 4 states and 292 transitions. [2024-11-10 22:25:29,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 205 transitions, 966 flow [2024-11-10 22:25:29,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 205 transitions, 952 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 22:25:29,418 INFO L231 Difference]: Finished difference. Result has 121 places, 126 transitions, 457 flow [2024-11-10 22:25:29,418 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=457, PETRI_PLACES=121, PETRI_TRANSITIONS=126} [2024-11-10 22:25:29,419 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 19 predicate places. [2024-11-10 22:25:29,419 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 126 transitions, 457 flow [2024-11-10 22:25:29,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:29,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:25:29,420 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 22:25:29,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 22:25:29,420 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2024-11-10 22:25:29,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:25:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1119907803, now seen corresponding path program 1 times [2024-11-10 22:25:29,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:25:29,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752681929] [2024-11-10 22:25:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:25:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:29,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:25:29,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752681929] [2024-11-10 22:25:29,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752681929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 22:25:29,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245518126] [2024-11-10 22:25:29,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:29,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 22:25:29,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:25:29,564 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) [2024-11-10 22:25:29,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 22:25:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:29,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 22:25:29,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 22:25:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:29,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 22:25:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:29,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245518126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 22:25:29,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 22:25:29,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-10 22:25:29,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558647347] [2024-11-10 22:25:29,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 22:25:29,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-10 22:25:29,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:25:29,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-10 22:25:29,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-10 22:25:30,026 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 113 [2024-11-10 22:25:30,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 126 transitions, 457 flow. Second operand has 17 states, 17 states have (on average 34.8235294117647) internal successors, (592), 17 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:30,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:25:30,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 113 [2024-11-10 22:25:30,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 22:25:37,456 INFO L124 PetriNetUnfolderBase]: 49228/83546 cut-off events. [2024-11-10 22:25:37,457 INFO L125 PetriNetUnfolderBase]: For 30107/30363 co-relation queries the response was YES. [2024-11-10 22:25:37,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178240 conditions, 83546 events. 49228/83546 cut-off events. For 30107/30363 co-relation queries the response was YES. Maximal size of possible extension queue 2762. Compared 768687 event pairs, 34206 based on Foata normal form. 0/61424 useless extension candidates. Maximal degree in co-relation 178108. Up to 50096 conditions per place. [2024-11-10 22:25:37,961 INFO L140 encePairwiseOnDemand]: 101/113 looper letters, 209 selfloop transitions, 33 changer transitions 0/272 dead transitions. [2024-11-10 22:25:37,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 272 transitions, 1486 flow [2024-11-10 22:25:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 22:25:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 22:25:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 575 transitions. [2024-11-10 22:25:37,964 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42404129793510326 [2024-11-10 22:25:37,964 INFO L175 Difference]: Start difference. First operand has 121 places, 126 transitions, 457 flow. Second operand 12 states and 575 transitions. [2024-11-10 22:25:37,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 272 transitions, 1486 flow [2024-11-10 22:25:37,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 272 transitions, 1474 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 22:25:37,993 INFO L231 Difference]: Finished difference. Result has 137 places, 145 transitions, 708 flow [2024-11-10 22:25:37,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=708, PETRI_PLACES=137, PETRI_TRANSITIONS=145} [2024-11-10 22:25:37,994 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 35 predicate places. [2024-11-10 22:25:37,994 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 145 transitions, 708 flow [2024-11-10 22:25:37,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 34.8235294117647) internal successors, (592), 17 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:37,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 22:25:37,995 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1] [2024-11-10 22:25:38,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 22:25:38,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-10 22:25:38,196 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2024-11-10 22:25:38,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 22:25:38,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1327562713, now seen corresponding path program 2 times [2024-11-10 22:25:38,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 22:25:38,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80467062] [2024-11-10 22:25:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 22:25:38,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 22:25:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 22:25:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 22:25:38,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 22:25:38,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80467062] [2024-11-10 22:25:38,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80467062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 22:25:38,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208041930] [2024-11-10 22:25:38,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 22:25:38,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 22:25:38,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 22:25:38,347 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) [2024-11-10 22:25:38,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 22:25:38,436 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 22:25:38,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 22:25:38,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 22:25:38,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 22:25:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-10 22:25:38,491 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 22:25:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-10 22:25:38,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208041930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 22:25:38,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 22:25:38,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2024-11-10 22:25:38,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178094587] [2024-11-10 22:25:38,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 22:25:38,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 22:25:38,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 22:25:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 22:25:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-10 22:25:38,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 113 [2024-11-10 22:25:38,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 145 transitions, 708 flow. Second operand has 14 states, 14 states have (on average 35.142857142857146) internal successors, (492), 14 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 22:25:38,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 22:25:38,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 113 [2024-11-10 22:25:38,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand