./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem18_label20.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/eca-rers2012/Problem18_label20.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 839a6dcefe0eda0c15199e733b50fa28a6af9f9aed319dba01e519ca448457f3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 18:04:25,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 18:04:25,163 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 18:04:25,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 18:04:25,166 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 18:04:25,179 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 18:04:25,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 18:04:25,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 18:04:25,180 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 18:04:25,180 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 18:04:25,180 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 18:04:25,180 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 18:04:25,180 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 18:04:25,180 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 18:04:25,180 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 18:04:25,181 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 18:04:25,181 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 18:04:25,181 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 18:04:25,181 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 18:04:25,181 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 18:04:25,181 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 18:04:25,181 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 18:04:25,181 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 18:04:25,181 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 18:04:25,182 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 18:04:25,182 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 18:04:25,182 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 18:04:25,182 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 18:04:25,182 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 18:04:25,182 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 18:04:25,182 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 18:04:25,182 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 18:04:25,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 18:04:25,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 18:04:25,182 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 18:04:25,183 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 18:04:25,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 18:04:25,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 18:04:25,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 18:04:25,183 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 18:04:25,183 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 18:04:25,183 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 18:04:25,183 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 18:04:25,183 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 -> 839a6dcefe0eda0c15199e733b50fa28a6af9f9aed319dba01e519ca448457f3 [2025-02-07 18:04:25,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 18:04:25,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 18:04:25,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 18:04:25,411 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 18:04:25,411 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 18:04:25,413 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label20.c [2025-02-07 18:04:26,577 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/74b6b2109/383e0cf3626f4a4bad7f7f8aa36eec8d/FLAG7c98f80d9 [2025-02-07 18:04:27,118 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 18:04:27,119 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label20.c [2025-02-07 18:04:27,149 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/74b6b2109/383e0cf3626f4a4bad7f7f8aa36eec8d/FLAG7c98f80d9 [2025-02-07 18:04:27,170 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/74b6b2109/383e0cf3626f4a4bad7f7f8aa36eec8d [2025-02-07 18:04:27,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 18:04:27,176 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 18:04:27,179 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 18:04:27,182 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 18:04:27,186 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 18:04:27,187 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 06:04:27" (1/1) ... [2025-02-07 18:04:27,188 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c4969a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:27, skipping insertion in model container [2025-02-07 18:04:27,188 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 06:04:27" (1/1) ... [2025-02-07 18:04:27,290 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 18:04:27,486 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/eca-rers2012/Problem18_label20.c[1084,1097] [2025-02-07 18:04:28,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 18:04:28,029 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 18:04:28,042 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/eca-rers2012/Problem18_label20.c[1084,1097] [2025-02-07 18:04:28,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 18:04:28,339 INFO L204 MainTranslator]: Completed translation [2025-02-07 18:04:28,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28 WrapperNode [2025-02-07 18:04:28,341 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 18:04:28,343 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 18:04:28,343 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 18:04:28,343 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 18:04:28,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,395 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,634 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2025-02-07 18:04:28,635 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 18:04:28,636 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 18:04:28,636 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 18:04:28,636 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 18:04:28,644 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,680 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,730 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 18:04:28,731 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,731 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,775 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,784 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,879 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,907 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 18:04:28,909 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 18:04:28,909 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 18:04:28,909 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 18:04:28,910 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (1/1) ... [2025-02-07 18:04:28,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 18:04:28,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 18:04:28,936 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) [2025-02-07 18:04:28,939 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 [2025-02-07 18:04:28,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 18:04:28,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 18:04:28,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 18:04:28,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 18:04:29,009 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 18:04:29,010 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 18:04:32,300 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L1647: havoc calculate_output_#t~ret8#1;main_#t~ret11#1 := calculate_output_#res#1;havoc calculate_output_#t~ret8#1, calculate_output_~input#1;havoc calculate_output_#in~input#1;assume { :end_inline_calculate_output } true;assume -2147483648 <= main_#t~ret11#1 && main_#t~ret11#1 <= 2147483647;main_~output~0#1 := main_#t~ret11#1;havoc main_~input~0#1;havoc main_#t~ret11#1; [2025-02-07 18:04:32,304 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L3060: havoc calculate_output2_#t~ret9#1;calculate_output_#t~ret8#1 := calculate_output2_#res#1;havoc calculate_output2_#t~ret9#1, calculate_output2_~input#1;havoc calculate_output2_#in~input#1;assume { :end_inline_calculate_output2 } true;assume -2147483648 <= calculate_output_#t~ret8#1 && calculate_output_#t~ret8#1 <= 2147483647;calculate_output_#res#1 := calculate_output_#t~ret8#1;havoc calculate_output_#t~ret8#1; [2025-02-07 18:04:32,304 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L3060-2: calculate_output2_#t~ret9#1 := calculate_output3_#res#1;havoc calculate_output3_~input#1;havoc calculate_output3_#in~input#1;assume { :end_inline_calculate_output3 } true;assume -2147483648 <= calculate_output2_#t~ret9#1 && calculate_output2_#t~ret9#1 <= 2147483647;calculate_output2_#res#1 := calculate_output2_#t~ret9#1;havoc calculate_output2_#t~ret9#1; [2025-02-07 18:04:32,486 INFO L? ?]: Removed 1259 outVars from TransFormulas that were not future-live. [2025-02-07 18:04:32,486 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 18:04:32,524 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 18:04:32,524 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 18:04:32,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 06:04:32 BoogieIcfgContainer [2025-02-07 18:04:32,528 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 18:04:32,530 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 18:04:32,530 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 18:04:32,533 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 18:04:32,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 06:04:27" (1/3) ... [2025-02-07 18:04:32,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b411867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 06:04:32, skipping insertion in model container [2025-02-07 18:04:32,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:04:28" (2/3) ... [2025-02-07 18:04:32,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b411867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 06:04:32, skipping insertion in model container [2025-02-07 18:04:32,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 06:04:32" (3/3) ... [2025-02-07 18:04:32,537 INFO L128 eAbstractionObserver]: Analyzing ICFG Problem18_label20.c [2025-02-07 18:04:32,547 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 18:04:32,548 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem18_label20.c that has 1 procedures, 696 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-07 18:04:32,600 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 18:04:32,608 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;@7a4de01a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 18:04:32,608 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 18:04:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 696 states, 690 states have (on average 1.9971014492753623) internal successors, (1378), 695 states have internal predecessors, (1378), 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) [2025-02-07 18:04:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-02-07 18:04:32,615 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 18:04:32,615 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-02-07 18:04:32,616 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 18:04:32,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 18:04:32,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1951521756, now seen corresponding path program 1 times [2025-02-07 18:04:32,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 18:04:32,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356005768] [2025-02-07 18:04:32,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 18:04:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 18:04:32,673 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-07 18:04:32,683 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-07 18:04:32,683 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 18:04:32,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 18:04:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 18:04:32,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 18:04:32,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356005768] [2025-02-07 18:04:32,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356005768] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 18:04:32,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 18:04:32,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 18:04:32,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166096520] [2025-02-07 18:04:32,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 18:04:32,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 18:04:32,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 18:04:32,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 18:04:32,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 18:04:32,772 INFO L87 Difference]: Start difference. First operand has 696 states, 690 states have (on average 1.9971014492753623) internal successors, (1378), 695 states have internal predecessors, (1378), 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2025-02-07 18:04:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 18:04:34,642 INFO L93 Difference]: Finished difference Result 1386 states and 2746 transitions. [2025-02-07 18:04:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 18:04:34,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) Word has length 5 [2025-02-07 18:04:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 18:04:34,647 INFO L225 Difference]: With dead ends: 1386 [2025-02-07 18:04:34,647 INFO L226 Difference]: Without dead ends: 0 [2025-02-07 18:04:34,651 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 18:04:34,653 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 707 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-02-07 18:04:34,654 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 4 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-02-07 18:04:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-07 18:04:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-07 18:04:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2025-02-07 18:04:34,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-07 18:04:34,669 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2025-02-07 18:04:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 18:04:34,670 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-07 18:04:34,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2025-02-07 18:04:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-07 18:04:34,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-07 18:04:34,671 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-07 18:04:34,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 18:04:34,674 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-02-07 18:04:34,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-02-07 18:04:34,685 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-07 18:04:34,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 06:04:34 BoogieIcfgContainer [2025-02-07 18:04:34,695 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-07 18:04:34,695 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-07 18:04:34,695 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-07 18:04:34,696 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-07 18:04:34,696 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 06:04:32" (3/4) ... [2025-02-07 18:04:34,697 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-07 18:04:34,726 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2025-02-07 18:04:34,729 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-07 18:04:34,733 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-07 18:04:34,738 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-07 18:04:34,976 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-07 18:04:34,976 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-07 18:04:34,976 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-07 18:04:34,977 INFO L158 Benchmark]: Toolchain (without parser) took 7801.60ms. Allocated memory was 167.8MB in the beginning and 335.5MB in the end (delta: 167.8MB). Free memory was 119.9MB in the beginning and 216.8MB in the end (delta: -97.0MB). Peak memory consumption was 222.4MB. Max. memory is 16.1GB. [2025-02-07 18:04:34,977 INFO L158 Benchmark]: CDTParser took 0.76ms. Allocated memory is still 192.9MB. Free memory is still 117.7MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 18:04:34,977 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1163.88ms. Allocated memory is still 167.8MB. Free memory was 119.9MB in the beginning and 88.3MB in the end (delta: 31.6MB). Peak memory consumption was 101.2MB. Max. memory is 16.1GB. [2025-02-07 18:04:34,978 INFO L158 Benchmark]: Boogie Procedure Inliner took 291.87ms. Allocated memory is still 167.8MB. Free memory was 88.3MB in the beginning and 99.5MB in the end (delta: -11.2MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. [2025-02-07 18:04:34,978 INFO L158 Benchmark]: Boogie Preprocessor took 271.24ms. Allocated memory is still 167.8MB. Free memory was 99.5MB in the beginning and 91.1MB in the end (delta: 8.5MB). Peak memory consumption was 66.2MB. Max. memory is 16.1GB. [2025-02-07 18:04:34,978 INFO L158 Benchmark]: IcfgBuilder took 3619.57ms. Allocated memory was 167.8MB in the beginning and 335.5MB in the end (delta: 167.8MB). Free memory was 91.1MB in the beginning and 218.4MB in the end (delta: -127.4MB). Peak memory consumption was 203.5MB. Max. memory is 16.1GB. [2025-02-07 18:04:34,978 INFO L158 Benchmark]: TraceAbstraction took 2164.87ms. Allocated memory is still 335.5MB. Free memory was 218.4MB in the beginning and 79.3MB in the end (delta: 139.1MB). Peak memory consumption was 134.2MB. Max. memory is 16.1GB. [2025-02-07 18:04:34,978 INFO L158 Benchmark]: Witness Printer took 280.80ms. Allocated memory is still 335.5MB. Free memory was 79.3MB in the beginning and 216.8MB in the end (delta: -137.6MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2025-02-07 18:04:34,980 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.76ms. Allocated memory is still 192.9MB. Free memory is still 117.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1163.88ms. Allocated memory is still 167.8MB. Free memory was 119.9MB in the beginning and 88.3MB in the end (delta: 31.6MB). Peak memory consumption was 101.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 291.87ms. Allocated memory is still 167.8MB. Free memory was 88.3MB in the beginning and 99.5MB in the end (delta: -11.2MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 271.24ms. Allocated memory is still 167.8MB. Free memory was 99.5MB in the beginning and 91.1MB in the end (delta: 8.5MB). Peak memory consumption was 66.2MB. Max. memory is 16.1GB. * IcfgBuilder took 3619.57ms. Allocated memory was 167.8MB in the beginning and 335.5MB in the end (delta: 167.8MB). Free memory was 91.1MB in the beginning and 218.4MB in the end (delta: -127.4MB). Peak memory consumption was 203.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2164.87ms. Allocated memory is still 335.5MB. Free memory was 218.4MB in the beginning and 79.3MB in the end (delta: 139.1MB). Peak memory consumption was 134.2MB. Max. memory is 16.1GB. * Witness Printer took 280.80ms. Allocated memory is still 335.5MB. Free memory was 79.3MB in the beginning and 216.8MB in the end (delta: -137.6MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 37]: 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 CFG has 1 procedures, 696 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 707 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 707 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 371 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1193 IncrementalHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 371 mSolverCounterUnsat, 4 mSDtfsCounter, 1193 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=696occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - InvariantResult [Line: 4269]: Location Invariant Derived location invariant: (3 <= a24) RESULT: Ultimate proved your program to be correct! [2025-02-07 18:04:34,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE