./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/stack_longest-2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:15:04,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:15:04,872 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:15:04,878 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:15:04,879 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:15:04,900 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:15:04,901 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:15:04,901 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:15:04,902 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:15:04,902 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:15:04,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:15:04,902 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:15:04,902 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:15:04,902 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:15:04,903 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:15:04,903 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:15:04,903 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:15:04,903 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:15:04,903 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:15:04,903 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:15:04,903 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:15:04,903 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:15:04,903 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:15:04,903 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:15:04,903 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:15:04,903 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:15:04,904 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:15:04,904 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:15:04,904 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:15:04,904 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:15:04,904 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:15:04,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:15:04,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:15:04,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:15:04,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:15:04,904 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:15:04,904 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:15:04,904 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:15:04,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:15:04,905 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:15:04,905 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:15:04,905 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:15:04,905 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:15:04,905 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-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2025-02-06 04:15:05,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:15:05,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:15:05,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:15:05,126 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:15:05,126 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:15:05,127 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longest-2.i [2025-02-06 04:15:06,324 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ba4fb63fa/6604d16ba5284ad38e4d8c0dbf775c71/FLAGbf3fdadd4 [2025-02-06 04:15:06,560 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:15:06,560 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i [2025-02-06 04:15:06,576 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ba4fb63fa/6604d16ba5284ad38e4d8c0dbf775c71/FLAGbf3fdadd4 [2025-02-06 04:15:06,873 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ba4fb63fa/6604d16ba5284ad38e4d8c0dbf775c71 [2025-02-06 04:15:06,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:15:06,876 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:15:06,877 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:15:06,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:15:06,881 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:15:06,882 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:15:06" (1/1) ... [2025-02-06 04:15:06,883 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd575fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:06, skipping insertion in model container [2025-02-06 04:15:06,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:15:06" (1/1) ... [2025-02-06 04:15:06,911 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:15:07,236 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2025-02-06 04:15:07,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:15:07,291 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:15:07,333 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2025-02-06 04:15:07,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:15:07,423 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:15:07,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07 WrapperNode [2025-02-06 04:15:07,424 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:15:07,425 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:15:07,426 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:15:07,426 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:15:07,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,451 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,502 INFO L138 Inliner]: procedures = 277, calls = 830, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 939 [2025-02-06 04:15:07,502 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:15:07,503 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:15:07,503 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:15:07,503 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:15:07,511 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,519 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,552 INFO L175 MemorySlicer]: Split 809 memory accesses to 3 slices as follows [2, 802, 5]. 99 percent of accesses are in the largest equivalence class. The 807 initializations are split as follows [2, 800, 5]. The 1 writes are split as follows [0, 1, 0]. [2025-02-06 04:15:07,556 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,556 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,576 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,580 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,588 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:15:07,598 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:15:07,598 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:15:07,598 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:15:07,599 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (1/1) ... [2025-02-06 04:15:07,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:15:07,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:15:07,629 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 04:15:07,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 04:15:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-02-06 04:15:07,647 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-02-06 04:15:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-02-06 04:15:07,647 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-02-06 04:15:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-02-06 04:15:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 04:15:07,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 04:15:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-06 04:15:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 04:15:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 04:15:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-06 04:15:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-02-06 04:15:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:15:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:15:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 04:15:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-06 04:15:07,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:15:07,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:15:07,650 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:15:07,753 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:15:07,757 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:15:08,741 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L985-1: pop_#res#1 := 0; [2025-02-06 04:15:08,741 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L983: havoc pop_#t~mem37#1; [2025-02-06 04:15:08,741 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L983-1: havoc pop_#t~ret36#1; [2025-02-06 04:15:08,742 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:15:08,742 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:15:18,452 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:15:18,452 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:15:18,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:15:18 BoogieIcfgContainer [2025-02-06 04:15:18,452 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:15:18,454 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:15:18,454 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:15:18,457 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:15:18,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:15:06" (1/3) ... [2025-02-06 04:15:18,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd0965a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:15:18, skipping insertion in model container [2025-02-06 04:15:18,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:15:07" (2/3) ... [2025-02-06 04:15:18,459 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd0965a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:15:18, skipping insertion in model container [2025-02-06 04:15:18,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:15:18" (3/3) ... [2025-02-06 04:15:18,460 INFO L128 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2025-02-06 04:15:18,472 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:15:18,473 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stack_longest-2.i that has 3 procedures, 30 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-02-06 04:15:18,474 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:15:18,537 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 04:15:18,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2025-02-06 04:15:18,612 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-02-06 04:15:18,615 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:15:18,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 65 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2025-02-06 04:15:18,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2025-02-06 04:15:18,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2025-02-06 04:15:18,628 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:15:18,639 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;@2b5f12d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:15:18,641 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-02-06 04:15:18,665 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:15:18,665 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2025-02-06 04:15:18,665 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-02-06 04:15:18,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:15:18,666 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:15:18,666 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:15:18,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:15:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash 508089198, now seen corresponding path program 1 times [2025-02-06 04:15:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:15:18,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388951006] [2025-02-06 04:15:18,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:18,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:15:18,771 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 04:15:18,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 04:15:18,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:18,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:19,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:15:19,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388951006] [2025-02-06 04:15:19,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388951006] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:15:19,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:15:19,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:15:19,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626097437] [2025-02-06 04:15:19,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:15:19,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:15:19,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:15:19,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:15:19,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:15:19,387 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-06 04:15:19,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2025-02-06 04:15:19,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:15:19,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-06 04:15:19,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:15:19,604 INFO L124 PetriNetUnfolderBase]: 307/564 cut-off events. [2025-02-06 04:15:19,604 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-02-06 04:15:19,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 564 events. 307/564 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2480 event pairs, 53 based on Foata normal form. 40/558 useless extension candidates. Maximal degree in co-relation 1043. Up to 358 conditions per place. [2025-02-06 04:15:19,612 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2025-02-06 04:15:19,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 214 flow [2025-02-06 04:15:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:15:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:15:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2025-02-06 04:15:19,622 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2025-02-06 04:15:19,623 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 4 states and 83 transitions. [2025-02-06 04:15:19,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 214 flow [2025-02-06 04:15:19,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 04:15:19,632 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2025-02-06 04:15:19,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2025-02-06 04:15:19,636 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2025-02-06 04:15:19,637 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2025-02-06 04:15:19,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2025-02-06 04:15:19,637 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:15:19,637 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:15:19,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:15:19,638 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:15:19,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:15:19,639 INFO L85 PathProgramCache]: Analyzing trace with hash -230219223, now seen corresponding path program 1 times [2025-02-06 04:15:19,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:15:19,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743078925] [2025-02-06 04:15:19,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:19,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:15:19,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 04:15:19,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:15:19,709 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:19,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:20,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:15:20,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743078925] [2025-02-06 04:15:20,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743078925] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:15:20,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708048913] [2025-02-06 04:15:20,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:20,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:15:20,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:15:20,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:15:20,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 04:15:20,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 04:15:20,536 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:15:20,536 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:20,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:20,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-06 04:15:20,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:15:20,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:20,673 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:15:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:20,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708048913] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:15:20,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:15:20,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-02-06 04:15:20,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829661882] [2025-02-06 04:15:20,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:15:20,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 04:15:20,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:15:20,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 04:15:20,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-02-06 04:15:20,758 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-06 04:15:20,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 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) [2025-02-06 04:15:20,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:15:20,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-06 04:15:20,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:15:21,339 INFO L124 PetriNetUnfolderBase]: 1257/2332 cut-off events. [2025-02-06 04:15:21,340 INFO L125 PetriNetUnfolderBase]: For 297/299 co-relation queries the response was YES. [2025-02-06 04:15:21,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 2332 events. 1257/2332 cut-off events. For 297/299 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12412 event pairs, 153 based on Foata normal form. 48/2272 useless extension candidates. Maximal degree in co-relation 4362. Up to 365 conditions per place. [2025-02-06 04:15:21,353 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 163 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2025-02-06 04:15:21,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 204 transitions, 900 flow [2025-02-06 04:15:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 04:15:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-02-06 04:15:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 313 transitions. [2025-02-06 04:15:21,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2025-02-06 04:15:21,356 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 15 states and 313 transitions. [2025-02-06 04:15:21,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 204 transitions, 900 flow [2025-02-06 04:15:21,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 204 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:15:21,360 INFO L231 Difference]: Finished difference. Result has 54 places, 66 transitions, 329 flow [2025-02-06 04:15:21,360 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=329, PETRI_PLACES=54, PETRI_TRANSITIONS=66} [2025-02-06 04:15:21,361 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2025-02-06 04:15:21,362 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 66 transitions, 329 flow [2025-02-06 04:15:21,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 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) [2025-02-06 04:15:21,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:15:21,362 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:15:21,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 04:15:21,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:15:21,567 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:15:21,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:15:21,567 INFO L85 PathProgramCache]: Analyzing trace with hash 125648614, now seen corresponding path program 1 times [2025-02-06 04:15:21,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:15:21,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017508556] [2025-02-06 04:15:21,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:21,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:15:21,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:15:21,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:15:21,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:21,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:21,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:15:21,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017508556] [2025-02-06 04:15:21,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017508556] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:15:21,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:15:21,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:15:21,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052137839] [2025-02-06 04:15:21,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:15:21,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:15:21,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:15:21,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:15:21,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:15:21,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-06 04:15:21,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 66 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2025-02-06 04:15:21,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:15:21,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-06 04:15:21,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:15:22,085 INFO L124 PetriNetUnfolderBase]: 669/1351 cut-off events. [2025-02-06 04:15:22,085 INFO L125 PetriNetUnfolderBase]: For 601/601 co-relation queries the response was YES. [2025-02-06 04:15:22,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3062 conditions, 1351 events. 669/1351 cut-off events. For 601/601 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6860 event pairs, 231 based on Foata normal form. 66/1398 useless extension candidates. Maximal degree in co-relation 2914. Up to 634 conditions per place. [2025-02-06 04:15:22,092 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 43 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2025-02-06 04:15:22,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 339 flow [2025-02-06 04:15:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:15:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:15:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-02-06 04:15:22,093 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2025-02-06 04:15:22,093 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 329 flow. Second operand 3 states and 58 transitions. [2025-02-06 04:15:22,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 339 flow [2025-02-06 04:15:22,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 307 flow, removed 16 selfloop flow, removed 3 redundant places. [2025-02-06 04:15:22,102 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 198 flow [2025-02-06 04:15:22,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2025-02-06 04:15:22,104 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2025-02-06 04:15:22,104 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 198 flow [2025-02-06 04:15:22,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2025-02-06 04:15:22,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:15:22,104 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:15:22,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 04:15:22,105 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:15:22,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:15:22,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1126863847, now seen corresponding path program 1 times [2025-02-06 04:15:22,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:15:22,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517600898] [2025-02-06 04:15:22,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:22,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:15:22,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-02-06 04:15:22,196 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:15:22,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:22,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:23,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:15:23,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517600898] [2025-02-06 04:15:23,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517600898] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:15:23,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:15:23,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:15:23,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639103500] [2025-02-06 04:15:23,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:15:23,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:15:23,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:15:23,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:15:23,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:15:23,499 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-02-06 04:15:23,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2025-02-06 04:15:23,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:15:23,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-02-06 04:15:23,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:15:23,747 INFO L124 PetriNetUnfolderBase]: 840/1690 cut-off events. [2025-02-06 04:15:23,748 INFO L125 PetriNetUnfolderBase]: For 581/581 co-relation queries the response was YES. [2025-02-06 04:15:23,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3871 conditions, 1690 events. 840/1690 cut-off events. For 581/581 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8849 event pairs, 260 based on Foata normal form. 0/1665 useless extension candidates. Maximal degree in co-relation 3491. Up to 971 conditions per place. [2025-02-06 04:15:23,757 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 61 selfloop transitions, 7 changer transitions 4/84 dead transitions. [2025-02-06 04:15:23,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 451 flow [2025-02-06 04:15:23,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:15:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:15:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2025-02-06 04:15:23,759 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5705882352941176 [2025-02-06 04:15:23,759 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 198 flow. Second operand 5 states and 97 transitions. [2025-02-06 04:15:23,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 451 flow [2025-02-06 04:15:23,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:15:23,765 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 254 flow [2025-02-06 04:15:23,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2025-02-06 04:15:23,766 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2025-02-06 04:15:23,766 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 254 flow [2025-02-06 04:15:23,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2025-02-06 04:15:23,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:15:23,767 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:15:23,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:15:23,767 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:15:23,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:15:23,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1151216230, now seen corresponding path program 1 times [2025-02-06 04:15:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:15:23,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349305485] [2025-02-06 04:15:23,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:23,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:15:23,796 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 04:15:23,836 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:15:23,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:23,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:24,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:15:24,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349305485] [2025-02-06 04:15:24,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349305485] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:15:24,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339667474] [2025-02-06 04:15:24,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:24,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:15:24,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:15:24,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:15:24,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 04:15:24,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-06 04:15:25,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:15:25,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:25,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:25,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 04:15:25,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:15:25,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:25,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2025-02-06 04:15:25,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2025-02-06 04:15:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:25,418 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:15:25,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2025-02-06 04:15:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:25,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339667474] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:15:25,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:15:25,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-02-06 04:15:25,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654364518] [2025-02-06 04:15:25,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:15:25,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 04:15:25,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:15:25,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 04:15:25,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-02-06 04:15:25,778 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-06 04:15:25,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 254 flow. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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) [2025-02-06 04:15:25,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:15:25,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-06 04:15:25,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:15:26,904 INFO L124 PetriNetUnfolderBase]: 1808/3586 cut-off events. [2025-02-06 04:15:26,904 INFO L125 PetriNetUnfolderBase]: For 1672/1672 co-relation queries the response was YES. [2025-02-06 04:15:26,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8171 conditions, 3586 events. 1808/3586 cut-off events. For 1672/1672 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 19695 event pairs, 357 based on Foata normal form. 14/3530 useless extension candidates. Maximal degree in co-relation 7086. Up to 587 conditions per place. [2025-02-06 04:15:26,926 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 204 selfloop transitions, 54 changer transitions 20/283 dead transitions. [2025-02-06 04:15:26,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 283 transitions, 1528 flow [2025-02-06 04:15:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-06 04:15:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-02-06 04:15:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 426 transitions. [2025-02-06 04:15:26,928 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5447570332480819 [2025-02-06 04:15:26,928 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 254 flow. Second operand 23 states and 426 transitions. [2025-02-06 04:15:26,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 283 transitions, 1528 flow [2025-02-06 04:15:26,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 283 transitions, 1518 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-02-06 04:15:26,941 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 560 flow [2025-02-06 04:15:26,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=560, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2025-02-06 04:15:26,943 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 51 predicate places. [2025-02-06 04:15:26,943 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 560 flow [2025-02-06 04:15:26,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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) [2025-02-06 04:15:26,943 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:15:26,943 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:15:26,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 04:15:27,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:15:27,144 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:15:27,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:15:27,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1059136057, now seen corresponding path program 1 times [2025-02-06 04:15:27,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:15:27,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599711118] [2025-02-06 04:15:27,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:27,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:15:27,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 04:15:27,190 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:15:27,191 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:27,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:27,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:15:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599711118] [2025-02-06 04:15:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599711118] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:15:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662687124] [2025-02-06 04:15:27,618 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:27,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:15:27,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:15:27,620 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:15:27,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 04:15:27,700 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 04:15:28,040 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 04:15:28,040 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:28,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:28,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 04:15:28,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:15:28,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:28,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:28,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:15:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:15:28,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662687124] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 04:15:28,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-06 04:15:28,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2025-02-06 04:15:28,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387678272] [2025-02-06 04:15:28,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:15:28,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:15:28,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:15:28,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:15:28,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-02-06 04:15:28,277 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-06 04:15:28,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 560 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2025-02-06 04:15:28,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:15:28,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-06 04:15:28,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:15:28,657 INFO L124 PetriNetUnfolderBase]: 2176/4340 cut-off events. [2025-02-06 04:15:28,657 INFO L125 PetriNetUnfolderBase]: For 3920/3920 co-relation queries the response was YES. [2025-02-06 04:15:28,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10441 conditions, 4340 events. 2176/4340 cut-off events. For 3920/3920 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 25170 event pairs, 463 based on Foata normal form. 24/4329 useless extension candidates. Maximal degree in co-relation 10077. Up to 1663 conditions per place. [2025-02-06 04:15:28,678 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 82 selfloop transitions, 52 changer transitions 2/141 dead transitions. [2025-02-06 04:15:28,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 141 transitions, 1028 flow [2025-02-06 04:15:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:15:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:15:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2025-02-06 04:15:28,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2025-02-06 04:15:28,679 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 560 flow. Second operand 6 states and 112 transitions. [2025-02-06 04:15:28,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 141 transitions, 1028 flow [2025-02-06 04:15:28,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 141 transitions, 998 flow, removed 15 selfloop flow, removed 0 redundant places. [2025-02-06 04:15:28,692 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 779 flow [2025-02-06 04:15:28,692 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2025-02-06 04:15:28,693 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 58 predicate places. [2025-02-06 04:15:28,693 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 779 flow [2025-02-06 04:15:28,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2025-02-06 04:15:28,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:15:28,693 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:15:28,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 04:15:28,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:15:28,894 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:15:28,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:15:28,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1511358174, now seen corresponding path program 1 times [2025-02-06 04:15:28,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:15:28,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160044578] [2025-02-06 04:15:28,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:28,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:15:28,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 04:15:28,980 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 04:15:28,981 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:28,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:29,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:15:29,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160044578] [2025-02-06 04:15:29,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160044578] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:15:29,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878602039] [2025-02-06 04:15:29,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:29,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:15:29,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:15:29,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:15:29,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 04:15:29,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-06 04:15:30,137 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-06 04:15:30,138 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:30,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:30,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 04:15:30,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:15:30,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-02-06 04:15:30,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 19 [2025-02-06 04:15:30,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2025-02-06 04:15:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:30,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:15:30,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:15:30,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2025-02-06 04:15:30,774 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2025-02-06 04:15:30,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 63 [2025-02-06 04:15:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:30,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878602039] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:15:30,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:15:30,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-02-06 04:15:30,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433034676] [2025-02-06 04:15:30,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:15:30,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-06 04:15:30,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:15:30,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-06 04:15:30,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2025-02-06 04:15:30,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-06 04:15:30,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 779 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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) [2025-02-06 04:15:30,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:15:30,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-06 04:15:30,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:15:32,568 INFO L124 PetriNetUnfolderBase]: 3487/6913 cut-off events. [2025-02-06 04:15:32,568 INFO L125 PetriNetUnfolderBase]: For 10018/10018 co-relation queries the response was YES. [2025-02-06 04:15:32,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17510 conditions, 6913 events. 3487/6913 cut-off events. For 10018/10018 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 41135 event pairs, 800 based on Foata normal form. 49/6927 useless extension candidates. Maximal degree in co-relation 16660. Up to 1145 conditions per place. [2025-02-06 04:15:32,617 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 224 selfloop transitions, 106 changer transitions 36/371 dead transitions. [2025-02-06 04:15:32,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 371 transitions, 2655 flow [2025-02-06 04:15:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-06 04:15:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-02-06 04:15:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 450 transitions. [2025-02-06 04:15:32,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2025-02-06 04:15:32,619 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 779 flow. Second operand 25 states and 450 transitions. [2025-02-06 04:15:32,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 371 transitions, 2655 flow [2025-02-06 04:15:32,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 371 transitions, 2572 flow, removed 30 selfloop flow, removed 1 redundant places. [2025-02-06 04:15:32,653 INFO L231 Difference]: Finished difference. Result has 124 places, 152 transitions, 1504 flow [2025-02-06 04:15:32,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1504, PETRI_PLACES=124, PETRI_TRANSITIONS=152} [2025-02-06 04:15:32,654 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 92 predicate places. [2025-02-06 04:15:32,654 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 152 transitions, 1504 flow [2025-02-06 04:15:32,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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) [2025-02-06 04:15:32,654 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:15:32,654 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2025-02-06 04:15:32,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 04:15:32,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-06 04:15:32,855 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:15:32,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:15:32,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1013677274, now seen corresponding path program 2 times [2025-02-06 04:15:32,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:15:32,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146070890] [2025-02-06 04:15:32,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:15:32,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:15:32,888 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-06 04:15:32,925 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:15:32,925 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:15:32,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:33,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:15:33,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146070890] [2025-02-06 04:15:33,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146070890] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:15:33,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932072653] [2025-02-06 04:15:33,443 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:15:33,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:15:33,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:15:33,445 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:15:33,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 04:15:33,529 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-06 04:15:33,688 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 04:15:33,688 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:15:33,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:33,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 04:15:33,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:15:33,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:33,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:33,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:33,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:33,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:15:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:34,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932072653] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:15:34,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:15:34,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 25 [2025-02-06 04:15:34,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359734917] [2025-02-06 04:15:34,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:15:34,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 04:15:34,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:15:34,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 04:15:34,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2025-02-06 04:15:34,038 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-06 04:15:34,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 152 transitions, 1504 flow. Second operand has 26 states, 26 states have (on average 9.923076923076923) internal successors, (258), 26 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:15:34,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:15:34,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-06 04:15:34,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:15:36,572 INFO L124 PetriNetUnfolderBase]: 10039/19569 cut-off events. [2025-02-06 04:15:36,572 INFO L125 PetriNetUnfolderBase]: For 52985/52985 co-relation queries the response was YES. [2025-02-06 04:15:36,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55366 conditions, 19569 events. 10039/19569 cut-off events. For 52985/52985 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 139845 event pairs, 1798 based on Foata normal form. 314/19876 useless extension candidates. Maximal degree in co-relation 53411. Up to 3240 conditions per place. [2025-02-06 04:15:36,784 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 563 selfloop transitions, 352 changer transitions 20/940 dead transitions. [2025-02-06 04:15:36,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 940 transitions, 8217 flow [2025-02-06 04:15:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-02-06 04:15:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2025-02-06 04:15:36,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1074 transitions. [2025-02-06 04:15:36,787 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5264705882352941 [2025-02-06 04:15:36,787 INFO L175 Difference]: Start difference. First operand has 124 places, 152 transitions, 1504 flow. Second operand 60 states and 1074 transitions. [2025-02-06 04:15:36,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 940 transitions, 8217 flow [2025-02-06 04:15:37,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 940 transitions, 8017 flow, removed 80 selfloop flow, removed 6 redundant places. [2025-02-06 04:15:37,033 INFO L231 Difference]: Finished difference. Result has 193 places, 425 transitions, 5306 flow [2025-02-06 04:15:37,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=5306, PETRI_PLACES=193, PETRI_TRANSITIONS=425} [2025-02-06 04:15:37,034 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 161 predicate places. [2025-02-06 04:15:37,034 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 425 transitions, 5306 flow [2025-02-06 04:15:37,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.923076923076923) internal successors, (258), 26 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:15:37,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:15:37,035 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:15:37,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 04:15:37,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:15:37,235 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:15:37,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:15:37,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1157296589, now seen corresponding path program 2 times [2025-02-06 04:15:37,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:15:37,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745295191] [2025-02-06 04:15:37,236 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:15:37,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:15:37,255 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-02-06 04:15:37,456 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 04:15:37,459 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:15:37,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:39,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:15:39,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745295191] [2025-02-06 04:15:39,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745295191] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:15:39,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889794248] [2025-02-06 04:15:39,829 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:15:39,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:15:39,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:15:39,842 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:15:39,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 04:15:39,965 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-02-06 04:15:40,156 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-02-06 04:15:40,156 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:15:40,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:40,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-06 04:15:40,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:15:40,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-06 04:15:40,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2025-02-06 04:15:40,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2025-02-06 04:15:40,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 04:15:40,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 38 [2025-02-06 04:15:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:40,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:15:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:41,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889794248] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:15:41,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:15:41,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-02-06 04:15:41,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175670715] [2025-02-06 04:15:41,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:15:41,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 04:15:41,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:15:41,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 04:15:41,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2025-02-06 04:15:41,097 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-06 04:15:41,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 425 transitions, 5306 flow. Second operand has 25 states, 25 states have (on average 10.96) internal successors, (274), 25 states have internal predecessors, (274), 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) [2025-02-06 04:15:41,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:15:41,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-06 04:15:41,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:15:48,163 INFO L124 PetriNetUnfolderBase]: 21544/41751 cut-off events. [2025-02-06 04:15:48,163 INFO L125 PetriNetUnfolderBase]: For 179290/179290 co-relation queries the response was YES. [2025-02-06 04:15:48,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126896 conditions, 41751 events. 21544/41751 cut-off events. For 179290/179290 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 330882 event pairs, 3895 based on Foata normal form. 406/42150 useless extension candidates. Maximal degree in co-relation 124741. Up to 9260 conditions per place. [2025-02-06 04:15:48,685 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 529 selfloop transitions, 658 changer transitions 34/1226 dead transitions. [2025-02-06 04:15:48,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 1226 transitions, 15489 flow [2025-02-06 04:15:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-02-06 04:15:48,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-02-06 04:15:48,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 640 transitions. [2025-02-06 04:15:48,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5087440381558028 [2025-02-06 04:15:48,689 INFO L175 Difference]: Start difference. First operand has 193 places, 425 transitions, 5306 flow. Second operand 37 states and 640 transitions. [2025-02-06 04:15:48,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 1226 transitions, 15489 flow [2025-02-06 04:15:49,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 1226 transitions, 14063 flow, removed 713 selfloop flow, removed 0 redundant places. [2025-02-06 04:15:49,820 INFO L231 Difference]: Finished difference. Result has 257 places, 875 transitions, 12645 flow [2025-02-06 04:15:49,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4720, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=12645, PETRI_PLACES=257, PETRI_TRANSITIONS=875} [2025-02-06 04:15:49,821 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 225 predicate places. [2025-02-06 04:15:49,821 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 875 transitions, 12645 flow [2025-02-06 04:15:49,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.96) internal successors, (274), 25 states have internal predecessors, (274), 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) [2025-02-06 04:15:49,821 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:15:49,821 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:15:49,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 04:15:50,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-06 04:15:50,022 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:15:50,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:15:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1442316146, now seen corresponding path program 1 times [2025-02-06 04:15:50,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:15:50,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082432050] [2025-02-06 04:15:50,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:50,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:15:50,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-02-06 04:15:50,059 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-02-06 04:15:50,059 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:50,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 7 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:15:50,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:15:50,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082432050] [2025-02-06 04:15:50,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082432050] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:15:50,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208134132] [2025-02-06 04:15:50,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:15:50,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:15:50,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:15:50,754 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:15:50,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 04:15:50,842 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-02-06 04:15:50,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-02-06 04:15:50,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:15:50,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:15:50,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-06 04:15:50,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:15:51,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:51,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:51,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:51,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:51,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-06 04:15:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:15:51,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:15:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 37 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-06 04:15:51,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208134132] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:15:51,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:15:51,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 20 [2025-02-06 04:15:51,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070967739] [2025-02-06 04:15:51,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:15:51,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 04:15:51,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:15:51,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 04:15:51,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2025-02-06 04:15:51,331 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-06 04:15:51,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 875 transitions, 12645 flow. Second operand has 20 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 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) [2025-02-06 04:15:51,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:15:51,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-06 04:15:51,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:16:06,409 INFO L124 PetriNetUnfolderBase]: 36737/71426 cut-off events. [2025-02-06 04:16:06,409 INFO L125 PetriNetUnfolderBase]: For 533099/533099 co-relation queries the response was YES. [2025-02-06 04:16:07,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234294 conditions, 71426 events. 36737/71426 cut-off events. For 533099/533099 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 598899 event pairs, 4447 based on Foata normal form. 501/71908 useless extension candidates. Maximal degree in co-relation 232164. Up to 11937 conditions per place. [2025-02-06 04:16:07,977 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 702 selfloop transitions, 1398 changer transitions 30/2135 dead transitions. [2025-02-06 04:16:07,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 2135 transitions, 28898 flow [2025-02-06 04:16:07,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2025-02-06 04:16:07,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2025-02-06 04:16:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1142 transitions. [2025-02-06 04:16:07,981 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5167420814479639 [2025-02-06 04:16:07,981 INFO L175 Difference]: Start difference. First operand has 257 places, 875 transitions, 12645 flow. Second operand 65 states and 1142 transitions. [2025-02-06 04:16:07,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 2135 transitions, 28898 flow [2025-02-06 04:16:15,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 2135 transitions, 27855 flow, removed 513 selfloop flow, removed 3 redundant places. [2025-02-06 04:16:15,082 INFO L231 Difference]: Finished difference. Result has 330 places, 1551 transitions, 24479 flow [2025-02-06 04:16:15,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=12225, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=762, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=24479, PETRI_PLACES=330, PETRI_TRANSITIONS=1551} [2025-02-06 04:16:15,084 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 298 predicate places. [2025-02-06 04:16:15,084 INFO L471 AbstractCegarLoop]: Abstraction has has 330 places, 1551 transitions, 24479 flow [2025-02-06 04:16:15,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 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) [2025-02-06 04:16:15,084 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:16:15,084 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:16:15,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 04:16:15,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:16:15,285 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:16:15,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:16:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1992031106, now seen corresponding path program 3 times [2025-02-06 04:16:15,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:16:15,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104533961] [2025-02-06 04:16:15,285 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:16:15,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:16:15,316 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-02-06 04:16:15,899 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-02-06 04:16:15,899 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-06 04:16:15,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:16:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:16:17,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:16:17,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104533961] [2025-02-06 04:16:17,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104533961] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:16:17,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745218137] [2025-02-06 04:16:17,533 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:16:17,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:16:17,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:16:17,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:16:17,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 04:16:17,627 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-02-06 04:16:18,070 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-02-06 04:16:18,070 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-06 04:16:18,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:16:18,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-06 04:16:18,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:16:18,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-02-06 04:16:18,181 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2025-02-06 04:16:18,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 19 [2025-02-06 04:16:18,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2025-02-06 04:16:18,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 19 [2025-02-06 04:16:18,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2025-02-06 04:16:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:16:18,813 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:16:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:16:19,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745218137] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:16:19,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:16:19,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2025-02-06 04:16:19,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110416433] [2025-02-06 04:16:19,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:16:19,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-06 04:16:19,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:16:19,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-06 04:16:19,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2025-02-06 04:16:19,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-02-06 04:16:19,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 1551 transitions, 24479 flow. Second operand has 33 states, 33 states have (on average 10.909090909090908) internal successors, (360), 33 states have internal predecessors, (360), 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) [2025-02-06 04:16:19,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:16:19,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-02-06 04:16:19,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand