./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 735b3cc8 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/stack_longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! 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-?-735b3cc-m [2025-03-14 00:44:30,438 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 00:44:30,488 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 00:44:30,494 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 00:44:30,494 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 00:44:30,519 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 00:44:30,521 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 00:44:30,521 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 00:44:30,521 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 00:44:30,522 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 00:44:30,522 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 00:44:30,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 00:44:30,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 00:44:30,522 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 00:44:30,522 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 00:44:30,523 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 00:44:30,523 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 00:44:30,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 00:44:30,524 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 00:44:30,524 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 00:44:30,524 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 00:44:30,524 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 00:44:30,524 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 00:44:30,524 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 00:44:30,524 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 00:44:30,525 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 00:44:30,525 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 00:44:30,525 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 00:44:30,525 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! 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 [2025-03-14 00:44:30,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 00:44:30,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 00:44:30,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 00:44:30,740 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 00:44:30,740 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 00:44:30,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longest-2.i [2025-03-14 00:44:31,837 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ae860e1/c561bfb85b624ddeaa496c73e405a175/FLAG799ffff6f [2025-03-14 00:44:32,138 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 00:44:32,138 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i [2025-03-14 00:44:32,157 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ae860e1/c561bfb85b624ddeaa496c73e405a175/FLAG799ffff6f [2025-03-14 00:44:32,172 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ae860e1/c561bfb85b624ddeaa496c73e405a175 [2025-03-14 00:44:32,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 00:44:32,177 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 00:44:32,178 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 00:44:32,178 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 00:44:32,182 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 00:44:32,183 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,184 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1640e41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32, skipping insertion in model container [2025-03-14 00:44:32,184 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,216 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 00:44:32,557 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2025-03-14 00:44:32,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 00:44:32,630 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 00:44:32,668 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2025-03-14 00:44:32,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 00:44:32,758 INFO L204 MainTranslator]: Completed translation [2025-03-14 00:44:32,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32 WrapperNode [2025-03-14 00:44:32,759 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 00:44:32,760 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 00:44:32,760 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 00:44:32,760 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 00:44:32,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,821 INFO L138 Inliner]: procedures = 277, calls = 830, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 939 [2025-03-14 00:44:32,821 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 00:44:32,822 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 00:44:32,822 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 00:44:32,822 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 00:44:32,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,838 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,876 INFO L175 MemorySlicer]: Split 809 memory accesses to 3 slices as follows [2, 5, 802]. 99 percent of accesses are in the largest equivalence class. The 807 initializations are split as follows [2, 5, 800]. The 1 writes are split as follows [0, 0, 1]. [2025-03-14 00:44:32,876 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,904 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,907 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,909 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 00:44:32,922 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 00:44:32,922 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 00:44:32,922 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 00:44:32,923 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (1/1) ... [2025-03-14 00:44:32,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 00:44:32,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:44:32,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-14 00:44:32,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-14 00:44:32,968 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-14 00:44:32,969 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-14 00:44:32,969 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-14 00:44:32,969 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-14 00:44:32,969 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-14 00:44:32,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-14 00:44:32,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-14 00:44:32,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-14 00:44:32,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-14 00:44:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-14 00:44:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-14 00:44:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-14 00:44:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 00:44:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 00:44:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-14 00:44:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-14 00:44:32,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 00:44:32,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 00:44:32,971 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 00:44:33,086 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 00:44:33,088 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 00:44:34,001 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L985-1: pop_#res#1 := 0; [2025-03-14 00:44:34,002 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L983: havoc pop_#t~mem37#1; [2025-03-14 00:44:34,002 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L983-1: havoc pop_#t~ret36#1; [2025-03-14 00:44:34,003 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 00:44:34,003 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 00:44:34,003 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 00:44:45,341 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 00:44:45,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 12:44:45 BoogieIcfgContainer [2025-03-14 00:44:45,342 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 00:44:45,343 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 00:44:45,343 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 00:44:45,347 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 00:44:45,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 12:44:32" (1/3) ... [2025-03-14 00:44:45,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a25b0e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 12:44:45, skipping insertion in model container [2025-03-14 00:44:45,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:44:32" (2/3) ... [2025-03-14 00:44:45,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a25b0e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 12:44:45, skipping insertion in model container [2025-03-14 00:44:45,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 12:44:45" (3/3) ... [2025-03-14 00:44:45,349 INFO L128 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2025-03-14 00:44:45,360 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 00:44:45,361 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. [2025-03-14 00:44:45,361 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 00:44:45,420 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-14 00:44:45,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2025-03-14 00:44:45,495 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-03-14 00:44:45,497 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-14 00:44:45,499 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 64 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. [2025-03-14 00:44:45,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2025-03-14 00:44:45,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2025-03-14 00:44:45,511 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 00:44:45,521 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;@4858996c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 00:44:45,523 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-14 00:44:45,553 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 00:44:45,553 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2025-03-14 00:44:45,553 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-14 00:44:45,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:44:45,554 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:44:45,555 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-14 00:44:45,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:44:45,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1317435824, now seen corresponding path program 1 times [2025-03-14 00:44:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:44:45,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738871249] [2025-03-14 00:44:45,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:44:45,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:44:45,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-14 00:44:45,834 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-14 00:44:45,835 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:44:45,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:46,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:44:46,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738871249] [2025-03-14 00:44:46,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738871249] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 00:44:46,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 00:44:46,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 00:44:46,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783315224] [2025-03-14 00:44:46,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 00:44:46,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 00:44:46,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:44:46,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 00:44:46,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 00:44:46,401 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-14 00:44:46,403 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) [2025-03-14 00:44:46,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:44:46,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-14 00:44:46,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:44:46,573 INFO L124 PetriNetUnfolderBase]: 307/564 cut-off events. [2025-03-14 00:44:46,573 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-14 00:44:46,575 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 2467 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. [2025-03-14 00:44:46,579 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2025-03-14 00:44:46,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 214 flow [2025-03-14 00:44:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 00:44:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 00:44:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2025-03-14 00:44:46,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2025-03-14 00:44:46,591 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 4 states and 83 transitions. [2025-03-14 00:44:46,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 214 flow [2025-03-14 00:44:46,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-14 00:44:46,599 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2025-03-14 00:44:46,602 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} [2025-03-14 00:44:46,604 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2025-03-14 00:44:46,604 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2025-03-14 00:44:46,604 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) [2025-03-14 00:44:46,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:44:46,604 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:44:46,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 00:44:46,604 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-14 00:44:46,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:44:46,605 INFO L85 PathProgramCache]: Analyzing trace with hash 780898027, now seen corresponding path program 1 times [2025-03-14 00:44:46,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:44:46,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477066844] [2025-03-14 00:44:46,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:44:46,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:44:46,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-14 00:44:46,682 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-14 00:44:46,684 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:44:46,684 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:47,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:44:47,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477066844] [2025-03-14 00:44:47,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477066844] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:44:47,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167766413] [2025-03-14 00:44:47,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:44:47,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:44:47,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:44:47,065 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:44:47,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 00:44:47,149 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-14 00:44:47,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-14 00:44:47,339 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:44:47,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:47,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-14 00:44:47,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:44:47,405 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 [2025-03-14 00:44:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:47,453 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:44:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:47,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167766413] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:44:47,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:44:47,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-03-14 00:44:47,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980426278] [2025-03-14 00:44:47,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:44:47,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-14 00:44:47,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:44:47,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-14 00:44:47,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2025-03-14 00:44:47,512 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-14 00:44:47,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:44:47,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:44:47,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-14 00:44:47,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:44:48,047 INFO L124 PetriNetUnfolderBase]: 1257/2332 cut-off events. [2025-03-14 00:44:48,047 INFO L125 PetriNetUnfolderBase]: For 297/299 co-relation queries the response was YES. [2025-03-14 00:44:48,056 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 12417 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. [2025-03-14 00:44:48,067 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 163 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2025-03-14 00:44:48,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 204 transitions, 900 flow [2025-03-14 00:44:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-14 00:44:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-14 00:44:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 313 transitions. [2025-03-14 00:44:48,074 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2025-03-14 00:44:48,074 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 15 states and 313 transitions. [2025-03-14 00:44:48,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 204 transitions, 900 flow [2025-03-14 00:44:48,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 204 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 00:44:48,077 INFO L231 Difference]: Finished difference. Result has 54 places, 66 transitions, 329 flow [2025-03-14 00:44:48,077 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} [2025-03-14 00:44:48,078 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2025-03-14 00:44:48,078 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 66 transitions, 329 flow [2025-03-14 00:44:48,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:44:48,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:44:48,078 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:44:48,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-14 00:44:48,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:44:48,283 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-14 00:44:48,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:44:48,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1405512292, now seen corresponding path program 1 times [2025-03-14 00:44:48,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:44:48,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416962761] [2025-03-14 00:44:48,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:44:48,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:44:48,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-14 00:44:48,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-14 00:44:48,331 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:44:48,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:48,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:44:48,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416962761] [2025-03-14 00:44:48,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416962761] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 00:44:48,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 00:44:48,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-14 00:44:48,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663262279] [2025-03-14 00:44:48,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 00:44:48,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 00:44:48,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:44:48,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 00:44:48,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 00:44:48,518 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-14 00:44:48,519 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) [2025-03-14 00:44:48,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:44:48,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-14 00:44:48,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:44:48,676 INFO L124 PetriNetUnfolderBase]: 669/1351 cut-off events. [2025-03-14 00:44:48,676 INFO L125 PetriNetUnfolderBase]: For 601/601 co-relation queries the response was YES. [2025-03-14 00:44:48,679 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 6861 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. [2025-03-14 00:44:48,684 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 43 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2025-03-14 00:44:48,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 339 flow [2025-03-14 00:44:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 00:44:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 00:44:48,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-14 00:44:48,685 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2025-03-14 00:44:48,685 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 329 flow. Second operand 3 states and 58 transitions. [2025-03-14 00:44:48,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 339 flow [2025-03-14 00:44:48,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 307 flow, removed 16 selfloop flow, removed 3 redundant places. [2025-03-14 00:44:48,691 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 198 flow [2025-03-14 00:44:48,691 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} [2025-03-14 00:44:48,692 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2025-03-14 00:44:48,692 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 198 flow [2025-03-14 00:44:48,692 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) [2025-03-14 00:44:48,692 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:44:48,692 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:44:48,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-14 00:44:48,692 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-14 00:44:48,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:44:48,693 INFO L85 PathProgramCache]: Analyzing trace with hash 461484055, now seen corresponding path program 1 times [2025-03-14 00:44:48,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:44:48,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498528394] [2025-03-14 00:44:48,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:44:48,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:44:48,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-14 00:44:48,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-14 00:44:48,893 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:44:48,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:49,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:44:49,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498528394] [2025-03-14 00:44:49,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498528394] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 00:44:49,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 00:44:49,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 00:44:49,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184791557] [2025-03-14 00:44:49,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 00:44:49,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 00:44:49,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:44:49,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 00:44:49,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-14 00:44:49,857 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-14 00:44:49,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:44:49,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:44:49,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-14 00:44:49,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:44:50,072 INFO L124 PetriNetUnfolderBase]: 813/1606 cut-off events. [2025-03-14 00:44:50,072 INFO L125 PetriNetUnfolderBase]: For 562/562 co-relation queries the response was YES. [2025-03-14 00:44:50,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3740 conditions, 1606 events. 813/1606 cut-off events. For 562/562 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8135 event pairs, 244 based on Foata normal form. 0/1550 useless extension candidates. Maximal degree in co-relation 3360. Up to 823 conditions per place. [2025-03-14 00:44:50,080 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 60 selfloop transitions, 13 changer transitions 6/84 dead transitions. [2025-03-14 00:44:50,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 463 flow [2025-03-14 00:44:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 00:44:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 00:44:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2025-03-14 00:44:50,082 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5529411764705883 [2025-03-14 00:44:50,082 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 198 flow. Second operand 5 states and 94 transitions. [2025-03-14 00:44:50,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 463 flow [2025-03-14 00:44:50,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 452 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 00:44:50,086 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 284 flow [2025-03-14 00:44:50,086 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=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-03-14 00:44:50,087 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2025-03-14 00:44:50,087 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 284 flow [2025-03-14 00:44:50,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:44:50,087 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:44:50,087 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:44:50,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-14 00:44:50,087 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-14 00:44:50,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:44:50,088 INFO L85 PathProgramCache]: Analyzing trace with hash -968181834, now seen corresponding path program 1 times [2025-03-14 00:44:50,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:44:50,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590046422] [2025-03-14 00:44:50,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:44:50,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:44:50,107 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-14 00:44:50,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 00:44:50,140 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:44:50,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:51,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:44:51,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590046422] [2025-03-14 00:44:51,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590046422] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:44:51,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126950070] [2025-03-14 00:44:51,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:44:51,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:44:51,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:44:51,030 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:44:51,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-14 00:44:51,099 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-14 00:44:51,277 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 00:44:51,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:44:51,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:51,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-14 00:44:51,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:44:51,314 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 [2025-03-14 00:44:51,372 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 [2025-03-14 00:44:51,452 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 [2025-03-14 00:44:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:51,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:44:51,791 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 [2025-03-14 00:44:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:51,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126950070] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:44:51,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:44:51,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-03-14 00:44:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30090578] [2025-03-14 00:44:51,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:44:51,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-14 00:44:51,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:44:51,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-14 00:44:51,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-03-14 00:44:51,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-14 00:44:51,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 284 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) [2025-03-14 00:44:51,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:44:51,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-14 00:44:51,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:44:53,161 INFO L124 PetriNetUnfolderBase]: 2192/4299 cut-off events. [2025-03-14 00:44:53,161 INFO L125 PetriNetUnfolderBase]: For 3081/3081 co-relation queries the response was YES. [2025-03-14 00:44:53,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10084 conditions, 4299 events. 2192/4299 cut-off events. For 3081/3081 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 26270 event pairs, 313 based on Foata normal form. 0/4285 useless extension candidates. Maximal degree in co-relation 9092. Up to 701 conditions per place. [2025-03-14 00:44:53,186 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 277 selfloop transitions, 69 changer transitions 40/391 dead transitions. [2025-03-14 00:44:53,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 391 transitions, 2168 flow [2025-03-14 00:44:53,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-14 00:44:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-03-14 00:44:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 615 transitions. [2025-03-14 00:44:53,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5320069204152249 [2025-03-14 00:44:53,188 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 284 flow. Second operand 34 states and 615 transitions. [2025-03-14 00:44:53,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 391 transitions, 2168 flow [2025-03-14 00:44:53,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 391 transitions, 2160 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-14 00:44:53,206 INFO L231 Difference]: Finished difference. Result has 96 places, 105 transitions, 784 flow [2025-03-14 00:44:53,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=784, PETRI_PLACES=96, PETRI_TRANSITIONS=105} [2025-03-14 00:44:53,207 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 64 predicate places. [2025-03-14 00:44:53,208 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 105 transitions, 784 flow [2025-03-14 00:44:53,208 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) [2025-03-14 00:44:53,208 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:44:53,208 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] [2025-03-14 00:44:53,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-14 00:44:53,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:44:53,409 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-14 00:44:53,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:44:53,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1849627845, now seen corresponding path program 1 times [2025-03-14 00:44:53,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:44:53,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568626963] [2025-03-14 00:44:53,410 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:44:53,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:44:53,431 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-14 00:44:53,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-14 00:44:53,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:44:53,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 00:44:53,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:44:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568626963] [2025-03-14 00:44:53,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568626963] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 00:44:53,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 00:44:53,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 00:44:53,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023979161] [2025-03-14 00:44:53,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 00:44:53,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 00:44:53,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:44:53,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 00:44:53,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-14 00:44:53,740 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-14 00:44:53,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 105 transitions, 784 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) [2025-03-14 00:44:53,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:44:53,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-14 00:44:53,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:44:54,154 INFO L124 PetriNetUnfolderBase]: 2366/4672 cut-off events. [2025-03-14 00:44:54,154 INFO L125 PetriNetUnfolderBase]: For 5730/5730 co-relation queries the response was YES. [2025-03-14 00:44:54,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11550 conditions, 4672 events. 2366/4672 cut-off events. For 5730/5730 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 29668 event pairs, 599 based on Foata normal form. 18/4683 useless extension candidates. Maximal degree in co-relation 11249. Up to 1553 conditions per place. [2025-03-14 00:44:54,181 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 83 selfloop transitions, 61 changer transitions 2/151 dead transitions. [2025-03-14 00:44:54,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 1254 flow [2025-03-14 00:44:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 00:44:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 00:44:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2025-03-14 00:44:54,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2025-03-14 00:44:54,182 INFO L175 Difference]: Start difference. First operand has 96 places, 105 transitions, 784 flow. Second operand 6 states and 112 transitions. [2025-03-14 00:44:54,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 1254 flow [2025-03-14 00:44:54,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 151 transitions, 1207 flow, removed 21 selfloop flow, removed 1 redundant places. [2025-03-14 00:44:54,203 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 988 flow [2025-03-14 00:44:54,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=988, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2025-03-14 00:44:54,204 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 70 predicate places. [2025-03-14 00:44:54,204 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 988 flow [2025-03-14 00:44:54,204 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) [2025-03-14 00:44:54,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:44:54,204 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] [2025-03-14 00:44:54,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-14 00:44:54,204 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-14 00:44:54,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:44:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1363535238, now seen corresponding path program 1 times [2025-03-14 00:44:54,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:44:54,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869431654] [2025-03-14 00:44:54,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:44:54,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:44:54,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-14 00:44:54,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-14 00:44:54,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:44:54,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:55,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:44:55,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869431654] [2025-03-14 00:44:55,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869431654] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:44:55,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279126195] [2025-03-14 00:44:55,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:44:55,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:44:55,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:44:55,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:44:55,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-14 00:44:55,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-14 00:44:55,478 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-14 00:44:55,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:44:55,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:55,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-14 00:44:55,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:44:55,519 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 [2025-03-14 00:44:55,594 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 82 treesize of output 66 [2025-03-14 00:44:55,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2025-03-14 00:44:55,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 00:44:55,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 88 treesize of output 43 [2025-03-14 00:44:56,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 00:44:56,010 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 113 treesize of output 57 [2025-03-14 00:44:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:56,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:44:56,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 00:44:56,603 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 [2025-03-14 00:44:56,623 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2025-03-14 00:44:56,623 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 [2025-03-14 00:44:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:56,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279126195] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:44:56,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:44:56,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-14 00:44:56,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790795850] [2025-03-14 00:44:56,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:44:56,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-14 00:44:56,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:44:56,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-14 00:44:56,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2025-03-14 00:44:56,685 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-14 00:44:56,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 988 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) [2025-03-14 00:44:56,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:44:56,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-14 00:44:56,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:44:58,664 INFO L124 PetriNetUnfolderBase]: 4276/8447 cut-off events. [2025-03-14 00:44:58,664 INFO L125 PetriNetUnfolderBase]: For 17475/17475 co-relation queries the response was YES. [2025-03-14 00:44:58,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22027 conditions, 8447 events. 4276/8447 cut-off events. For 17475/17475 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 55561 event pairs, 992 based on Foata normal form. 119/8559 useless extension candidates. Maximal degree in co-relation 21187. Up to 1397 conditions per place. [2025-03-14 00:44:58,712 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 225 selfloop transitions, 139 changer transitions 36/405 dead transitions. [2025-03-14 00:44:58,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 405 transitions, 3233 flow [2025-03-14 00:44:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-14 00:44:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-14 00:44:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 455 transitions. [2025-03-14 00:44:58,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5352941176470588 [2025-03-14 00:44:58,715 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 988 flow. Second operand 25 states and 455 transitions. [2025-03-14 00:44:58,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 405 transitions, 3233 flow [2025-03-14 00:44:58,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 405 transitions, 3143 flow, removed 29 selfloop flow, removed 2 redundant places. [2025-03-14 00:44:58,760 INFO L231 Difference]: Finished difference. Result has 131 places, 188 transitions, 2066 flow [2025-03-14 00:44:58,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2066, PETRI_PLACES=131, PETRI_TRANSITIONS=188} [2025-03-14 00:44:58,761 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 99 predicate places. [2025-03-14 00:44:58,762 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 188 transitions, 2066 flow [2025-03-14 00:44:58,762 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) [2025-03-14 00:44:58,762 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:44:58,763 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-14 00:44:58,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-14 00:44:58,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:44:58,963 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-14 00:44:58,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:44:58,964 INFO L85 PathProgramCache]: Analyzing trace with hash 738917660, now seen corresponding path program 2 times [2025-03-14 00:44:58,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:44:58,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838009802] [2025-03-14 00:44:58,964 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 00:44:58,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:44:58,985 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-14 00:44:59,014 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-14 00:44:59,015 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 00:44:59,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:59,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:44:59,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838009802] [2025-03-14 00:44:59,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838009802] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:44:59,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780654016] [2025-03-14 00:44:59,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 00:44:59,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:44:59,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:44:59,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:44:59,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-14 00:44:59,547 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-14 00:44:59,712 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-14 00:44:59,713 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 00:44:59,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:44:59,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-14 00:44:59,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:44:59,741 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 [2025-03-14 00:44:59,776 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 [2025-03-14 00:44:59,836 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 [2025-03-14 00:44:59,887 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 [2025-03-14 00:44:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:44:59,940 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:45:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:45:00,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780654016] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:45:00,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:45:00,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2025-03-14 00:45:00,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030907411] [2025-03-14 00:45:00,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:45:00,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-14 00:45:00,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:45:00,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-14 00:45:00,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2025-03-14 00:45:00,061 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-14 00:45:00,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 188 transitions, 2066 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) [2025-03-14 00:45:00,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:45:00,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-14 00:45:00,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:45:03,239 INFO L124 PetriNetUnfolderBase]: 11738/22854 cut-off events. [2025-03-14 00:45:03,239 INFO L125 PetriNetUnfolderBase]: For 72119/72119 co-relation queries the response was YES. [2025-03-14 00:45:03,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65887 conditions, 22854 events. 11738/22854 cut-off events. For 72119/72119 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 172009 event pairs, 1878 based on Foata normal form. 270/23117 useless extension candidates. Maximal degree in co-relation 63929. Up to 3792 conditions per place. [2025-03-14 00:45:03,403 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 602 selfloop transitions, 434 changer transitions 28/1069 dead transitions. [2025-03-14 00:45:03,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 1069 transitions, 10142 flow [2025-03-14 00:45:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2025-03-14 00:45:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2025-03-14 00:45:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 1143 transitions. [2025-03-14 00:45:03,407 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5252757352941176 [2025-03-14 00:45:03,407 INFO L175 Difference]: Start difference. First operand has 131 places, 188 transitions, 2066 flow. Second operand 64 states and 1143 transitions. [2025-03-14 00:45:03,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 1069 transitions, 10142 flow [2025-03-14 00:45:03,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 1069 transitions, 9824 flow, removed 155 selfloop flow, removed 3 redundant places. [2025-03-14 00:45:03,805 INFO L231 Difference]: Finished difference. Result has 209 places, 514 transitions, 6921 flow [2025-03-14 00:45:03,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=6921, PETRI_PLACES=209, PETRI_TRANSITIONS=514} [2025-03-14 00:45:03,807 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 177 predicate places. [2025-03-14 00:45:03,807 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 514 transitions, 6921 flow [2025-03-14 00:45:03,808 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) [2025-03-14 00:45:03,808 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:45:03,808 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] [2025-03-14 00:45:03,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-14 00:45:04,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:45:04,012 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-14 00:45:04,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:45:04,014 INFO L85 PathProgramCache]: Analyzing trace with hash -991293339, now seen corresponding path program 2 times [2025-03-14 00:45:04,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:45:04,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174682305] [2025-03-14 00:45:04,014 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 00:45:04,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:45:04,034 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-14 00:45:04,091 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-14 00:45:04,091 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 00:45:04,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:45:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:45:05,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:45:05,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174682305] [2025-03-14 00:45:05,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174682305] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:45:05,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865868366] [2025-03-14 00:45:05,560 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 00:45:05,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:45:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:45:05,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:45:05,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-14 00:45:05,645 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-14 00:45:05,849 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-14 00:45:05,849 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 00:45:05,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:45:05,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-14 00:45:05,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:45:05,886 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 [2025-03-14 00:45:05,930 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 66 treesize of output 50 [2025-03-14 00:45:05,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2025-03-14 00:45:05,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2025-03-14 00:45:06,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 48 [2025-03-14 00:45:06,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 00:45:06,607 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 131 treesize of output 63 [2025-03-14 00:45:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:45:06,640 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:45:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:45:07,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865868366] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:45:07,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:45:07,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-03-14 00:45:07,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385169729] [2025-03-14 00:45:07,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:45:07,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-14 00:45:07,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:45:07,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-14 00:45:07,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2025-03-14 00:45:07,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-14 00:45:07,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 514 transitions, 6921 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) [2025-03-14 00:45:07,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:45:07,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-14 00:45:07,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:45:15,690 INFO L124 PetriNetUnfolderBase]: 22623/44022 cut-off events. [2025-03-14 00:45:15,690 INFO L125 PetriNetUnfolderBase]: For 233767/233767 co-relation queries the response was YES. [2025-03-14 00:45:16,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136346 conditions, 44022 events. 22623/44022 cut-off events. For 233767/233767 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 358851 event pairs, 3270 based on Foata normal form. 803/44818 useless extension candidates. Maximal degree in co-relation 134179. Up to 7392 conditions per place. [2025-03-14 00:45:16,245 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 500 selfloop transitions, 805 changer transitions 38/1348 dead transitions. [2025-03-14 00:45:16,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1348 transitions, 18009 flow [2025-03-14 00:45:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-14 00:45:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-03-14 00:45:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 677 transitions. [2025-03-14 00:45:16,248 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5105580693815988 [2025-03-14 00:45:16,248 INFO L175 Difference]: Start difference. First operand has 209 places, 514 transitions, 6921 flow. Second operand 39 states and 677 transitions. [2025-03-14 00:45:16,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1348 transitions, 18009 flow [2025-03-14 00:45:18,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1348 transitions, 16617 flow, removed 696 selfloop flow, removed 0 redundant places. [2025-03-14 00:45:18,276 INFO L231 Difference]: Finished difference. Result has 273 places, 972 transitions, 14867 flow [2025-03-14 00:45:18,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=14867, PETRI_PLACES=273, PETRI_TRANSITIONS=972} [2025-03-14 00:45:18,277 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 241 predicate places. [2025-03-14 00:45:18,277 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 972 transitions, 14867 flow [2025-03-14 00:45:18,277 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) [2025-03-14 00:45:18,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:45:18,277 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:45:18,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-14 00:45:18,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:45:18,478 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-14 00:45:18,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:45:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash 616857468, now seen corresponding path program 1 times [2025-03-14 00:45:18,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:45:18,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237972752] [2025-03-14 00:45:18,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:45:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:45:18,505 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-14 00:45:18,522 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-14 00:45:18,522 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:45:18,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:45:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-14 00:45:19,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:45:19,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237972752] [2025-03-14 00:45:19,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237972752] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:45:19,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140827083] [2025-03-14 00:45:19,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:45:19,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:45:19,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:45:19,029 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:45:19,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-14 00:45:19,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-14 00:45:19,260 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-14 00:45:19,260 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:45:19,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:45:19,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-14 00:45:19,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:45:19,281 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 [2025-03-14 00:45:19,315 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 [2025-03-14 00:45:19,350 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 [2025-03-14 00:45:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:45:19,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:45:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-14 00:45:19,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140827083] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:45:19,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:45:19,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 20 [2025-03-14 00:45:19,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385084470] [2025-03-14 00:45:19,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:45:19,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-14 00:45:19,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:45:19,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-14 00:45:19,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2025-03-14 00:45:19,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-14 00:45:19,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 972 transitions, 14867 flow. Second operand has 20 states, 20 states have (on average 12.65) internal successors, (253), 20 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:45:19,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:45:19,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-14 00:45:19,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 00:45:31,865 INFO L124 PetriNetUnfolderBase]: 29072/56666 cut-off events. [2025-03-14 00:45:31,865 INFO L125 PetriNetUnfolderBase]: For 406317/406317 co-relation queries the response was YES. [2025-03-14 00:45:32,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187577 conditions, 56666 events. 29072/56666 cut-off events. For 406317/406317 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 474220 event pairs, 3170 based on Foata normal form. 213/56848 useless extension candidates. Maximal degree in co-relation 185423. Up to 9507 conditions per place. [2025-03-14 00:45:32,974 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 473 selfloop transitions, 1101 changer transitions 18/1597 dead transitions. [2025-03-14 00:45:32,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1597 transitions, 24119 flow [2025-03-14 00:45:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-14 00:45:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-03-14 00:45:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 652 transitions. [2025-03-14 00:45:32,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5326797385620915 [2025-03-14 00:45:32,976 INFO L175 Difference]: Start difference. First operand has 273 places, 972 transitions, 14867 flow. Second operand 36 states and 652 transitions. [2025-03-14 00:45:32,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1597 transitions, 24119 flow [2025-03-14 00:45:38,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1597 transitions, 23184 flow, removed 448 selfloop flow, removed 5 redundant places. [2025-03-14 00:45:38,093 INFO L231 Difference]: Finished difference. Result has 317 places, 1279 transitions, 21889 flow [2025-03-14 00:45:38,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=14225, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21889, PETRI_PLACES=317, PETRI_TRANSITIONS=1279} [2025-03-14 00:45:38,094 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 285 predicate places. [2025-03-14 00:45:38,094 INFO L471 AbstractCegarLoop]: Abstraction has has 317 places, 1279 transitions, 21889 flow [2025-03-14 00:45:38,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.65) internal successors, (253), 20 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:45:38,094 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:45:38,095 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] [2025-03-14 00:45:38,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-14 00:45:38,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:45:38,295 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-14 00:45:38,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:45:38,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1697695330, now seen corresponding path program 3 times [2025-03-14 00:45:38,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:45:38,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234060419] [2025-03-14 00:45:38,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 00:45:38,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:45:38,319 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-03-14 00:45:38,991 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-03-14 00:45:38,991 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-14 00:45:38,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:45:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-14 00:45:41,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:45:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234060419] [2025-03-14 00:45:41,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234060419] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 00:45:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988243852] [2025-03-14 00:45:41,120 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 00:45:41,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 00:45:41,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:45:41,122 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 00:45:41,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-14 00:45:41,210 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-03-14 00:45:41,477 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-03-14 00:45:41,477 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-14 00:45:41,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:45:41,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-14 00:45:41,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 00:45:41,536 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 23 treesize of output 11 [2025-03-14 00:45:41,589 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 69 treesize of output 51 [2025-03-14 00:45:41,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 77 [2025-03-14 00:45:41,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 27 [2025-03-14 00:45:41,775 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 125 treesize of output 93 [2025-03-14 00:45:41,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 115 [2025-03-14 00:45:41,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 88 [2025-03-14 00:45:42,230 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 237 treesize of output 177 [2025-03-14 00:45:42,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 181 [2025-03-14 00:45:42,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 150 [2025-03-14 00:45:46,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 00:45:46,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 455 treesize of output 231 [2025-03-14 00:45:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:45:46,390 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 00:45:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:45:46,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988243852] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 00:45:46,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 00:45:46,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2025-03-14 00:45:46,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617600794] [2025-03-14 00:45:46,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 00:45:46,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-14 00:45:46,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:45:46,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-14 00:45:46,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2025-03-14 00:45:46,843 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-14 00:45:46,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 1279 transitions, 21889 flow. Second operand has 32 states, 32 states have (on average 11.03125) internal successors, (353), 32 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 00:45:46,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:45:46,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-14 00:45:46,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand