./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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-1.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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:12:28,892 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:12:28,932 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:12:28,935 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:12:28,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:12:28,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:12:28,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:12:28,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:12:28,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:12:28,950 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:12:28,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:12:28,950 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:12:28,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:12:28,951 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:12:28,951 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:12:28,952 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:12:28,952 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:12:28,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:12:28,952 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 -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2025-03-08 17:12:29,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:12:29,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:12:29,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:12:29,185 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:12:29,185 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:12:29,186 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack-1.i [2025-03-08 17:12:30,273 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ee24730/50c0362fb9c046febbf06b95eccc23c2/FLAG83c09b096 [2025-03-08 17:12:30,558 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:12:30,560 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i [2025-03-08 17:12:30,571 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ee24730/50c0362fb9c046febbf06b95eccc23c2/FLAG83c09b096 [2025-03-08 17:12:30,841 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55ee24730/50c0362fb9c046febbf06b95eccc23c2 [2025-03-08 17:12:30,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:12:30,844 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:12:30,845 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:12:30,845 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:12:30,848 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:12:30,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:12:30" (1/1) ... [2025-03-08 17:12:30,849 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117fad5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:30, skipping insertion in model container [2025-03-08 17:12:30,849 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:12:30" (1/1) ... [2025-03-08 17:12:30,878 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:12:31,161 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-1.i[41520,41533] [2025-03-08 17:12:31,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:12:31,206 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:12:31,239 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-1.i[41520,41533] [2025-03-08 17:12:31,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:12:31,294 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:12:31,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31 WrapperNode [2025-03-08 17:12:31,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:12:31,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:12:31,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:12:31,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:12:31,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,335 INFO L138 Inliner]: procedures = 277, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 144 [2025-03-08 17:12:31,335 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:12:31,336 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:12:31,336 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:12:31,336 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:12:31,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,344 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,354 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 1 writes are split as follows [0, 0, 1]. [2025-03-08 17:12:31,354 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,354 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,359 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,359 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,360 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,361 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,363 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:12:31,363 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:12:31,363 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:12:31,363 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:12:31,364 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (1/1) ... [2025-03-08 17:12:31,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:12:31,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:31,388 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) [2025-03-08 17:12:31,390 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 [2025-03-08 17:12:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-08 17:12:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-08 17:12:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-08 17:12:31,408 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 17:12:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:12:31,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:12:31,409 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:12:31,505 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:12:31,507 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:12:31,727 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L986-1: pop_#res#1 := 0; [2025-03-08 17:12:31,728 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L984: havoc pop_#t~mem37#1; [2025-03-08 17:12:31,728 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L984-1: havoc pop_#t~ret36#1; [2025-03-08 17:12:31,729 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:12:31,729 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:12:31,872 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:12:31,873 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:12:31,873 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:12:31 BoogieIcfgContainer [2025-03-08 17:12:31,874 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:12:31,875 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:12:31,875 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:12:31,879 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:12:31,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:12:30" (1/3) ... [2025-03-08 17:12:31,879 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386dfe25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:12:31, skipping insertion in model container [2025-03-08 17:12:31,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:31" (2/3) ... [2025-03-08 17:12:31,879 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386dfe25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:12:31, skipping insertion in model container [2025-03-08 17:12:31,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:12:31" (3/3) ... [2025-03-08 17:12:31,880 INFO L128 eAbstractionObserver]: Analyzing ICFG stack-1.i [2025-03-08 17:12:31,890 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:12:31,892 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stack-1.i that has 3 procedures, 30 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-03-08 17:12:31,892 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:12:31,940 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:12:31,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2025-03-08 17:12:31,985 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-03-08 17:12:31,986 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:12:31,989 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 4. Compared 59 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. [2025-03-08 17:12:31,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2025-03-08 17:12:31,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2025-03-08 17:12:31,998 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:12:32,007 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;@bb21be3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:12:32,007 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-08 17:12:32,014 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:12:32,014 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2025-03-08 17:12:32,014 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-08 17:12:32,014 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:32,015 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:32,015 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:32,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:32,032 INFO L85 PathProgramCache]: Analyzing trace with hash -614144600, now seen corresponding path program 1 times [2025-03-08 17:12:32,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:32,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131764280] [2025-03-08 17:12:32,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:32,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:32,102 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-08 17:12:32,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-08 17:12:32,133 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:32,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:32,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:32,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131764280] [2025-03-08 17:12:32,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131764280] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:12:32,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:12:32,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:12:32,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793654842] [2025-03-08 17:12:32,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:32,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:12:32,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:32,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:12:32,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:12:32,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:32,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2025-03-08 17:12:32,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:32,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:32,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:32,574 INFO L124 PetriNetUnfolderBase]: 395/727 cut-off events. [2025-03-08 17:12:32,574 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-03-08 17:12:32,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1431 conditions, 727 events. 395/727 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3181 event pairs, 84 based on Foata normal form. 45/701 useless extension candidates. Maximal degree in co-relation 1349. Up to 343 conditions per place. [2025-03-08 17:12:32,582 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 52 selfloop transitions, 6 changer transitions 2/65 dead transitions. [2025-03-08 17:12:32,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 65 transitions, 268 flow [2025-03-08 17:12:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:12:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:12:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2025-03-08 17:12:32,593 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6058823529411764 [2025-03-08 17:12:32,594 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 5 states and 103 transitions. [2025-03-08 17:12:32,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 65 transitions, 268 flow [2025-03-08 17:12:32,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 65 transitions, 259 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-08 17:12:32,605 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 112 flow [2025-03-08 17:12:32,607 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=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2025-03-08 17:12:32,612 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2025-03-08 17:12:32,612 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 112 flow [2025-03-08 17:12:32,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2025-03-08 17:12:32,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:32,613 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:32,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:12:32,613 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:32,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:32,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1559438173, now seen corresponding path program 1 times [2025-03-08 17:12:32,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:32,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305664517] [2025-03-08 17:12:32,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:32,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:32,631 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:12:32,640 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:12:32,640 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:32,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:32,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305664517] [2025-03-08 17:12:32,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305664517] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229824090] [2025-03-08 17:12:32,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:32,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:32,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:32,873 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) [2025-03-08 17:12:32,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:12:32,936 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:12:32,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:12:32,956 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:32,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:32,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 17:12:32,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:33,012 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 [2025-03-08 17:12:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:33,071 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:33,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229824090] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:33,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:33,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-08 17:12:33,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434205027] [2025-03-08 17:12:33,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:33,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:12:33,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:33,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:12:33,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:12:33,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:33,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 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) [2025-03-08 17:12:33,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:33,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:33,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:33,563 INFO L124 PetriNetUnfolderBase]: 1222/2258 cut-off events. [2025-03-08 17:12:33,563 INFO L125 PetriNetUnfolderBase]: For 939/944 co-relation queries the response was YES. [2025-03-08 17:12:33,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5242 conditions, 2258 events. 1222/2258 cut-off events. For 939/944 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11829 event pairs, 173 based on Foata normal form. 18/2168 useless extension candidates. Maximal degree in co-relation 4658. Up to 507 conditions per place. [2025-03-08 17:12:33,579 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 151 selfloop transitions, 32 changer transitions 2/190 dead transitions. [2025-03-08 17:12:33,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 190 transitions, 949 flow [2025-03-08 17:12:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 17:12:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-08 17:12:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2025-03-08 17:12:33,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6221719457013575 [2025-03-08 17:12:33,584 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 112 flow. Second operand 13 states and 275 transitions. [2025-03-08 17:12:33,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 190 transitions, 949 flow [2025-03-08 17:12:33,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 190 transitions, 949 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 17:12:33,590 INFO L231 Difference]: Finished difference. Result has 55 places, 64 transitions, 414 flow [2025-03-08 17:12:33,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=414, PETRI_PLACES=55, PETRI_TRANSITIONS=64} [2025-03-08 17:12:33,590 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2025-03-08 17:12:33,591 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 64 transitions, 414 flow [2025-03-08 17:12:33,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 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) [2025-03-08 17:12:33,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:33,591 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:33,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 17:12:33,795 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 [2025-03-08 17:12:33,795 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:33,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:33,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1831371690, now seen corresponding path program 1 times [2025-03-08 17:12:33,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:33,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061663394] [2025-03-08 17:12:33,796 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:33,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:33,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:12:33,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:12:33,814 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:33,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:33,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:33,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061663394] [2025-03-08 17:12:33,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061663394] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:12:33,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:12:33,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:12:33,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473340904] [2025-03-08 17:12:33,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:33,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:12:33,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:33,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:12:33,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:12:33,879 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-08 17:12:33,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 64 transitions, 414 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) [2025-03-08 17:12:33,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:33,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-08 17:12:33,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:34,006 INFO L124 PetriNetUnfolderBase]: 636/1275 cut-off events. [2025-03-08 17:12:34,007 INFO L125 PetriNetUnfolderBase]: For 849/849 co-relation queries the response was YES. [2025-03-08 17:12:34,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3088 conditions, 1275 events. 636/1275 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6250 event pairs, 210 based on Foata normal form. 62/1318 useless extension candidates. Maximal degree in co-relation 2939. Up to 605 conditions per place. [2025-03-08 17:12:34,014 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 42 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2025-03-08 17:12:34,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 372 flow [2025-03-08 17:12:34,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:12:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:12:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-08 17:12:34,016 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2025-03-08 17:12:34,016 INFO L175 Difference]: Start difference. First operand has 55 places, 64 transitions, 414 flow. Second operand 3 states and 58 transitions. [2025-03-08 17:12:34,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 372 flow [2025-03-08 17:12:34,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 324 flow, removed 24 selfloop flow, removed 3 redundant places. [2025-03-08 17:12:34,028 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 217 flow [2025-03-08 17:12:34,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2025-03-08 17:12:34,029 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 19 predicate places. [2025-03-08 17:12:34,029 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 217 flow [2025-03-08 17:12:34,029 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) [2025-03-08 17:12:34,029 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:34,029 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:34,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:12:34,029 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:34,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:34,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1401005569, now seen corresponding path program 1 times [2025-03-08 17:12:34,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:34,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905083408] [2025-03-08 17:12:34,030 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:34,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:34,040 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:12:34,068 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:12:34,068 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:34,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:34,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:34,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905083408] [2025-03-08 17:12:34,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905083408] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:12:34,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:12:34,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:12:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815076559] [2025-03-08 17:12:34,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:34,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:12:34,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:34,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:12:34,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:12:34,476 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:34,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 217 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) [2025-03-08 17:12:34,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:34,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:34,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:34,704 INFO L124 PetriNetUnfolderBase]: 820/1619 cut-off events. [2025-03-08 17:12:34,705 INFO L125 PetriNetUnfolderBase]: For 918/918 co-relation queries the response was YES. [2025-03-08 17:12:34,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3924 conditions, 1619 events. 820/1619 cut-off events. For 918/918 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8244 event pairs, 244 based on Foata normal form. 0/1598 useless extension candidates. Maximal degree in co-relation 3543. Up to 836 conditions per place. [2025-03-08 17:12:34,713 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 60 selfloop transitions, 13 changer transitions 6/84 dead transitions. [2025-03-08 17:12:34,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 508 flow [2025-03-08 17:12:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:12:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:12:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2025-03-08 17:12:34,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5529411764705883 [2025-03-08 17:12:34,715 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 217 flow. Second operand 5 states and 94 transitions. [2025-03-08 17:12:34,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 508 flow [2025-03-08 17:12:34,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 497 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:12:34,722 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 320 flow [2025-03-08 17:12:34,722 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2025-03-08 17:12:34,723 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2025-03-08 17:12:34,723 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 320 flow [2025-03-08 17:12:34,723 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) [2025-03-08 17:12:34,723 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:34,723 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:34,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:12:34,723 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:34,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:34,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1174496096, now seen corresponding path program 1 times [2025-03-08 17:12:34,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:34,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151771168] [2025-03-08 17:12:34,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:34,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:34,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:12:34,754 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:12:34,754 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:34,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:35,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:35,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151771168] [2025-03-08 17:12:35,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151771168] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:35,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97999643] [2025-03-08 17:12:35,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:35,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:35,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:35,337 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) [2025-03-08 17:12:35,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:12:35,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:12:35,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:12:35,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:35,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:35,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 17:12:35,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:35,461 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 [2025-03-08 17:12:35,522 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 [2025-03-08 17:12:35,603 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 [2025-03-08 17:12:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:35,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:35,933 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 [2025-03-08 17:12:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:35,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97999643] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:35,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:35,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2025-03-08 17:12:35,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371647894] [2025-03-08 17:12:35,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:35,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 17:12:35,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:35,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 17:12:35,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:12:35,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:35,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 320 flow. Second operand has 15 states, 15 states have (on average 10.6) internal successors, (159), 15 states have internal predecessors, (159), 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) [2025-03-08 17:12:35,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:35,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:35,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:37,030 INFO L124 PetriNetUnfolderBase]: 1517/2990 cut-off events. [2025-03-08 17:12:37,030 INFO L125 PetriNetUnfolderBase]: For 3290/3290 co-relation queries the response was YES. [2025-03-08 17:12:37,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7284 conditions, 2990 events. 1517/2990 cut-off events. For 3290/3290 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 15581 event pairs, 270 based on Foata normal form. 21/2997 useless extension candidates. Maximal degree in co-relation 6353. Up to 485 conditions per place. [2025-03-08 17:12:37,043 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 188 selfloop transitions, 43 changer transitions 22/258 dead transitions. [2025-03-08 17:12:37,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 258 transitions, 1504 flow [2025-03-08 17:12:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 17:12:37,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-08 17:12:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 393 transitions. [2025-03-08 17:12:37,046 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5504201680672269 [2025-03-08 17:12:37,046 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 320 flow. Second operand 21 states and 393 transitions. [2025-03-08 17:12:37,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 258 transitions, 1504 flow [2025-03-08 17:12:37,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 258 transitions, 1504 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 17:12:37,062 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 615 flow [2025-03-08 17:12:37,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=615, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2025-03-08 17:12:37,063 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 51 predicate places. [2025-03-08 17:12:37,063 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 615 flow [2025-03-08 17:12:37,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.6) internal successors, (159), 15 states have internal predecessors, (159), 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) [2025-03-08 17:12:37,063 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:37,063 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] [2025-03-08 17:12:37,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:12:37,263 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 [2025-03-08 17:12:37,264 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:37,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1981300099, now seen corresponding path program 1 times [2025-03-08 17:12:37,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:37,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892364256] [2025-03-08 17:12:37,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:37,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:37,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:12:37,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:12:37,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:37,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:37,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:37,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892364256] [2025-03-08 17:12:37,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892364256] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:37,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474003217] [2025-03-08 17:12:37,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:37,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:37,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:37,461 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) [2025-03-08 17:12:37,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:12:37,531 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:12:37,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:12:37,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:37,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:37,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:12:37,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:37,580 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 [2025-03-08 17:12:37,632 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 [2025-03-08 17:12:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:37,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:12:37,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474003217] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:37,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:12:37,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 11 [2025-03-08 17:12:37,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594244608] [2025-03-08 17:12:37,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:37,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:12:37,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:37,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:12:37,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:12:37,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:37,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 615 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) [2025-03-08 17:12:37,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:37,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:37,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:38,159 INFO L124 PetriNetUnfolderBase]: 1645/3252 cut-off events. [2025-03-08 17:12:38,160 INFO L125 PetriNetUnfolderBase]: For 5178/5178 co-relation queries the response was YES. [2025-03-08 17:12:38,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8405 conditions, 3252 events. 1645/3252 cut-off events. For 5178/5178 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 17584 event pairs, 338 based on Foata normal form. 12/3257 useless extension candidates. Maximal degree in co-relation 7805. Up to 1292 conditions per place. [2025-03-08 17:12:38,175 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 73 selfloop transitions, 41 changer transitions 2/121 dead transitions. [2025-03-08 17:12:38,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 1012 flow [2025-03-08 17:12:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:12:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:12:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2025-03-08 17:12:38,176 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2025-03-08 17:12:38,176 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 615 flow. Second operand 6 states and 112 transitions. [2025-03-08 17:12:38,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 1012 flow [2025-03-08 17:12:38,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 121 transitions, 985 flow, removed 9 selfloop flow, removed 2 redundant places. [2025-03-08 17:12:38,191 INFO L231 Difference]: Finished difference. Result has 87 places, 84 transitions, 755 flow [2025-03-08 17:12:38,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=755, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2025-03-08 17:12:38,193 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 55 predicate places. [2025-03-08 17:12:38,193 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 755 flow [2025-03-08 17:12:38,194 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) [2025-03-08 17:12:38,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:38,194 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] [2025-03-08 17:12:38,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:12:38,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:38,395 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:38,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:38,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1139498936, now seen corresponding path program 1 times [2025-03-08 17:12:38,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:38,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306893643] [2025-03-08 17:12:38,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:38,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:38,411 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 17:12:38,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:12:38,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:38,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:38,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:38,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306893643] [2025-03-08 17:12:38,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306893643] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:38,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552222602] [2025-03-08 17:12:38,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:38,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:38,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:38,928 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) [2025-03-08 17:12:38,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:12:38,995 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 17:12:39,015 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:12:39,016 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:39,016 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:39,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:12:39,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:39,056 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 [2025-03-08 17:12:39,131 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 [2025-03-08 17:12:39,134 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 [2025-03-08 17:12:39,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:12:39,170 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 [2025-03-08 17:12:39,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:12:39,529 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 [2025-03-08 17:12:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:39,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:40,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:12:40,024 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 18 treesize of output 14 [2025-03-08 17:12:40,044 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2025-03-08 17:12:40,044 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 81 treesize of output 68 [2025-03-08 17:12:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:40,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552222602] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:40,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:40,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-08 17:12:40,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610430771] [2025-03-08 17:12:40,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:40,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:12:40,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:40,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:12:40,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:12:40,103 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:40,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 755 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) [2025-03-08 17:12:40,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:40,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:40,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:42,280 INFO L124 PetriNetUnfolderBase]: 4093/8088 cut-off events. [2025-03-08 17:12:42,281 INFO L125 PetriNetUnfolderBase]: For 19173/19173 co-relation queries the response was YES. [2025-03-08 17:12:42,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21843 conditions, 8088 events. 4093/8088 cut-off events. For 19173/19173 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 50847 event pairs, 783 based on Foata normal form. 105/8186 useless extension candidates. Maximal degree in co-relation 20693. Up to 1343 conditions per place. [2025-03-08 17:12:42,322 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 258 selfloop transitions, 126 changer transitions 46/435 dead transitions. [2025-03-08 17:12:42,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 435 transitions, 3527 flow [2025-03-08 17:12:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-08 17:12:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-08 17:12:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 541 transitions. [2025-03-08 17:12:42,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5303921568627451 [2025-03-08 17:12:42,326 INFO L175 Difference]: Start difference. First operand has 87 places, 84 transitions, 755 flow. Second operand 30 states and 541 transitions. [2025-03-08 17:12:42,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 435 transitions, 3527 flow [2025-03-08 17:12:42,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 435 transitions, 3233 flow, removed 54 selfloop flow, removed 4 redundant places. [2025-03-08 17:12:42,384 INFO L231 Difference]: Finished difference. Result has 121 places, 172 transitions, 1900 flow [2025-03-08 17:12:42,385 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1900, PETRI_PLACES=121, PETRI_TRANSITIONS=172} [2025-03-08 17:12:42,386 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 89 predicate places. [2025-03-08 17:12:42,387 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 172 transitions, 1900 flow [2025-03-08 17:12:42,387 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) [2025-03-08 17:12:42,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:42,387 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-08 17:12:42,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 17:12:42,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:42,588 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:42,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1608716308, now seen corresponding path program 2 times [2025-03-08 17:12:42,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:42,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429522409] [2025-03-08 17:12:42,588 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:12:42,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:42,602 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-08 17:12:42,612 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 17:12:42,613 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:12:42,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:42,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:42,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429522409] [2025-03-08 17:12:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429522409] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:42,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041151786] [2025-03-08 17:12:42,809 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:12:42,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:42,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:42,811 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) [2025-03-08 17:12:42,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:12:42,886 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-08 17:12:42,908 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 17:12:42,909 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:12:42,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:42,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:12:42,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:42,929 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 [2025-03-08 17:12:42,949 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 [2025-03-08 17:12:42,969 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 [2025-03-08 17:12:42,992 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 [2025-03-08 17:12:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:43,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:43,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041151786] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:43,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:43,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2025-03-08 17:12:43,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438254117] [2025-03-08 17:12:43,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:43,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:12:43,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:43,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:12:43,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:12:43,136 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:43,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 172 transitions, 1900 flow. Second operand has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 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) [2025-03-08 17:12:43,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:43,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:43,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:45,662 INFO L124 PetriNetUnfolderBase]: 10777/21105 cut-off events. [2025-03-08 17:12:45,663 INFO L125 PetriNetUnfolderBase]: For 62553/62553 co-relation queries the response was YES. [2025-03-08 17:12:45,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61181 conditions, 21105 events. 10777/21105 cut-off events. For 62553/62553 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 163535 event pairs, 2273 based on Foata normal form. 386/21484 useless extension candidates. Maximal degree in co-relation 59370. Up to 3508 conditions per place. [2025-03-08 17:12:45,811 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 564 selfloop transitions, 391 changer transitions 2/962 dead transitions. [2025-03-08 17:12:45,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 962 transitions, 9081 flow [2025-03-08 17:12:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-03-08 17:12:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2025-03-08 17:12:45,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1021 transitions. [2025-03-08 17:12:45,815 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5362394957983193 [2025-03-08 17:12:45,816 INFO L175 Difference]: Start difference. First operand has 121 places, 172 transitions, 1900 flow. Second operand 56 states and 1021 transitions. [2025-03-08 17:12:45,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 962 transitions, 9081 flow [2025-03-08 17:12:46,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 962 transitions, 8717 flow, removed 180 selfloop flow, removed 1 redundant places. [2025-03-08 17:12:46,504 INFO L231 Difference]: Finished difference. Result has 195 places, 468 transitions, 6001 flow [2025-03-08 17:12:46,504 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=6001, PETRI_PLACES=195, PETRI_TRANSITIONS=468} [2025-03-08 17:12:46,505 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 163 predicate places. [2025-03-08 17:12:46,505 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 468 transitions, 6001 flow [2025-03-08 17:12:46,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 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) [2025-03-08 17:12:46,505 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:46,505 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2025-03-08 17:12:46,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 17:12:46,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:46,706 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:46,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:46,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1743029775, now seen corresponding path program 3 times [2025-03-08 17:12:46,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:46,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992558134] [2025-03-08 17:12:46,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:12:46,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:46,722 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 6 equivalence classes. [2025-03-08 17:12:46,755 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 17:12:46,755 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 17:12:46,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:46,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:46,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992558134] [2025-03-08 17:12:46,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992558134] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:46,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137263517] [2025-03-08 17:12:46,853 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:12:46,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:46,855 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) [2025-03-08 17:12:46,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:12:46,933 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 6 equivalence classes. [2025-03-08 17:12:46,983 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 17:12:46,983 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 17:12:46,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:46,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 17:12:46,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:47,023 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:12:47,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137263517] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:12:47,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:12:47,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2025-03-08 17:12:47,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696740128] [2025-03-08 17:12:47,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:47,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:12:47,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:47,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:12:47,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:12:47,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:47,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 468 transitions, 6001 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:47,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:47,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:47,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:49,192 INFO L124 PetriNetUnfolderBase]: 10154/19049 cut-off events. [2025-03-08 17:12:49,192 INFO L125 PetriNetUnfolderBase]: For 43807/43807 co-relation queries the response was YES. [2025-03-08 17:12:49,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52687 conditions, 19049 events. 10154/19049 cut-off events. For 43807/43807 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 141330 event pairs, 703 based on Foata normal form. 0/18120 useless extension candidates. Maximal degree in co-relation 52638. Up to 6190 conditions per place. [2025-03-08 17:12:49,334 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 293 selfloop transitions, 10 changer transitions 167/509 dead transitions. [2025-03-08 17:12:49,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 509 transitions, 6552 flow [2025-03-08 17:12:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:12:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:12:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2025-03-08 17:12:49,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6213235294117647 [2025-03-08 17:12:49,336 INFO L175 Difference]: Start difference. First operand has 195 places, 468 transitions, 6001 flow. Second operand 8 states and 169 transitions. [2025-03-08 17:12:49,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 509 transitions, 6552 flow [2025-03-08 17:12:49,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 509 transitions, 5967 flow, removed 120 selfloop flow, removed 18 redundant places. [2025-03-08 17:12:49,737 INFO L231 Difference]: Finished difference. Result has 166 places, 170 transitions, 1726 flow [2025-03-08 17:12:49,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1726, PETRI_PLACES=166, PETRI_TRANSITIONS=170} [2025-03-08 17:12:49,737 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 134 predicate places. [2025-03-08 17:12:49,737 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 170 transitions, 1726 flow [2025-03-08 17:12:49,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:49,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:49,737 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] [2025-03-08 17:12:49,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 17:12:49,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:49,938 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:49,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:49,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1635453765, now seen corresponding path program 2 times [2025-03-08 17:12:49,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:49,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395878715] [2025-03-08 17:12:49,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:12:49,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:49,949 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-08 17:12:49,969 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 17:12:49,974 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:12:49,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:50,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395878715] [2025-03-08 17:12:50,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395878715] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789703513] [2025-03-08 17:12:50,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:12:50,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:50,847 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) [2025-03-08 17:12:50,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:12:50,929 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-08 17:12:50,958 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 17:12:50,958 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:12:50,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:50,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 17:12:50,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:50,994 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 [2025-03-08 17:12:51,052 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 [2025-03-08 17:12:51,055 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 [2025-03-08 17:12:51,070 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 [2025-03-08 17:12:51,274 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 123 treesize of output 95 [2025-03-08 17:12:51,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:12:51,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2025-03-08 17:12:51,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:12:51,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 105 treesize of output 69 [2025-03-08 17:12:52,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:12:52,827 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 227 treesize of output 107 [2025-03-08 17:12:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:52,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:53,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789703513] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:53,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:53,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2025-03-08 17:12:53,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776392356] [2025-03-08 17:12:53,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:53,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 17:12:53,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:53,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 17:12:53,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2025-03-08 17:12:53,458 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:53,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 170 transitions, 1726 flow. Second operand has 27 states, 27 states have (on average 10.666666666666666) internal successors, (288), 27 states have internal predecessors, (288), 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) [2025-03-08 17:12:53,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:53,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:53,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:55,625 INFO L124 PetriNetUnfolderBase]: 5660/11414 cut-off events. [2025-03-08 17:12:55,626 INFO L125 PetriNetUnfolderBase]: For 38559/38987 co-relation queries the response was YES. [2025-03-08 17:12:55,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33417 conditions, 11414 events. 5660/11414 cut-off events. For 38559/38987 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 81404 event pairs, 597 based on Foata normal form. 217/11626 useless extension candidates. Maximal degree in co-relation 33380. Up to 1974 conditions per place. [2025-03-08 17:12:55,671 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 186 selfloop transitions, 51 changer transitions 272/513 dead transitions. [2025-03-08 17:12:55,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 513 transitions, 4191 flow [2025-03-08 17:12:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-08 17:12:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-03-08 17:12:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 526 transitions. [2025-03-08 17:12:55,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46880570409982175 [2025-03-08 17:12:55,673 INFO L175 Difference]: Start difference. First operand has 166 places, 170 transitions, 1726 flow. Second operand 33 states and 526 transitions. [2025-03-08 17:12:55,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 513 transitions, 4191 flow [2025-03-08 17:12:55,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 513 transitions, 4111 flow, removed 4 selfloop flow, removed 7 redundant places. [2025-03-08 17:12:55,774 INFO L231 Difference]: Finished difference. Result has 189 places, 95 transitions, 864 flow [2025-03-08 17:12:55,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=864, PETRI_PLACES=189, PETRI_TRANSITIONS=95} [2025-03-08 17:12:55,774 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 157 predicate places. [2025-03-08 17:12:55,774 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 95 transitions, 864 flow [2025-03-08 17:12:55,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.666666666666666) internal successors, (288), 27 states have internal predecessors, (288), 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) [2025-03-08 17:12:55,775 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:55,775 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] [2025-03-08 17:12:55,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 17:12:55,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:55,975 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:55,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:55,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2075091374, now seen corresponding path program 3 times [2025-03-08 17:12:55,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:55,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043692000] [2025-03-08 17:12:55,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:12:55,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:55,990 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-03-08 17:12:56,024 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 17:12:56,024 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 17:12:56,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:57,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:57,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043692000] [2025-03-08 17:12:57,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043692000] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:57,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517663634] [2025-03-08 17:12:57,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:12:57,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:57,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:57,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:12:57,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:12:57,171 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-03-08 17:12:57,246 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 17:12:57,246 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 17:12:57,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:57,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 17:12:57,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:57,292 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 [2025-03-08 17:12:57,350 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 62 treesize of output 46 [2025-03-08 17:12:57,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 64 [2025-03-08 17:12:57,383 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 34 treesize of output 23 [2025-03-08 17:12:57,525 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 111 treesize of output 83 [2025-03-08 17:12:57,528 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 83 treesize of output 99 [2025-03-08 17:12:57,544 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 79 treesize of output 57 [2025-03-08 17:12:57,978 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 209 treesize of output 157 [2025-03-08 17:12:57,985 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 157 treesize of output 159 [2025-03-08 17:12:58,007 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 160 treesize of output 120 [2025-03-08 17:13:01,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:13:01,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 399 treesize of output 207 [2025-03-08 17:13:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:01,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:02,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517663634] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:02,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:02,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2025-03-08 17:13:02,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342425926] [2025-03-08 17:13:02,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:02,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-08 17:13:02,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:02,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-08 17:13:02,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2025-03-08 17:13:02,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:13:02,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 95 transitions, 864 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) [2025-03-08 17:13:02,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:02,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:13:02,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:04,295 INFO L124 PetriNetUnfolderBase]: 1953/4207 cut-off events. [2025-03-08 17:13:04,295 INFO L125 PetriNetUnfolderBase]: For 13580/13636 co-relation queries the response was YES. [2025-03-08 17:13:04,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12016 conditions, 4207 events. 1953/4207 cut-off events. For 13580/13636 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 24419 event pairs, 214 based on Foata normal form. 53/4255 useless extension candidates. Maximal degree in co-relation 11969. Up to 753 conditions per place. [2025-03-08 17:13:04,317 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 109 selfloop transitions, 15 changer transitions 238/366 dead transitions. [2025-03-08 17:13:04,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 366 transitions, 2591 flow [2025-03-08 17:13:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-08 17:13:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-03-08 17:13:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 538 transitions. [2025-03-08 17:13:04,319 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45210084033613446 [2025-03-08 17:13:04,319 INFO L175 Difference]: Start difference. First operand has 189 places, 95 transitions, 864 flow. Second operand 35 states and 538 transitions. [2025-03-08 17:13:04,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 366 transitions, 2591 flow [2025-03-08 17:13:04,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 366 transitions, 2301 flow, removed 56 selfloop flow, removed 47 redundant places. [2025-03-08 17:13:04,347 INFO L231 Difference]: Finished difference. Result has 162 places, 45 transitions, 282 flow [2025-03-08 17:13:04,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=282, PETRI_PLACES=162, PETRI_TRANSITIONS=45} [2025-03-08 17:13:04,348 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 130 predicate places. [2025-03-08 17:13:04,348 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 45 transitions, 282 flow [2025-03-08 17:13:04,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2025-03-08 17:13:04,349 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:04,349 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:04,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 17:13:04,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-08 17:13:04,549 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:13:04,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash -113953919, now seen corresponding path program 4 times [2025-03-08 17:13:04,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:04,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601934709] [2025-03-08 17:13:04,550 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:13:04,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:04,564 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-03-08 17:13:04,632 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-08 17:13:04,632 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:13:04,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 47 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:05,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:05,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601934709] [2025-03-08 17:13:05,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601934709] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:05,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708388319] [2025-03-08 17:13:05,826 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:13:05,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:05,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:05,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:13:05,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:13:05,917 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-03-08 17:13:05,955 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-08 17:13:05,956 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:13:05,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:05,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:13:05,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:05,981 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 [2025-03-08 17:13:06,018 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 [2025-03-08 17:13:06,020 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 [2025-03-08 17:13:06,027 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 43 treesize of output 21 [2025-03-08 17:13:06,153 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 123 treesize of output 95 [2025-03-08 17:13:06,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:13:06,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2025-03-08 17:13:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 17:13:06,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2025-03-08 17:13:06,467 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 185 [2025-03-08 17:13:06,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:13:06,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 175 [2025-03-08 17:13:06,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 17:13:06,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 29 [2025-03-08 17:13:07,388 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 465 treesize of output 365 [2025-03-08 17:13:07,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:13:07,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 365 treesize of output 289 [2025-03-08 17:13:07,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:13:07,674 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 427 treesize of output 374 [2025-03-08 17:13:17,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:13:17,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 911 treesize of output 407 [2025-03-08 17:13:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:18,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:19,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:13:19,836 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 1 case distinctions, treesize of input 18 treesize of output 14 [2025-03-08 17:13:19,858 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2025-03-08 17:13:19,858 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 149 treesize of output 126 [2025-03-08 17:13:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:19,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708388319] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:19,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:19,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2025-03-08 17:13:19,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147783248] [2025-03-08 17:13:19,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:19,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-08 17:13:19,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:19,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-08 17:13:19,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 17:13:19,982 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:13:19,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 45 transitions, 282 flow. Second operand has 37 states, 37 states have (on average 11.297297297297296) internal successors, (418), 37 states have internal predecessors, (418), 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) [2025-03-08 17:13:19,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:19,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:13:19,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:22,090 INFO L124 PetriNetUnfolderBase]: 483/1047 cut-off events. [2025-03-08 17:13:22,090 INFO L125 PetriNetUnfolderBase]: For 1589/1589 co-relation queries the response was YES. [2025-03-08 17:13:22,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2834 conditions, 1047 events. 483/1047 cut-off events. For 1589/1589 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3431 event pairs, 39 based on Foata normal form. 14/1056 useless extension candidates. Maximal degree in co-relation 2800. Up to 174 conditions per place. [2025-03-08 17:13:22,092 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 0 selfloop transitions, 0 changer transitions 136/136 dead transitions. [2025-03-08 17:13:22,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 136 transitions, 803 flow [2025-03-08 17:13:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:13:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:13:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 261 transitions. [2025-03-08 17:13:22,093 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4264705882352941 [2025-03-08 17:13:22,093 INFO L175 Difference]: Start difference. First operand has 162 places, 45 transitions, 282 flow. Second operand 18 states and 261 transitions. [2025-03-08 17:13:22,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 136 transitions, 803 flow [2025-03-08 17:13:22,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 703 flow, removed 9 selfloop flow, removed 44 redundant places. [2025-03-08 17:13:22,096 INFO L231 Difference]: Finished difference. Result has 83 places, 0 transitions, 0 flow [2025-03-08 17:13:22,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=83, PETRI_TRANSITIONS=0} [2025-03-08 17:13:22,096 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 51 predicate places. [2025-03-08 17:13:22,097 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 0 transitions, 0 flow [2025-03-08 17:13:22,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 11.297297297297296) internal successors, (418), 37 states have internal predecessors, (418), 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) [2025-03-08 17:13:22,099 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2025-03-08 17:13:22,099 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2025-03-08 17:13:22,099 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2025-03-08 17:13:22,099 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-03-08 17:13:22,099 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-03-08 17:13:22,099 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-03-08 17:13:22,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 17:13:22,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:22,300 INFO L422 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1] [2025-03-08 17:13:22,304 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-08 17:13:22,304 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-08 17:13:22,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.03 05:13:22 BasicIcfg [2025-03-08 17:13:22,309 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-08 17:13:22,309 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-08 17:13:22,309 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-08 17:13:22,310 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-08 17:13:22,310 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:12:31" (3/4) ... [2025-03-08 17:13:22,311 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-08 17:13:22,313 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure t1 [2025-03-08 17:13:22,313 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure t2 [2025-03-08 17:13:22,315 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 32 nodes and edges [2025-03-08 17:13:22,316 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2025-03-08 17:13:22,316 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2025-03-08 17:13:22,316 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-08 17:13:22,368 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-08 17:13:22,368 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-08 17:13:22,368 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-08 17:13:22,369 INFO L158 Benchmark]: Toolchain (without parser) took 51524.32ms. Allocated memory was 167.8MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 121.0MB in the beginning and 1.4GB in the end (delta: -1.2GB). Peak memory consumption was 663.2MB. Max. memory is 16.1GB. [2025-03-08 17:13:22,369 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 119.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 17:13:22,369 INFO L158 Benchmark]: CACSL2BoogieTranslator took 450.59ms. Allocated memory is still 167.8MB. Free memory was 120.6MB in the beginning and 91.3MB in the end (delta: 29.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-03-08 17:13:22,370 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.01ms. Allocated memory is still 167.8MB. Free memory was 91.3MB in the beginning and 89.2MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 17:13:22,370 INFO L158 Benchmark]: Boogie Preprocessor took 26.97ms. Allocated memory is still 167.8MB. Free memory was 89.2MB in the beginning and 87.1MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 17:13:22,370 INFO L158 Benchmark]: IcfgBuilder took 510.75ms. Allocated memory is still 167.8MB. Free memory was 87.1MB in the beginning and 48.1MB in the end (delta: 39.0MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2025-03-08 17:13:22,370 INFO L158 Benchmark]: TraceAbstraction took 50433.63ms. Allocated memory was 167.8MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 47.3MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 579.3MB. Max. memory is 16.1GB. [2025-03-08 17:13:22,370 INFO L158 Benchmark]: Witness Printer took 58.58ms. Allocated memory is still 2.1GB. Free memory was 1.4GB in the beginning and 1.4GB in the end (delta: 4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 17:13:22,371 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 119.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 450.59ms. Allocated memory is still 167.8MB. Free memory was 120.6MB in the beginning and 91.3MB in the end (delta: 29.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.01ms. Allocated memory is still 167.8MB. Free memory was 91.3MB in the beginning and 89.2MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.97ms. Allocated memory is still 167.8MB. Free memory was 89.2MB in the beginning and 87.1MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 510.75ms. Allocated memory is still 167.8MB. Free memory was 87.1MB in the beginning and 48.1MB in the end (delta: 39.0MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * TraceAbstraction took 50433.63ms. Allocated memory was 167.8MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 47.3MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 579.3MB. Max. memory is 16.1GB. * Witness Printer took 58.58ms. Allocated memory is still 2.1GB. Free memory was 1.4GB in the beginning and 1.4GB in the end (delta: 4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 53 locations, 62 edges, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 50.3s, OverallIterations: 12, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 17.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3440 SdHoareTripleChecker+Valid, 4.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3436 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 371 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7420 IncrementalHoareTripleChecker+Invalid, 7791 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 371 mSolverCounterUnsat, 1 mSDtfsCounter, 7420 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 874 GetRequests, 558 SyntacticMatches, 3 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3598 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6001occurred in iteration=8, InterpolantAutomatonStates: 233, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 29.3s InterpolantComputationTime, 708 NumberOfCodeBlocks, 708 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 975 ConstructedInterpolants, 11 QuantifiedInterpolants, 64543 SizeOfPredicates, 121 NumberOfNonLiveVariables, 2059 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 29 InterpolantComputations, 5 PerfectInterpolantSequences, 249/1018 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-08 17:13:22,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE