./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 3289d67d 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-channel-sum.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 bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 07:54:43,547 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 07:54:43,622 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-17 07:54:43,626 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 07:54:43,627 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 07:54:43,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 07:54:43,645 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 07:54:43,645 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 07:54:43,646 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 07:54:43,647 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 07:54:43,647 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 07:54:43,648 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 07:54:43,648 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 07:54:43,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 07:54:43,650 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 07:54:43,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 07:54:43,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-17 07:54:43,650 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 07:54:43,650 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 07:54:43,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 07:54:43,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 07:54:43,651 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-17 07:54:43,654 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 07:54:43,654 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-17 07:54:43,654 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 07:54:43,654 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-17 07:54:43,655 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 07:54:43,655 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 07:54:43,655 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-17 07:54:43,655 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 07:54:43,655 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 07:54:43,655 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 07:54:43,656 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 07:54:43,656 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 07:54:43,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 07:54:43,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 07:54:43,656 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 07:54:43,656 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-17 07:54:43,656 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 07:54:43,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 07:54:43,657 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 07:54:43,657 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 07:54:43,657 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 07:54:43,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 07:54:43,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 [2024-11-17 07:54:43,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 07:54:43,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 07:54:43,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 07:54:43,848 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 07:54:43,849 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 07:54:43,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-17 07:54:45,059 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 07:54:45,213 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 07:54:45,213 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-17 07:54:45,219 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bf6ee009/b798cb9821db463b8ba98fc3586cb9d5/FLAG50cf3a2c6 [2024-11-17 07:54:45,229 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bf6ee009/b798cb9821db463b8ba98fc3586cb9d5 [2024-11-17 07:54:45,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 07:54:45,233 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 07:54:45,235 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 07:54:45,235 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 07:54:45,239 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 07:54:45,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,240 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@453410a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45, skipping insertion in model container [2024-11-17 07:54:45,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,262 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 07:54:45,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 07:54:45,428 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 07:54:45,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 07:54:45,461 INFO L204 MainTranslator]: Completed translation [2024-11-17 07:54:45,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45 WrapperNode [2024-11-17 07:54:45,461 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 07:54:45,462 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 07:54:45,462 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 07:54:45,462 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 07:54:45,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,473 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,489 INFO L138 Inliner]: procedures = 21, calls = 22, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 144 [2024-11-17 07:54:45,489 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 07:54:45,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 07:54:45,490 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 07:54:45,490 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 07:54:45,498 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,498 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,500 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,518 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-17 07:54:45,518 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,518 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,522 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,522 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,523 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,524 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,526 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 07:54:45,526 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 07:54:45,527 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 07:54:45,527 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 07:54:45,527 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (1/1) ... [2024-11-17 07:54:45,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 07:54:45,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:45,554 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) [2024-11-17 07:54:45,567 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 [2024-11-17 07:54:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 07:54:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 07:54:45,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 07:54:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 07:54:45,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 07:54:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 07:54:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 07:54:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 07:54:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 07:54:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 07:54:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 07:54:45,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 07:54:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 07:54:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 07:54:45,624 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 07:54:45,716 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 07:54:45,718 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 07:54:45,917 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 07:54:45,917 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 07:54:46,050 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 07:54:46,050 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 07:54:46,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 07:54:46 BoogieIcfgContainer [2024-11-17 07:54:46,051 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 07:54:46,052 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 07:54:46,052 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 07:54:46,055 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 07:54:46,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 07:54:45" (1/3) ... [2024-11-17 07:54:46,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5253cf82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 07:54:46, skipping insertion in model container [2024-11-17 07:54:46,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 07:54:45" (2/3) ... [2024-11-17 07:54:46,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5253cf82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 07:54:46, skipping insertion in model container [2024-11-17 07:54:46,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 07:54:46" (3/3) ... [2024-11-17 07:54:46,057 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-11-17 07:54:46,068 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 07:54:46,068 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-17 07:54:46,068 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 07:54:46,107 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 07:54:46,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 54 transitions, 122 flow [2024-11-17 07:54:46,164 INFO L124 PetriNetUnfolderBase]: 7/52 cut-off events. [2024-11-17 07:54:46,165 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 07:54:46,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 52 events. 7/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 128 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-17 07:54:46,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 54 transitions, 122 flow [2024-11-17 07:54:46,171 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 50 transitions, 109 flow [2024-11-17 07:54:46,178 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 07:54:46,183 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;@599d382f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 07:54:46,184 INFO L334 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2024-11-17 07:54:46,187 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 07:54:46,187 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2024-11-17 07:54:46,187 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 07:54:46,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:46,188 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:46,191 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:46,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:46,196 INFO L85 PathProgramCache]: Analyzing trace with hash 270130237, now seen corresponding path program 1 times [2024-11-17 07:54:46,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:46,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125668458] [2024-11-17 07:54:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:46,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:46,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125668458] [2024-11-17 07:54:46,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125668458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:46,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:54:46,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 07:54:46,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329932232] [2024-11-17 07:54:46,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:46,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:54:46,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:46,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:54:46,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:54:46,466 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-17 07:54:46,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:46,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:46,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-17 07:54:46,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:46,633 INFO L124 PetriNetUnfolderBase]: 366/669 cut-off events. [2024-11-17 07:54:46,634 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-17 07:54:46,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 669 events. 366/669 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3445 event pairs, 277 based on Foata normal form. 61/551 useless extension candidates. Maximal degree in co-relation 1167. Up to 570 conditions per place. [2024-11-17 07:54:46,639 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 32 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-17 07:54:46,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 181 flow [2024-11-17 07:54:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 07:54:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 07:54:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-17 07:54:46,648 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-11-17 07:54:46,650 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 109 flow. Second operand 4 states and 106 transitions. [2024-11-17 07:54:46,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 181 flow [2024-11-17 07:54:46,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 07:54:46,654 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 127 flow [2024-11-17 07:54:46,655 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-17 07:54:46,660 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-11-17 07:54:46,660 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 127 flow [2024-11-17 07:54:46,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:46,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:46,661 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:46,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 07:54:46,661 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:46,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:46,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2076198141, now seen corresponding path program 1 times [2024-11-17 07:54:46,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:46,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565217536] [2024-11-17 07:54:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:46,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:46,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:46,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565217536] [2024-11-17 07:54:46,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565217536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:54:46,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091534434] [2024-11-17 07:54:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:46,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:46,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:46,799 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) [2024-11-17 07:54:46,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 07:54:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:46,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 07:54:46,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:54:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:46,914 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 07:54:46,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091534434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:46,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 07:54:46,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-17 07:54:46,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806589330] [2024-11-17 07:54:46,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:46,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 07:54:46,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:46,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 07:54:46,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-17 07:54:46,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-17 07:54:46,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:46,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:46,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-17 07:54:46,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:47,063 INFO L124 PetriNetUnfolderBase]: 366/668 cut-off events. [2024-11-17 07:54:47,063 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-17 07:54:47,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1269 conditions, 668 events. 