./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_01.i --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/array-examples/standard_two_index_01.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 49688e6ac5964d079e81b93cbef6c2e6f5f14699441dc6a4423fa686d49b3f7f --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 16:50:47,799 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 16:50:47,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 16:50:47,852 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 16:50:47,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 16:50:47,871 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 16:50:47,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 16:50:47,872 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 16:50:47,873 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 16:50:47,873 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 16:50:47,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 16:50:47,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 16:50:47,874 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 16:50:47,874 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 16:50:47,874 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 16:50:47,874 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 16:50:47,875 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 16:50:47,875 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 16:50:47,875 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 16:50:47,875 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 16:50:47,875 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 16:50:47,875 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 16:50:47,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 16:50:47,876 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 16:50:47,876 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 16:50:47,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 16:50:47,876 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 16:50:47,876 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 16:50:47,876 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 16:50:47,876 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 16:50:47,876 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 16:50:47,876 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 16:50:47,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 16:50:47,876 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 16:50:47,877 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 16:50:47,877 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 16:50:47,877 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 16:50:47,877 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 16:50:47,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 16:50:47,877 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 16:50:47,877 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 16:50:47,878 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 16:50:47,878 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 16:50:47,878 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 -> 49688e6ac5964d079e81b93cbef6c2e6f5f14699441dc6a4423fa686d49b3f7f [2025-02-07 16:50:48,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 16:50:48,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 16:50:48,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 16:50:48,133 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 16:50:48,133 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 16:50:48,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_01.i [2025-02-07 16:50:49,254 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5954f9eee/bb6f58c874984d23a8deca161d68a570/FLAG7474a7fff [2025-02-07 16:50:49,471 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 16:50:49,472 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_01.i [2025-02-07 16:50:49,479 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5954f9eee/bb6f58c874984d23a8deca161d68a570/FLAG7474a7fff [2025-02-07 16:50:49,834 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5954f9eee/bb6f58c874984d23a8deca161d68a570 [2025-02-07 16:50:49,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 16:50:49,837 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 16:50:49,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 16:50:49,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 16:50:49,840 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 16:50:49,841 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:49,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15641327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49, skipping insertion in model container [2025-02-07 16:50:49,841 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:49,852 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 16:50:49,943 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/array-examples/standard_two_index_01.i[814,827] [2025-02-07 16:50:49,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 16:50:49,959 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 16:50:49,966 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/array-examples/standard_two_index_01.i[814,827] [2025-02-07 16:50:49,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 16:50:49,979 INFO L204 MainTranslator]: Completed translation [2025-02-07 16:50:49,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49 WrapperNode [2025-02-07 16:50:49,980 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 16:50:49,980 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 16:50:49,980 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 16:50:49,980 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 16:50:49,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:49,990 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:49,999 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2025-02-07 16:50:49,999 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 16:50:50,000 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 16:50:50,000 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 16:50:50,000 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 16:50:50,005 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:50,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:50,006 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:50,013 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 2, 3]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2025-02-07 16:50:50,013 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:50,014 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:50,016 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:50,017 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:50,018 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:50,018 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:50,019 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 16:50:50,020 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 16:50:50,020 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 16:50:50,020 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 16:50:50,020 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (1/1) ... [2025-02-07 16:50:50,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 16:50:50,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:50:50,048 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 16:50:50,053 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 16:50:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 16:50:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 16:50:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 16:50:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 16:50:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 16:50:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 16:50:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 16:50:50,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 16:50:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 16:50:50,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 16:50:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 16:50:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 16:50:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 16:50:50,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 16:50:50,118 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 16:50:50,119 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 16:50:50,233 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L17: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset;call ULTIMATE.dealloc(main_~#b~0#1.base, main_~#b~0#1.offset);havoc main_~#b~0#1.base, main_~#b~0#1.offset; [2025-02-07 16:50:50,242 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-02-07 16:50:50,242 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 16:50:50,249 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 16:50:50,252 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 16:50:50,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 04:50:50 BoogieIcfgContainer [2025-02-07 16:50:50,252 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 16:50:50,254 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 16:50:50,255 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 16:50:50,258 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 16:50:50,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 04:50:49" (1/3) ... [2025-02-07 16:50:50,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2af1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 04:50:50, skipping insertion in model container [2025-02-07 16:50:50,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 04:50:49" (2/3) ... [2025-02-07 16:50:50,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2af1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 04:50:50, skipping insertion in model container [2025-02-07 16:50:50,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 04:50:50" (3/3) ... [2025-02-07 16:50:50,261 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_two_index_01.i [2025-02-07 16:50:50,273 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 16:50:50,274 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_two_index_01.i that has 1 procedures, 11 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-07 16:50:50,319 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 16:50:50,328 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;@3c345a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 16:50:50,328 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 16:50:50,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 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 16:50:50,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-07 16:50:50,334 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:50:50,335 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-07 16:50:50,335 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:50:50,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:50:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1299700829, now seen corresponding path program 1 times [2025-02-07 16:50:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:50:50,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666351738] [2025-02-07 16:50:50,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:50:50,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:50:50,410 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-07 16:50:50,426 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-07 16:50:50,426 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:50:50,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:50:50,523 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 16:50:50,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:50:50,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666351738] [2025-02-07 16:50:50,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666351738] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 16:50:50,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 16:50:50,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 16:50:50,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888126811] [2025-02-07 16:50:50,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 16:50:50,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 16:50:50,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:50:50,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 16:50:50,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 16:50:50,545 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 16:50:50,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:50:50,574 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2025-02-07 16:50:50,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 16:50:50,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2025-02-07 16:50:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:50:50,579 INFO L225 Difference]: With dead ends: 27 [2025-02-07 16:50:50,579 INFO L226 Difference]: Without dead ends: 15 [2025-02-07 16:50:50,581 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 16:50:50,582 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:50:50,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:50:50,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-02-07 16:50:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2025-02-07 16:50:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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 16:50:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2025-02-07 16:50:50,605 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2025-02-07 16:50:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:50:50,605 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2025-02-07 16:50:50,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 16:50:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2025-02-07 16:50:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 16:50:50,606 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:50:50,606 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 16:50:50,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 16:50:50,607 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:50:50,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:50:50,607 INFO L85 PathProgramCache]: Analyzing trace with hash 123715037, now seen corresponding path program 1 times [2025-02-07 16:50:50,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:50:50,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294976975] [2025-02-07 16:50:50,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:50:50,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:50:50,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 16:50:50,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 16:50:50,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:50:50,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:50:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 16:50:50,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:50:50,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294976975] [2025-02-07 16:50:50,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294976975] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:50:50,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596156388] [2025-02-07 16:50:50,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 16:50:50,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:50:50,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:50:50,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:50:50,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 16:50:50,739 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 16:50:50,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 16:50:50,759 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 16:50:50,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:50:50,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-07 16:50:50,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:50:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 16:50:50,794 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:50:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 16:50:50,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596156388] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:50:50,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:50:50,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-02-07 16:50:50,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223354651] [2025-02-07 16:50:50,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:50:50,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 16:50:50,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:50:50,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 16:50:50,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-02-07 16:50:50,826 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 16:50:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:50:50,884 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2025-02-07 16:50:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 16:50:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 8 [2025-02-07 16:50:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:50:50,885 INFO L225 Difference]: With dead ends: 39 [2025-02-07 16:50:50,886 INFO L226 Difference]: Without dead ends: 32 [2025-02-07 16:50:50,886 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-02-07 16:50:50,886 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 16:50:50,887 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 16:50:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-07 16:50:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2025-02-07 16:50:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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 16:50:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2025-02-07 16:50:50,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2025-02-07 16:50:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:50:50,893 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2025-02-07 16:50:50,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 16:50:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2025-02-07 16:50:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-07 16:50:50,894 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:50:50,894 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2025-02-07 16:50:50,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 16:50:51,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:50:51,095 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:50:51,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:50:51,095 INFO L85 PathProgramCache]: Analyzing trace with hash -282285347, now seen corresponding path program 2 times [2025-02-07 16:50:51,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:50:51,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416538071] [2025-02-07 16:50:51,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:50:51,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:50:51,111 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-07 16:50:51,128 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 16:50:51,128 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:50:51,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:50:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 16:50:51,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:50:51,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416538071] [2025-02-07 16:50:51,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416538071] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:50:51,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745939517] [2025-02-07 16:50:51,241 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 16:50:51,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:50:51,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:50:51,243 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:50:51,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 16:50:51,279 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-07 16:50:51,297 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 16:50:51,298 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 16:50:51,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:50:51,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 16:50:51,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:50:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 16:50:51,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:50:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 16:50:51,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745939517] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:50:51,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:50:51,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-02-07 16:50:51,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732975947] [2025-02-07 16:50:51,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:50:51,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 16:50:51,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:50:51,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 16:50:51,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-02-07 16:50:51,393 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 16:50:51,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:50:51,472 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2025-02-07 16:50:51,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 16:50:51,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 14 [2025-02-07 16:50:51,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:50:51,473 INFO L225 Difference]: With dead ends: 84 [2025-02-07 16:50:51,474 INFO L226 Difference]: Without dead ends: 74 [2025-02-07 16:50:51,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-02-07 16:50:51,474 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 108 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 16:50:51,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 33 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 16:50:51,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-02-07 16:50:51,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 28. [2025-02-07 16:50:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 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 16:50:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2025-02-07 16:50:51,478 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2025-02-07 16:50:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:50:51,479 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2025-02-07 16:50:51,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 16:50:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2025-02-07 16:50:51,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 16:50:51,479 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:50:51,479 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2025-02-07 16:50:51,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 16:50:51,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:50:51,680 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:50:51,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:50:51,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1662398621, now seen corresponding path program 3 times [2025-02-07 16:50:51,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:50:51,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115828612] [2025-02-07 16:50:51,681 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:50:51,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:50:51,703 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 6 equivalence classes. [2025-02-07 16:50:51,799 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 16:50:51,799 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 16:50:51,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:50:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 16:50:52,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:50:52,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115828612] [2025-02-07 16:50:52,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115828612] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:50:52,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637067103] [2025-02-07 16:50:52,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 16:50:52,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:50:52,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:50:52,084 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:50:52,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 16:50:52,127 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 6 equivalence classes. [2025-02-07 16:50:52,302 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 16:50:52,303 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 16:50:52,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:50:52,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 16:50:52,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:50:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 16:50:52,353 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:50:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-07 16:50:52,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637067103] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:50:52,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:50:52,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-02-07 16:50:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532008670] [2025-02-07 16:50:52,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:50:52,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 16:50:52,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:50:52,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 16:50:52,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-07 16:50:52,578 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 16:50:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:50:52,830 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2025-02-07 16:50:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 16:50:52,831 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 26 [2025-02-07 16:50:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:50:52,832 INFO L225 Difference]: With dead ends: 174 [2025-02-07 16:50:52,833 INFO L226 Difference]: Without dead ends: 158 [2025-02-07 16:50:52,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-07 16:50:52,834 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 268 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 16:50:52,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 72 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 16:50:52,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2025-02-07 16:50:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 52. [2025-02-07 16:50:52,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 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 16:50:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2025-02-07 16:50:52,848 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2025-02-07 16:50:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:50:52,851 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2025-02-07 16:50:52,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 16:50:52,851 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2025-02-07 16:50:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 16:50:52,852 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:50:52,852 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2025-02-07 16:50:52,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-07 16:50:53,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:50:53,052 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:50:53,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:50:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1646371811, now seen corresponding path program 4 times [2025-02-07 16:50:53,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:50:53,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068732408] [2025-02-07 16:50:53,053 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:50:53,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:50:53,094 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-02-07 16:50:53,132 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 16:50:53,132 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 16:50:53,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:50:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-02-07 16:50:53,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:50:53,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068732408] [2025-02-07 16:50:53,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068732408] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:50:53,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955344925] [2025-02-07 16:50:53,772 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 16:50:53,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:50:53,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:50:53,774 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:50:53,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 16:50:53,847 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-02-07 16:50:53,896 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 16:50:53,896 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 16:50:53,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:50:53,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-07 16:50:53,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 16:50:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-02-07 16:50:53,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 16:50:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-02-07 16:50:54,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955344925] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 16:50:54,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 16:50:54,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2025-02-07 16:50:54,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202019769] [2025-02-07 16:50:54,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 16:50:54,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-07 16:50:54,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 16:50:54,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-07 16:50:54,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 16:50:54,620 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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 16:50:55,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 16:50:55,134 INFO L93 Difference]: Finished difference Result 354 states and 405 transitions. [2025-02-07 16:50:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-07 16:50:55,134 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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 50 [2025-02-07 16:50:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 16:50:55,136 INFO L225 Difference]: With dead ends: 354 [2025-02-07 16:50:55,136 INFO L226 Difference]: Without dead ends: 326 [2025-02-07 16:50:55,137 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 16:50:55,138 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 692 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 16:50:55,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 144 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 16:50:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2025-02-07 16:50:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2025-02-07 16:50:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 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 16:50:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2025-02-07 16:50:55,147 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2025-02-07 16:50:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 16:50:55,147 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2025-02-07 16:50:55,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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 16:50:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2025-02-07 16:50:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-02-07 16:50:55,149 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 16:50:55,149 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2025-02-07 16:50:55,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 16:50:55,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:50:55,350 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 16:50:55,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 16:50:55,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2138885347, now seen corresponding path program 5 times [2025-02-07 16:50:55,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 16:50:55,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180154180] [2025-02-07 16:50:55,350 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 16:50:55,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 16:50:55,381 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 98 statements into 24 equivalence classes. [2025-02-07 16:50:55,644 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 98 of 98 statements. [2025-02-07 16:50:55,645 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-02-07 16:50:55,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 16:50:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2025-02-07 16:50:57,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 16:50:57,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180154180] [2025-02-07 16:50:57,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180154180] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 16:50:57,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301285476] [2025-02-07 16:50:57,305 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 16:50:57,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 16:50:57,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 16:50:57,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 16:50:57,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 16:50:57,411 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 98 statements into 24 equivalence classes.