./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/pthread/stack_longer-2.i -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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 19:24:34,091 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 19:24:34,141 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-17 19:24:34,146 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 19:24:34,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 19:24:34,171 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 19:24:34,171 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 19:24:34,171 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 19:24:34,171 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 19:24:34,172 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 19:24:34,172 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 19:24:34,172 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 19:24:34,172 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 19:24:34,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 19:24:34,172 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 19:24:34,172 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 19:24:34,172 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 19:24:34,172 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 19:24:34,172 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 19:24:34,172 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 19:24:34,172 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 19:24:34,174 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 19:24:34,174 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 19:24:34,175 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 19:24:34,175 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-17 19:24:34,175 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 19:24:34,175 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 19:24:34,175 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 19:24:34,175 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 19:24:34,175 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 19:24:34,176 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:24:34,176 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 19:24:34,176 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2025-03-17 19:24:34,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 19:24:34,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 19:24:34,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 19:24:34,428 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 19:24:34,429 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 19:24:34,429 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longer-2.i [2025-03-17 19:24:35,592 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d21bc07c/c2242ac67afb41afa9995d0590bf78c3/FLAG0544ce7d8 [2025-03-17 19:24:35,893 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 19:24:35,895 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i [2025-03-17 19:24:35,911 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d21bc07c/c2242ac67afb41afa9995d0590bf78c3/FLAG0544ce7d8 [2025-03-17 19:24:35,927 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d21bc07c/c2242ac67afb41afa9995d0590bf78c3 [2025-03-17 19:24:35,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 19:24:35,932 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 19:24:35,933 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 19:24:35,934 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 19:24:35,937 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 19:24:35,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:24:35" (1/1) ... [2025-03-17 19:24:35,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e614eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:35, skipping insertion in model container [2025-03-17 19:24:35,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:24:35" (1/1) ... [2025-03-17 19:24:35,973 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 19:24:36,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:24:36,320 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 19:24:36,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:24:36,441 INFO L204 MainTranslator]: Completed translation [2025-03-17 19:24:36,442 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36 WrapperNode [2025-03-17 19:24:36,442 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 19:24:36,443 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 19:24:36,443 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 19:24:36,443 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 19:24:36,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,498 INFO L138 Inliner]: procedures = 277, calls = 431, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 551 [2025-03-17 19:24:36,498 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 19:24:36,499 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 19:24:36,499 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 19:24:36,499 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 19:24:36,505 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,514 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,539 INFO L175 MemorySlicer]: Split 409 memory accesses to 3 slices as follows [2, 402, 5]. 98 percent of accesses are in the largest equivalence class. The 407 initializations are split as follows [2, 400, 5]. The 1 writes are split as follows [0, 1, 0]. [2025-03-17 19:24:36,539 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,540 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,558 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,561 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,563 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,564 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,567 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 19:24:36,569 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 19:24:36,569 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 19:24:36,569 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 19:24:36,570 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (1/1) ... [2025-03-17 19:24:36,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:24:36,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:24:36,601 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) [2025-03-17 19:24:36,607 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 [2025-03-17 19:24:36,622 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-17 19:24:36,623 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-17 19:24:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-17 19:24:36,623 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-17 19:24:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-17 19:24:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 19:24:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 19:24:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-17 19:24:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 19:24:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 19:24:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-17 19:24:36,624 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-17 19:24:36,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 19:24:36,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 19:24:36,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 19:24:36,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-17 19:24:36,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 19:24:36,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 19:24:36,625 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 19:24:36,731 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 19:24:36,733 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 19:24:37,438 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L985-1: pop_#res#1 := 0; [2025-03-17 19:24:37,438 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L983: havoc pop_#t~mem37#1; [2025-03-17 19:24:37,438 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L983-1: havoc pop_#t~ret36#1; [2025-03-17 19:24:37,439 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 19:24:37,439 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 19:24:40,679 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 19:24:40,680 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 19:24:40,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:24:40 BoogieIcfgContainer [2025-03-17 19:24:40,680 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 19:24:40,682 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 19:24:40,682 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 19:24:40,686 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 19:24:40,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:24:35" (1/3) ... [2025-03-17 19:24:40,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c35d417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:24:40, skipping insertion in model container [2025-03-17 19:24:40,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:24:36" (2/3) ... [2025-03-17 19:24:40,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c35d417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:24:40, skipping insertion in model container [2025-03-17 19:24:40,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:24:40" (3/3) ... [2025-03-17 19:24:40,688 INFO L128 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2025-03-17 19:24:40,700 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 19:24:40,702 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stack_longer-2.i that has 3 procedures, 44 locations, 1 initial locations, 2 loop locations, and 8 error locations. [2025-03-17 19:24:40,702 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 19:24:40,764 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 19:24:40,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 48 transitions, 110 flow [2025-03-17 19:24:40,841 INFO L124 PetriNetUnfolderBase]: 5/46 cut-off events. [2025-03-17 19:24:40,844 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 19:24:40,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 5/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 125 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2025-03-17 19:24:40,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 48 transitions, 110 flow [2025-03-17 19:24:40,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 44 transitions, 97 flow [2025-03-17 19:24:40,859 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 19:24:40,871 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;@7b4da3bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 19:24:40,872 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-03-17 19:24:40,892 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 19:24:40,892 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2025-03-17 19:24:40,892 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 19:24:40,892 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:40,893 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:40,893 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:40,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:40,898 INFO L85 PathProgramCache]: Analyzing trace with hash -140526806, now seen corresponding path program 1 times [2025-03-17 19:24:40,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:40,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858208886] [2025-03-17 19:24:40,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:40,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:41,000 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 19:24:41,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 19:24:41,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:41,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:41,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:41,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858208886] [2025-03-17 19:24:41,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858208886] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:41,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:24:41,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 19:24:41,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144498061] [2025-03-17 19:24:41,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:41,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:24:41,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:41,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:24:41,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:24:41,476 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2025-03-17 19:24:41,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:41,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:41,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2025-03-17 19:24:41,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:41,805 INFO L124 PetriNetUnfolderBase]: 726/1447 cut-off events. [2025-03-17 19:24:41,805 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2025-03-17 19:24:41,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2673 conditions, 1447 events. 726/1447 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 7636 event pairs, 220 based on Foata normal form. 42/1347 useless extension candidates. Maximal degree in co-relation 2569. Up to 692 conditions per place. [2025-03-17 19:24:41,823 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 58 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2025-03-17 19:24:41,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 77 transitions, 298 flow [2025-03-17 19:24:41,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:24:41,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:24:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2025-03-17 19:24:41,835 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6875 [2025-03-17 19:24:41,837 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 97 flow. Second operand 4 states and 132 transitions. [2025-03-17 19:24:41,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 77 transitions, 298 flow [2025-03-17 19:24:41,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 77 transitions, 289 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 19:24:41,846 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 128 flow [2025-03-17 19:24:41,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2025-03-17 19:24:41,850 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2025-03-17 19:24:41,851 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 128 flow [2025-03-17 19:24:41,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:41,852 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:41,852 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:41,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 19:24:41,852 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:41,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:41,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1717205249, now seen corresponding path program 1 times [2025-03-17 19:24:41,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:41,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304293671] [2025-03-17 19:24:41,853 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:41,879 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 19:24:41,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 19:24:41,899 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:41,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:42,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:42,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304293671] [2025-03-17 19:24:42,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304293671] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:42,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:24:42,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 19:24:42,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724242770] [2025-03-17 19:24:42,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:42,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:24:42,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:42,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:24:42,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:24:42,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2025-03-17 19:24:42,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:42,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:42,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2025-03-17 19:24:42,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:42,411 INFO L124 PetriNetUnfolderBase]: 1176/2396 cut-off events. [2025-03-17 19:24:42,411 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2025-03-17 19:24:42,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4816 conditions, 2396 events. 1176/2396 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13830 event pairs, 608 based on Foata normal form. 74/2312 useless extension candidates. Maximal degree in co-relation 4155. Up to 1292 conditions per place. [2025-03-17 19:24:42,425 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 71 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2025-03-17 19:24:42,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 88 transitions, 399 flow [2025-03-17 19:24:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:24:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:24:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2025-03-17 19:24:42,427 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6875 [2025-03-17 19:24:42,427 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 128 flow. Second operand 4 states and 132 transitions. [2025-03-17 19:24:42,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 88 transitions, 399 flow [2025-03-17 19:24:42,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 88 transitions, 399 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 19:24:42,429 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 152 flow [2025-03-17 19:24:42,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2025-03-17 19:24:42,430 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2025-03-17 19:24:42,430 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 152 flow [2025-03-17 19:24:42,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:42,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:42,430 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:42,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 19:24:42,430 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:42,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:42,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1765228397, now seen corresponding path program 1 times [2025-03-17 19:24:42,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:42,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291339168] [2025-03-17 19:24:42,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:42,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:42,451 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 19:24:42,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 19:24:42,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:42,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:42,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:42,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291339168] [2025-03-17 19:24:42,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291339168] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:42,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:24:42,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 19:24:42,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70134681] [2025-03-17 19:24:42,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:42,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:24:42,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:42,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:24:42,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:24:42,588 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2025-03-17 19:24:42,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:42,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:42,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2025-03-17 19:24:42,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:42,971 INFO L124 PetriNetUnfolderBase]: 1703/3326 cut-off events. [2025-03-17 19:24:42,971 INFO L125 PetriNetUnfolderBase]: For 993/1035 co-relation queries the response was YES. [2025-03-17 19:24:42,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7360 conditions, 3326 events. 1703/3326 cut-off events. For 993/1035 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 21141 event pairs, 837 based on Foata normal form. 82/3289 useless extension candidates. Maximal degree in co-relation 5256. Up to 1936 conditions per place. [2025-03-17 19:24:42,995 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 72 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2025-03-17 19:24:42,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 439 flow [2025-03-17 19:24:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:24:42,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:24:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2025-03-17 19:24:42,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6927083333333334 [2025-03-17 19:24:42,999 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 152 flow. Second operand 4 states and 133 transitions. [2025-03-17 19:24:42,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 439 flow [2025-03-17 19:24:43,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 433 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:24:43,005 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 174 flow [2025-03-17 19:24:43,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2025-03-17 19:24:43,006 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2025-03-17 19:24:43,007 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 174 flow [2025-03-17 19:24:43,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:43,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:43,007 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:43,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 19:24:43,007 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:43,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:43,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1093705071, now seen corresponding path program 1 times [2025-03-17 19:24:43,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:43,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905467314] [2025-03-17 19:24:43,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:43,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:43,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 19:24:43,042 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 19:24:43,042 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:43,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:43,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905467314] [2025-03-17 19:24:43,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905467314] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:43,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:24:43,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 19:24:43,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308632376] [2025-03-17 19:24:43,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:43,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:24:43,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:43,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:24:43,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 19:24:43,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-17 19:24:43,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 174 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) [2025-03-17 19:24:43,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:43,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-17 19:24:43,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:43,408 INFO L124 PetriNetUnfolderBase]: 898/2004 cut-off events. [2025-03-17 19:24:43,408 INFO L125 PetriNetUnfolderBase]: For 975/1071 co-relation queries the response was YES. [2025-03-17 19:24:43,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4748 conditions, 2004 events. 898/2004 cut-off events. For 975/1071 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12001 event pairs, 285 based on Foata normal form. 76/2031 useless extension candidates. Maximal degree in co-relation 3693. Up to 946 conditions per place. [2025-03-17 19:24:43,420 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 46 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2025-03-17 19:24:43,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 334 flow [2025-03-17 19:24:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 19:24:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 19:24:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-03-17 19:24:43,422 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-17 19:24:43,422 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 174 flow. Second operand 3 states and 96 transitions. [2025-03-17 19:24:43,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 334 flow [2025-03-17 19:24:43,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 328 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 19:24:43,429 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 173 flow [2025-03-17 19:24:43,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2025-03-17 19:24:43,430 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2025-03-17 19:24:43,430 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 173 flow [2025-03-17 19:24:43,430 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) [2025-03-17 19:24:43,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:43,430 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:43,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 19:24:43,430 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:43,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:43,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1511458406, now seen corresponding path program 1 times [2025-03-17 19:24:43,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:43,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10868583] [2025-03-17 19:24:43,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:43,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:43,448 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 19:24:43,462 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 19:24:43,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:43,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:43,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:43,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10868583] [2025-03-17 19:24:43,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10868583] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:24:43,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835546790] [2025-03-17 19:24:43,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:43,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:43,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:24:43,607 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) [2025-03-17 19:24:43,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 19:24:43,673 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 19:24:43,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 19:24:43,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:43,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:43,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:24:43,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:24:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:43,834 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 19:24:43,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835546790] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:43,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 19:24:43,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-17 19:24:43,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42716157] [2025-03-17 19:24:43,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:43,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 19:24:43,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:43,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 19:24:43,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-17 19:24:43,843 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-17 19:24:43,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:43,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:43,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-17 19:24:43,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:44,116 INFO L124 PetriNetUnfolderBase]: 931/2020 cut-off events. [2025-03-17 19:24:44,116 INFO L125 PetriNetUnfolderBase]: For 1020/1126 co-relation queries the response was YES. [2025-03-17 19:24:44,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4988 conditions, 2020 events. 931/2020 cut-off events. For 1020/1126 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11564 event pairs, 189 based on Foata normal form. 70/2037 useless extension candidates. Maximal degree in co-relation 2706. Up to 735 conditions per place. [2025-03-17 19:24:44,128 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 87 selfloop transitions, 9 changer transitions 0/109 dead transitions. [2025-03-17 19:24:44,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 109 transitions, 587 flow [2025-03-17 19:24:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 19:24:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 19:24:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2025-03-17 19:24:44,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2025-03-17 19:24:44,129 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 173 flow. Second operand 7 states and 188 transitions. [2025-03-17 19:24:44,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 109 transitions, 587 flow [2025-03-17 19:24:44,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 109 transitions, 577 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:24:44,133 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 229 flow [2025-03-17 19:24:44,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=229, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2025-03-17 19:24:44,133 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2025-03-17 19:24:44,133 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 229 flow [2025-03-17 19:24:44,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:44,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:44,134 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:44,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 19:24:44,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:44,335 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:44,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:44,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1696288844, now seen corresponding path program 1 times [2025-03-17 19:24:44,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:44,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890644763] [2025-03-17 19:24:44,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:44,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:44,346 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 19:24:44,358 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 19:24:44,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:44,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:44,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:44,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890644763] [2025-03-17 19:24:44,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890644763] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:44,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:24:44,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 19:24:44,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225801977] [2025-03-17 19:24:44,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:44,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:24:44,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:44,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:24:44,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:24:44,413 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-17 19:24:44,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:44,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:44,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-17 19:24:44,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:44,642 INFO L124 PetriNetUnfolderBase]: 1173/2613 cut-off events. [2025-03-17 19:24:44,642 INFO L125 PetriNetUnfolderBase]: For 2099/2217 co-relation queries the response was YES. [2025-03-17 19:24:44,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 2613 events. 1173/2613 cut-off events. For 2099/2217 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 16512 event pairs, 646 based on Foata normal form. 26/2636 useless extension candidates. Maximal degree in co-relation 5218. Up to 1363 conditions per place. [2025-03-17 19:24:44,655 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 63 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2025-03-17 19:24:44,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 84 transitions, 494 flow [2025-03-17 19:24:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:24:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:24:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2025-03-17 19:24:44,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2025-03-17 19:24:44,656 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 229 flow. Second operand 4 states and 115 transitions. [2025-03-17 19:24:44,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 84 transitions, 494 flow [2025-03-17 19:24:44,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 486 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-17 19:24:44,661 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 271 flow [2025-03-17 19:24:44,661 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2025-03-17 19:24:44,661 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2025-03-17 19:24:44,662 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 271 flow [2025-03-17 19:24:44,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:44,662 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:44,662 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:44,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 19:24:44,662 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:44,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash -389428527, now seen corresponding path program 1 times [2025-03-17 19:24:44,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:44,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925724148] [2025-03-17 19:24:44,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:44,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:44,676 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 19:24:44,686 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 19:24:44,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:44,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:44,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:44,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925724148] [2025-03-17 19:24:44,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925724148] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:24:44,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633831740] [2025-03-17 19:24:44,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:44,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:44,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:24:44,793 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) [2025-03-17 19:24:44,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 19:24:44,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 19:24:44,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 19:24:44,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:44,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:44,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:24:44,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:24:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:44,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:24:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:45,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633831740] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:24:45,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:24:45,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-03-17 19:24:45,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050784648] [2025-03-17 19:24:45,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:24:45,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 19:24:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:45,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 19:24:45,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-17 19:24:45,026 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-17 19:24:45,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 271 flow. Second operand has 12 states, 12 states have (on average 18.083333333333332) internal successors, (217), 12 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:45,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:45,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-17 19:24:45,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:45,764 INFO L124 PetriNetUnfolderBase]: 2547/5498 cut-off events. [2025-03-17 19:24:45,765 INFO L125 PetriNetUnfolderBase]: For 7148/7564 co-relation queries the response was YES. [2025-03-17 19:24:45,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14883 conditions, 5498 events. 2547/5498 cut-off events. For 7148/7564 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 35745 event pairs, 407 based on Foata normal form. 151/5648 useless extension candidates. Maximal degree in co-relation 7927. Up to 1167 conditions per place. [2025-03-17 19:24:45,791 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 191 selfloop transitions, 33 changer transitions 0/236 dead transitions. [2025-03-17 19:24:45,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 236 transitions, 1518 flow [2025-03-17 19:24:45,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 19:24:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 19:24:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 426 transitions. [2025-03-17 19:24:45,793 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2025-03-17 19:24:45,793 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 271 flow. Second operand 16 states and 426 transitions. [2025-03-17 19:24:45,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 236 transitions, 1518 flow [2025-03-17 19:24:45,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 236 transitions, 1506 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-17 19:24:45,802 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 598 flow [2025-03-17 19:24:45,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=598, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2025-03-17 19:24:45,803 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2025-03-17 19:24:45,803 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 598 flow [2025-03-17 19:24:45,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.083333333333332) internal successors, (217), 12 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:45,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:45,803 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:45,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 19:24:46,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-03-17 19:24:46,004 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:46,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:46,005 INFO L85 PathProgramCache]: Analyzing trace with hash 126497044, now seen corresponding path program 1 times [2025-03-17 19:24:46,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:46,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193722514] [2025-03-17 19:24:46,005 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:46,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:46,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 19:24:46,023 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 19:24:46,024 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:46,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:46,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:46,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193722514] [2025-03-17 19:24:46,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193722514] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:24:46,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020009876] [2025-03-17 19:24:46,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:46,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:46,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:24:46,106 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) [2025-03-17 19:24:46,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 19:24:46,155 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 19:24:46,230 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 19:24:46,230 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:46,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:46,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 19:24:46,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:24:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:46,259 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 19:24:46,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020009876] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:46,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 19:24:46,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2025-03-17 19:24:46,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033442396] [2025-03-17 19:24:46,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:46,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 19:24:46,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:46,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 19:24:46,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-17 19:24:46,264 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-17 19:24:46,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 598 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:46,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:46,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-17 19:24:46,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:46,743 INFO L124 PetriNetUnfolderBase]: 3236/6478 cut-off events. [2025-03-17 19:24:46,743 INFO L125 PetriNetUnfolderBase]: For 10455/10645 co-relation queries the response was YES. [2025-03-17 19:24:46,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18440 conditions, 6478 events. 3236/6478 cut-off events. For 10455/10645 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 41496 event pairs, 624 based on Foata normal form. 204/6476 useless extension candidates. Maximal degree in co-relation 15532. Up to 2915 conditions per place. [2025-03-17 19:24:46,792 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 125 selfloop transitions, 5 changer transitions 0/152 dead transitions. [2025-03-17 19:24:46,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 152 transitions, 1383 flow [2025-03-17 19:24:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:24:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:24:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-03-17 19:24:46,794 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-17 19:24:46,794 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 598 flow. Second operand 4 states and 116 transitions. [2025-03-17 19:24:46,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 152 transitions, 1383 flow [2025-03-17 19:24:46,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 152 transitions, 1311 flow, removed 29 selfloop flow, removed 3 redundant places. [2025-03-17 19:24:46,809 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 564 flow [2025-03-17 19:24:46,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=564, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2025-03-17 19:24:46,810 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2025-03-17 19:24:46,810 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 564 flow [2025-03-17 19:24:46,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:46,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:46,810 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:46,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 19:24:47,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:47,011 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:47,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:47,011 INFO L85 PathProgramCache]: Analyzing trace with hash -58009365, now seen corresponding path program 1 times [2025-03-17 19:24:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:47,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528398180] [2025-03-17 19:24:47,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:47,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:47,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 19:24:47,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 19:24:47,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:47,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:47,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:47,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528398180] [2025-03-17 19:24:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528398180] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:47,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:24:47,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 19:24:47,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564181887] [2025-03-17 19:24:47,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:47,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 19:24:47,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:47,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 19:24:47,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 19:24:47,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 19:24:47,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 564 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:47,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:47,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 19:24:47,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:47,609 INFO L124 PetriNetUnfolderBase]: 2796/5801 cut-off events. [2025-03-17 19:24:47,610 INFO L125 PetriNetUnfolderBase]: For 11448/11785 co-relation queries the response was YES. [2025-03-17 19:24:47,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17390 conditions, 5801 events. 2796/5801 cut-off events. For 11448/11785 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 37095 event pairs, 564 based on Foata normal form. 39/5835 useless extension candidates. Maximal degree in co-relation 14496. Up to 3403 conditions per place. [2025-03-17 19:24:47,645 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 119 selfloop transitions, 13 changer transitions 0/142 dead transitions. [2025-03-17 19:24:47,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 142 transitions, 1115 flow [2025-03-17 19:24:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 19:24:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 19:24:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2025-03-17 19:24:47,646 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5659722222222222 [2025-03-17 19:24:47,646 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 564 flow. Second operand 6 states and 163 transitions. [2025-03-17 19:24:47,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 142 transitions, 1115 flow [2025-03-17 19:24:47,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 142 transitions, 1075 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 19:24:47,662 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 653 flow [2025-03-17 19:24:47,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=653, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2025-03-17 19:24:47,662 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 45 predicate places. [2025-03-17 19:24:47,662 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 653 flow [2025-03-17 19:24:47,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:47,662 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:47,662 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:47,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 19:24:47,663 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:47,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:47,663 INFO L85 PathProgramCache]: Analyzing trace with hash -373557763, now seen corresponding path program 1 times [2025-03-17 19:24:47,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:47,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537354070] [2025-03-17 19:24:47,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:47,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:47,672 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 19:24:47,678 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 19:24:47,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:47,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 19:24:47,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:47,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537354070] [2025-03-17 19:24:47,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537354070] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:47,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:24:47,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 19:24:47,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399174978] [2025-03-17 19:24:47,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:47,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:24:47,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:47,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:24:47,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:24:47,784 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-17 19:24:47,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 653 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:47,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:47,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-17 19:24:47,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:48,199 INFO L124 PetriNetUnfolderBase]: 3062/6446 cut-off events. [2025-03-17 19:24:48,199 INFO L125 PetriNetUnfolderBase]: For 11343/11481 co-relation queries the response was YES. [2025-03-17 19:24:48,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18211 conditions, 6446 events. 3062/6446 cut-off events. For 11343/11481 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 42695 event pairs, 581 based on Foata normal form. 0/6445 useless extension candidates. Maximal degree in co-relation 15403. Up to 2690 conditions per place. [2025-03-17 19:24:48,235 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 143 selfloop transitions, 6 changer transitions 0/172 dead transitions. [2025-03-17 19:24:48,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 172 transitions, 1615 flow [2025-03-17 19:24:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:24:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:24:48,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-03-17 19:24:48,236 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-17 19:24:48,236 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 653 flow. Second operand 4 states and 116 transitions. [2025-03-17 19:24:48,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 172 transitions, 1615 flow [2025-03-17 19:24:48,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 172 transitions, 1605 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 19:24:48,255 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 665 flow [2025-03-17 19:24:48,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=665, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2025-03-17 19:24:48,255 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2025-03-17 19:24:48,255 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 665 flow [2025-03-17 19:24:48,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:48,256 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:48,256 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:48,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 19:24:48,256 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:48,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2004149545, now seen corresponding path program 1 times [2025-03-17 19:24:48,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:48,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150805778] [2025-03-17 19:24:48,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:48,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:48,269 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 19:24:48,278 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 19:24:48,278 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:48,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:48,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:48,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150805778] [2025-03-17 19:24:48,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150805778] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:24:48,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695037370] [2025-03-17 19:24:48,370 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:48,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:48,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:24:48,372 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) [2025-03-17 19:24:48,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 19:24:48,431 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 19:24:48,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 19:24:48,515 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:48,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:48,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 19:24:48,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:24:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:48,552 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 19:24:48,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695037370] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:48,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 19:24:48,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2025-03-17 19:24:48,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368966104] [2025-03-17 19:24:48,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:48,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 19:24:48,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:48,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 19:24:48,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-17 19:24:48,560 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-17 19:24:48,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 665 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:48,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:48,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-17 19:24:48,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:49,004 INFO L124 PetriNetUnfolderBase]: 3167/6166 cut-off events. [2025-03-17 19:24:49,004 INFO L125 PetriNetUnfolderBase]: For 14463/14475 co-relation queries the response was YES. [2025-03-17 19:24:49,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19479 conditions, 6166 events. 3167/6166 cut-off events. For 14463/14475 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 38721 event pairs, 544 based on Foata normal form. 178/6161 useless extension candidates. Maximal degree in co-relation 18617. Up to 3741 conditions per place. [2025-03-17 19:24:49,039 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 96 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2025-03-17 19:24:49,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 123 transitions, 1087 flow [2025-03-17 19:24:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:24:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:24:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2025-03-17 19:24:49,040 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-17 19:24:49,040 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 665 flow. Second operand 4 states and 112 transitions. [2025-03-17 19:24:49,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 123 transitions, 1087 flow [2025-03-17 19:24:49,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 1065 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 19:24:49,060 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 663 flow [2025-03-17 19:24:49,060 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=663, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2025-03-17 19:24:49,061 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2025-03-17 19:24:49,061 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 663 flow [2025-03-17 19:24:49,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:49,061 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:49,061 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-17 19:24:49,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 19:24:49,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:49,262 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:49,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:49,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1999092602, now seen corresponding path program 1 times [2025-03-17 19:24:49,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:49,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273732121] [2025-03-17 19:24:49,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:49,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:49,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 19:24:49,278 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 19:24:49,279 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:49,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 19:24:49,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:49,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273732121] [2025-03-17 19:24:49,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273732121] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:49,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:24:49,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 19:24:49,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923929986] [2025-03-17 19:24:49,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:49,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:24:49,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:49,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:24:49,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:24:49,326 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-17 19:24:49,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 663 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:49,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:49,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-17 19:24:49,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:49,880 INFO L124 PetriNetUnfolderBase]: 2926/5852 cut-off events. [2025-03-17 19:24:49,880 INFO L125 PetriNetUnfolderBase]: For 12731/12756 co-relation queries the response was YES. [2025-03-17 19:24:49,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18203 conditions, 5852 events. 2926/5852 cut-off events. For 12731/12756 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 36721 event pairs, 615 based on Foata normal form. 178/6027 useless extension candidates. Maximal degree in co-relation 15480. Up to 2981 conditions per place. [2025-03-17 19:24:49,915 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 107 selfloop transitions, 6 changer transitions 0/135 dead transitions. [2025-03-17 19:24:49,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 1215 flow [2025-03-17 19:24:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:24:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:24:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-03-17 19:24:49,916 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-17 19:24:49,916 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 663 flow. Second operand 4 states and 116 transitions. [2025-03-17 19:24:49,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 1215 flow [2025-03-17 19:24:49,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 1205 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 19:24:49,939 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 669 flow [2025-03-17 19:24:49,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=669, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2025-03-17 19:24:49,941 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2025-03-17 19:24:49,941 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 669 flow [2025-03-17 19:24:49,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:49,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:49,941 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:49,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 19:24:49,942 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:49,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:49,943 INFO L85 PathProgramCache]: Analyzing trace with hash 762433241, now seen corresponding path program 1 times [2025-03-17 19:24:49,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:49,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92001415] [2025-03-17 19:24:49,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:49,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:49,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 19:24:49,971 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 19:24:49,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:49,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:50,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92001415] [2025-03-17 19:24:50,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92001415] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:50,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:24:50,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 19:24:50,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90890608] [2025-03-17 19:24:50,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:50,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 19:24:50,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:50,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 19:24:50,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 19:24:50,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 19:24:50,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 669 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:50,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:50,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 19:24:50,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:50,699 INFO L124 PetriNetUnfolderBase]: 2862/5763 cut-off events. [2025-03-17 19:24:50,700 INFO L125 PetriNetUnfolderBase]: For 14686/14686 co-relation queries the response was YES. [2025-03-17 19:24:50,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18437 conditions, 5763 events. 2862/5763 cut-off events. For 14686/14686 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 36319 event pairs, 455 based on Foata normal form. 104/5862 useless extension candidates. Maximal degree in co-relation 15445. Up to 3054 conditions per place. [2025-03-17 19:24:50,738 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 85 selfloop transitions, 35 changer transitions 0/129 dead transitions. [2025-03-17 19:24:50,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 129 transitions, 1104 flow [2025-03-17 19:24:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 19:24:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 19:24:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2025-03-17 19:24:50,739 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2025-03-17 19:24:50,739 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 669 flow. Second operand 7 states and 162 transitions. [2025-03-17 19:24:50,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 129 transitions, 1104 flow [2025-03-17 19:24:50,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 129 transitions, 1080 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-17 19:24:50,762 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 752 flow [2025-03-17 19:24:50,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=752, PETRI_PLACES=93, PETRI_TRANSITIONS=85} [2025-03-17 19:24:50,762 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 47 predicate places. [2025-03-17 19:24:50,762 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 752 flow [2025-03-17 19:24:50,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:50,763 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:50,763 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2025-03-17 19:24:50,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 19:24:50,763 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:50,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1016629294, now seen corresponding path program 1 times [2025-03-17 19:24:50,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:50,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141356967] [2025-03-17 19:24:50,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:50,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:50,777 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 19:24:50,787 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 19:24:50,787 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:50,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:50,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:50,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141356967] [2025-03-17 19:24:50,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141356967] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:24:50,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:24:50,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 19:24:50,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929042215] [2025-03-17 19:24:50,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:24:50,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 19:24:50,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:50,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 19:24:50,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-17 19:24:50,939 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 19:24:50,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 752 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:50,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:50,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 19:24:50,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:51,640 INFO L124 PetriNetUnfolderBase]: 3126/6310 cut-off events. [2025-03-17 19:24:51,640 INFO L125 PetriNetUnfolderBase]: For 19709/19709 co-relation queries the response was YES. [2025-03-17 19:24:51,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20391 conditions, 6310 events. 3126/6310 cut-off events. For 19709/19709 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 40295 event pairs, 622 based on Foata normal form. 76/6381 useless extension candidates. Maximal degree in co-relation 17363. Up to 3339 conditions per place. [2025-03-17 19:24:51,676 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 132 selfloop transitions, 17 changer transitions 6/164 dead transitions. [2025-03-17 19:24:51,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 164 transitions, 1455 flow [2025-03-17 19:24:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 19:24:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 19:24:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2025-03-17 19:24:51,678 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5390625 [2025-03-17 19:24:51,678 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 752 flow. Second operand 8 states and 207 transitions. [2025-03-17 19:24:51,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 164 transitions, 1455 flow [2025-03-17 19:24:51,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 164 transitions, 1435 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-17 19:24:51,704 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 873 flow [2025-03-17 19:24:51,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=873, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2025-03-17 19:24:51,704 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 57 predicate places. [2025-03-17 19:24:51,704 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 873 flow [2025-03-17 19:24:51,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:51,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:51,704 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:51,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 19:24:51,705 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:51,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1441123795, now seen corresponding path program 1 times [2025-03-17 19:24:51,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:51,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790870495] [2025-03-17 19:24:51,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:51,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:51,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 19:24:51,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 19:24:51,727 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:51,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:51,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:51,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790870495] [2025-03-17 19:24:51,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790870495] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:24:51,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489115591] [2025-03-17 19:24:51,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:24:51,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:51,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:24:51,858 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) [2025-03-17 19:24:51,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 19:24:51,912 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 19:24:51,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 19:24:51,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:24:51,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:52,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 19:24:52,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:24:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:52,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:24:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:52,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489115591] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:24:52,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:24:52,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-03-17 19:24:52,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949875685] [2025-03-17 19:24:52,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:24:52,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 19:24:52,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:52,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 19:24:52,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2025-03-17 19:24:52,150 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 19:24:52,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 873 flow. Second operand has 16 states, 16 states have (on average 16.625) internal successors, (266), 16 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:52,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:52,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 19:24:52,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:53,033 INFO L124 PetriNetUnfolderBase]: 3465/7034 cut-off events. [2025-03-17 19:24:53,033 INFO L125 PetriNetUnfolderBase]: For 25302/25302 co-relation queries the response was YES. [2025-03-17 19:24:53,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23112 conditions, 7034 events. 3465/7034 cut-off events. For 25302/25302 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 46541 event pairs, 609 based on Foata normal form. 176/7205 useless extension candidates. Maximal degree in co-relation 20220. Up to 1682 conditions per place. [2025-03-17 19:24:53,060 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 174 selfloop transitions, 58 changer transitions 18/259 dead transitions. [2025-03-17 19:24:53,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 259 transitions, 2200 flow [2025-03-17 19:24:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-17 19:24:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-17 19:24:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 426 transitions. [2025-03-17 19:24:53,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2025-03-17 19:24:53,062 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 873 flow. Second operand 18 states and 426 transitions. [2025-03-17 19:24:53,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 259 transitions, 2200 flow [2025-03-17 19:24:53,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 259 transitions, 2178 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-03-17 19:24:53,089 INFO L231 Difference]: Finished difference. Result has 118 places, 98 transitions, 1115 flow [2025-03-17 19:24:53,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1115, PETRI_PLACES=118, PETRI_TRANSITIONS=98} [2025-03-17 19:24:53,090 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 72 predicate places. [2025-03-17 19:24:53,090 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 98 transitions, 1115 flow [2025-03-17 19:24:53,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.625) internal successors, (266), 16 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:53,090 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:53,090 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2025-03-17 19:24:53,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 19:24:53,290 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,SelfDestructingSolverStorable14 [2025-03-17 19:24:53,290 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:53,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2030999155, now seen corresponding path program 2 times [2025-03-17 19:24:53,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:53,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854216974] [2025-03-17 19:24:53,291 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:24:53,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:53,306 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-17 19:24:53,331 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-17 19:24:53,331 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 19:24:53,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:53,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:53,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854216974] [2025-03-17 19:24:53,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854216974] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:24:53,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421729186] [2025-03-17 19:24:53,510 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:24:53,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:53,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:24:53,512 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) [2025-03-17 19:24:53,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 19:24:53,573 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-17 19:24:53,659 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-17 19:24:53,659 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 19:24:53,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:53,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 19:24:53,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:24:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:53,724 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:24:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421729186] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:24:53,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:24:53,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2025-03-17 19:24:53,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676594567] [2025-03-17 19:24:53,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:24:53,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 19:24:53,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:53,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 19:24:53,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2025-03-17 19:24:53,869 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-17 19:24:53,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 98 transitions, 1115 flow. Second operand has 24 states, 24 states have (on average 18.541666666666668) internal successors, (445), 24 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:53,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:53,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-17 19:24:53,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:55,075 INFO L124 PetriNetUnfolderBase]: 5099/10504 cut-off events. [2025-03-17 19:24:55,075 INFO L125 PetriNetUnfolderBase]: For 45598/45598 co-relation queries the response was YES. [2025-03-17 19:24:55,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36061 conditions, 10504 events. 5099/10504 cut-off events. For 45598/45598 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 64281 event pairs, 929 based on Foata normal form. 208/10707 useless extension candidates. Maximal degree in co-relation 29033. Up to 2336 conditions per place. [2025-03-17 19:24:55,147 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 349 selfloop transitions, 73 changer transitions 0/431 dead transitions. [2025-03-17 19:24:55,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 431 transitions, 4018 flow [2025-03-17 19:24:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 19:24:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-17 19:24:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 672 transitions. [2025-03-17 19:24:55,149 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-17 19:24:55,149 INFO L175 Difference]: Start difference. First operand has 118 places, 98 transitions, 1115 flow. Second operand 24 states and 672 transitions. [2025-03-17 19:24:55,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 431 transitions, 4018 flow [2025-03-17 19:24:55,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 431 transitions, 3818 flow, removed 66 selfloop flow, removed 7 redundant places. [2025-03-17 19:24:55,204 INFO L231 Difference]: Finished difference. Result has 138 places, 140 transitions, 1835 flow [2025-03-17 19:24:55,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1835, PETRI_PLACES=138, PETRI_TRANSITIONS=140} [2025-03-17 19:24:55,204 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 92 predicate places. [2025-03-17 19:24:55,204 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 140 transitions, 1835 flow [2025-03-17 19:24:55,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 18.541666666666668) internal successors, (445), 24 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:55,205 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:55,205 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:55,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 19:24:55,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-17 19:24:55,405 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:55,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:55,406 INFO L85 PathProgramCache]: Analyzing trace with hash 832381798, now seen corresponding path program 2 times [2025-03-17 19:24:55,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:55,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839504887] [2025-03-17 19:24:55,406 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:24:55,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:55,416 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-17 19:24:55,474 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-17 19:24:55,474 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 19:24:55,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:55,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:55,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839504887] [2025-03-17 19:24:55,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839504887] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:24:55,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446957642] [2025-03-17 19:24:55,801 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:24:55,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:55,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:24:55,803 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) [2025-03-17 19:24:55,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 19:24:55,866 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-17 19:24:56,007 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-17 19:24:56,008 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 19:24:56,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:56,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 19:24:56,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:24:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:56,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:24:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:56,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446957642] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:24:56,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:24:56,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2025-03-17 19:24:56,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628994193] [2025-03-17 19:24:56,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:24:56,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 19:24:56,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:56,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 19:24:56,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2025-03-17 19:24:56,180 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 19:24:56,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 140 transitions, 1835 flow. Second operand has 18 states, 18 states have (on average 17.11111111111111) internal successors, (308), 18 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:56,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:56,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 19:24:56,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:24:57,595 INFO L124 PetriNetUnfolderBase]: 6158/12597 cut-off events. [2025-03-17 19:24:57,596 INFO L125 PetriNetUnfolderBase]: For 62164/62164 co-relation queries the response was YES. [2025-03-17 19:24:57,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43570 conditions, 12597 events. 6158/12597 cut-off events. For 62164/62164 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 80596 event pairs, 735 based on Foata normal form. 72/12664 useless extension candidates. Maximal degree in co-relation 40531. Up to 3367 conditions per place. [2025-03-17 19:24:57,681 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 259 selfloop transitions, 96 changer transitions 0/364 dead transitions. [2025-03-17 19:24:57,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 364 transitions, 3851 flow [2025-03-17 19:24:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 19:24:57,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-17 19:24:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 479 transitions. [2025-03-17 19:24:57,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49895833333333334 [2025-03-17 19:24:57,683 INFO L175 Difference]: Start difference. First operand has 138 places, 140 transitions, 1835 flow. Second operand 20 states and 479 transitions. [2025-03-17 19:24:57,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 364 transitions, 3851 flow [2025-03-17 19:24:57,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 364 transitions, 3705 flow, removed 23 selfloop flow, removed 9 redundant places. [2025-03-17 19:24:57,758 INFO L231 Difference]: Finished difference. Result has 155 places, 169 transitions, 2454 flow [2025-03-17 19:24:57,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2454, PETRI_PLACES=155, PETRI_TRANSITIONS=169} [2025-03-17 19:24:57,759 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 109 predicate places. [2025-03-17 19:24:57,759 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 169 transitions, 2454 flow [2025-03-17 19:24:57,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.11111111111111) internal successors, (308), 18 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:57,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:24:57,759 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:24:57,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 19:24:57,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:57,963 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:24:57,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:24:57,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1074793778, now seen corresponding path program 3 times [2025-03-17 19:24:57,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:24:57,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582941268] [2025-03-17 19:24:57,964 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 19:24:57,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:24:57,978 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 4 equivalence classes. [2025-03-17 19:24:58,105 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 76 of 76 statements. [2025-03-17 19:24:58,106 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-17 19:24:58,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:58,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:24:58,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582941268] [2025-03-17 19:24:58,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582941268] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:24:58,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191182561] [2025-03-17 19:24:58,474 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 19:24:58,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:24:58,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:24:58,476 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) [2025-03-17 19:24:58,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 19:24:58,548 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 4 equivalence classes. [2025-03-17 19:24:58,853 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 76 of 76 statements. [2025-03-17 19:24:58,853 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-17 19:24:58,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:24:58,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 19:24:58,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:24:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:58,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:24:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:24:59,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191182561] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:24:59,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:24:59,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2025-03-17 19:24:59,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169624452] [2025-03-17 19:24:59,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:24:59,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 19:24:59,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:24:59,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 19:24:59,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2025-03-17 19:24:59,108 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 19:24:59,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 169 transitions, 2454 flow. Second operand has 26 states, 26 states have (on average 17.076923076923077) internal successors, (444), 26 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:24:59,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:24:59,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 19:24:59,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:25:01,127 INFO L124 PetriNetUnfolderBase]: 7794/15853 cut-off events. [2025-03-17 19:25:01,127 INFO L125 PetriNetUnfolderBase]: For 97346/97346 co-relation queries the response was YES. [2025-03-17 19:25:01,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56387 conditions, 15853 events. 7794/15853 cut-off events. For 97346/97346 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 107111 event pairs, 785 based on Foata normal form. 120/15968 useless extension candidates. Maximal degree in co-relation 53272. Up to 2703 conditions per place. [2025-03-17 19:25:01,259 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 356 selfloop transitions, 167 changer transitions 0/532 dead transitions. [2025-03-17 19:25:01,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 532 transitions, 5711 flow [2025-03-17 19:25:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-17 19:25:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-03-17 19:25:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 742 transitions. [2025-03-17 19:25:01,261 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4986559139784946 [2025-03-17 19:25:01,261 INFO L175 Difference]: Start difference. First operand has 155 places, 169 transitions, 2454 flow. Second operand 31 states and 742 transitions. [2025-03-17 19:25:01,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 532 transitions, 5711 flow [2025-03-17 19:25:01,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 532 transitions, 5605 flow, removed 24 selfloop flow, removed 9 redundant places. [2025-03-17 19:25:01,397 INFO L231 Difference]: Finished difference. Result has 184 places, 222 transitions, 3646 flow [2025-03-17 19:25:01,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3646, PETRI_PLACES=184, PETRI_TRANSITIONS=222} [2025-03-17 19:25:01,397 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 138 predicate places. [2025-03-17 19:25:01,397 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 222 transitions, 3646 flow [2025-03-17 19:25:01,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.076923076923077) internal successors, (444), 26 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:25:01,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:25:01,398 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:25:01,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 19:25:01,598 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,SelfDestructingSolverStorable17 [2025-03-17 19:25:01,598 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:25:01,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:25:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1836235127, now seen corresponding path program 1 times [2025-03-17 19:25:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:25:01,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434653833] [2025-03-17 19:25:01,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:25:01,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:25:01,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-03-17 19:25:01,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-03-17 19:25:01,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:25:01,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:25:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 19:25:01,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:25:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434653833] [2025-03-17 19:25:01,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434653833] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:25:01,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576512146] [2025-03-17 19:25:01,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:25:01,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:25:01,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:25:01,925 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) [2025-03-17 19:25:01,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 19:25:01,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-03-17 19:25:02,102 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-03-17 19:25:02,103 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:25:02,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:25:02,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 1314 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 19:25:02,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:25:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 19:25:02,245 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:25:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 19:25:02,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576512146] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:25:02,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:25:02,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2025-03-17 19:25:02,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624910695] [2025-03-17 19:25:02,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:25:02,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 19:25:02,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:25:02,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 19:25:02,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2025-03-17 19:25:02,450 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 19:25:02,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 222 transitions, 3646 flow. Second operand has 26 states, 26 states have (on average 17.46153846153846) internal successors, (454), 26 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:25:02,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:25:02,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 19:25:02,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:25:05,462 INFO L124 PetriNetUnfolderBase]: 11256/22941 cut-off events. [2025-03-17 19:25:05,462 INFO L125 PetriNetUnfolderBase]: For 177176/177176 co-relation queries the response was YES. [2025-03-17 19:25:05,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84599 conditions, 22941 events. 11256/22941 cut-off events. For 177176/177176 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 169209 event pairs, 1201 based on Foata normal form. 220/23156 useless extension candidates. Maximal degree in co-relation 81588. Up to 3933 conditions per place. [2025-03-17 19:25:05,711 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 343 selfloop transitions, 277 changer transitions 0/629 dead transitions. [2025-03-17 19:25:05,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 629 transitions, 8284 flow [2025-03-17 19:25:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-17 19:25:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-03-17 19:25:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 738 transitions. [2025-03-17 19:25:05,713 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48046875 [2025-03-17 19:25:05,713 INFO L175 Difference]: Start difference. First operand has 184 places, 222 transitions, 3646 flow. Second operand 32 states and 738 transitions. [2025-03-17 19:25:05,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 629 transitions, 8284 flow [2025-03-17 19:25:06,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 629 transitions, 8030 flow, removed 87 selfloop flow, removed 10 redundant places. [2025-03-17 19:25:06,018 INFO L231 Difference]: Finished difference. Result has 212 places, 337 transitions, 6221 flow [2025-03-17 19:25:06,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3520, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6221, PETRI_PLACES=212, PETRI_TRANSITIONS=337} [2025-03-17 19:25:06,019 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 166 predicate places. [2025-03-17 19:25:06,019 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 337 transitions, 6221 flow [2025-03-17 19:25:06,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.46153846153846) internal successors, (454), 26 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:25:06,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:25:06,019 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2025-03-17 19:25:06,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 19:25:06,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:25:06,220 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:25:06,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:25:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash -857173491, now seen corresponding path program 3 times [2025-03-17 19:25:06,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:25:06,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721408258] [2025-03-17 19:25:06,221 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 19:25:06,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:25:06,238 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 119 statements into 11 equivalence classes. [2025-03-17 19:25:06,386 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 119 of 119 statements. [2025-03-17 19:25:06,386 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-17 19:25:06,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:25:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:25:07,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:25:07,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721408258] [2025-03-17 19:25:07,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721408258] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:25:07,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342073626] [2025-03-17 19:25:07,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 19:25:07,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:25:07,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:25:07,199 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) [2025-03-17 19:25:07,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 19:25:07,289 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 119 statements into 11 equivalence classes. [2025-03-17 19:25:08,119 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 119 of 119 statements. [2025-03-17 19:25:08,120 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-17 19:25:08,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:25:08,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-17 19:25:08,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:25:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:25:08,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:25:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:25:08,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342073626] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:25:08,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:25:08,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 46 [2025-03-17 19:25:08,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832753481] [2025-03-17 19:25:08,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:25:08,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-17 19:25:08,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:25:08,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-17 19:25:08,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2025-03-17 19:25:08,636 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-17 19:25:08,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 337 transitions, 6221 flow. Second operand has 48 states, 48 states have (on average 18.770833333333332) internal successors, (901), 48 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:25:08,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:25:08,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-17 19:25:08,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:25:14,844 INFO L124 PetriNetUnfolderBase]: 15536/31937 cut-off events. [2025-03-17 19:25:14,844 INFO L125 PetriNetUnfolderBase]: For 280382/280382 co-relation queries the response was YES. [2025-03-17 19:25:15,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118593 conditions, 31937 events. 15536/31937 cut-off events. For 280382/280382 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 222213 event pairs, 4023 based on Foata normal form. 468/32400 useless extension candidates. Maximal degree in co-relation 89068. Up to 11871 conditions per place. [2025-03-17 19:25:15,146 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 840 selfloop transitions, 188 changer transitions 0/1037 dead transitions. [2025-03-17 19:25:15,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1037 transitions, 12625 flow [2025-03-17 19:25:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-17 19:25:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-03-17 19:25:15,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1360 transitions. [2025-03-17 19:25:15,149 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2025-03-17 19:25:15,149 INFO L175 Difference]: Start difference. First operand has 212 places, 337 transitions, 6221 flow. Second operand 48 states and 1360 transitions. [2025-03-17 19:25:15,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 1037 transitions, 12625 flow [2025-03-17 19:25:15,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 1037 transitions, 12421 flow, removed 58 selfloop flow, removed 10 redundant places. [2025-03-17 19:25:15,678 INFO L231 Difference]: Finished difference. Result has 261 places, 413 transitions, 7931 flow [2025-03-17 19:25:15,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=7931, PETRI_PLACES=261, PETRI_TRANSITIONS=413} [2025-03-17 19:25:15,679 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 215 predicate places. [2025-03-17 19:25:15,679 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 413 transitions, 7931 flow [2025-03-17 19:25:15,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 18.770833333333332) internal successors, (901), 48 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:25:15,679 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:25:15,680 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:25:15,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-17 19:25:15,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:25:15,880 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:25:15,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:25:15,881 INFO L85 PathProgramCache]: Analyzing trace with hash 573875050, now seen corresponding path program 4 times [2025-03-17 19:25:15,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:25:15,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140459860] [2025-03-17 19:25:15,881 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 19:25:15,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:25:15,906 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 120 statements into 2 equivalence classes. [2025-03-17 19:25:15,933 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 120 of 120 statements. [2025-03-17 19:25:15,933 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 19:25:15,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:25:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:25:16,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:25:16,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140459860] [2025-03-17 19:25:16,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140459860] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:25:16,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014846908] [2025-03-17 19:25:16,417 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 19:25:16,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:25:16,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:25:16,419 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) [2025-03-17 19:25:16,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 19:25:16,507 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 120 statements into 2 equivalence classes. [2025-03-17 19:25:16,632 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 120 of 120 statements. [2025-03-17 19:25:16,632 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 19:25:16,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:25:16,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-17 19:25:16,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:25:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:25:16,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:25:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:25:17,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014846908] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:25:17,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:25:17,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 40 [2025-03-17 19:25:17,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745472062] [2025-03-17 19:25:17,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:25:17,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-17 19:25:17,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:25:17,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-17 19:25:17,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1298, Unknown=0, NotChecked=0, Total=1722 [2025-03-17 19:25:17,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 19:25:17,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 413 transitions, 7931 flow. Second operand has 42 states, 42 states have (on average 17.047619047619047) internal successors, (716), 42 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:25:17,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:25:17,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 19:25:17,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:25:26,132 INFO L124 PetriNetUnfolderBase]: 20947/42718 cut-off events. [2025-03-17 19:25:26,132 INFO L125 PetriNetUnfolderBase]: For 428780/428780 co-relation queries the response was YES. [2025-03-17 19:25:26,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160617 conditions, 42718 events. 20947/42718 cut-off events. For 428780/428780 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 312181 event pairs, 2343 based on Foata normal form. 228/42941 useless extension candidates. Maximal degree in co-relation 157042. Up to 7338 conditions per place. [2025-03-17 19:25:26,760 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 654 selfloop transitions, 469 changer transitions 0/1132 dead transitions. [2025-03-17 19:25:26,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1132 transitions, 15850 flow [2025-03-17 19:25:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-17 19:25:26,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2025-03-17 19:25:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 1248 transitions. [2025-03-17 19:25:26,762 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-17 19:25:26,762 INFO L175 Difference]: Start difference. First operand has 261 places, 413 transitions, 7931 flow. Second operand 52 states and 1248 transitions. [2025-03-17 19:25:26,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1132 transitions, 15850 flow [2025-03-17 19:25:27,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1132 transitions, 15313 flow, removed 115 selfloop flow, removed 17 redundant places. [2025-03-17 19:25:27,826 INFO L231 Difference]: Finished difference. Result has 318 places, 576 transitions, 12132 flow [2025-03-17 19:25:27,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7403, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=12132, PETRI_PLACES=318, PETRI_TRANSITIONS=576} [2025-03-17 19:25:27,826 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 272 predicate places. [2025-03-17 19:25:27,826 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 576 transitions, 12132 flow [2025-03-17 19:25:27,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 17.047619047619047) internal successors, (716), 42 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:25:27,827 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:25:27,827 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:25:27,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-17 19:25:28,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-17 19:25:28,027 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:25:28,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:25:28,028 INFO L85 PathProgramCache]: Analyzing trace with hash -263627385, now seen corresponding path program 2 times [2025-03-17 19:25:28,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:25:28,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411724382] [2025-03-17 19:25:28,028 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:25:28,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:25:28,044 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-03-17 19:25:28,063 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-03-17 19:25:28,063 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 19:25:28,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:25:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-17 19:25:28,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:25:28,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411724382] [2025-03-17 19:25:28,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411724382] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:25:28,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374312220] [2025-03-17 19:25:28,447 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:25:28,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:25:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:25:28,449 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) [2025-03-17 19:25:28,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 19:25:28,542 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-03-17 19:25:28,670 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-03-17 19:25:28,670 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 19:25:28,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:25:28,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-17 19:25:28,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:25:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-17 19:25:28,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:25:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-17 19:25:29,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374312220] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:25:29,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:25:29,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2025-03-17 19:25:29,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604075224] [2025-03-17 19:25:29,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:25:29,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-17 19:25:29,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:25:29,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-17 19:25:29,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2025-03-17 19:25:29,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 19:25:29,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 576 transitions, 12132 flow. Second operand has 36 states, 36 states have (on average 17.27777777777778) internal successors, (622), 36 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:25:29,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:25:29,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 19:25:29,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:25:43,027 INFO L124 PetriNetUnfolderBase]: 27341/55812 cut-off events. [2025-03-17 19:25:43,027 INFO L125 PetriNetUnfolderBase]: For 649068/649068 co-relation queries the response was YES. [2025-03-17 19:25:44,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217812 conditions, 55812 events. 27341/55812 cut-off events. For 649068/649068 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 435926 event pairs, 2999 based on Foata normal form. 284/56091 useless extension candidates. Maximal degree in co-relation 214180. Up to 9620 conditions per place. [2025-03-17 19:25:44,433 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 576 selfloop transitions, 652 changer transitions 0/1237 dead transitions. [2025-03-17 19:25:44,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1237 transitions, 21363 flow [2025-03-17 19:25:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-17 19:25:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-17 19:25:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 1043 transitions. [2025-03-17 19:25:44,435 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49384469696969696 [2025-03-17 19:25:44,435 INFO L175 Difference]: Start difference. First operand has 318 places, 576 transitions, 12132 flow. Second operand 44 states and 1043 transitions. [2025-03-17 19:25:44,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1237 transitions, 21363 flow [2025-03-17 19:25:47,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1237 transitions, 20943 flow, removed 184 selfloop flow, removed 7 redundant places. [2025-03-17 19:25:47,231 INFO L231 Difference]: Finished difference. Result has 371 places, 795 transitions, 18508 flow [2025-03-17 19:25:47,231 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=11692, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=464, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=18508, PETRI_PLACES=371, PETRI_TRANSITIONS=795} [2025-03-17 19:25:47,232 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 325 predicate places. [2025-03-17 19:25:47,232 INFO L471 AbstractCegarLoop]: Abstraction has has 371 places, 795 transitions, 18508 flow [2025-03-17 19:25:47,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 17.27777777777778) internal successors, (622), 36 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:25:47,232 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:25:47,232 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:25:47,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 19:25:47,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-17 19:25:47,433 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-17 19:25:47,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:25:47,434 INFO L85 PathProgramCache]: Analyzing trace with hash 56302364, now seen corresponding path program 3 times [2025-03-17 19:25:47,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:25:47,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954799897] [2025-03-17 19:25:47,434 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 19:25:47,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:25:47,452 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 133 statements into 7 equivalence classes. [2025-03-17 19:25:47,586 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 133 of 133 statements. [2025-03-17 19:25:47,586 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-17 19:25:47,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:25:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-17 19:25:48,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:25:48,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954799897] [2025-03-17 19:25:48,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954799897] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:25:48,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369454019] [2025-03-17 19:25:48,333 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 19:25:48,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:25:48,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:25:48,335 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) [2025-03-17 19:25:48,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 19:25:48,438 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 133 statements into 7 equivalence classes. [2025-03-17 19:25:48,961 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 133 of 133 statements. [2025-03-17 19:25:48,961 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-17 19:25:48,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:25:48,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 19:25:48,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:25:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-17 19:25:49,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:25:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-17 19:25:49,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369454019] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:25:49,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:25:49,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 32 [2025-03-17 19:25:49,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611715895] [2025-03-17 19:25:49,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:25:49,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-17 19:25:49,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:25:49,372 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-17 19:25:49,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2025-03-17 19:25:49,420 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 19:25:49,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 795 transitions, 18508 flow. Second operand has 34 states, 34 states have (on average 17.529411764705884) internal successors, (596), 34 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:25:49,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:25:49,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 19:25:49,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand