./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 798a7b37 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_longest-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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 15:08:17,045 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 15:08:17,091 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-04 15:08:17,095 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 15:08:17,096 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 15:08:17,116 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 15:08:17,117 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 15:08:17,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 15:08:17,118 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 15:08:17,118 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 15:08:17,119 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 15:08:17,119 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 15:08:17,119 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 15:08:17,119 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 15:08:17,119 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 15:08:17,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 15:08:17,119 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 15:08:17,119 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 15:08:17,119 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 15:08:17,119 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 15:08:17,119 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 15:08:17,119 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 15:08:17,119 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 15:08:17,120 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 15:08:17,120 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 15:08:17,120 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 15:08:17,120 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 -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2025-03-04 15:08:17,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 15:08:17,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 15:08:17,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 15:08:17,357 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 15:08:17,357 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 15:08:17,358 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longest-2.i [2025-03-04 15:08:18,481 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62fb2ae8c/1e88c720217b4899ad750b4b31753a19/FLAG0f483faac [2025-03-04 15:08:18,743 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 15:08:18,744 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i [2025-03-04 15:08:18,755 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62fb2ae8c/1e88c720217b4899ad750b4b31753a19/FLAG0f483faac [2025-03-04 15:08:18,769 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62fb2ae8c/1e88c720217b4899ad750b4b31753a19 [2025-03-04 15:08:18,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 15:08:18,772 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 15:08:18,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 15:08:18,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 15:08:18,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 15:08:18,777 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 03:08:18" (1/1) ... [2025-03-04 15:08:18,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75a3954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:18, skipping insertion in model container [2025-03-04 15:08:18,778 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 03:08:18" (1/1) ... [2025-03-04 15:08:18,810 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 15:08:19,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 15:08:19,121 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 15:08:19,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 15:08:19,245 INFO L204 MainTranslator]: Completed translation [2025-03-04 15:08:19,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19 WrapperNode [2025-03-04 15:08:19,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 15:08:19,246 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 15:08:19,246 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 15:08:19,246 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 15:08:19,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,268 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,319 INFO L138 Inliner]: procedures = 277, calls = 831, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 951 [2025-03-04 15:08:19,319 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 15:08:19,320 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 15:08:19,320 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 15:08:19,320 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 15:08:19,325 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,338 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,372 INFO L175 MemorySlicer]: Split 809 memory accesses to 3 slices as follows [2, 5, 802]. 99 percent of accesses are in the largest equivalence class. The 807 initializations are split as follows [2, 5, 800]. The 1 writes are split as follows [0, 0, 1]. [2025-03-04 15:08:19,372 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,372 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,403 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,405 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,411 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,417 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,424 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 15:08:19,428 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 15:08:19,429 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 15:08:19,429 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 15:08:19,430 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (1/1) ... [2025-03-04 15:08:19,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 15:08:19,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:08:19,458 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) [2025-03-04 15:08:19,460 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 [2025-03-04 15:08:19,475 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-04 15:08:19,476 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-04 15:08:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-04 15:08:19,476 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-04 15:08:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-04 15:08:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 15:08:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 15:08:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-04 15:08:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 15:08:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 15:08:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-04 15:08:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-04 15:08:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 15:08:19,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 15:08:19,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 15:08:19,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-04 15:08:19,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 15:08:19,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 15:08:19,478 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 15:08:19,573 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 15:08:19,575 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 15:08:20,452 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L985-1: pop_#res#1 := 0; [2025-03-04 15:08:20,452 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L983: havoc pop_#t~mem37#1; [2025-03-04 15:08:20,452 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L983-1: havoc pop_#t~ret36#1; [2025-03-04 15:08:20,453 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 15:08:20,453 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 15:08:30,109 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 15:08:30,109 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 15:08:30,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 03:08:30 BoogieIcfgContainer [2025-03-04 15:08:30,109 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 15:08:30,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 15:08:30,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 15:08:30,114 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 15:08:30,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 03:08:18" (1/3) ... [2025-03-04 15:08:30,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3d4b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 03:08:30, skipping insertion in model container [2025-03-04 15:08:30,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:08:19" (2/3) ... [2025-03-04 15:08:30,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3d4b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 03:08:30, skipping insertion in model container [2025-03-04 15:08:30,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 03:08:30" (3/3) ... [2025-03-04 15:08:30,116 INFO L128 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2025-03-04 15:08:30,129 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 15:08:30,130 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stack_longest-2.i that has 3 procedures, 44 locations, 1 initial locations, 2 loop locations, and 8 error locations. [2025-03-04 15:08:30,131 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 15:08:30,200 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-04 15:08:30,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 48 transitions, 110 flow [2025-03-04 15:08:30,281 INFO L124 PetriNetUnfolderBase]: 5/46 cut-off events. [2025-03-04 15:08:30,285 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 15:08:30,288 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. [2025-03-04 15:08:30,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 48 transitions, 110 flow [2025-03-04 15:08:30,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 44 transitions, 97 flow [2025-03-04 15:08:30,300 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 15:08:30,310 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;@274b6832, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 15:08:30,313 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-03-04 15:08:30,344 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 15:08:30,344 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2025-03-04 15:08:30,344 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-04 15:08:30,344 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:30,345 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:08:30,345 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:30,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1804897589, now seen corresponding path program 1 times [2025-03-04 15:08:30,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:30,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315407503] [2025-03-04 15:08:30,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:30,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:30,465 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-04 15:08:30,593 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-04 15:08:30,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:30,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:30,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:30,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315407503] [2025-03-04 15:08:30,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315407503] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:30,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:08:30,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 15:08:30,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321157710] [2025-03-04 15:08:30,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:30,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:08:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:30,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:08:30,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:08:31,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2025-03-04 15:08:31,007 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) [2025-03-04 15:08:31,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:31,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2025-03-04 15:08:31,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:31,329 INFO L124 PetriNetUnfolderBase]: 730/1442 cut-off events. [2025-03-04 15:08:31,330 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2025-03-04 15:08:31,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 1442 events. 730/1442 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7596 event pairs, 224 based on Foata normal form. 40/1333 useless extension candidates. Maximal degree in co-relation 2569. Up to 692 conditions per place. [2025-03-04 15:08:31,341 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 58 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2025-03-04 15:08:31,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 77 transitions, 298 flow [2025-03-04 15:08:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:08:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:08:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2025-03-04 15:08:31,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6875 [2025-03-04 15:08:31,355 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 97 flow. Second operand 4 states and 132 transitions. [2025-03-04 15:08:31,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 77 transitions, 298 flow [2025-03-04 15:08:31,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 77 transitions, 289 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 15:08:31,365 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 128 flow [2025-03-04 15:08:31,367 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} [2025-03-04 15:08:31,370 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2025-03-04 15:08:31,371 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 128 flow [2025-03-04 15:08:31,371 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) [2025-03-04 15:08:31,371 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:31,371 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:08:31,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 15:08:31,372 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:31,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash -166295456, now seen corresponding path program 1 times [2025-03-04 15:08:31,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:31,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222838829] [2025-03-04 15:08:31,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:31,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:31,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-04 15:08:31,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-04 15:08:31,431 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:31,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:31,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:31,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222838829] [2025-03-04 15:08:31,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222838829] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:31,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:08:31,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 15:08:31,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93831406] [2025-03-04 15:08:31,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:31,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:08:31,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:31,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:08:31,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:08:31,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2025-03-04 15:08:31,627 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) [2025-03-04 15:08:31,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:31,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2025-03-04 15:08:31,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:31,973 INFO L124 PetriNetUnfolderBase]: 1180/2391 cut-off events. [2025-03-04 15:08:31,973 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2025-03-04 15:08:31,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4818 conditions, 2391 events. 1180/2391 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13806 event pairs, 613 based on Foata normal form. 74/2301 useless extension candidates. Maximal degree in co-relation 4166. Up to 1299 conditions per place. [2025-03-04 15:08:31,992 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 71 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2025-03-04 15:08:31,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 88 transitions, 399 flow [2025-03-04 15:08:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:08:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:08:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2025-03-04 15:08:31,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6875 [2025-03-04 15:08:31,995 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 128 flow. Second operand 4 states and 132 transitions. [2025-03-04 15:08:31,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 88 transitions, 399 flow [2025-03-04 15:08:31,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 88 transitions, 399 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-04 15:08:31,998 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 152 flow [2025-03-04 15:08:31,998 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} [2025-03-04 15:08:31,999 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2025-03-04 15:08:32,000 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 152 flow [2025-03-04 15:08:32,000 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) [2025-03-04 15:08:32,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:32,000 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:08:32,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 15:08:32,001 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:32,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash -931664261, now seen corresponding path program 1 times [2025-03-04 15:08:32,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:32,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003158537] [2025-03-04 15:08:32,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:32,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:32,031 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-04 15:08:32,056 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-04 15:08:32,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:32,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:32,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:32,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003158537] [2025-03-04 15:08:32,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003158537] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:32,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:08:32,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 15:08:32,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526371182] [2025-03-04 15:08:32,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:32,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:08:32,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:32,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:08:32,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:08:32,251 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2025-03-04 15:08:32,252 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) [2025-03-04 15:08:32,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:32,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2025-03-04 15:08:32,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:32,610 INFO L124 PetriNetUnfolderBase]: 1703/3326 cut-off events. [2025-03-04 15:08:32,610 INFO L125 PetriNetUnfolderBase]: For 993/1035 co-relation queries the response was YES. [2025-03-04 15:08:32,617 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 21132 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. [2025-03-04 15:08:32,631 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 72 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2025-03-04 15:08:32,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 439 flow [2025-03-04 15:08:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:08:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:08:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2025-03-04 15:08:32,633 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6927083333333334 [2025-03-04 15:08:32,633 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 152 flow. Second operand 4 states and 133 transitions. [2025-03-04 15:08:32,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 439 flow [2025-03-04 15:08:32,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 433 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 15:08:32,640 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 174 flow [2025-03-04 15:08:32,640 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} [2025-03-04 15:08:32,640 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2025-03-04 15:08:32,640 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 174 flow [2025-03-04 15:08:32,641 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) [2025-03-04 15:08:32,641 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:32,641 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:08:32,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 15:08:32,641 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:32,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1222519152, now seen corresponding path program 1 times [2025-03-04 15:08:32,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:32,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777206143] [2025-03-04 15:08:32,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:32,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:32,672 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 15:08:32,694 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 15:08:32,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:32,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:32,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:32,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777206143] [2025-03-04 15:08:32,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777206143] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:32,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:08:32,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 15:08:32,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518073416] [2025-03-04 15:08:32,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:32,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 15:08:32,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:32,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 15:08:32,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 15:08:32,979 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2025-03-04 15:08:32,979 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) [2025-03-04 15:08:32,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:32,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2025-03-04 15:08:32,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:33,203 INFO L124 PetriNetUnfolderBase]: 898/2001 cut-off events. [2025-03-04 15:08:33,203 INFO L125 PetriNetUnfolderBase]: For 983/1079 co-relation queries the response was YES. [2025-03-04 15:08:33,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4745 conditions, 2001 events. 898/2001 cut-off events. For 983/1079 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11998 event pairs, 285 based on Foata normal form. 76/2025 useless extension candidates. Maximal degree in co-relation 3692. Up to 946 conditions per place. [2025-03-04 15:08:33,217 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 46 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2025-03-04 15:08:33,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 334 flow [2025-03-04 15:08:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 15:08:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 15:08:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-03-04 15:08:33,219 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-04 15:08:33,219 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 174 flow. Second operand 3 states and 96 transitions. [2025-03-04 15:08:33,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 334 flow [2025-03-04 15:08:33,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 328 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-04 15:08:33,226 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 173 flow [2025-03-04 15:08:33,226 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} [2025-03-04 15:08:33,227 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2025-03-04 15:08:33,227 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 173 flow [2025-03-04 15:08:33,227 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) [2025-03-04 15:08:33,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:33,227 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:08:33,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-04 15:08:33,227 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:33,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1209728430, now seen corresponding path program 1 times [2025-03-04 15:08:33,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:33,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324320394] [2025-03-04 15:08:33,228 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:33,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:33,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 15:08:33,275 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 15:08:33,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:33,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:33,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:33,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324320394] [2025-03-04 15:08:33,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324320394] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:08:33,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077812064] [2025-03-04 15:08:33,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:33,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:08:33,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:08:33,487 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) [2025-03-04 15:08:33,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 15:08:33,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 15:08:33,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 15:08:33,930 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:33,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:33,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 1763 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 15:08:33,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:08:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:33,985 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 15:08:33,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077812064] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:33,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 15:08:33,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-04 15:08:33,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918945674] [2025-03-04 15:08:33,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:33,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 15:08:33,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:33,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 15:08:33,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-04 15:08:33,996 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-04 15:08:33,997 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) [2025-03-04 15:08:33,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:33,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-04 15:08:33,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:34,283 INFO L124 PetriNetUnfolderBase]: 931/2009 cut-off events. [2025-03-04 15:08:34,283 INFO L125 PetriNetUnfolderBase]: For 1022/1128 co-relation queries the response was YES. [2025-03-04 15:08:34,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4977 conditions, 2009 events. 931/2009 cut-off events. For 1022/1128 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11458 event pairs, 189 based on Foata normal form. 70/2022 useless extension candidates. Maximal degree in co-relation 2701. Up to 735 conditions per place. [2025-03-04 15:08:34,294 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 87 selfloop transitions, 9 changer transitions 0/109 dead transitions. [2025-03-04 15:08:34,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 109 transitions, 587 flow [2025-03-04 15:08:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-04 15:08:34,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-04 15:08:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2025-03-04 15:08:34,295 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2025-03-04 15:08:34,295 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 173 flow. Second operand 7 states and 188 transitions. [2025-03-04 15:08:34,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 109 transitions, 587 flow [2025-03-04 15:08:34,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 109 transitions, 577 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 15:08:34,299 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 229 flow [2025-03-04 15:08:34,299 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} [2025-03-04 15:08:34,300 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2025-03-04 15:08:34,300 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 229 flow [2025-03-04 15:08:34,300 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) [2025-03-04 15:08:34,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:34,300 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] [2025-03-04 15:08:34,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 15:08:34,501 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 [2025-03-04 15:08:34,501 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:34,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:34,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1834984597, now seen corresponding path program 1 times [2025-03-04 15:08:34,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:34,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090299197] [2025-03-04 15:08:34,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:34,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:34,522 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 15:08:34,540 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 15:08:34,540 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:34,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:34,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:34,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090299197] [2025-03-04 15:08:34,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090299197] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:34,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:08:34,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 15:08:34,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460280832] [2025-03-04 15:08:34,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:34,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:08:34,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:34,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:08:34,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:08:34,628 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-04 15:08:34,628 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) [2025-03-04 15:08:34,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:34,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-04 15:08:34,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:34,871 INFO L124 PetriNetUnfolderBase]: 1173/2608 cut-off events. [2025-03-04 15:08:34,872 INFO L125 PetriNetUnfolderBase]: For 2099/2217 co-relation queries the response was YES. [2025-03-04 15:08:34,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6746 conditions, 2608 events. 1173/2608 cut-off events. For 2099/2217 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 16518 event pairs, 646 based on Foata normal form. 26/2627 useless extension candidates. Maximal degree in co-relation 5213. Up to 1363 conditions per place. [2025-03-04 15:08:34,884 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 63 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2025-03-04 15:08:34,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 84 transitions, 494 flow [2025-03-04 15:08:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:08:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:08:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2025-03-04 15:08:34,885 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2025-03-04 15:08:34,885 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 229 flow. Second operand 4 states and 115 transitions. [2025-03-04 15:08:34,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 84 transitions, 494 flow [2025-03-04 15:08:34,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 486 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-04 15:08:34,889 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 271 flow [2025-03-04 15:08:34,890 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} [2025-03-04 15:08:34,890 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2025-03-04 15:08:34,890 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 271 flow [2025-03-04 15:08:34,890 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) [2025-03-04 15:08:34,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:34,890 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:08:34,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-04 15:08:34,891 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:34,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:34,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1153122382, now seen corresponding path program 1 times [2025-03-04 15:08:34,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:34,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616606546] [2025-03-04 15:08:34,891 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:34,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:34,907 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 15:08:34,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 15:08:34,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:34,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:35,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:35,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616606546] [2025-03-04 15:08:35,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616606546] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:08:35,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008688815] [2025-03-04 15:08:35,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:35,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:08:35,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:08:35,072 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) [2025-03-04 15:08:35,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 15:08:35,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 15:08:35,285 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 15:08:35,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:35,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:35,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 15:08:35,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:08:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:35,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:08:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:35,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008688815] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:08:35,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:08:35,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-03-04 15:08:35,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442287828] [2025-03-04 15:08:35,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:08:35,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 15:08:35,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:35,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 15:08:35,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-04 15:08:35,379 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-04 15:08:35,380 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) [2025-03-04 15:08:35,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:35,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-04 15:08:35,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:36,173 INFO L124 PetriNetUnfolderBase]: 2547/5481 cut-off events. [2025-03-04 15:08:36,174 INFO L125 PetriNetUnfolderBase]: For 7148/7564 co-relation queries the response was YES. [2025-03-04 15:08:36,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14866 conditions, 5481 events. 2547/5481 cut-off events. For 7148/7564 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 35571 event pairs, 407 based on Foata normal form. 151/5625 useless extension candidates. Maximal degree in co-relation 7920. Up to 1167 conditions per place. [2025-03-04 15:08:36,208 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 191 selfloop transitions, 33 changer transitions 0/236 dead transitions. [2025-03-04 15:08:36,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 236 transitions, 1518 flow [2025-03-04 15:08:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-04 15:08:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-04 15:08:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 426 transitions. [2025-03-04 15:08:36,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2025-03-04 15:08:36,211 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 271 flow. Second operand 16 states and 426 transitions. [2025-03-04 15:08:36,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 236 transitions, 1518 flow [2025-03-04 15:08:36,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 236 transitions, 1506 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-04 15:08:36,226 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 598 flow [2025-03-04 15:08:36,226 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} [2025-03-04 15:08:36,227 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2025-03-04 15:08:36,227 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 598 flow [2025-03-04 15:08:36,227 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) [2025-03-04 15:08:36,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:36,227 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:08:36,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-04 15:08:36,428 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 [2025-03-04 15:08:36,428 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:36,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:36,429 INFO L85 PathProgramCache]: Analyzing trace with hash -637196811, now seen corresponding path program 1 times [2025-03-04 15:08:36,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:36,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773715985] [2025-03-04 15:08:36,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:36,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:36,445 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 15:08:36,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 15:08:36,455 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:36,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:36,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:36,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773715985] [2025-03-04 15:08:36,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773715985] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:08:36,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335644350] [2025-03-04 15:08:36,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:36,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:08:36,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:08:36,558 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) [2025-03-04 15:08:36,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 15:08:36,613 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 15:08:36,763 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 15:08:36,763 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:36,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:36,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 15:08:36,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:08:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:36,794 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 15:08:36,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335644350] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:36,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 15:08:36,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2025-03-04 15:08:36,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106471709] [2025-03-04 15:08:36,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:36,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 15:08:36,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:36,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 15:08:36,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-04 15:08:36,800 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-04 15:08:36,800 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) [2025-03-04 15:08:36,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:36,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-04 15:08:36,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:37,316 INFO L124 PetriNetUnfolderBase]: 3236/6478 cut-off events. [2025-03-04 15:08:37,316 INFO L125 PetriNetUnfolderBase]: For 10477/10667 co-relation queries the response was YES. [2025-03-04 15:08:37,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18440 conditions, 6478 events. 3236/6478 cut-off events. For 10477/10667 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 41499 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. [2025-03-04 15:08:37,359 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 125 selfloop transitions, 5 changer transitions 0/152 dead transitions. [2025-03-04 15:08:37,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 152 transitions, 1383 flow [2025-03-04 15:08:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:08:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:08:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-03-04 15:08:37,360 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-04 15:08:37,360 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 598 flow. Second operand 4 states and 116 transitions. [2025-03-04 15:08:37,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 152 transitions, 1383 flow [2025-03-04 15:08:37,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 152 transitions, 1311 flow, removed 29 selfloop flow, removed 3 redundant places. [2025-03-04 15:08:37,377 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 564 flow [2025-03-04 15:08:37,377 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} [2025-03-04 15:08:37,379 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2025-03-04 15:08:37,379 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 564 flow [2025-03-04 15:08:37,379 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) [2025-03-04 15:08:37,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:37,380 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] [2025-03-04 15:08:37,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 15:08:37,584 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 [2025-03-04 15:08:37,584 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:37,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2037285715, now seen corresponding path program 1 times [2025-03-04 15:08:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:37,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515841968] [2025-03-04 15:08:37,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:37,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:37,603 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-04 15:08:37,618 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 15:08:37,619 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:37,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:37,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:37,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515841968] [2025-03-04 15:08:37,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515841968] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:37,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:08:37,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 15:08:37,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937608784] [2025-03-04 15:08:37,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:37,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 15:08:37,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:37,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 15:08:37,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-04 15:08:37,756 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 15:08:37,757 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) [2025-03-04 15:08:37,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:37,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 15:08:37,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:38,222 INFO L124 PetriNetUnfolderBase]: 2796/5801 cut-off events. [2025-03-04 15:08:38,222 INFO L125 PetriNetUnfolderBase]: For 11448/11785 co-relation queries the response was YES. [2025-03-04 15:08:38,239 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 37128 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. [2025-03-04 15:08:38,256 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 119 selfloop transitions, 13 changer transitions 0/142 dead transitions. [2025-03-04 15:08:38,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 142 transitions, 1115 flow [2025-03-04 15:08:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 15:08:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 15:08:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2025-03-04 15:08:38,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5659722222222222 [2025-03-04 15:08:38,258 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 564 flow. Second operand 6 states and 163 transitions. [2025-03-04 15:08:38,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 142 transitions, 1115 flow [2025-03-04 15:08:38,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 142 transitions, 1075 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 15:08:38,275 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 653 flow [2025-03-04 15:08:38,275 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} [2025-03-04 15:08:38,276 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 45 predicate places. [2025-03-04 15:08:38,277 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 653 flow [2025-03-04 15:08:38,277 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) [2025-03-04 15:08:38,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:38,277 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:08:38,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-04 15:08:38,277 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:38,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1721737317, now seen corresponding path program 1 times [2025-03-04 15:08:38,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:38,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689036587] [2025-03-04 15:08:38,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:38,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:38,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-04 15:08:38,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 15:08:38,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:38,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 15:08:38,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:38,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689036587] [2025-03-04 15:08:38,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689036587] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:38,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:08:38,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 15:08:38,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822550] [2025-03-04 15:08:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:38,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:08:38,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:38,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:08:38,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:08:38,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-04 15:08:38,368 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) [2025-03-04 15:08:38,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:38,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-04 15:08:38,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:38,811 INFO L124 PetriNetUnfolderBase]: 3062/6446 cut-off events. [2025-03-04 15:08:38,811 INFO L125 PetriNetUnfolderBase]: For 11345/11483 co-relation queries the response was YES. [2025-03-04 15:08:38,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18211 conditions, 6446 events. 3062/6446 cut-off events. For 11345/11483 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. [2025-03-04 15:08:38,849 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 143 selfloop transitions, 6 changer transitions 0/172 dead transitions. [2025-03-04 15:08:38,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 172 transitions, 1615 flow [2025-03-04 15:08:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:08:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:08:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-03-04 15:08:38,850 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-04 15:08:38,850 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 653 flow. Second operand 4 states and 116 transitions. [2025-03-04 15:08:38,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 172 transitions, 1615 flow [2025-03-04 15:08:38,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 172 transitions, 1605 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 15:08:38,869 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 665 flow [2025-03-04 15:08:38,870 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} [2025-03-04 15:08:38,870 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2025-03-04 15:08:38,870 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 665 flow [2025-03-04 15:08:38,870 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) [2025-03-04 15:08:38,870 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:38,870 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-04 15:08:38,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-04 15:08:38,871 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:38,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:38,871 INFO L85 PathProgramCache]: Analyzing trace with hash 172669304, now seen corresponding path program 1 times [2025-03-04 15:08:38,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:38,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626874886] [2025-03-04 15:08:38,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:38,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:38,886 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-04 15:08:38,899 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 15:08:38,899 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:38,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:39,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:39,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626874886] [2025-03-04 15:08:39,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626874886] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:08:39,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198168597] [2025-03-04 15:08:39,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:39,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:08:39,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:08:39,027 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) [2025-03-04 15:08:39,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 15:08:39,090 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-04 15:08:39,241 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 15:08:39,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:39,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:39,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 15:08:39,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:08:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:39,286 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 15:08:39,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198168597] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:39,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 15:08:39,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2025-03-04 15:08:39,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27395628] [2025-03-04 15:08:39,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:39,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 15:08:39,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:39,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 15:08:39,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-04 15:08:39,294 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-04 15:08:39,295 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) [2025-03-04 15:08:39,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:39,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-04 15:08:39,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:39,739 INFO L124 PetriNetUnfolderBase]: 3167/6171 cut-off events. [2025-03-04 15:08:39,739 INFO L125 PetriNetUnfolderBase]: For 14460/14472 co-relation queries the response was YES. [2025-03-04 15:08:39,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19486 conditions, 6171 events. 3167/6171 cut-off events. For 14460/14472 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 38767 event pairs, 544 based on Foata normal form. 178/6171 useless extension candidates. Maximal degree in co-relation 18624. Up to 3741 conditions per place. [2025-03-04 15:08:39,773 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 96 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2025-03-04 15:08:39,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 123 transitions, 1087 flow [2025-03-04 15:08:39,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:08:39,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:08:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2025-03-04 15:08:39,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-04 15:08:39,774 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 665 flow. Second operand 4 states and 112 transitions. [2025-03-04 15:08:39,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 123 transitions, 1087 flow [2025-03-04 15:08:39,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 1065 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 15:08:39,792 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 663 flow [2025-03-04 15:08:39,793 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} [2025-03-04 15:08:39,793 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2025-03-04 15:08:39,793 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 663 flow [2025-03-04 15:08:39,793 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) [2025-03-04 15:08:39,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:39,793 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-04 15:08:39,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-04 15:08:39,994 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 [2025-03-04 15:08:39,994 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:39,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:39,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1057783086, now seen corresponding path program 1 times [2025-03-04 15:08:39,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:39,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189562834] [2025-03-04 15:08:39,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:39,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:40,012 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-04 15:08:40,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 15:08:40,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:40,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 15:08:40,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:40,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189562834] [2025-03-04 15:08:40,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189562834] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:40,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:08:40,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 15:08:40,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309947119] [2025-03-04 15:08:40,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:40,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:08:40,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:40,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:08:40,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:08:40,165 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-04 15:08:40,165 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) [2025-03-04 15:08:40,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:40,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-04 15:08:40,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:40,587 INFO L124 PetriNetUnfolderBase]: 2926/5856 cut-off events. [2025-03-04 15:08:40,587 INFO L125 PetriNetUnfolderBase]: For 12713/12738 co-relation queries the response was YES. [2025-03-04 15:08:40,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18210 conditions, 5856 events. 2926/5856 cut-off events. For 12713/12738 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 36717 event pairs, 615 based on Foata normal form. 178/6034 useless extension candidates. Maximal degree in co-relation 15487. Up to 2981 conditions per place. [2025-03-04 15:08:40,619 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 107 selfloop transitions, 6 changer transitions 0/135 dead transitions. [2025-03-04 15:08:40,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 1215 flow [2025-03-04 15:08:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:08:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:08:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-03-04 15:08:40,620 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-04 15:08:40,620 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 663 flow. Second operand 4 states and 116 transitions. [2025-03-04 15:08:40,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 1215 flow [2025-03-04 15:08:40,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 1205 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 15:08:40,639 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 669 flow [2025-03-04 15:08:40,639 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} [2025-03-04 15:08:40,640 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2025-03-04 15:08:40,640 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 669 flow [2025-03-04 15:08:40,640 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) [2025-03-04 15:08:40,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:40,641 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] [2025-03-04 15:08:40,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-04 15:08:40,641 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:40,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:40,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1252979759, now seen corresponding path program 1 times [2025-03-04 15:08:40,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:40,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869802932] [2025-03-04 15:08:40,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:40,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:40,658 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-04 15:08:40,672 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-04 15:08:40,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:40,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:40,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:40,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869802932] [2025-03-04 15:08:40,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869802932] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:40,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:08:40,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 15:08:40,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248959709] [2025-03-04 15:08:40,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:40,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 15:08:40,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:40,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 15:08:40,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-04 15:08:40,794 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 15:08:40,794 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) [2025-03-04 15:08:40,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:40,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 15:08:40,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:41,274 INFO L124 PetriNetUnfolderBase]: 2862/5768 cut-off events. [2025-03-04 15:08:41,274 INFO L125 PetriNetUnfolderBase]: For 14681/14681 co-relation queries the response was YES. [2025-03-04 15:08:41,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18445 conditions, 5768 events. 2862/5768 cut-off events. For 14681/14681 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 36392 event pairs, 455 based on Foata normal form. 104/5871 useless extension candidates. Maximal degree in co-relation 15453. Up to 3054 conditions per place. [2025-03-04 15:08:41,304 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 85 selfloop transitions, 35 changer transitions 0/129 dead transitions. [2025-03-04 15:08:41,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 129 transitions, 1104 flow [2025-03-04 15:08:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-04 15:08:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-04 15:08:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2025-03-04 15:08:41,305 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2025-03-04 15:08:41,305 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 669 flow. Second operand 7 states and 162 transitions. [2025-03-04 15:08:41,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 129 transitions, 1104 flow [2025-03-04 15:08:41,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 129 transitions, 1080 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-04 15:08:41,323 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 752 flow [2025-03-04 15:08:41,323 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} [2025-03-04 15:08:41,323 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 47 predicate places. [2025-03-04 15:08:41,323 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 752 flow [2025-03-04 15:08:41,324 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) [2025-03-04 15:08:41,324 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:41,324 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] [2025-03-04 15:08:41,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-04 15:08:41,324 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:41,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:41,324 INFO L85 PathProgramCache]: Analyzing trace with hash 261151311, now seen corresponding path program 1 times [2025-03-04 15:08:41,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:41,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574903746] [2025-03-04 15:08:41,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:41,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:41,340 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-04 15:08:41,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-04 15:08:41,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:41,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:41,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:41,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574903746] [2025-03-04 15:08:41,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574903746] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:08:41,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:08:41,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-04 15:08:41,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277980312] [2025-03-04 15:08:41,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:08:41,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-04 15:08:41,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:41,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-04 15:08:41,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-04 15:08:41,518 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 15:08:41,518 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) [2025-03-04 15:08:41,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:41,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 15:08:41,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:42,033 INFO L124 PetriNetUnfolderBase]: 3126/6320 cut-off events. [2025-03-04 15:08:42,033 INFO L125 PetriNetUnfolderBase]: For 19709/19709 co-relation queries the response was YES. [2025-03-04 15:08:42,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20404 conditions, 6320 events. 3126/6320 cut-off events. For 19709/19709 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 40381 event pairs, 622 based on Foata normal form. 76/6395 useless extension candidates. Maximal degree in co-relation 17376. Up to 3339 conditions per place. [2025-03-04 15:08:42,064 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 132 selfloop transitions, 17 changer transitions 6/164 dead transitions. [2025-03-04 15:08:42,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 164 transitions, 1455 flow [2025-03-04 15:08:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 15:08:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-04 15:08:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2025-03-04 15:08:42,065 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5390625 [2025-03-04 15:08:42,067 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 752 flow. Second operand 8 states and 207 transitions. [2025-03-04 15:08:42,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 164 transitions, 1455 flow [2025-03-04 15:08:42,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 164 transitions, 1435 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-04 15:08:42,090 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 873 flow [2025-03-04 15:08:42,091 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} [2025-03-04 15:08:42,091 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 57 predicate places. [2025-03-04 15:08:42,091 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 873 flow [2025-03-04 15:08:42,091 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) [2025-03-04 15:08:42,091 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:42,091 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] [2025-03-04 15:08:42,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-04 15:08:42,091 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:42,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1647332108, now seen corresponding path program 1 times [2025-03-04 15:08:42,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:42,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330546427] [2025-03-04 15:08:42,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:42,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-04 15:08:42,122 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-04 15:08:42,122 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:42,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:42,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:42,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330546427] [2025-03-04 15:08:42,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330546427] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:08:42,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855478532] [2025-03-04 15:08:42,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:42,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:08:42,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:08:42,262 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) [2025-03-04 15:08:42,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 15:08:42,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-04 15:08:42,463 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-04 15:08:42,463 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:42,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:42,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 15:08:42,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:08:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:42,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:08:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:42,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855478532] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:08:42,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:08:42,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-03-04 15:08:42,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942614039] [2025-03-04 15:08:42,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:08:42,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-04 15:08:42,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:42,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-04 15:08:42,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2025-03-04 15:08:42,600 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 15:08:42,600 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) [2025-03-04 15:08:42,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:42,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 15:08:42,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:43,429 INFO L124 PetriNetUnfolderBase]: 3465/7039 cut-off events. [2025-03-04 15:08:43,429 INFO L125 PetriNetUnfolderBase]: For 25302/25302 co-relation queries the response was YES. [2025-03-04 15:08:43,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23120 conditions, 7039 events. 3465/7039 cut-off events. For 25302/25302 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 46552 event pairs, 609 based on Foata normal form. 176/7214 useless extension candidates. Maximal degree in co-relation 20228. Up to 1682 conditions per place. [2025-03-04 15:08:43,468 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 174 selfloop transitions, 58 changer transitions 18/259 dead transitions. [2025-03-04 15:08:43,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 259 transitions, 2200 flow [2025-03-04 15:08:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-04 15:08:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-04 15:08:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 426 transitions. [2025-03-04 15:08:43,470 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2025-03-04 15:08:43,470 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 873 flow. Second operand 18 states and 426 transitions. [2025-03-04 15:08:43,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 259 transitions, 2200 flow [2025-03-04 15:08:43,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 259 transitions, 2178 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-03-04 15:08:43,499 INFO L231 Difference]: Finished difference. Result has 118 places, 98 transitions, 1115 flow [2025-03-04 15:08:43,499 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} [2025-03-04 15:08:43,500 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 72 predicate places. [2025-03-04 15:08:43,500 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 98 transitions, 1115 flow [2025-03-04 15:08:43,500 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) [2025-03-04 15:08:43,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:43,500 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2025-03-04 15:08:43,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-04 15:08:43,700 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 [2025-03-04 15:08:43,701 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:43,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1970931189, now seen corresponding path program 2 times [2025-03-04 15:08:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:43,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379368090] [2025-03-04 15:08:43,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:08:43,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:43,721 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-04 15:08:43,749 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-04 15:08:43,750 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:08:43,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:43,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:43,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379368090] [2025-03-04 15:08:43,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379368090] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:08:43,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812740139] [2025-03-04 15:08:43,999 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:08:43,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:08:43,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:08:44,001 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) [2025-03-04 15:08:44,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 15:08:44,065 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-04 15:08:44,235 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 53 of 53 statements. [2025-03-04 15:08:44,235 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:08:44,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:44,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-04 15:08:44,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:08:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:44,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:08:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:44,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812740139] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:08:44,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:08:44,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2025-03-04 15:08:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464211136] [2025-03-04 15:08:44,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:08:44,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-04 15:08:44,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:44,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-04 15:08:44,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2025-03-04 15:08:44,422 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-04 15:08:44,423 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) [2025-03-04 15:08:44,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:44,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-04 15:08:44,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:46,019 INFO L124 PetriNetUnfolderBase]: 5099/10509 cut-off events. [2025-03-04 15:08:46,019 INFO L125 PetriNetUnfolderBase]: For 45598/45598 co-relation queries the response was YES. [2025-03-04 15:08:46,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36069 conditions, 10509 events. 5099/10509 cut-off events. For 45598/45598 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 64376 event pairs, 929 based on Foata normal form. 208/10716 useless extension candidates. Maximal degree in co-relation 29041. Up to 2336 conditions per place. [2025-03-04 15:08:46,106 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 349 selfloop transitions, 73 changer transitions 0/431 dead transitions. [2025-03-04 15:08:46,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 431 transitions, 4018 flow [2025-03-04 15:08:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-04 15:08:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-04 15:08:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 672 transitions. [2025-03-04 15:08:46,108 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-04 15:08:46,108 INFO L175 Difference]: Start difference. First operand has 118 places, 98 transitions, 1115 flow. Second operand 24 states and 672 transitions. [2025-03-04 15:08:46,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 431 transitions, 4018 flow [2025-03-04 15:08:46,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 431 transitions, 3818 flow, removed 66 selfloop flow, removed 7 redundant places. [2025-03-04 15:08:46,174 INFO L231 Difference]: Finished difference. Result has 138 places, 140 transitions, 1835 flow [2025-03-04 15:08:46,174 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} [2025-03-04 15:08:46,175 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 92 predicate places. [2025-03-04 15:08:46,175 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 140 transitions, 1835 flow [2025-03-04 15:08:46,175 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) [2025-03-04 15:08:46,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:46,175 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] [2025-03-04 15:08:46,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-04 15:08:46,375 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 [2025-03-04 15:08:46,376 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:46,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 527577453, now seen corresponding path program 2 times [2025-03-04 15:08:46,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:46,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414880959] [2025-03-04 15:08:46,376 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:08:46,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:46,399 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-04 15:08:46,490 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-04 15:08:46,490 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:08:46,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:46,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414880959] [2025-03-04 15:08:46,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414880959] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:08:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958248409] [2025-03-04 15:08:46,950 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:08:46,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:08:46,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:08:46,952 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) [2025-03-04 15:08:46,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 15:08:47,019 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-04 15:08:47,267 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-04 15:08:47,268 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:08:47,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:47,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 1947 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-04 15:08:47,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:08:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:47,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:08:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:47,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958248409] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:08:47,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:08:47,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2025-03-04 15:08:47,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370793931] [2025-03-04 15:08:47,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:08:47,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 15:08:47,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:47,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 15:08:47,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2025-03-04 15:08:47,447 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 15:08:47,448 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) [2025-03-04 15:08:47,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:47,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 15:08:47,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:48,748 INFO L124 PetriNetUnfolderBase]: 6158/12602 cut-off events. [2025-03-04 15:08:48,748 INFO L125 PetriNetUnfolderBase]: For 62164/62164 co-relation queries the response was YES. [2025-03-04 15:08:48,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43578 conditions, 12602 events. 6158/12602 cut-off events. For 62164/62164 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 80701 event pairs, 735 based on Foata normal form. 72/12673 useless extension candidates. Maximal degree in co-relation 40539. Up to 3367 conditions per place. [2025-03-04 15:08:48,839 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 259 selfloop transitions, 96 changer transitions 0/364 dead transitions. [2025-03-04 15:08:48,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 364 transitions, 3851 flow [2025-03-04 15:08:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-04 15:08:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-04 15:08:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 479 transitions. [2025-03-04 15:08:48,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49895833333333334 [2025-03-04 15:08:48,842 INFO L175 Difference]: Start difference. First operand has 138 places, 140 transitions, 1835 flow. Second operand 20 states and 479 transitions. [2025-03-04 15:08:48,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 364 transitions, 3851 flow [2025-03-04 15:08:48,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 364 transitions, 3705 flow, removed 23 selfloop flow, removed 9 redundant places. [2025-03-04 15:08:48,925 INFO L231 Difference]: Finished difference. Result has 155 places, 169 transitions, 2454 flow [2025-03-04 15:08:48,925 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} [2025-03-04 15:08:48,925 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 109 predicate places. [2025-03-04 15:08:48,925 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 169 transitions, 2454 flow [2025-03-04 15:08:48,925 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) [2025-03-04 15:08:48,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:48,925 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] [2025-03-04 15:08:48,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-04 15:08:49,126 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 [2025-03-04 15:08:49,126 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:49,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1358119671, now seen corresponding path program 3 times [2025-03-04 15:08:49,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:49,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125827550] [2025-03-04 15:08:49,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 15:08:49,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:49,149 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 4 equivalence classes. [2025-03-04 15:08:49,280 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 76 of 76 statements. [2025-03-04 15:08:49,282 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-04 15:08:49,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:49,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125827550] [2025-03-04 15:08:49,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125827550] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:08:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241125363] [2025-03-04 15:08:49,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 15:08:49,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:08:49,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:08:49,862 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) [2025-03-04 15:08:49,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 15:08:49,940 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 4 equivalence classes. [2025-03-04 15:08:50,506 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 76 of 76 statements. [2025-03-04 15:08:50,506 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-04 15:08:50,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:50,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 15:08:50,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:08:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:50,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:08:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:50,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241125363] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:08:50,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:08:50,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2025-03-04 15:08:50,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866377410] [2025-03-04 15:08:50,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:08:50,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-04 15:08:50,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:50,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-04 15:08:50,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2025-03-04 15:08:50,810 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 15:08:50,810 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) [2025-03-04 15:08:50,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:50,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 15:08:50,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:52,775 INFO L124 PetriNetUnfolderBase]: 7794/15854 cut-off events. [2025-03-04 15:08:52,775 INFO L125 PetriNetUnfolderBase]: For 97346/97346 co-relation queries the response was YES. [2025-03-04 15:08:52,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56389 conditions, 15854 events. 7794/15854 cut-off events. For 97346/97346 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 107329 event pairs, 785 based on Foata normal form. 120/15973 useless extension candidates. Maximal degree in co-relation 53274. Up to 2703 conditions per place. [2025-03-04 15:08:53,112 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 356 selfloop transitions, 167 changer transitions 0/532 dead transitions. [2025-03-04 15:08:53,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 532 transitions, 5711 flow [2025-03-04 15:08:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-04 15:08:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-03-04 15:08:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 742 transitions. [2025-03-04 15:08:53,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4986559139784946 [2025-03-04 15:08:53,114 INFO L175 Difference]: Start difference. First operand has 155 places, 169 transitions, 2454 flow. Second operand 31 states and 742 transitions. [2025-03-04 15:08:53,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 532 transitions, 5711 flow [2025-03-04 15:08:53,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 532 transitions, 5605 flow, removed 24 selfloop flow, removed 9 redundant places. [2025-03-04 15:08:53,256 INFO L231 Difference]: Finished difference. Result has 184 places, 222 transitions, 3646 flow [2025-03-04 15:08:53,257 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} [2025-03-04 15:08:53,257 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 138 predicate places. [2025-03-04 15:08:53,257 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 222 transitions, 3646 flow [2025-03-04 15:08:53,257 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) [2025-03-04 15:08:53,257 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:53,257 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] [2025-03-04 15:08:53,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-04 15:08:53,458 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 [2025-03-04 15:08:53,458 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:53,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1755879866, now seen corresponding path program 1 times [2025-03-04 15:08:53,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:53,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115274015] [2025-03-04 15:08:53,460 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:53,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:53,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-03-04 15:08:53,493 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-03-04 15:08:53,493 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:53,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 1 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-04 15:08:53,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115274015] [2025-03-04 15:08:53,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115274015] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:08:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15230824] [2025-03-04 15:08:53,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:08:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:08:53,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:08:53,820 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) [2025-03-04 15:08:53,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 15:08:53,902 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-03-04 15:08:54,074 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-03-04 15:08:54,074 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:08:54,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:54,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-04 15:08:54,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:08:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 1 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-04 15:08:54,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:08:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 1 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-04 15:08:54,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15230824] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:08:54,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:08:54,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2025-03-04 15:08:54,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293032169] [2025-03-04 15:08:54,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:08:54,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-04 15:08:54,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:08:54,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-04 15:08:54,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2025-03-04 15:08:54,356 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 15:08:54,356 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) [2025-03-04 15:08:54,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:08:54,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 15:08:54,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:08:57,322 INFO L124 PetriNetUnfolderBase]: 11256/22942 cut-off events. [2025-03-04 15:08:57,322 INFO L125 PetriNetUnfolderBase]: For 177176/177176 co-relation queries the response was YES. [2025-03-04 15:08:57,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84601 conditions, 22942 events. 11256/22942 cut-off events. For 177176/177176 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 169340 event pairs, 1201 based on Foata normal form. 220/23161 useless extension candidates. Maximal degree in co-relation 81590. Up to 3933 conditions per place. [2025-03-04 15:08:57,540 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 343 selfloop transitions, 277 changer transitions 0/629 dead transitions. [2025-03-04 15:08:57,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 629 transitions, 8284 flow [2025-03-04 15:08:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-04 15:08:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-03-04 15:08:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 738 transitions. [2025-03-04 15:08:57,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48046875 [2025-03-04 15:08:57,542 INFO L175 Difference]: Start difference. First operand has 184 places, 222 transitions, 3646 flow. Second operand 32 states and 738 transitions. [2025-03-04 15:08:57,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 629 transitions, 8284 flow [2025-03-04 15:08:57,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 629 transitions, 8030 flow, removed 87 selfloop flow, removed 10 redundant places. [2025-03-04 15:08:57,841 INFO L231 Difference]: Finished difference. Result has 212 places, 337 transitions, 6221 flow [2025-03-04 15:08:57,842 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} [2025-03-04 15:08:57,842 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 166 predicate places. [2025-03-04 15:08:57,842 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 337 transitions, 6221 flow [2025-03-04 15:08:57,842 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) [2025-03-04 15:08:57,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:08:57,842 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2025-03-04 15:08:57,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-04 15:08:58,042 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 [2025-03-04 15:08:58,043 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:08:58,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:08:58,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1991967339, now seen corresponding path program 3 times [2025-03-04 15:08:58,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:08:58,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803497745] [2025-03-04 15:08:58,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 15:08:58,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:08:58,065 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 119 statements into 11 equivalence classes. [2025-03-04 15:08:58,299 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 119 of 119 statements. [2025-03-04 15:08:58,299 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-04 15:08:58,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:08:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:08:59,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:08:59,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803497745] [2025-03-04 15:08:59,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803497745] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:08:59,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242314386] [2025-03-04 15:08:59,362 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 15:08:59,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:08:59,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:08:59,363 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) [2025-03-04 15:08:59,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 15:08:59,449 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 119 statements into 11 equivalence classes. [2025-03-04 15:09:00,662 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 119 of 119 statements. [2025-03-04 15:09:00,662 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-04 15:09:00,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:09:00,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 2286 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-04 15:09:00,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:09:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:09:00,766 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:09:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:09:01,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242314386] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:09:01,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:09:01,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 46 [2025-03-04 15:09:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002816879] [2025-03-04 15:09:01,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:09:01,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-04 15:09:01,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:09:01,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-04 15:09:01,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2025-03-04 15:09:01,175 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2025-03-04 15:09:01,176 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) [2025-03-04 15:09:01,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:09:01,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2025-03-04 15:09:01,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:09:06,741 INFO L124 PetriNetUnfolderBase]: 15536/31942 cut-off events. [2025-03-04 15:09:06,741 INFO L125 PetriNetUnfolderBase]: For 280382/280382 co-relation queries the response was YES. [2025-03-04 15:09:07,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118601 conditions, 31942 events. 15536/31942 cut-off events. For 280382/280382 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 222756 event pairs, 4023 based on Foata normal form. 468/32409 useless extension candidates. Maximal degree in co-relation 89070. Up to 11871 conditions per place. [2025-03-04 15:09:07,151 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 840 selfloop transitions, 188 changer transitions 0/1037 dead transitions. [2025-03-04 15:09:07,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1037 transitions, 12625 flow [2025-03-04 15:09:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-04 15:09:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-03-04 15:09:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1360 transitions. [2025-03-04 15:09:07,153 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2025-03-04 15:09:07,153 INFO L175 Difference]: Start difference. First operand has 212 places, 337 transitions, 6221 flow. Second operand 48 states and 1360 transitions. [2025-03-04 15:09:07,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 1037 transitions, 12625 flow [2025-03-04 15:09:07,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 1037 transitions, 12421 flow, removed 58 selfloop flow, removed 10 redundant places. [2025-03-04 15:09:07,779 INFO L231 Difference]: Finished difference. Result has 261 places, 413 transitions, 7931 flow [2025-03-04 15:09:07,780 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} [2025-03-04 15:09:07,780 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 215 predicate places. [2025-03-04 15:09:07,780 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 413 transitions, 7931 flow [2025-03-04 15:09:07,780 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) [2025-03-04 15:09:07,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:09:07,780 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] [2025-03-04 15:09:07,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-04 15:09:07,981 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 [2025-03-04 15:09:07,981 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:09:07,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:09:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1297207291, now seen corresponding path program 4 times [2025-03-04 15:09:07,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:09:07,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025435626] [2025-03-04 15:09:07,982 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 15:09:07,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:09:08,003 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 120 statements into 2 equivalence classes. [2025-03-04 15:09:08,062 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 120 of 120 statements. [2025-03-04 15:09:08,067 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 15:09:08,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:09:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:09:08,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:09:08,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025435626] [2025-03-04 15:09:08,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025435626] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:09:08,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486681948] [2025-03-04 15:09:08,763 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 15:09:08,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:09:08,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:09:08,768 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) [2025-03-04 15:09:08,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 15:09:08,959 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 120 statements into 2 equivalence classes. [2025-03-04 15:09:09,246 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 120 of 120 statements. [2025-03-04 15:09:09,247 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 15:09:09,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:09:09,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 2295 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-04 15:09:09,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:09:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:09:09,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:09:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:09:09,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486681948] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:09:09,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:09:09,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 40 [2025-03-04 15:09:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923367555] [2025-03-04 15:09:09,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:09:09,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-04 15:09:09,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:09:09,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-04 15:09:09,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1298, Unknown=0, NotChecked=0, Total=1722 [2025-03-04 15:09:09,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 15:09:09,995 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) [2025-03-04 15:09:09,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:09:09,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 15:09:09,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:09:19,179 INFO L124 PetriNetUnfolderBase]: 20947/42687 cut-off events. [2025-03-04 15:09:19,179 INFO L125 PetriNetUnfolderBase]: For 428780/428780 co-relation queries the response was YES. [2025-03-04 15:09:19,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160571 conditions, 42687 events. 20947/42687 cut-off events. For 428780/428780 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 312289 event pairs, 2343 based on Foata normal form. 228/42914 useless extension candidates. Maximal degree in co-relation 156996. Up to 7338 conditions per place. [2025-03-04 15:09:19,670 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 654 selfloop transitions, 469 changer transitions 0/1132 dead transitions. [2025-03-04 15:09:19,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1132 transitions, 15850 flow [2025-03-04 15:09:19,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-04 15:09:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2025-03-04 15:09:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 1248 transitions. [2025-03-04 15:09:19,672 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-04 15:09:19,672 INFO L175 Difference]: Start difference. First operand has 261 places, 413 transitions, 7931 flow. Second operand 52 states and 1248 transitions. [2025-03-04 15:09:19,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1132 transitions, 15850 flow [2025-03-04 15:09:20,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1132 transitions, 15313 flow, removed 115 selfloop flow, removed 17 redundant places. [2025-03-04 15:09:20,805 INFO L231 Difference]: Finished difference. Result has 318 places, 576 transitions, 12132 flow [2025-03-04 15:09:20,806 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} [2025-03-04 15:09:20,806 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 272 predicate places. [2025-03-04 15:09:20,806 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 576 transitions, 12132 flow [2025-03-04 15:09:20,807 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) [2025-03-04 15:09:20,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:09:20,807 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] [2025-03-04 15:09:20,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-04 15:09:21,007 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 [2025-03-04 15:09:21,007 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:09:21,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:09:21,008 INFO L85 PathProgramCache]: Analyzing trace with hash -659457459, now seen corresponding path program 2 times [2025-03-04 15:09:21,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:09:21,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148084475] [2025-03-04 15:09:21,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:09:21,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:09:21,031 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-03-04 15:09:21,194 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-03-04 15:09:21,194 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:09:21,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:09:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-04 15:09:21,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:09:21,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148084475] [2025-03-04 15:09:21,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148084475] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:09:21,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676779602] [2025-03-04 15:09:21,774 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:09:21,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:09:21,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:09:21,776 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) [2025-03-04 15:09:21,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 15:09:21,874 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-03-04 15:09:22,073 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-03-04 15:09:22,073 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:09:22,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:09:22,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 2288 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-04 15:09:22,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:09:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-04 15:09:22,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:09:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-04 15:09:22,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676779602] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:09:22,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:09:22,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2025-03-04 15:09:22,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061116463] [2025-03-04 15:09:22,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:09:22,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-04 15:09:22,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:09:22,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-04 15:09:22,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2025-03-04 15:09:22,517 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-04 15:09:22,517 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) [2025-03-04 15:09:22,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:09:22,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-04 15:09:22,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:09:36,081 INFO L124 PetriNetUnfolderBase]: 27341/55797 cut-off events. [2025-03-04 15:09:36,081 INFO L125 PetriNetUnfolderBase]: For 649068/649068 co-relation queries the response was YES. [2025-03-04 15:09:36,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217790 conditions, 55797 events. 27341/55797 cut-off events. For 649068/649068 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 436612 event pairs, 2999 based on Foata normal form. 284/56080 useless extension candidates. Maximal degree in co-relation 214158. Up to 9620 conditions per place. [2025-03-04 15:09:37,114 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 576 selfloop transitions, 652 changer transitions 0/1237 dead transitions. [2025-03-04 15:09:37,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1237 transitions, 21363 flow [2025-03-04 15:09:37,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-04 15:09:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-03-04 15:09:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 1043 transitions. [2025-03-04 15:09:37,116 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49384469696969696 [2025-03-04 15:09:37,116 INFO L175 Difference]: Start difference. First operand has 318 places, 576 transitions, 12132 flow. Second operand 44 states and 1043 transitions. [2025-03-04 15:09:37,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1237 transitions, 21363 flow [2025-03-04 15:09:39,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1237 transitions, 20943 flow, removed 184 selfloop flow, removed 7 redundant places. [2025-03-04 15:09:39,892 INFO L231 Difference]: Finished difference. Result has 371 places, 795 transitions, 18508 flow [2025-03-04 15:09:39,893 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} [2025-03-04 15:09:39,893 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 325 predicate places. [2025-03-04 15:09:39,893 INFO L471 AbstractCegarLoop]: Abstraction has has 371 places, 795 transitions, 18508 flow [2025-03-04 15:09:39,893 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) [2025-03-04 15:09:39,893 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:09:39,894 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] [2025-03-04 15:09:39,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-04 15:09:40,094 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 [2025-03-04 15:09:40,094 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2025-03-04 15:09:40,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:09:40,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1927923354, now seen corresponding path program 3 times [2025-03-04 15:09:40,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:09:40,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272290818] [2025-03-04 15:09:40,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 15:09:40,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:09:40,123 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 133 statements into 8 equivalence classes. [2025-03-04 15:09:40,479 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 133 of 133 statements. [2025-03-04 15:09:40,479 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-04 15:09:40,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:09:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 2 proven. 244 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-04 15:09:41,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:09:41,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272290818] [2025-03-04 15:09:41,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272290818] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:09:41,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968467083] [2025-03-04 15:09:41,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 15:09:41,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:09:41,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:09:41,250 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) [2025-03-04 15:09:41,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 15:09:41,371 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 133 statements into 8 equivalence classes.