366/668 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3439 event pairs, 277 based on Foata normal form. 1/490 useless extension candidates. Maximal degree in co-relation 1240. Up to 565 conditions per place. [2024-11-17 07:54:47,067 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 28 selfloop transitions, 7 changer transitions 0/49 dead transitions. [2024-11-17 07:54:47,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 193 flow [2024-11-17 07:54:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 07:54:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 07:54:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-11-17 07:54:47,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-11-17 07:54:47,069 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 127 flow. Second operand 6 states and 132 transitions. [2024-11-17 07:54:47,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 193 flow [2024-11-17 07:54:47,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 07:54:47,070 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 134 flow [2024-11-17 07:54:47,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-17 07:54:47,071 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-11-17 07:54:47,073 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 134 flow [2024-11-17 07:54:47,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:47,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:47,074 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:47,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 07:54:47,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:47,275 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:47,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash -62366746, now seen corresponding path program 1 times [2024-11-17 07:54:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:47,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406361853] [2024-11-17 07:54:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:47,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:47,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:47,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406361853] [2024-11-17 07:54:47,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406361853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:54:47,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522128158] [2024-11-17 07:54:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:47,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:47,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:47,363 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) [2024-11-17 07:54:47,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 07:54:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:47,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 07:54:47,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:54:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:47,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:54:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:47,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522128158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:54:47,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:54:47,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-17 07:54:47,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242032201] [2024-11-17 07:54:47,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:54:47,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 07:54:47,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:47,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 07:54:47,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-17 07:54:47,504 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-17 07:54:47,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 134 flow. Second operand has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:47,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:47,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-17 07:54:47,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:47,691 INFO L124 PetriNetUnfolderBase]: 369/686 cut-off events. [2024-11-17 07:54:47,691 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-11-17 07:54:47,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1319 conditions, 686 events. 369/686 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3589 event pairs, 277 based on Foata normal form. 3/511 useless extension candidates. Maximal degree in co-relation 1241. Up to 572 conditions per place. [2024-11-17 07:54:47,693 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 31 selfloop transitions, 13 changer transitions 0/58 dead transitions. [2024-11-17 07:54:47,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 276 flow [2024-11-17 07:54:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 07:54:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 07:54:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-11-17 07:54:47,697 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-11-17 07:54:47,697 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 134 flow. Second operand 10 states and 207 transitions. [2024-11-17 07:54:47,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 276 flow [2024-11-17 07:54:47,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 58 transitions, 246 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-17 07:54:47,701 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 202 flow [2024-11-17 07:54:47,701 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=202, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-11-17 07:54:47,701 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-11-17 07:54:47,702 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 202 flow [2024-11-17 07:54:47,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:47,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:47,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:47,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 07:54:47,906 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,SelfDestructingSolverStorable2 [2024-11-17 07:54:47,907 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:47,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:47,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2030474985, now seen corresponding path program 1 times [2024-11-17 07:54:47,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:47,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196531728] [2024-11-17 07:54:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:47,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:47,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:47,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196531728] [2024-11-17 07:54:47,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196531728] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:47,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:54:47,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 07:54:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886004180] [2024-11-17 07:54:47,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:47,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 07:54:47,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:47,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 07:54:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 07:54:47,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-11-17 07:54:47,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:47,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:47,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-11-17 07:54:47,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:48,026 INFO L124 PetriNetUnfolderBase]: 449/830 cut-off events. [2024-11-17 07:54:48,026 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-11-17 07:54:48,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1643 conditions, 830 events. 449/830 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3957 event pairs, 198 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 1605. Up to 496 conditions per place. [2024-11-17 07:54:48,030 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 52 selfloop transitions, 6 changer transitions 2/74 dead transitions. [2024-11-17 07:54:48,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 74 transitions, 355 flow [2024-11-17 07:54:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 07:54:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 07:54:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-11-17 07:54:48,033 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6172839506172839 [2024-11-17 07:54:48,033 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 202 flow. Second operand 3 states and 100 transitions. [2024-11-17 07:54:48,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 74 transitions, 355 flow [2024-11-17 07:54:48,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 344 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-17 07:54:48,037 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 229 flow [2024-11-17 07:54:48,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-11-17 07:54:48,038 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-11-17 07:54:48,039 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 229 flow [2024-11-17 07:54:48,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:48,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:48,039 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:48,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 07:54:48,039 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:48,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:48,040 INFO L85 PathProgramCache]: Analyzing trace with hash -634120355, now seen corresponding path program 1 times [2024-11-17 07:54:48,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:48,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155438480] [2024-11-17 07:54:48,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:48,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:48,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:48,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155438480] [2024-11-17 07:54:48,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155438480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:48,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:54:48,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 07:54:48,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633523255] [2024-11-17 07:54:48,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:48,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 07:54:48,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:48,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 07:54:48,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 07:54:48,087 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 54 [2024-11-17 07:54:48,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:48,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:48,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 54 [2024-11-17 07:54:48,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:48,160 INFO L124 PetriNetUnfolderBase]: 359/682 cut-off events. [2024-11-17 07:54:48,160 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-11-17 07:54:48,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1476 conditions, 682 events. 359/682 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3373 event pairs, 112 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 1437. Up to 532 conditions per place. [2024-11-17 07:54:48,165 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 45 selfloop transitions, 3 changer transitions 2/66 dead transitions. [2024-11-17 07:54:48,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 340 flow [2024-11-17 07:54:48,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 07:54:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 07:54:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-11-17 07:54:48,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5679012345679012 [2024-11-17 07:54:48,168 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 229 flow. Second operand 3 states and 92 transitions. [2024-11-17 07:54:48,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 340 flow [2024-11-17 07:54:48,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 07:54:48,170 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 226 flow [2024-11-17 07:54:48,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-11-17 07:54:48,172 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2024-11-17 07:54:48,172 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 226 flow [2024-11-17 07:54:48,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:48,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:48,173 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:48,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 07:54:48,173 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:48,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash -634120354, now seen corresponding path program 1 times [2024-11-17 07:54:48,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:48,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587662973] [2024-11-17 07:54:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:48,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:48,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587662973] [2024-11-17 07:54:48,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587662973] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:48,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:54:48,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 07:54:48,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545215803] [2024-11-17 07:54:48,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:48,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:54:48,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:48,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:54:48,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:54:48,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-11-17 07:54:48,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:48,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:48,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-11-17 07:54:48,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:48,393 INFO L124 PetriNetUnfolderBase]: 380/758 cut-off events. [2024-11-17 07:54:48,393 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2024-11-17 07:54:48,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1617 conditions, 758 events. 380/758 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3816 event pairs, 275 based on Foata normal form. 5/672 useless extension candidates. Maximal degree in co-relation 1577. Up to 600 conditions per place. [2024-11-17 07:54:48,397 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 41 selfloop transitions, 3 changer transitions 12/71 dead transitions. [2024-11-17 07:54:48,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 71 transitions, 364 flow [2024-11-17 07:54:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 07:54:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 07:54:48,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-11-17 07:54:48,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-11-17 07:54:48,399 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 226 flow. Second operand 5 states and 130 transitions. [2024-11-17 07:54:48,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 71 transitions, 364 flow [2024-11-17 07:54:48,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 07:54:48,404 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 233 flow [2024-11-17 07:54:48,404 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2024-11-17 07:54:48,405 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-11-17 07:54:48,405 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 233 flow [2024-11-17 07:54:48,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:48,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:48,405 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:48,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 07:54:48,406 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:48,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1078312990, now seen corresponding path program 1 times [2024-11-17 07:54:48,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:48,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885572525] [2024-11-17 07:54:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:48,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:48,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:48,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885572525] [2024-11-17 07:54:48,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885572525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:54:48,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156083753] [2024-11-17 07:54:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:48,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:48,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:48,495 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) [2024-11-17 07:54:48,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 07:54:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:48,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 07:54:48,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:54:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 07:54:48,597 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 07:54:48,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156083753] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:48,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 07:54:48,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-17 07:54:48,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846381435] [2024-11-17 07:54:48,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:48,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:54:48,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:48,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:54:48,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-17 07:54:48,604 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 54 [2024-11-17 07:54:48,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 233 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2024-11-17 07:54:48,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:48,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 54 [2024-11-17 07:54:48,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:48,690 INFO L124 PetriNetUnfolderBase]: 293/593 cut-off events. [2024-11-17 07:54:48,691 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2024-11-17 07:54:48,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1282 conditions, 593 events. 293/593 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2825 event pairs, 122 based on Foata normal form. 44/560 useless extension candidates. Maximal degree in co-relation 1240. Up to 325 conditions per place. [2024-11-17 07:54:48,694 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 39 selfloop transitions, 8 changer transitions 2/65 dead transitions. [2024-11-17 07:54:48,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 65 transitions, 346 flow [2024-11-17 07:54:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 07:54:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 07:54:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-11-17 07:54:48,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-11-17 07:54:48,695 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 233 flow. Second operand 4 states and 109 transitions. [2024-11-17 07:54:48,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 65 transitions, 346 flow [2024-11-17 07:54:48,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 336 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-17 07:54:48,698 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 235 flow [2024-11-17 07:54:48,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-11-17 07:54:48,699 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-11-17 07:54:48,700 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 235 flow [2024-11-17 07:54:48,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2024-11-17 07:54:48,700 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:48,700 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:48,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 07:54:48,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:48,905 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:48,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:48,906 INFO L85 PathProgramCache]: Analyzing trace with hash 733076996, now seen corresponding path program 1 times [2024-11-17 07:54:48,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:48,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266570625] [2024-11-17 07:54:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 07:54:48,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:48,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266570625] [2024-11-17 07:54:48,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266570625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:48,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:54:48,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 07:54:48,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905527709] [2024-11-17 07:54:48,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:48,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 07:54:48,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:48,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 07:54:48,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 07:54:48,948 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 54 [2024-11-17 07:54:48,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 235 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2024-11-17 07:54:48,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:48,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 54 [2024-11-17 07:54:48,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:49,033 INFO L124 PetriNetUnfolderBase]: 330/728 cut-off events. [2024-11-17 07:54:49,033 INFO L125 PetriNetUnfolderBase]: For 297/297 co-relation queries the response was YES. [2024-11-17 07:54:49,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 728 events. 330/728 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3464 event pairs, 124 based on Foata normal form. 0/659 useless extension candidates. Maximal degree in co-relation 1574. Up to 317 conditions per place. [2024-11-17 07:54:49,036 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 49 selfloop transitions, 3 changer transitions 2/70 dead transitions. [2024-11-17 07:54:49,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 392 flow [2024-11-17 07:54:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 07:54:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 07:54:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-11-17 07:54:49,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-11-17 07:54:49,037 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 235 flow. Second operand 3 states and 93 transitions. [2024-11-17 07:54:49,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 392 flow [2024-11-17 07:54:49,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 70 transitions, 366 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 07:54:49,039 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 232 flow [2024-11-17 07:54:49,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-11-17 07:54:49,039 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2024-11-17 07:54:49,039 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 232 flow [2024-11-17 07:54:49,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2024-11-17 07:54:49,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:49,040 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:49,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 07:54:49,040 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:49,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:49,040 INFO L85 PathProgramCache]: Analyzing trace with hash 733076997, now seen corresponding path program 1 times [2024-11-17 07:54:49,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:49,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733876888] [2024-11-17 07:54:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:49,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:49,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:49,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733876888] [2024-11-17 07:54:49,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733876888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:54:49,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907252499] [2024-11-17 07:54:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:49,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:49,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:49,155 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) [2024-11-17 07:54:49,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 07:54:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:49,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 07:54:49,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:54:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 07:54:49,277 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 07:54:49,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907252499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:49,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 07:54:49,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-11-17 07:54:49,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466332823] [2024-11-17 07:54:49,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:49,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 07:54:49,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:49,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 07:54:49,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-17 07:54:49,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 54 [2024-11-17 07:54:49,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:49,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:49,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 54 [2024-11-17 07:54:49,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:49,411 INFO L124 PetriNetUnfolderBase]: 391/847 cut-off events. [2024-11-17 07:54:49,411 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-11-17 07:54:49,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1807 conditions, 847 events. 391/847 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4118 event pairs, 68 based on Foata normal form. 0/773 useless extension candidates. Maximal degree in co-relation 1765. Up to 254 conditions per place. [2024-11-17 07:54:49,414 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 63 selfloop transitions, 11 changer transitions 6/96 dead transitions. [2024-11-17 07:54:49,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 96 transitions, 494 flow [2024-11-17 07:54:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 07:54:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 07:54:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-11-17 07:54:49,415 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5401234567901234 [2024-11-17 07:54:49,415 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 232 flow. Second operand 6 states and 175 transitions. [2024-11-17 07:54:49,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 96 transitions, 494 flow [2024-11-17 07:54:49,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 96 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 07:54:49,417 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 284 flow [2024-11-17 07:54:49,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-11-17 07:54:49,418 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2024-11-17 07:54:49,418 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 284 flow [2024-11-17 07:54:49,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:49,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:49,418 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:49,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 07:54:49,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:49,619 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:49,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:49,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1232950874, now seen corresponding path program 2 times [2024-11-17 07:54:49,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:49,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339594318] [2024-11-17 07:54:49,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:49,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:49,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:49,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339594318] [2024-11-17 07:54:49,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339594318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:54:49,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101221302] [2024-11-17 07:54:49,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 07:54:49,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:49,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:49,720 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) [2024-11-17 07:54:49,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 07:54:49,778 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 07:54:49,778 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 07:54:49,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 07:54:49,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:54:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-17 07:54:49,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:54:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-17 07:54:49,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101221302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:54:49,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:54:49,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 13 [2024-11-17 07:54:49,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910205301] [2024-11-17 07:54:49,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:54:49,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 07:54:49,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 07:54:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-17 07:54:49,860 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-11-17 07:54:49,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 284 flow. Second operand has 14 states, 14 states have (on average 16.357142857142858) internal successors, (229), 14 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:49,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:49,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-11-17 07:54:49,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:50,063 INFO L124 PetriNetUnfolderBase]: 391/813 cut-off events. [2024-11-17 07:54:50,064 INFO L125 PetriNetUnfolderBase]: For 475/475 co-relation queries the response was YES. [2024-11-17 07:54:50,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1980 conditions, 813 events. 391/813 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3839 event pairs, 282 based on Foata normal form. 2/754 useless extension candidates. Maximal degree in co-relation 1921. Up to 671 conditions per place. [2024-11-17 07:54:50,066 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 35 selfloop transitions, 18 changer transitions 0/67 dead transitions. [2024-11-17 07:54:50,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 67 transitions, 415 flow [2024-11-17 07:54:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 07:54:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 07:54:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 257 transitions. [2024-11-17 07:54:50,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33994708994708994 [2024-11-17 07:54:50,068 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 284 flow. Second operand 14 states and 257 transitions. [2024-11-17 07:54:50,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 67 transitions, 415 flow [2024-11-17 07:54:50,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 67 transitions, 400 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-17 07:54:50,070 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 314 flow [2024-11-17 07:54:50,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=314, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-11-17 07:54:50,070 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2024-11-17 07:54:50,070 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 314 flow [2024-11-17 07:54:50,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.357142857142858) internal successors, (229), 14 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:50,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:50,071 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:50,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 07:54:50,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-17 07:54:50,277 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:50,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:50,278 INFO L85 PathProgramCache]: Analyzing trace with hash 112371368, now seen corresponding path program 1 times [2024-11-17 07:54:50,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:50,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233275740] [2024-11-17 07:54:50,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:50,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 07:54:50,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:50,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233275740] [2024-11-17 07:54:50,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233275740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:50,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:54:50,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 07:54:50,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245822745] [2024-11-17 07:54:50,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:50,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 07:54:50,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 07:54:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 07:54:50,319 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-11-17 07:54:50,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:50,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:50,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-11-17 07:54:50,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:50,396 INFO L124 PetriNetUnfolderBase]: 466/908 cut-off events. [2024-11-17 07:54:50,396 INFO L125 PetriNetUnfolderBase]: For 529/529 co-relation queries the response was YES. [2024-11-17 07:54:50,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2251 conditions, 908 events. 466/908 cut-off events. For 529/529 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4384 event pairs, 259 based on Foata normal form. 0/867 useless extension candidates. Maximal degree in co-relation 2119. Up to 713 conditions per place. [2024-11-17 07:54:50,400 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 56 selfloop transitions, 2 changer transitions 6/78 dead transitions. [2024-11-17 07:54:50,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 78 transitions, 496 flow [2024-11-17 07:54:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 07:54:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 07:54:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-11-17 07:54:50,401 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-11-17 07:54:50,401 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 314 flow. Second operand 3 states and 93 transitions. [2024-11-17 07:54:50,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 78 transitions, 496 flow [2024-11-17 07:54:50,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 428 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-11-17 07:54:50,403 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 254 flow [2024-11-17 07:54:50,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-11-17 07:54:50,403 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-11-17 07:54:50,404 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 254 flow [2024-11-17 07:54:50,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:50,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:50,404 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:50,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 07:54:50,404 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:50,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash -79228828, now seen corresponding path program 1 times [2024-11-17 07:54:50,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:50,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331635392] [2024-11-17 07:54:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:50,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:50,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:50,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331635392] [2024-11-17 07:54:50,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331635392] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:54:50,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131259120] [2024-11-17 07:54:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:50,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:50,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:50,815 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:54:50,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 07:54:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:50,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-17 07:54:50,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:54:50,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-17 07:54:51,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-17 07:54:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:51,306 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:54:51,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2024-11-17 07:54:51,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2024-11-17 07:54:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131259120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:54:51,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:54:51,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 28 [2024-11-17 07:54:51,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832626696] [2024-11-17 07:54:51,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:54:51,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-17 07:54:51,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:51,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-17 07:54:51,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2024-11-17 07:54:51,935 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-11-17 07:54:51,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 254 flow. Second operand has 30 states, 30 states have (on average 13.833333333333334) internal successors, (415), 30 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:51,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:51,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-11-17 07:54:51,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:53,515 INFO L124 PetriNetUnfolderBase]: 1278/2598 cut-off events. [2024-11-17 07:54:53,515 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2024-11-17 07:54:53,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6199 conditions, 2598 events. 1278/2598 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16768 event pairs, 257 based on Foata normal form. 6/2499 useless extension candidates. Maximal degree in co-relation 5468. Up to 439 conditions per place. [2024-11-17 07:54:53,526 INFO L140 encePairwiseOnDemand]: 36/54 looper letters, 170 selfloop transitions, 48 changer transitions 17/247 dead transitions. [2024-11-17 07:54:53,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 247 transitions, 1329 flow [2024-11-17 07:54:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-17 07:54:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-17 07:54:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 572 transitions. [2024-11-17 07:54:53,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3652618135376756 [2024-11-17 07:54:53,528 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 254 flow. Second operand 29 states and 572 transitions. [2024-11-17 07:54:53,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 247 transitions, 1329 flow [2024-11-17 07:54:53,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 247 transitions, 1325 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 07:54:53,533 INFO L231 Difference]: Finished difference. Result has 109 places, 90 transitions, 570 flow [2024-11-17 07:54:53,533 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=570, PETRI_PLACES=109, PETRI_TRANSITIONS=90} [2024-11-17 07:54:53,534 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 59 predicate places. [2024-11-17 07:54:53,534 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 90 transitions, 570 flow [2024-11-17 07:54:53,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.833333333333334) internal successors, (415), 30 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:53,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:53,534 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:53,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 07:54:53,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:53,739 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:53,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:53,739 INFO L85 PathProgramCache]: Analyzing trace with hash -998290276, now seen corresponding path program 1 times [2024-11-17 07:54:53,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:53,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350877615] [2024-11-17 07:54:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:53,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 07:54:53,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:53,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350877615] [2024-11-17 07:54:53,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350877615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:53,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:54:53,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 07:54:53,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188314099] [2024-11-17 07:54:53,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:53,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:54:53,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:53,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:54:53,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:54:53,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-11-17 07:54:53,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 90 transitions, 570 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:53,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:53,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-11-17 07:54:53,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:54,111 INFO L124 PetriNetUnfolderBase]: 2005/3978 cut-off events. [2024-11-17 07:54:54,111 INFO L125 PetriNetUnfolderBase]: For 6639/6699 co-relation queries the response was YES. [2024-11-17 07:54:54,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12030 conditions, 3978 events. 2005/3978 cut-off events. For 6639/6699 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 26015 event pairs, 647 based on Foata normal form. 32/3988 useless extension candidates. Maximal degree in co-relation 11001. Up to 1312 conditions per place. [2024-11-17 07:54:54,129 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 96 selfloop transitions, 25 changer transitions 6/145 dead transitions. [2024-11-17 07:54:54,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 145 transitions, 1191 flow [2024-11-17 07:54:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 07:54:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 07:54:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-11-17 07:54:54,130 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2024-11-17 07:54:54,130 INFO L175 Difference]: Start difference. First operand has 109 places, 90 transitions, 570 flow. Second operand 4 states and 125 transitions. [2024-11-17 07:54:54,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 145 transitions, 1191 flow [2024-11-17 07:54:54,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 145 transitions, 1113 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-11-17 07:54:54,149 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 804 flow [2024-11-17 07:54:54,149 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=804, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2024-11-17 07:54:54,149 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 57 predicate places. [2024-11-17 07:54:54,149 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 804 flow [2024-11-17 07:54:54,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:54,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:54,150 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:54,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-17 07:54:54,150 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:54,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:54,150 INFO L85 PathProgramCache]: Analyzing trace with hash 852203887, now seen corresponding path program 1 times [2024-11-17 07:54:54,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:54,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786889673] [2024-11-17 07:54:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:54,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:54,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:54,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786889673] [2024-11-17 07:54:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786889673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:54:54,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077405215] [2024-11-17 07:54:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:54,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:54,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:54:54,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 07:54:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:54,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 07:54:54,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:54:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 07:54:55,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:54:55,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 07:54:55,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-17 07:54:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 07:54:55,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077405215] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 07:54:55,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 07:54:55,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13, 6] total 23 [2024-11-17 07:54:55,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533527891] [2024-11-17 07:54:55,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:55,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 07:54:55,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:55,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 07:54:55,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2024-11-17 07:54:55,146 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-17 07:54:55,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 804 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:55,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:55,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-17 07:54:55,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:55,559 INFO L124 PetriNetUnfolderBase]: 1939/3932 cut-off events. [2024-11-17 07:54:55,559 INFO L125 PetriNetUnfolderBase]: For 8929/8973 co-relation queries the response was YES. [2024-11-17 07:54:55,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12839 conditions, 3932 events. 1939/3932 cut-off events. For 8929/8973 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 26496 event pairs, 365 based on Foata normal form. 62/3972 useless extension candidates. Maximal degree in co-relation 11598. Up to 1665 conditions per place. [2024-11-17 07:54:55,580 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 116 selfloop transitions, 18 changer transitions 4/157 dead transitions. [2024-11-17 07:54:55,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 157 transitions, 1409 flow [2024-11-17 07:54:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 07:54:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 07:54:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-11-17 07:54:55,581 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-11-17 07:54:55,581 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 804 flow. Second operand 7 states and 182 transitions. [2024-11-17 07:54:55,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 157 transitions, 1409 flow [2024-11-17 07:54:55,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 157 transitions, 1397 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-17 07:54:55,598 INFO L231 Difference]: Finished difference. Result has 116 places, 111 transitions, 875 flow [2024-11-17 07:54:55,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=875, PETRI_PLACES=116, PETRI_TRANSITIONS=111} [2024-11-17 07:54:55,599 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 66 predicate places. [2024-11-17 07:54:55,599 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 111 transitions, 875 flow [2024-11-17 07:54:55,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:55,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:55,600 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:55,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-17 07:54:55,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:55,800 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:55,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash -597698170, now seen corresponding path program 2 times [2024-11-17 07:54:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:55,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526106710] [2024-11-17 07:54:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:55,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:56,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:56,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526106710] [2024-11-17 07:54:56,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526106710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:54:56,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683726587] [2024-11-17 07:54:56,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 07:54:56,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:56,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:56,640 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:54:56,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 07:54:56,693 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 07:54:56,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 07:54:56,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 07:54:56,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:54:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-17 07:54:56,815 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 07:54:56,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683726587] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:54:56,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 07:54:56,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 19 [2024-11-17 07:54:56,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063427742] [2024-11-17 07:54:56,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:54:56,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 07:54:56,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 07:54:56,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-11-17 07:54:56,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-11-17 07:54:56,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 111 transitions, 875 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:56,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:56,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-11-17 07:54:56,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:57,312 INFO L124 PetriNetUnfolderBase]: 1746/3667 cut-off events. [2024-11-17 07:54:57,312 INFO L125 PetriNetUnfolderBase]: For 10466/10546 co-relation queries the response was YES. [2024-11-17 07:54:57,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12931 conditions, 3667 events. 1746/3667 cut-off events. For 10466/10546 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 24155 event pairs, 148 based on Foata normal form. 74/3721 useless extension candidates. Maximal degree in co-relation 11063. Up to 777 conditions per place. [2024-11-17 07:54:57,339 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 134 selfloop transitions, 22 changer transitions 2/178 dead transitions. [2024-11-17 07:54:57,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 178 transitions, 1671 flow [2024-11-17 07:54:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 07:54:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 07:54:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-11-17 07:54:57,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-11-17 07:54:57,341 INFO L175 Difference]: Start difference. First operand has 116 places, 111 transitions, 875 flow. Second operand 8 states and 220 transitions. [2024-11-17 07:54:57,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 178 transitions, 1671 flow [2024-11-17 07:54:57,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 178 transitions, 1624 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-17 07:54:57,364 INFO L231 Difference]: Finished difference. Result has 121 places, 112 transitions, 913 flow [2024-11-17 07:54:57,364 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=913, PETRI_PLACES=121, PETRI_TRANSITIONS=112} [2024-11-17 07:54:57,364 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-11-17 07:54:57,365 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 112 transitions, 913 flow [2024-11-17 07:54:57,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:57,365 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:57,365 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:57,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-17 07:54:57,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-17 07:54:57,566 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:57,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:57,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1585378949, now seen corresponding path program 1 times [2024-11-17 07:54:57,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:57,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637883843] [2024-11-17 07:54:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:57,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:57,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:57,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637883843] [2024-11-17 07:54:57,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637883843] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:54:57,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811582299] [2024-11-17 07:54:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:57,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:57,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:57,690 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:54:57,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 07:54:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:57,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 07:54:57,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:54:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:57,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:54:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:57,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811582299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:54:57,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:54:57,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-17 07:54:57,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996378626] [2024-11-17 07:54:57,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:54:57,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 07:54:57,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:57,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 07:54:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-17 07:54:58,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-11-17 07:54:58,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 112 transitions, 913 flow. Second operand has 20 states, 20 states have (on average 16.8) internal successors, (336), 20 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:58,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:58,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-11-17 07:54:58,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:58,445 INFO L124 PetriNetUnfolderBase]: 1226/2637 cut-off events. [2024-11-17 07:54:58,445 INFO L125 PetriNetUnfolderBase]: For 8709/8721 co-relation queries the response was YES. [2024-11-17 07:54:58,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9136 conditions, 2637 events. 1226/2637 cut-off events. For 8709/8721 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 15763 event pairs, 434 based on Foata normal form. 21/2643 useless extension candidates. Maximal degree in co-relation 8946. Up to 972 conditions per place. [2024-11-17 07:54:58,459 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 57 selfloop transitions, 24 changer transitions 29/125 dead transitions. [2024-11-17 07:54:58,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 125 transitions, 1031 flow [2024-11-17 07:54:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 07:54:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 07:54:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 272 transitions. [2024-11-17 07:54:58,461 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-11-17 07:54:58,461 INFO L175 Difference]: Start difference. First operand has 121 places, 112 transitions, 913 flow. Second operand 14 states and 272 transitions. [2024-11-17 07:54:58,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 125 transitions, 1031 flow [2024-11-17 07:54:58,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 125 transitions, 946 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-11-17 07:54:58,473 INFO L231 Difference]: Finished difference. Result has 121 places, 82 transitions, 583 flow [2024-11-17 07:54:58,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=583, PETRI_PLACES=121, PETRI_TRANSITIONS=82} [2024-11-17 07:54:58,473 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-11-17 07:54:58,473 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 82 transitions, 583 flow [2024-11-17 07:54:58,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.8) internal successors, (336), 20 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:58,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:58,474 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:58,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-17 07:54:58,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-17 07:54:58,674 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:54:58,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:54:58,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1536900563, now seen corresponding path program 2 times [2024-11-17 07:54:58,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:54:58,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507223655] [2024-11-17 07:54:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:54:58,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:54:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:54:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:54:58,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:54:58,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507223655] [2024-11-17 07:54:58,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507223655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:54:58,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250597426] [2024-11-17 07:54:58,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 07:54:58,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:54:58,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:54:58,836 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:54:58,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 07:54:58,896 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 07:54:58,897 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 07:54:58,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 07:54:58,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:54:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-17 07:54:58,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:54:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-17 07:54:58,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250597426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:54:58,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:54:58,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2024-11-17 07:54:58,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885756673] [2024-11-17 07:54:58,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:54:58,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 07:54:58,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:54:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 07:54:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-17 07:54:59,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-11-17 07:54:59,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 82 transitions, 583 flow. Second operand has 15 states, 15 states have (on average 17.2) internal successors, (258), 15 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:59,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:54:59,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-11-17 07:54:59,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:54:59,858 INFO L124 PetriNetUnfolderBase]: 2324/5049 cut-off events. [2024-11-17 07:54:59,859 INFO L125 PetriNetUnfolderBase]: For 16014/16056 co-relation queries the response was YES. [2024-11-17 07:54:59,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17172 conditions, 5049 events. 2324/5049 cut-off events. For 16014/16056 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 36163 event pairs, 178 based on Foata normal form. 190/5213 useless extension candidates. Maximal degree in co-relation 16066. Up to 881 conditions per place. [2024-11-17 07:54:59,881 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 180 selfloop transitions, 52 changer transitions 13/260 dead transitions. [2024-11-17 07:54:59,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 260 transitions, 2118 flow [2024-11-17 07:54:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-17 07:54:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-17 07:54:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 522 transitions. [2024-11-17 07:54:59,885 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-11-17 07:54:59,885 INFO L175 Difference]: Start difference. First operand has 121 places, 82 transitions, 583 flow. Second operand 24 states and 522 transitions. [2024-11-17 07:54:59,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 260 transitions, 2118 flow [2024-11-17 07:54:59,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 260 transitions, 1881 flow, removed 51 selfloop flow, removed 19 redundant places. [2024-11-17 07:54:59,925 INFO L231 Difference]: Finished difference. Result has 120 places, 111 transitions, 941 flow [2024-11-17 07:54:59,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=941, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2024-11-17 07:54:59,926 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 70 predicate places. [2024-11-17 07:54:59,926 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 941 flow [2024-11-17 07:54:59,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.2) internal successors, (258), 15 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:54:59,926 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:54:59,927 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:54:59,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-17 07:55:00,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-17 07:55:00,132 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:55:00,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:55:00,133 INFO L85 PathProgramCache]: Analyzing trace with hash 400098132, now seen corresponding path program 1 times [2024-11-17 07:55:00,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:55:00,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388701451] [2024-11-17 07:55:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:00,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:55:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 07:55:00,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:55:00,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388701451] [2024-11-17 07:55:00,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388701451] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 07:55:00,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 07:55:00,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 07:55:00,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933435595] [2024-11-17 07:55:00,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 07:55:00,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 07:55:00,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:55:00,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 07:55:00,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 07:55:00,218 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-11-17 07:55:00,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 941 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:00,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:55:00,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-11-17 07:55:00,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:55:00,825 INFO L124 PetriNetUnfolderBase]: 3193/6627 cut-off events. [2024-11-17 07:55:00,825 INFO L125 PetriNetUnfolderBase]: For 25774/25896 co-relation queries the response was YES. [2024-11-17 07:55:00,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22843 conditions, 6627 events. 3193/6627 cut-off events. For 25774/25896 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 49341 event pairs, 700 based on Foata normal form. 294/6897 useless extension candidates. Maximal degree in co-relation 17984. Up to 2724 conditions per place. [2024-11-17 07:55:00,859 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 129 selfloop transitions, 4 changer transitions 4/155 dead transitions. [2024-11-17 07:55:00,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 155 transitions, 1670 flow [2024-11-17 07:55:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 07:55:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 07:55:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-11-17 07:55:00,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-17 07:55:00,860 INFO L175 Difference]: Start difference. First operand has 120 places, 111 transitions, 941 flow. Second operand 4 states and 108 transitions. [2024-11-17 07:55:00,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 155 transitions, 1670 flow [2024-11-17 07:55:00,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 155 transitions, 1578 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-11-17 07:55:00,883 INFO L231 Difference]: Finished difference. Result has 117 places, 110 transitions, 895 flow [2024-11-17 07:55:00,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=895, PETRI_PLACES=117, PETRI_TRANSITIONS=110} [2024-11-17 07:55:00,884 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 67 predicate places. [2024-11-17 07:55:00,884 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 110 transitions, 895 flow [2024-11-17 07:55:00,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:00,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:55:00,884 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:55:00,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-17 07:55:00,884 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:55:00,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:55:00,885 INFO L85 PathProgramCache]: Analyzing trace with hash -806396906, now seen corresponding path program 1 times [2024-11-17 07:55:00,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:55:00,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510979752] [2024-11-17 07:55:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:00,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:55:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:01,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:55:01,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510979752] [2024-11-17 07:55:01,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510979752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:55:01,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702614856] [2024-11-17 07:55:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:01,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:01,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:55:01,572 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:55:01,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 07:55:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:01,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-17 07:55:01,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:55:01,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-17 07:55:02,412 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-17 07:55:02,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2024-11-17 07:55:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:02,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:55:02,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2024-11-17 07:55:03,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 07:55:03,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 99 [2024-11-17 07:55:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:03,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702614856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:55:03,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:55:03,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 49 [2024-11-17 07:55:03,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838413087] [2024-11-17 07:55:03,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:55:03,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-17 07:55:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:55:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-17 07:55:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2267, Unknown=0, NotChecked=0, Total=2550 [2024-11-17 07:55:03,745 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-11-17 07:55:03,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 110 transitions, 895 flow. Second operand has 51 states, 51 states have (on average 12.705882352941176) internal successors, (648), 51 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:03,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:55:03,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-11-17 07:55:03,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:55:16,366 INFO L124 PetriNetUnfolderBase]: 11225/20812 cut-off events. [2024-11-17 07:55:16,367 INFO L125 PetriNetUnfolderBase]: For 74675/74675 co-relation queries the response was YES. [2024-11-17 07:55:16,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74062 conditions, 20812 events. 11225/20812 cut-off events. For 74675/74675 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 158679 event pairs, 848 based on Foata normal form. 982/21720 useless extension candidates. Maximal degree in co-relation 58276. Up to 3786 conditions per place. [2024-11-17 07:55:16,484 INFO L140 encePairwiseOnDemand]: 34/54 looper letters, 700 selfloop transitions, 477 changer transitions 119/1307 dead transitions. [2024-11-17 07:55:16,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 1307 transitions, 11350 flow [2024-11-17 07:55:16,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2024-11-17 07:55:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2024-11-17 07:55:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 2641 transitions. [2024-11-17 07:55:16,489 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33963477366255146 [2024-11-17 07:55:16,490 INFO L175 Difference]: Start difference. First operand has 117 places, 110 transitions, 895 flow. Second operand 144 states and 2641 transitions. [2024-11-17 07:55:16,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 1307 transitions, 11350 flow [2024-11-17 07:55:16,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 1307 transitions, 11163 flow, removed 92 selfloop flow, removed 1 redundant places. [2024-11-17 07:55:16,577 INFO L231 Difference]: Finished difference. Result has 341 places, 580 transitions, 7529 flow [2024-11-17 07:55:16,577 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=144, PETRI_FLOW=7529, PETRI_PLACES=341, PETRI_TRANSITIONS=580} [2024-11-17 07:55:16,578 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 291 predicate places. [2024-11-17 07:55:16,578 INFO L471 AbstractCegarLoop]: Abstraction has has 341 places, 580 transitions, 7529 flow [2024-11-17 07:55:16,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 12.705882352941176) internal successors, (648), 51 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:16,579 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:55:16,579 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:55:16,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 07:55:16,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:16,783 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:55:16,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:55:16,783 INFO L85 PathProgramCache]: Analyzing trace with hash -47667921, now seen corresponding path program 1 times [2024-11-17 07:55:16,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:55:16,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457999518] [2024-11-17 07:55:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:16,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:55:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:17,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:55:17,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457999518] [2024-11-17 07:55:17,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457999518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:55:17,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843643076] [2024-11-17 07:55:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:17,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:17,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:55:17,372 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:55:17,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 07:55:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:17,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 07:55:17,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:55:17,783 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 07:55:17,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-17 07:55:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:17,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:55:17,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 07:55:17,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-11-17 07:55:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:18,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843643076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:55:18,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:55:18,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2024-11-17 07:55:18,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088932997] [2024-11-17 07:55:18,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:55:18,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-17 07:55:18,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:55:18,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-17 07:55:18,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1693, Unknown=0, NotChecked=0, Total=1892 [2024-11-17 07:55:18,717 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-11-17 07:55:18,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 580 transitions, 7529 flow. Second operand has 44 states, 44 states have (on average 13.818181818181818) internal successors, (608), 44 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:18,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:55:18,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-11-17 07:55:18,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:55:21,672 INFO L124 PetriNetUnfolderBase]: 3242/7001 cut-off events. [2024-11-17 07:55:21,672 INFO L125 PetriNetUnfolderBase]: For 194131/194291 co-relation queries the response was YES. [2024-11-17 07:55:21,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41017 conditions, 7001 events. 3242/7001 cut-off events. For 194131/194291 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 53204 event pairs, 168 based on Foata normal form. 188/7181 useless extension candidates. Maximal degree in co-relation 40907. Up to 1629 conditions per place. [2024-11-17 07:55:21,742 INFO L140 encePairwiseOnDemand]: 37/54 looper letters, 273 selfloop transitions, 154 changer transitions 5/450 dead transitions. [2024-11-17 07:55:21,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 450 transitions, 6461 flow [2024-11-17 07:55:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-17 07:55:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-17 07:55:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 596 transitions. [2024-11-17 07:55:21,745 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3344556677890011 [2024-11-17 07:55:21,745 INFO L175 Difference]: Start difference. First operand has 341 places, 580 transitions, 7529 flow. Second operand 33 states and 596 transitions. [2024-11-17 07:55:21,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 450 transitions, 6461 flow [2024-11-17 07:55:22,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 450 transitions, 5120 flow, removed 559 selfloop flow, removed 63 redundant places. [2024-11-17 07:55:22,021 INFO L231 Difference]: Finished difference. Result has 260 places, 310 transitions, 3628 flow [2024-11-17 07:55:22,021 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3628, PETRI_PLACES=260, PETRI_TRANSITIONS=310} [2024-11-17 07:55:22,022 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 210 predicate places. [2024-11-17 07:55:22,022 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 310 transitions, 3628 flow [2024-11-17 07:55:22,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 13.818181818181818) internal successors, (608), 44 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:22,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:55:22,023 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:55:22,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 07:55:22,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:22,223 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:55:22,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:55:22,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1780087191, now seen corresponding path program 2 times [2024-11-17 07:55:22,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:55:22,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911198429] [2024-11-17 07:55:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:22,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:55:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:22,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:55:22,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911198429] [2024-11-17 07:55:22,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911198429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:55:22,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38247975] [2024-11-17 07:55:22,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 07:55:22,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:22,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:55:22,810 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:55:22,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 07:55:22,874 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 07:55:22,874 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 07:55:22,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-17 07:55:22,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:55:22,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-17 07:55:23,228 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 07:55:23,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-17 07:55:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:23,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:55:23,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2024-11-17 07:55:23,939 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-17 07:55:23,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2024-11-17 07:55:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:24,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38247975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:55:24,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:55:24,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 43 [2024-11-17 07:55:24,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159568529] [2024-11-17 07:55:24,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:55:24,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-17 07:55:24,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:55:24,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-17 07:55:24,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2024-11-17 07:55:24,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-11-17 07:55:24,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 310 transitions, 3628 flow. Second operand has 44 states, 44 states have (on average 13.818181818181818) internal successors, (608), 44 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:24,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:55:24,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-11-17 07:55:24,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:55:28,707 INFO L124 PetriNetUnfolderBase]: 3633/7840 cut-off events. [2024-11-17 07:55:28,708 INFO L125 PetriNetUnfolderBase]: For 122639/122817 co-relation queries the response was YES. [2024-11-17 07:55:28,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41233 conditions, 7840 events. 3633/7840 cut-off events. For 122639/122817 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 60775 event pairs, 199 based on Foata normal form. 82/7918 useless extension candidates. Maximal degree in co-relation 41155. Up to 2780 conditions per place. [2024-11-17 07:55:28,784 INFO L140 encePairwiseOnDemand]: 36/54 looper letters, 315 selfloop transitions, 220 changer transitions 43/596 dead transitions. [2024-11-17 07:55:28,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 596 transitions, 7482 flow [2024-11-17 07:55:28,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-17 07:55:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-11-17 07:55:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 1005 transitions. [2024-11-17 07:55:28,787 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32088122605363983 [2024-11-17 07:55:28,787 INFO L175 Difference]: Start difference. First operand has 260 places, 310 transitions, 3628 flow. Second operand 58 states and 1005 transitions. [2024-11-17 07:55:28,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 596 transitions, 7482 flow [2024-11-17 07:55:29,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 596 transitions, 7174 flow, removed 105 selfloop flow, removed 19 redundant places. [2024-11-17 07:55:29,121 INFO L231 Difference]: Finished difference. Result has 308 places, 385 transitions, 5197 flow [2024-11-17 07:55:29,121 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=5197, PETRI_PLACES=308, PETRI_TRANSITIONS=385} [2024-11-17 07:55:29,122 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 258 predicate places. [2024-11-17 07:55:29,122 INFO L471 AbstractCegarLoop]: Abstraction has has 308 places, 385 transitions, 5197 flow [2024-11-17 07:55:29,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 13.818181818181818) internal successors, (608), 44 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:29,122 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:55:29,122 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:55:29,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-17 07:55:29,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-17 07:55:29,323 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:55:29,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:55:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1028043235, now seen corresponding path program 3 times [2024-11-17 07:55:29,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:55:29,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315407124] [2024-11-17 07:55:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:29,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:55:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:29,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:55:29,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315407124] [2024-11-17 07:55:29,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315407124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:55:29,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721400684] [2024-11-17 07:55:29,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 07:55:29,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:29,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:55:29,781 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:55:29,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 07:55:29,845 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 07:55:29,846 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 07:55:29,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 07:55:29,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:55:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 07:55:29,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:55:29,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 07:55:29,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-11-17 07:55:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 07:55:30,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721400684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:55:30,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:55:30,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 23 [2024-11-17 07:55:30,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838981945] [2024-11-17 07:55:30,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:55:30,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-17 07:55:30,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:55:30,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-17 07:55:30,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2024-11-17 07:55:30,173 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-11-17 07:55:30,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 385 transitions, 5197 flow. Second operand has 24 states, 24 states have (on average 14.375) internal successors, (345), 24 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:30,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:55:30,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-11-17 07:55:30,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:55:32,749 INFO L124 PetriNetUnfolderBase]: 4398/9221 cut-off events. [2024-11-17 07:55:32,749 INFO L125 PetriNetUnfolderBase]: For 160445/160659 co-relation queries the response was YES. [2024-11-17 07:55:32,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52082 conditions, 9221 events. 4398/9221 cut-off events. For 160445/160659 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 71629 event pairs, 351 based on Foata normal form. 240/9431 useless extension candidates. Maximal degree in co-relation 51996. Up to 1611 conditions per place. [2024-11-17 07:55:32,939 INFO L140 encePairwiseOnDemand]: 37/54 looper letters, 420 selfloop transitions, 243 changer transitions 33/714 dead transitions. [2024-11-17 07:55:32,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 714 transitions, 10290 flow [2024-11-17 07:55:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-17 07:55:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-17 07:55:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 857 transitions. [2024-11-17 07:55:32,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3526748971193416 [2024-11-17 07:55:32,941 INFO L175 Difference]: Start difference. First operand has 308 places, 385 transitions, 5197 flow. Second operand 45 states and 857 transitions. [2024-11-17 07:55:32,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 714 transitions, 10290 flow [2024-11-17 07:55:33,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 714 transitions, 9453 flow, removed 360 selfloop flow, removed 23 redundant places. [2024-11-17 07:55:33,320 INFO L231 Difference]: Finished difference. Result has 337 places, 449 transitions, 6357 flow [2024-11-17 07:55:33,321 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=6357, PETRI_PLACES=337, PETRI_TRANSITIONS=449} [2024-11-17 07:55:33,321 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 287 predicate places. [2024-11-17 07:55:33,321 INFO L471 AbstractCegarLoop]: Abstraction has has 337 places, 449 transitions, 6357 flow [2024-11-17 07:55:33,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.375) internal successors, (345), 24 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:33,321 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:55:33,321 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:55:33,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-17 07:55:33,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:33,522 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:55:33,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:55:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1770370833, now seen corresponding path program 4 times [2024-11-17 07:55:33,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:55:33,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61492338] [2024-11-17 07:55:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:33,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:55:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:34,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:55:34,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61492338] [2024-11-17 07:55:34,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61492338] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:55:34,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854625619] [2024-11-17 07:55:34,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-17 07:55:34,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:34,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:55:34,010 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:55:34,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-17 07:55:34,079 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-17 07:55:34,080 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 07:55:34,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-17 07:55:34,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:55:34,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-17 07:55:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:34,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:55:35,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2024-11-17 07:55:35,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 07:55:35,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 139 [2024-11-17 07:55:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:35,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854625619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:55:35,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:55:35,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 46 [2024-11-17 07:55:35,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803239870] [2024-11-17 07:55:35,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:55:35,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-17 07:55:35,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:55:35,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-17 07:55:35,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2024-11-17 07:55:35,958 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-11-17 07:55:35,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 449 transitions, 6357 flow. Second operand has 47 states, 47 states have (on average 13.787234042553191) internal successors, (648), 47 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:35,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:55:35,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-11-17 07:55:35,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:55:42,620 INFO L124 PetriNetUnfolderBase]: 5189/10904 cut-off events. [2024-11-17 07:55:42,620 INFO L125 PetriNetUnfolderBase]: For 203654/203892 co-relation queries the response was YES. [2024-11-17 07:55:42,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64308 conditions, 10904 events. 5189/10904 cut-off events. For 203654/203892 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 87284 event pairs, 369 based on Foata normal form. 354/11230 useless extension candidates. Maximal degree in co-relation 64216. Up to 2824 conditions per place. [2024-11-17 07:55:42,736 INFO L140 encePairwiseOnDemand]: 36/54 looper letters, 408 selfloop transitions, 488 changer transitions 63/977 dead transitions. [2024-11-17 07:55:42,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 977 transitions, 14021 flow [2024-11-17 07:55:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-11-17 07:55:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2024-11-17 07:55:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 1789 transitions. [2024-11-17 07:55:42,739 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31855413105413105 [2024-11-17 07:55:42,739 INFO L175 Difference]: Start difference. First operand has 337 places, 449 transitions, 6357 flow. Second operand 104 states and 1789 transitions. [2024-11-17 07:55:42,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 977 transitions, 14021 flow [2024-11-17 07:55:43,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 977 transitions, 13058 flow, removed 295 selfloop flow, removed 27 redundant places. [2024-11-17 07:55:43,561 INFO L231 Difference]: Finished difference. Result has 432 places, 665 transitions, 10741 flow [2024-11-17 07:55:43,561 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=5786, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=10741, PETRI_PLACES=432, PETRI_TRANSITIONS=665} [2024-11-17 07:55:43,562 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 382 predicate places. [2024-11-17 07:55:43,562 INFO L471 AbstractCegarLoop]: Abstraction has has 432 places, 665 transitions, 10741 flow [2024-11-17 07:55:43,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 13.787234042553191) internal successors, (648), 47 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:43,562 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:55:43,562 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:55:43,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-17 07:55:43,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:43,766 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:55:43,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:55:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1961271358, now seen corresponding path program 2 times [2024-11-17 07:55:43,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:55:43,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667887023] [2024-11-17 07:55:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:43,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:55:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:45,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:55:45,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667887023] [2024-11-17 07:55:45,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667887023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:55:45,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024566416] [2024-11-17 07:55:45,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 07:55:45,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:45,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:55:45,377 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:55:45,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-17 07:55:45,444 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 07:55:45,444 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 07:55:45,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-17 07:55:45,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:55:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 07:55:45,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:55:45,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 07:55:45,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 54 [2024-11-17 07:55:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-17 07:55:46,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024566416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:55:46,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:55:46,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 9] total 42 [2024-11-17 07:55:46,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021139932] [2024-11-17 07:55:46,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:55:46,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-17 07:55:46,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:55:46,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-17 07:55:46,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2024-11-17 07:55:46,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-11-17 07:55:46,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 665 transitions, 10741 flow. Second operand has 44 states, 44 states have (on average 13.022727272727273) internal successors, (573), 44 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:46,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:55:46,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-11-17 07:55:46,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:55:53,182 INFO L124 PetriNetUnfolderBase]: 8170/15923 cut-off events. [2024-11-17 07:55:53,182 INFO L125 PetriNetUnfolderBase]: For 304703/304703 co-relation queries the response was YES. [2024-11-17 07:55:53,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97701 conditions, 15923 events. 8170/15923 cut-off events. For 304703/304703 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 127873 event pairs, 477 based on Foata normal form. 218/16119 useless extension candidates. Maximal degree in co-relation 97586. Up to 3380 conditions per place. [2024-11-17 07:55:53,512 INFO L140 encePairwiseOnDemand]: 36/54 looper letters, 812 selfloop transitions, 582 changer transitions 24/1429 dead transitions. [2024-11-17 07:55:53,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1429 transitions, 23597 flow [2024-11-17 07:55:53,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-17 07:55:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2024-11-17 07:55:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 1704 transitions. [2024-11-17 07:55:53,515 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3287037037037037 [2024-11-17 07:55:53,515 INFO L175 Difference]: Start difference. First operand has 432 places, 665 transitions, 10741 flow. Second operand 96 states and 1704 transitions. [2024-11-17 07:55:53,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1429 transitions, 23597 flow [2024-11-17 07:55:55,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1429 transitions, 21656 flow, removed 827 selfloop flow, removed 34 redundant places. [2024-11-17 07:55:55,210 INFO L231 Difference]: Finished difference. Result has 505 places, 926 transitions, 15592 flow [2024-11-17 07:55:55,211 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=9370, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=15592, PETRI_PLACES=505, PETRI_TRANSITIONS=926} [2024-11-17 07:55:55,211 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 455 predicate places. [2024-11-17 07:55:55,211 INFO L471 AbstractCegarLoop]: Abstraction has has 505 places, 926 transitions, 15592 flow [2024-11-17 07:55:55,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 13.022727272727273) internal successors, (573), 44 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:55,211 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:55:55,212 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:55:55,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-17 07:55:55,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-17 07:55:55,412 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:55:55,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:55:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1557114754, now seen corresponding path program 3 times [2024-11-17 07:55:55,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:55:55,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701462439] [2024-11-17 07:55:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:55:55,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:55:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:55:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:55:56,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:55:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701462439] [2024-11-17 07:55:56,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701462439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:55:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418141967] [2024-11-17 07:55:56,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 07:55:56,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:55:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:55:56,499 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:55:56,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-17 07:55:56,569 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 07:55:56,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 07:55:56,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 07:55:56,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:55:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-17 07:55:56,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:55:56,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 07:55:56,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 54 [2024-11-17 07:55:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-17 07:55:57,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418141967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:55:57,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:55:57,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 38 [2024-11-17 07:55:57,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634570712] [2024-11-17 07:55:57,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:55:57,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-17 07:55:57,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:55:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-17 07:55:57,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1350, Unknown=0, NotChecked=0, Total=1560 [2024-11-17 07:55:57,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-11-17 07:55:57,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 926 transitions, 15592 flow. Second operand has 40 states, 40 states have (on average 13.125) internal successors, (525), 40 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:55:57,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:55:57,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-11-17 07:55:57,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 07:56:04,551 INFO L124 PetriNetUnfolderBase]: 9861/19298 cut-off events. [2024-11-17 07:56:04,551 INFO L125 PetriNetUnfolderBase]: For 373632/373632 co-relation queries the response was YES. [2024-11-17 07:56:04,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123996 conditions, 19298 events. 9861/19298 cut-off events. For 373632/373632 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 160481 event pairs, 365 based on Foata normal form. 82/19361 useless extension candidates. Maximal degree in co-relation 123864. Up to 3470 conditions per place. [2024-11-17 07:56:04,978 INFO L140 encePairwiseOnDemand]: 36/54 looper letters, 704 selfloop transitions, 778 changer transitions 12/1505 dead transitions. [2024-11-17 07:56:04,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 1505 transitions, 26716 flow [2024-11-17 07:56:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-17 07:56:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-11-17 07:56:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 1189 transitions. [2024-11-17 07:56:04,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31910896403650024 [2024-11-17 07:56:04,980 INFO L175 Difference]: Start difference. First operand has 505 places, 926 transitions, 15592 flow. Second operand 69 states and 1189 transitions. [2024-11-17 07:56:04,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 1505 transitions, 26716 flow [2024-11-17 07:56:08,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 1505 transitions, 25744 flow, removed 347 selfloop flow, removed 23 redundant places. [2024-11-17 07:56:08,919 INFO L231 Difference]: Finished difference. Result has 563 places, 1136 transitions, 20964 flow [2024-11-17 07:56:08,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=14882, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=20964, PETRI_PLACES=563, PETRI_TRANSITIONS=1136} [2024-11-17 07:56:08,920 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 513 predicate places. [2024-11-17 07:56:08,920 INFO L471 AbstractCegarLoop]: Abstraction has has 563 places, 1136 transitions, 20964 flow [2024-11-17 07:56:08,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 13.125) internal successors, (525), 40 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:56:08,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 07:56:08,921 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 07:56:08,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-17 07:56:09,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:56:09,121 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-17 07:56:09,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 07:56:09,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1546394891, now seen corresponding path program 5 times [2024-11-17 07:56:09,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 07:56:09,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447178662] [2024-11-17 07:56:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 07:56:09,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 07:56:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 07:56:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 07:56:09,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 07:56:09,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447178662] [2024-11-17 07:56:09,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447178662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 07:56:09,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248168117] [2024-11-17 07:56:09,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-17 07:56:09,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 07:56:09,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 07:56:09,788 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 07:56:09,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-17 07:56:09,854 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-17 07:56:09,854 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 07:56:09,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-17 07:56:09,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 07:56:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 07:56:10,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 07:56:10,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 07:56:10,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2024-11-17 07:56:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-17 07:56:10,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248168117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 07:56:10,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 07:56:10,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 38 [2024-11-17 07:56:10,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244062003] [2024-11-17 07:56:10,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 07:56:10,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-17 07:56:10,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 07:56:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-17 07:56:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2024-11-17 07:56:10,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-11-17 07:56:10,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1136 transitions, 20964 flow. Second operand has 39 states, 39 states have (on average 14.153846153846153) internal successors, (552), 39 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 07:56:10,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 07:56:10,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-11-17 07:56:10,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand