./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 01:16:03,272 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 01:16:03,322 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-08 01:16:03,330 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 01:16:03,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 01:16:03,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 01:16:03,351 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 01:16:03,351 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 01:16:03,352 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 01:16:03,352 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 01:16:03,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 01:16:03,353 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 01:16:03,353 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 01:16:03,353 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 01:16:03,353 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 01:16:03,353 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 01:16:03,354 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 01:16:03,354 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 01:16:03,354 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 01:16:03,354 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 01:16:03,354 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 01:16:03,354 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 01:16:03,354 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 01:16:03,354 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 01:16:03,354 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 01:16:03,354 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 01:16:03,355 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 01:16:03,355 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 01:16:03,355 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 01:16:03,355 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 01:16:03,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 01:16:03,355 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 01:16:03,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:16:03,355 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 01:16:03,356 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 01:16:03,356 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 01:16:03,356 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 01:16:03,356 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 01:16:03,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 01:16:03,356 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 01:16:03,356 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 01:16:03,356 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 01:16:03,356 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 01:16:03,356 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2025-02-08 01:16:03,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 01:16:03,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 01:16:03,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 01:16:03,658 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 01:16:03,658 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 01:16:03,659 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-02-08 01:16:04,798 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f37f20890/0550567318f84ca980f808b64a57478c/FLAGcbcb55b10 [2025-02-08 01:16:05,054 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 01:16:05,056 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-02-08 01:16:05,062 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f37f20890/0550567318f84ca980f808b64a57478c/FLAGcbcb55b10 [2025-02-08 01:16:05,358 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f37f20890/0550567318f84ca980f808b64a57478c [2025-02-08 01:16:05,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 01:16:05,362 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 01:16:05,363 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 01:16:05,363 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 01:16:05,366 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 01:16:05,366 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c7e046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05, skipping insertion in model container [2025-02-08 01:16:05,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,384 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 01:16:05,555 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2025-02-08 01:16:05,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:16:05,576 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 01:16:05,604 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2025-02-08 01:16:05,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:16:05,626 INFO L204 MainTranslator]: Completed translation [2025-02-08 01:16:05,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05 WrapperNode [2025-02-08 01:16:05,627 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 01:16:05,628 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 01:16:05,629 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 01:16:05,629 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 01:16:05,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,639 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,659 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 289 [2025-02-08 01:16:05,660 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 01:16:05,661 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 01:16:05,661 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 01:16:05,661 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 01:16:05,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,670 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,682 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-02-08 01:16:05,682 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,682 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,693 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,696 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,697 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,704 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 01:16:05,705 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 01:16:05,705 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 01:16:05,705 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 01:16:05,706 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (1/1) ... [2025-02-08 01:16:05,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:16:05,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:16:05,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 01:16:05,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 01:16:05,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 01:16:05,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 01:16:05,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 01:16:05,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 01:16:05,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 01:16:05,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 01:16:05,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 01:16:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-08 01:16:05,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-08 01:16:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 01:16:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 01:16:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 01:16:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 01:16:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 01:16:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 01:16:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 01:16:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 01:16:05,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 01:16:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 01:16:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 01:16:05,753 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 01:16:05,837 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 01:16:05,839 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 01:16:05,993 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L93: ~cond~2#1 := (if 0 == (if ~i~0 < ~N~0 || ~q1_front~0 < ~q1_back~0 then 1 else 0) then 0 else 1); [2025-02-08 01:16:05,993 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90: havoc #t~ret10#1; [2025-02-08 01:16:05,993 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-1: havoc #t~mem9#1; [2025-02-08 01:16:05,993 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-2: ~total~0 := #t~ret10#1; [2025-02-08 01:16:05,994 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-3: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret10#1 && #t~ret10#1 <= 2147483647; [2025-02-08 01:16:05,994 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-4: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 01:16:05,994 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-5: havoc plus_~a#1, plus_~b#1; [2025-02-08 01:16:05,994 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L90-6: #t~ret10#1 := plus_#res#1; [2025-02-08 01:16:05,994 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L95: [2025-02-08 01:16:05,994 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L91: havoc #t~post11#1; [2025-02-08 01:16:05,994 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L91-1: ~q1_front~0 := 1 + #t~post11#1; [2025-02-08 01:16:05,994 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L91-2: #t~post11#1 := ~q1_front~0; [2025-02-08 01:16:05,994 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L92: [2025-02-08 01:16:06,051 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L110: [2025-02-08 01:16:06,051 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L111: ~cond~3#1 := (if 0 == (if ~j~0 < ~M~0 || ~q2_front~0 < ~q2_back~0 then 1 else 0) then 0 else 1); [2025-02-08 01:16:06,051 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108: havoc #t~ret13#1; [2025-02-08 01:16:06,051 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-1: havoc #t~mem12#1; [2025-02-08 01:16:06,051 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-2: ~total~0 := #t~ret13#1; [2025-02-08 01:16:06,051 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-3: assume { :end_inline_plus } true;assume -2147483648 <= #t~ret13#1 && #t~ret13#1 <= 2147483647; [2025-02-08 01:16:06,051 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-4: havoc plus_#in~a#1, plus_#in~b#1; [2025-02-08 01:16:06,051 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-5: havoc plus_~a#1, plus_~b#1; [2025-02-08 01:16:06,051 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L108-6: #t~ret13#1 := plus_#res#1; [2025-02-08 01:16:06,051 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L113: [2025-02-08 01:16:06,052 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L109: havoc #t~post14#1; [2025-02-08 01:16:06,052 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L109-1: ~q2_front~0 := 1 + #t~post14#1; [2025-02-08 01:16:06,052 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L109-2: #t~post14#1 := ~q2_front~0; [2025-02-08 01:16:06,188 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 01:16:06,188 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 01:16:06,431 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L169 is not an error location. [2025-02-08 01:16:06,431 WARN L149 AtomicBlockAnalyzer]: Unexpected successor node of atomic block begin: L169 is not an error location. [2025-02-08 01:16:06,432 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 01:16:06,432 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 01:16:06,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:16:06 BoogieIcfgContainer [2025-02-08 01:16:06,432 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 01:16:06,434 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 01:16:06,434 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 01:16:06,437 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 01:16:06,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 01:16:05" (1/3) ... [2025-02-08 01:16:06,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392590c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:16:06, skipping insertion in model container [2025-02-08 01:16:06,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:16:05" (2/3) ... [2025-02-08 01:16:06,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392590c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:16:06, skipping insertion in model container [2025-02-08 01:16:06,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:16:06" (3/3) ... [2025-02-08 01:16:06,439 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2025-02-08 01:16:06,450 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 01:16:06,452 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt2.wvr.c that has 5 procedures, 43 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-02-08 01:16:06,452 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 01:16:06,510 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-08 01:16:06,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 120 flow [2025-02-08 01:16:06,574 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2025-02-08 01:16:06,576 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-08 01:16:06,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 42 events. 4/42 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2025-02-08 01:16:06,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 120 flow [2025-02-08 01:16:06,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 41 transitions, 106 flow [2025-02-08 01:16:06,595 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 01:16:06,602 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;@3aa71df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 01:16:06,602 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-02-08 01:16:06,612 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 01:16:06,613 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2025-02-08 01:16:06,613 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-08 01:16:06,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:16:06,613 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:16:06,614 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 01:16:06,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:16:06,618 INFO L85 PathProgramCache]: Analyzing trace with hash -422943211, now seen corresponding path program 1 times [2025-02-08 01:16:06,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:16:06,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766264779] [2025-02-08 01:16:06,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:16:06,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:16:06,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 01:16:06,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 01:16:06,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:16:06,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:16:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:16:07,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:16:07,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766264779] [2025-02-08 01:16:07,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766264779] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:16:07,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:16:07,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 01:16:07,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058341471] [2025-02-08 01:16:07,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:16:07,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 01:16:07,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:16:07,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 01:16:07,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-02-08 01:16:07,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2025-02-08 01:16:07,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:16:07,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:16:07,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2025-02-08 01:16:07,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:16:07,916 INFO L124 PetriNetUnfolderBase]: 2640/3953 cut-off events. [2025-02-08 01:16:07,916 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2025-02-08 01:16:07,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7835 conditions, 3953 events. 2640/3953 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21931 event pairs, 279 based on Foata normal form. 170/4083 useless extension candidates. Maximal degree in co-relation 7641. Up to 2424 conditions per place. [2025-02-08 01:16:07,945 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 57 selfloop transitions, 4 changer transitions 6/76 dead transitions. [2025-02-08 01:16:07,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 328 flow [2025-02-08 01:16:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 01:16:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 01:16:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2025-02-08 01:16:07,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5782608695652174 [2025-02-08 01:16:07,958 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 106 flow. Second operand 5 states and 133 transitions. [2025-02-08 01:16:07,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 328 flow [2025-02-08 01:16:07,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 76 transitions, 300 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-08 01:16:07,975 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 102 flow [2025-02-08 01:16:07,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2025-02-08 01:16:07,979 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2025-02-08 01:16:07,979 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 102 flow [2025-02-08 01:16:07,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:16:07,980 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:16:07,980 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:16:07,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 01:16:07,980 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 01:16:07,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:16:07,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1819048476, now seen corresponding path program 1 times [2025-02-08 01:16:07,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:16:07,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508326789] [2025-02-08 01:16:07,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:16:07,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:16:07,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-08 01:16:08,017 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 01:16:08,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:16:08,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:16:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:16:08,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:16:08,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508326789] [2025-02-08 01:16:08,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508326789] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:16:08,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:16:08,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 01:16:08,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643319442] [2025-02-08 01:16:08,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:16:08,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 01:16:08,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:16:08,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 01:16:08,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 01:16:08,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2025-02-08 01:16:08,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:16:08,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:16:08,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2025-02-08 01:16:08,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:16:08,619 INFO L124 PetriNetUnfolderBase]: 1557/2450 cut-off events. [2025-02-08 01:16:08,619 INFO L125 PetriNetUnfolderBase]: For 522/522 co-relation queries the response was YES. [2025-02-08 01:16:08,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5231 conditions, 2450 events. 1557/2450 cut-off events. For 522/522 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12813 event pairs, 269 based on Foata normal form. 175/2611 useless extension candidates. Maximal degree in co-relation 848. Up to 1367 conditions per place. [2025-02-08 01:16:08,631 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 41 selfloop transitions, 3 changer transitions 26/79 dead transitions. [2025-02-08 01:16:08,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 79 transitions, 337 flow [2025-02-08 01:16:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 01:16:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 01:16:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2025-02-08 01:16:08,633 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2025-02-08 01:16:08,633 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 102 flow. Second operand 6 states and 150 transitions. [2025-02-08 01:16:08,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 79 transitions, 337 flow [2025-02-08 01:16:08,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 79 transitions, 329 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 01:16:08,636 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 110 flow [2025-02-08 01:16:08,636 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2025-02-08 01:16:08,636 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2025-02-08 01:16:08,636 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 110 flow [2025-02-08 01:16:08,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:16:08,637 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:16:08,637 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:16:08,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 01:16:08,637 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-02-08 01:16:08,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:16:08,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1785628202, now seen corresponding path program 2 times [2025-02-08 01:16:08,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:16:08,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330734440] [2025-02-08 01:16:08,638 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:16:08,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:16:08,647 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 1 equivalence classes. [2025-02-08 01:16:08,660 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 01:16:08,660 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-08 01:16:08,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:16:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:16:08,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:16:08,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330734440] [2025-02-08 01:16:08,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330734440] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:16:08,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:16:08,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 01:16:08,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613825524] [2025-02-08 01:16:08,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:16:08,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 01:16:08,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:16:08,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 01:16:08,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 01:16:08,788 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2025-02-08 01:16:08,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:16:08,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:16:08,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2025-02-08 01:16:08,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:16:08,979 INFO L124 PetriNetUnfolderBase]: 792/1312 cut-off events. [2025-02-08 01:16:08,979 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2025-02-08 01:16:08,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2937 conditions, 1312 events. 792/1312 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6440 event pairs, 111 based on Foata normal form. 111/1411 useless extension candidates. Maximal degree in co-relation 2930. Up to 463 conditions per place. [2025-02-08 01:16:08,983 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 0 selfloop transitions, 0 changer transitions 62/62 dead transitions. [2025-02-08 01:16:08,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 266 flow [2025-02-08 01:16:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 01:16:08,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 01:16:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2025-02-08 01:16:08,984 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2025-02-08 01:16:08,984 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 110 flow. Second operand 5 states and 120 transitions. [2025-02-08 01:16:08,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 266 flow [2025-02-08 01:16:08,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 62 transitions, 260 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 01:16:08,985 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2025-02-08 01:16:08,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2025-02-08 01:16:08,985 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2025-02-08 01:16:08,986 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2025-02-08 01:16:08,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:16:08,988 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2025-02-08 01:16:08,988 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2025-02-08 01:16:08,988 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2025-02-08 01:16:08,988 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2025-02-08 01:16:08,988 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2025-02-08 01:16:08,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 01:16:08,988 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1] [2025-02-08 01:16:08,991 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-08 01:16:08,991 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-08 01:16:08,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.02 01:16:08 BasicIcfg [2025-02-08 01:16:08,994 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-08 01:16:08,995 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-08 01:16:08,995 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-08 01:16:08,995 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-08 01:16:08,995 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:16:06" (3/4) ... [2025-02-08 01:16:08,997 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-08 01:16:08,999 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread1 [2025-02-08 01:16:08,999 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread2 [2025-02-08 01:16:08,999 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread3 [2025-02-08 01:16:08,999 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread4 [2025-02-08 01:16:09,003 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 118 nodes and edges [2025-02-08 01:16:09,003 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 53 nodes and edges [2025-02-08 01:16:09,004 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 27 nodes and edges [2025-02-08 01:16:09,004 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2025-02-08 01:16:09,004 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-08 01:16:09,061 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-08 01:16:09,061 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-08 01:16:09,061 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-08 01:16:09,062 INFO L158 Benchmark]: Toolchain (without parser) took 3701.14ms. Allocated memory was 142.6MB in the beginning and 402.7MB in the end (delta: 260.0MB). Free memory was 111.8MB in the beginning and 336.5MB in the end (delta: -224.7MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. [2025-02-08 01:16:09,062 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 122.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 01:16:09,062 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.41ms. Allocated memory is still 142.6MB. Free memory was 111.8MB in the beginning and 98.9MB in the end (delta: 12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 01:16:09,063 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.93ms. Allocated memory is still 142.6MB. Free memory was 98.9MB in the beginning and 96.5MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 01:16:09,063 INFO L158 Benchmark]: Boogie Preprocessor took 42.98ms. Allocated memory is still 142.6MB. Free memory was 96.5MB in the beginning and 93.9MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-08 01:16:09,063 INFO L158 Benchmark]: IcfgBuilder took 727.37ms. Allocated memory is still 142.6MB. Free memory was 93.9MB in the beginning and 82.3MB in the end (delta: 11.6MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2025-02-08 01:16:09,063 INFO L158 Benchmark]: TraceAbstraction took 2560.03ms. Allocated memory was 142.6MB in the beginning and 402.7MB in the end (delta: 260.0MB). Free memory was 81.5MB in the beginning and 340.8MB in the end (delta: -259.2MB). Peak memory consumption was 204.6MB. Max. memory is 16.1GB. [2025-02-08 01:16:09,063 INFO L158 Benchmark]: Witness Printer took 66.81ms. Allocated memory is still 402.7MB. Free memory was 340.8MB in the beginning and 336.5MB in the end (delta: 4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-08 01:16:09,064 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 122.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 265.41ms. Allocated memory is still 142.6MB. Free memory was 111.8MB in the beginning and 98.9MB in the end (delta: 12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.93ms. Allocated memory is still 142.6MB. Free memory was 98.9MB in the beginning and 96.5MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.98ms. Allocated memory is still 142.6MB. Free memory was 96.5MB in the beginning and 93.9MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 727.37ms. Allocated memory is still 142.6MB. Free memory was 93.9MB in the beginning and 82.3MB in the end (delta: 11.6MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * TraceAbstraction took 2560.03ms. Allocated memory was 142.6MB in the beginning and 402.7MB in the end (delta: 260.0MB). Free memory was 81.5MB in the beginning and 340.8MB in the end (delta: -259.2MB). Peak memory consumption was 204.6MB. Max. memory is 16.1GB. * Witness Printer took 66.81ms. Allocated memory is still 402.7MB. Free memory was 340.8MB in the beginning and 336.5MB in the end (delta: 4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 150]: 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 9 procedures, 71 locations, 5 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: 2.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 109 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 103 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 378 IncrementalHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 4 mSDtfsCounter, 378 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=2, InterpolantAutomatonStates: 16, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 320 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-08 01:16:09,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/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