./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_running-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc 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_running-2.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 b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 09:58:49,877 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 09:58:49,942 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 09:58:49,945 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 09:58:49,945 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 09:58:49,965 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 09:58:49,966 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 09:58:49,966 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 09:58:49,966 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 09:58:49,966 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 09:58:49,966 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 09:58:49,966 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 09:58:49,966 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 09:58:49,966 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 09:58:49,967 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 09:58:49,967 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 09:58:49,967 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 09:58:49,969 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 09:58:49,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 09:58:49,970 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 09:58:49,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 09:58:49,970 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 09:58:49,970 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 09:58:49,970 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 09:58:49,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 09:58:49,970 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 09:58:49,970 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 09:58:49,970 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 09:58:49,970 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 09:58:49,970 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 -> b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 [2025-02-05 09:58:50,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 09:58:50,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 09:58:50,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 09:58:50,194 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 09:58:50,194 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 09:58:50,195 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_running-2.i [2025-02-05 09:58:51,431 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d2a8bab63/9c4dea25325a4edaaf80b802c92922a2/FLAGa3adfbc01 [2025-02-05 09:58:51,676 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 09:58:51,676 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-2.i [2025-02-05 09:58:51,688 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d2a8bab63/9c4dea25325a4edaaf80b802c92922a2/FLAGa3adfbc01 [2025-02-05 09:58:51,712 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d2a8bab63/9c4dea25325a4edaaf80b802c92922a2 [2025-02-05 09:58:51,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 09:58:51,715 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 09:58:51,716 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 09:58:51,716 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 09:58:51,719 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 09:58:51,720 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,721 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4017ef47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51, skipping insertion in model container [2025-02-05 09:58:51,721 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,733 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 09:58:51,825 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_running-2.i[811,824] [2025-02-05 09:58:51,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 09:58:51,845 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 09:58:51,852 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_running-2.i[811,824] [2025-02-05 09:58:51,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 09:58:51,873 INFO L204 MainTranslator]: Completed translation [2025-02-05 09:58:51,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51 WrapperNode [2025-02-05 09:58:51,874 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 09:58:51,875 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 09:58:51,875 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 09:58:51,875 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 09:58:51,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,885 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,898 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2025-02-05 09:58:51,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 09:58:51,898 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 09:58:51,899 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 09:58:51,899 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 09:58:51,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,909 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,921 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2025-02-05 09:58:51,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,922 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,927 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,927 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,928 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,931 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,932 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 09:58:51,932 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 09:58:51,932 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 09:58:51,932 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 09:58:51,933 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (1/1) ... [2025-02-05 09:58:51,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 09:58:51,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:58:51,964 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) [2025-02-05 09:58:51,972 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 [2025-02-05 09:58:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 09:58:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 09:58:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 09:58:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 09:58:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 09:58:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 09:58:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 09:58:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 09:58:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 09:58:51,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 09:58:51,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 09:58:51,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 09:58:51,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 09:58:51,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 09:58:52,045 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 09:58:52,047 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 09:58:52,152 INFO L1309 $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; [2025-02-05 09:58:52,161 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-02-05 09:58:52,161 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 09:58:52,167 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 09:58:52,168 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 09:58:52,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 09:58:52 BoogieIcfgContainer [2025-02-05 09:58:52,168 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 09:58:52,170 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 09:58:52,170 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 09:58:52,173 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 09:58:52,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 09:58:51" (1/3) ... [2025-02-05 09:58:52,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aca7530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 09:58:52, skipping insertion in model container [2025-02-05 09:58:52,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 09:58:51" (2/3) ... [2025-02-05 09:58:52,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aca7530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 09:58:52, skipping insertion in model container [2025-02-05 09:58:52,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 09:58:52" (3/3) ... [2025-02-05 09:58:52,175 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2025-02-05 09:58:52,186 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 09:58:52,187 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_running-2.i that has 1 procedures, 20 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-05 09:58:52,219 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 09:58:52,231 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;@13baaaeb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 09:58:52,231 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 09:58:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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) [2025-02-05 09:58:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-05 09:58:52,237 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:58:52,237 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:58:52,237 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:58:52,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:58:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1619788428, now seen corresponding path program 1 times [2025-02-05 09:58:52,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:58:52,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906944825] [2025-02-05 09:58:52,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:58:52,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:58:52,295 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-05 09:58:52,306 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-05 09:58:52,307 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:58:52,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 09:58:52,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:58:52,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906944825] [2025-02-05 09:58:52,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906944825] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:58:52,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:58:52,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-05 09:58:52,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637229507] [2025-02-05 09:58:52,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:58:52,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-05 09:58:52,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:58:52,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-05 09:58:52,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 09:58:52,401 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2025-02-05 09:58:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:58:52,471 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2025-02-05 09:58:52,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 09:58:52,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2025-02-05 09:58:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:58:52,479 INFO L225 Difference]: With dead ends: 48 [2025-02-05 09:58:52,479 INFO L226 Difference]: Without dead ends: 27 [2025-02-05 09:58:52,484 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-05 09:58:52,485 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:58:52,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:58:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-05 09:58:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2025-02-05 09:58:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 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) [2025-02-05 09:58:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2025-02-05 09:58:52,509 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 7 [2025-02-05 09:58:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:58:52,510 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2025-02-05 09:58:52,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2025-02-05 09:58:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2025-02-05 09:58:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-05 09:58:52,511 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:58:52,511 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:58:52,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 09:58:52,512 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:58:52,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:58:52,513 INFO L85 PathProgramCache]: Analyzing trace with hash -537295212, now seen corresponding path program 1 times [2025-02-05 09:58:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:58:52,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041339317] [2025-02-05 09:58:52,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:58:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:58:52,535 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-05 09:58:52,543 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 09:58:52,543 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:58:52,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 09:58:52,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:58:52,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041339317] [2025-02-05 09:58:52,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041339317] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:58:52,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782895459] [2025-02-05 09:58:52,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:58:52,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:58:52,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:58:52,628 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) [2025-02-05 09:58:52,633 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 [2025-02-05 09:58:52,671 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-05 09:58:52,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-05 09:58:52,698 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:58:52,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:52,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-05 09:58:52,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:58:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 09:58:52,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:58:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 09:58:52,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782895459] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:58:52,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:58:52,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-05 09:58:52,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745199443] [2025-02-05 09:58:52,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:58:52,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 09:58:52,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:58:52,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 09:58:52,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 09:58:52,748 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2025-02-05 09:58:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:58:52,823 INFO L93 Difference]: Finished difference Result 67 states and 104 transitions. [2025-02-05 09:58:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 09:58:52,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 18 [2025-02-05 09:58:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:58:52,824 INFO L225 Difference]: With dead ends: 67 [2025-02-05 09:58:52,824 INFO L226 Difference]: Without dead ends: 52 [2025-02-05 09:58:52,825 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-05 09:58:52,825 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 78 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:58:52,825 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 43 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:58:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-02-05 09:58:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2025-02-05 09:58:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 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) [2025-02-05 09:58:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2025-02-05 09:58:52,830 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 18 [2025-02-05 09:58:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:58:52,830 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2025-02-05 09:58:52,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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) [2025-02-05 09:58:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2025-02-05 09:58:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 09:58:52,835 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:58:52,835 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:58:52,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-05 09:58:53,035 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 [2025-02-05 09:58:53,036 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:58:53,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:58:53,036 INFO L85 PathProgramCache]: Analyzing trace with hash 302029836, now seen corresponding path program 2 times [2025-02-05 09:58:53,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:58:53,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926394863] [2025-02-05 09:58:53,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:58:53,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:58:53,087 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-02-05 09:58:53,103 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 09:58:53,104 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:58:53,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-02-05 09:58:53,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:58:53,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926394863] [2025-02-05 09:58:53,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926394863] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:58:53,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:58:53,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 09:58:53,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260689868] [2025-02-05 09:58:53,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:58:53,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 09:58:53,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:58:53,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 09:58:53,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 09:58:53,343 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2025-02-05 09:58:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:58:53,384 INFO L93 Difference]: Finished difference Result 103 states and 154 transitions. [2025-02-05 09:58:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 09:58:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 51 [2025-02-05 09:58:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:58:53,385 INFO L225 Difference]: With dead ends: 103 [2025-02-05 09:58:53,386 INFO L226 Difference]: Without dead ends: 76 [2025-02-05 09:58:53,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-05 09:58:53,386 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:58:53,387 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 37 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:58:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-02-05 09:58:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2025-02-05 09:58:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 67 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:58:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2025-02-05 09:58:53,395 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 51 [2025-02-05 09:58:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:58:53,395 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2025-02-05 09:58:53,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2025-02-05 09:58:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2025-02-05 09:58:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 09:58:53,396 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:58:53,397 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:58:53,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-05 09:58:53,397 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:58:53,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:58:53,397 INFO L85 PathProgramCache]: Analyzing trace with hash -93400052, now seen corresponding path program 1 times [2025-02-05 09:58:53,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:58:53,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293546012] [2025-02-05 09:58:53,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:58:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:58:53,418 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 09:58:53,432 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 09:58:53,433 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:58:53,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-02-05 09:58:53,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:58:53,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293546012] [2025-02-05 09:58:53,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293546012] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 09:58:53,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 09:58:53,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 09:58:53,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721398087] [2025-02-05 09:58:53,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 09:58:53,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 09:58:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:58:53,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 09:58:53,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 09:58:53,522 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2025-02-05 09:58:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:58:53,538 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2025-02-05 09:58:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 09:58:53,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) Word has length 51 [2025-02-05 09:58:53,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:58:53,541 INFO L225 Difference]: With dead ends: 109 [2025-02-05 09:58:53,541 INFO L226 Difference]: Without dead ends: 106 [2025-02-05 09:58:53,542 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 09:58:53,542 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:58:53,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 61 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 09:58:53,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-02-05 09:58:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2025-02-05 09:58:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.42) internal successors, (142), 100 states have internal predecessors, (142), 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) [2025-02-05 09:58:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2025-02-05 09:58:53,555 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 51 [2025-02-05 09:58:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:58:53,556 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2025-02-05 09:58:53,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2025-02-05 09:58:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2025-02-05 09:58:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 09:58:53,557 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:58:53,557 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:58:53,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-05 09:58:53,558 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:58:53,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:58:53,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1836210387, now seen corresponding path program 1 times [2025-02-05 09:58:53,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:58:53,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958120973] [2025-02-05 09:58:53,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:58:53,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:58:53,572 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 09:58:53,606 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 09:58:53,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:58:53,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-02-05 09:58:53,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:58:53,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958120973] [2025-02-05 09:58:53,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958120973] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:58:53,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926437636] [2025-02-05 09:58:53,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:58:53,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:58:53,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:58:53,723 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) [2025-02-05 09:58:53,725 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 [2025-02-05 09:58:53,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 09:58:53,809 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 09:58:53,810 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:58:53,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:53,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 09:58:53,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:58:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-02-05 09:58:53,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:58:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-02-05 09:58:53,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926437636] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:58:53,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:58:53,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-02-05 09:58:53,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246071658] [2025-02-05 09:58:53,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:58:53,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-05 09:58:53,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:58:53,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-05 09:58:53,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-05 09:58:53,895 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2025-02-05 09:58:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:58:54,026 INFO L93 Difference]: Finished difference Result 356 states and 521 transitions. [2025-02-05 09:58:54,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 09:58:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) Word has length 51 [2025-02-05 09:58:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:58:54,028 INFO L225 Difference]: With dead ends: 356 [2025-02-05 09:58:54,028 INFO L226 Difference]: Without dead ends: 262 [2025-02-05 09:58:54,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-05 09:58:54,029 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 247 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:58:54,029 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 76 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:58:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2025-02-05 09:58:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 257. [2025-02-05 09:58:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.421875) internal successors, (364), 256 states have internal predecessors, (364), 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) [2025-02-05 09:58:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 364 transitions. [2025-02-05 09:58:54,046 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 364 transitions. Word has length 51 [2025-02-05 09:58:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:58:54,046 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 364 transitions. [2025-02-05 09:58:54,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2025-02-05 09:58:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 364 transitions. [2025-02-05 09:58:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-02-05 09:58:54,048 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:58:54,048 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:58:54,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 09:58:54,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:58:54,253 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:58:54,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:58:54,254 INFO L85 PathProgramCache]: Analyzing trace with hash 972566893, now seen corresponding path program 2 times [2025-02-05 09:58:54,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:58:54,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186157658] [2025-02-05 09:58:54,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:58:54,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:58:54,275 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-02-05 09:58:54,288 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-02-05 09:58:54,289 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:58:54,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2025-02-05 09:58:54,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:58:54,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186157658] [2025-02-05 09:58:54,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186157658] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:58:54,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945293168] [2025-02-05 09:58:54,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:58:54,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:58:54,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:58:54,611 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) [2025-02-05 09:58:54,612 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 [2025-02-05 09:58:54,690 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 117 statements into 2 equivalence classes. [2025-02-05 09:58:54,737 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-02-05 09:58:54,737 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:58:54,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:54,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 09:58:54,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:58:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2025-02-05 09:58:54,773 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:58:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2025-02-05 09:58:54,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945293168] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:58:54,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:58:54,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-02-05 09:58:54,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017950547] [2025-02-05 09:58:54,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:58:54,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 09:58:54,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:58:54,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 09:58:54,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-05 09:58:54,964 INFO L87 Difference]: Start difference. First operand 257 states and 364 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 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) [2025-02-05 09:58:55,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:58:55,305 INFO L93 Difference]: Finished difference Result 818 states and 1199 transitions. [2025-02-05 09:58:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-05 09:58:55,305 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 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 117 [2025-02-05 09:58:55,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:58:55,307 INFO L225 Difference]: With dead ends: 818 [2025-02-05 09:58:55,307 INFO L226 Difference]: Without dead ends: 574 [2025-02-05 09:58:55,308 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-05 09:58:55,309 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 858 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 09:58:55,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 157 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 09:58:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2025-02-05 09:58:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 569. [2025-02-05 09:58:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.4225352112676057) internal successors, (808), 568 states have internal predecessors, (808), 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) [2025-02-05 09:58:55,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 808 transitions. [2025-02-05 09:58:55,337 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 808 transitions. Word has length 117 [2025-02-05 09:58:55,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:58:55,337 INFO L471 AbstractCegarLoop]: Abstraction has 569 states and 808 transitions. [2025-02-05 09:58:55,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 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) [2025-02-05 09:58:55,337 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 808 transitions. [2025-02-05 09:58:55,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2025-02-05 09:58:55,347 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:58:55,347 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:58:55,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 09:58:55,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:58:55,551 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:58:55,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:58:55,552 INFO L85 PathProgramCache]: Analyzing trace with hash 809133549, now seen corresponding path program 3 times [2025-02-05 09:58:55,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:58:55,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675003613] [2025-02-05 09:58:55,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:58:55,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:58:55,588 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 249 statements into 23 equivalence classes. [2025-02-05 09:58:55,601 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 249 statements. [2025-02-05 09:58:55,601 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 09:58:55,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 64 proven. 169 refuted. 0 times theorem prover too weak. 2374 trivial. 0 not checked. [2025-02-05 09:58:55,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:58:55,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675003613] [2025-02-05 09:58:55,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675003613] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:58:55,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804136133] [2025-02-05 09:58:55,841 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:58:55,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:58:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:58:55,847 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) [2025-02-05 09:58:55,848 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 [2025-02-05 09:58:55,964 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 249 statements into 23 equivalence classes. [2025-02-05 09:58:55,980 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 249 statements. [2025-02-05 09:58:55,980 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 09:58:55,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:55,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-05 09:58:55,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:58:56,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-02-05 09:58:56,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 09:58:56,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 25 [2025-02-05 09:58:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 107 proven. 127 refuted. 0 times theorem prover too weak. 2373 trivial. 0 not checked. [2025-02-05 09:58:56,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:58:56,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-02-05 09:58:56,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2025-02-05 09:58:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 64 proven. 148 refuted. 0 times theorem prover too weak. 2395 trivial. 0 not checked. [2025-02-05 09:58:56,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804136133] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:58:56,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:58:56,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2025-02-05 09:58:56,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575058616] [2025-02-05 09:58:56,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:58:56,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 09:58:56,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:58:56,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 09:58:56,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2025-02-05 09:58:56,769 INFO L87 Difference]: Start difference. First operand 569 states and 808 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:58:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:58:56,999 INFO L93 Difference]: Finished difference Result 1324 states and 1801 transitions. [2025-02-05 09:58:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 09:58:57,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2025-02-05 09:58:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:58:57,007 INFO L225 Difference]: With dead ends: 1324 [2025-02-05 09:58:57,007 INFO L226 Difference]: Without dead ends: 1321 [2025-02-05 09:58:57,008 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 486 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2025-02-05 09:58:57,009 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 204 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 09:58:57,009 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 74 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 09:58:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2025-02-05 09:58:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1044. [2025-02-05 09:58:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 1.4372003835091083) internal successors, (1499), 1043 states have internal predecessors, (1499), 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) [2025-02-05 09:58:57,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1499 transitions. [2025-02-05 09:58:57,056 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1499 transitions. Word has length 249 [2025-02-05 09:58:57,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:58:57,057 INFO L471 AbstractCegarLoop]: Abstraction has 1044 states and 1499 transitions. [2025-02-05 09:58:57,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 09:58:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1499 transitions. [2025-02-05 09:58:57,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2025-02-05 09:58:57,059 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:58:57,059 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:58:57,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 09:58:57,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-05 09:58:57,264 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:58:57,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:58:57,264 INFO L85 PathProgramCache]: Analyzing trace with hash 714936749, now seen corresponding path program 1 times [2025-02-05 09:58:57,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:58:57,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545883211] [2025-02-05 09:58:57,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:58:57,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:58:57,297 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 249 statements into 1 equivalence classes. [2025-02-05 09:58:57,345 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 249 of 249 statements. [2025-02-05 09:58:57,345 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:58:57,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2025-02-05 09:58:58,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:58:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545883211] [2025-02-05 09:58:58,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545883211] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:58:58,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156861053] [2025-02-05 09:58:58,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 09:58:58,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:58:58,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:58:58,197 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) [2025-02-05 09:58:58,198 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 [2025-02-05 09:58:58,295 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 249 statements into 1 equivalence classes. [2025-02-05 09:58:58,370 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 249 of 249 statements. [2025-02-05 09:58:58,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 09:58:58,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:58:58,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-05 09:58:58,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:58:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2025-02-05 09:58:58,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:58:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2025-02-05 09:58:59,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156861053] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:58:59,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:58:59,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-02-05 09:58:59,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999283056] [2025-02-05 09:58:59,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:58:59,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-05 09:58:59,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:58:59,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-05 09:58:59,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-02-05 09:58:59,060 INFO L87 Difference]: Start difference. First operand 1044 states and 1499 transitions. Second operand has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 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) [2025-02-05 09:58:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:58:59,947 INFO L93 Difference]: Finished difference Result 3524 states and 5058 transitions. [2025-02-05 09:58:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-05 09:58:59,947 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 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 249 [2025-02-05 09:58:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:58:59,956 INFO L225 Difference]: With dead ends: 3524 [2025-02-05 09:58:59,956 INFO L226 Difference]: Without dead ends: 2505 [2025-02-05 09:58:59,958 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-02-05 09:58:59,959 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 1781 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1781 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 09:58:59,959 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1781 Valid, 295 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 09:58:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2025-02-05 09:59:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2196. [2025-02-05 09:59:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 1.4373576309794989) internal successors, (3155), 2195 states have internal predecessors, (3155), 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) [2025-02-05 09:59:00,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 3155 transitions. [2025-02-05 09:59:00,025 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 3155 transitions. Word has length 249 [2025-02-05 09:59:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:59:00,026 INFO L471 AbstractCegarLoop]: Abstraction has 2196 states and 3155 transitions. [2025-02-05 09:59:00,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 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) [2025-02-05 09:59:00,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 3155 transitions. [2025-02-05 09:59:00,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2025-02-05 09:59:00,033 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:59:00,034 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:59:00,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 09:59:00,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:59:00,238 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:59:00,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:59:00,238 INFO L85 PathProgramCache]: Analyzing trace with hash 328596141, now seen corresponding path program 2 times [2025-02-05 09:59:00,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:59:00,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436908556] [2025-02-05 09:59:00,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:59:00,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:59:00,290 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 513 statements into 2 equivalence classes. [2025-02-05 09:59:00,348 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 513 of 513 statements. [2025-02-05 09:59:00,348 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:59:00,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:59:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11523 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 10442 trivial. 0 not checked. [2025-02-05 09:59:02,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:59:02,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436908556] [2025-02-05 09:59:02,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436908556] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:59:02,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418414041] [2025-02-05 09:59:02,858 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 09:59:02,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:59:02,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:59:02,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:59:02,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 09:59:03,019 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 513 statements into 2 equivalence classes. [2025-02-05 09:59:03,164 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 513 of 513 statements. [2025-02-05 09:59:03,164 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 09:59:03,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:59:03,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 1669 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-02-05 09:59:03,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:59:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11523 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 10442 trivial. 0 not checked. [2025-02-05 09:59:03,260 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:59:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11523 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 10442 trivial. 0 not checked. [2025-02-05 09:59:05,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418414041] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:59:05,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:59:05,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2025-02-05 09:59:05,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099100963] [2025-02-05 09:59:05,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:59:05,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2025-02-05 09:59:05,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:59:05,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2025-02-05 09:59:05,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2025-02-05 09:59:05,359 INFO L87 Difference]: Start difference. First operand 2196 states and 3155 transitions. Second operand has 97 states, 97 states have (on average 1.1958762886597938) internal successors, (116), 97 states have internal predecessors, (116), 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) [2025-02-05 09:59:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:59:10,438 INFO L93 Difference]: Finished difference Result 7244 states and 10410 transitions. [2025-02-05 09:59:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-02-05 09:59:10,438 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.1958762886597938) internal successors, (116), 97 states have internal predecessors, (116), 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 513 [2025-02-05 09:59:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:59:10,453 INFO L225 Difference]: With dead ends: 7244 [2025-02-05 09:59:10,454 INFO L226 Difference]: Without dead ends: 5097 [2025-02-05 09:59:10,458 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 978 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2025-02-05 09:59:10,459 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 4212 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4212 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-05 09:59:10,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4212 Valid, 592 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-05 09:59:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2025-02-05 09:59:10,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 4500. [2025-02-05 09:59:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4500 states, 4499 states have (on average 1.4374305401200267) internal successors, (6467), 4499 states have internal predecessors, (6467), 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) [2025-02-05 09:59:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4500 states to 4500 states and 6467 transitions. [2025-02-05 09:59:10,545 INFO L78 Accepts]: Start accepts. Automaton has 4500 states and 6467 transitions. Word has length 513 [2025-02-05 09:59:10,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:59:10,545 INFO L471 AbstractCegarLoop]: Abstraction has 4500 states and 6467 transitions. [2025-02-05 09:59:10,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.1958762886597938) internal successors, (116), 97 states have internal predecessors, (116), 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) [2025-02-05 09:59:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4500 states and 6467 transitions. [2025-02-05 09:59:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1042 [2025-02-05 09:59:10,563 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:59:10,563 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:59:10,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 09:59:10,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-05 09:59:10,768 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:59:10,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:59:10,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1834601645, now seen corresponding path program 3 times [2025-02-05 09:59:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:59:10,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387853140] [2025-02-05 09:59:10,769 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:59:10,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:59:10,856 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1041 statements into 95 equivalence classes. [2025-02-05 09:59:10,874 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 1041 statements. [2025-02-05 09:59:10,875 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 09:59:10,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:59:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 48363 backedges. 280 proven. 745 refuted. 0 times theorem prover too weak. 47338 trivial. 0 not checked. [2025-02-05 09:59:11,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:59:11,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387853140] [2025-02-05 09:59:11,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387853140] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:59:11,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836069468] [2025-02-05 09:59:11,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 09:59:11,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:59:11,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:59:11,118 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:59:11,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 09:59:11,463 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1041 statements into 95 equivalence classes. [2025-02-05 09:59:11,482 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 1041 statements. [2025-02-05 09:59:11,482 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 09:59:11,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:59:11,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 09:59:11,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 09:59:12,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 09:59:12,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2025-02-05 09:59:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 48363 backedges. 653 proven. 373 refuted. 0 times theorem prover too weak. 47337 trivial. 0 not checked. [2025-02-05 09:59:12,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 09:59:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 48363 backedges. 280 proven. 652 refuted. 0 times theorem prover too weak. 47431 trivial. 0 not checked. [2025-02-05 09:59:13,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836069468] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 09:59:13,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 09:59:13,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2025-02-05 09:59:13,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531386546] [2025-02-05 09:59:13,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 09:59:13,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-05 09:59:13,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 09:59:13,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-05 09:59:13,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2025-02-05 09:59:13,301 INFO L87 Difference]: Start difference. First operand 4500 states and 6467 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 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) [2025-02-05 09:59:17,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-05 09:59:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 09:59:18,608 INFO L93 Difference]: Finished difference Result 5248 states and 7307 transitions. [2025-02-05 09:59:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 09:59:18,611 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 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 1041 [2025-02-05 09:59:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 09:59:18,637 INFO L225 Difference]: With dead ends: 5248 [2025-02-05 09:59:18,642 INFO L226 Difference]: Without dead ends: 5245 [2025-02-05 09:59:18,648 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2110 GetRequests, 2071 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2025-02-05 09:59:18,648 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 239 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2025-02-05 09:59:18,648 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 97 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2025-02-05 09:59:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2025-02-05 09:59:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 4489. [2025-02-05 09:59:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4488 states have (on average 1.4373885918003566) internal successors, (6451), 4488 states have internal predecessors, (6451), 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) [2025-02-05 09:59:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6451 transitions. [2025-02-05 09:59:18,819 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6451 transitions. Word has length 1041 [2025-02-05 09:59:18,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 09:59:18,820 INFO L471 AbstractCegarLoop]: Abstraction has 4489 states and 6451 transitions. [2025-02-05 09:59:18,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 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) [2025-02-05 09:59:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6451 transitions. [2025-02-05 09:59:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1042 [2025-02-05 09:59:18,843 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 09:59:18,843 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 09:59:18,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 09:59:19,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:59:19,048 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 09:59:19,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 09:59:19,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2130910325, now seen corresponding path program 4 times [2025-02-05 09:59:19,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 09:59:19,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870951165] [2025-02-05 09:59:19,049 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 09:59:19,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 09:59:19,146 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1041 statements into 2 equivalence classes. [2025-02-05 09:59:19,578 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 1041 of 1041 statements. [2025-02-05 09:59:19,579 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 09:59:19,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 09:59:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 48363 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 35156 trivial. 0 not checked. [2025-02-05 09:59:28,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 09:59:28,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870951165] [2025-02-05 09:59:28,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870951165] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 09:59:28,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538978602] [2025-02-05 09:59:28,077 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 09:59:28,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 09:59:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 09:59:28,079 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 09:59:28,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 09:59:28,416 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1041 statements into 2 equivalence classes.