./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_max.c --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/verifythis/tree_max.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 16:06:07,211 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 16:06:07,255 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 16:06:07,263 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 16:06:07,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 16:06:07,283 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 16:06:07,284 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 16:06:07,284 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 16:06:07,284 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 16:06:07,284 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 16:06:07,284 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 16:06:07,285 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 16:06:07,285 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 16:06:07,285 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 16:06:07,285 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 16:06:07,285 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 16:06:07,285 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 16:06:07,285 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 16:06:07,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 16:06:07,285 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 16:06:07,285 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 16:06:07,286 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 16:06:07,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 16:06:07,286 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 16:06:07,286 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 16:06:07,286 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 16:06:07,286 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 16:06:07,286 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 16:06:07,286 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 16:06:07,286 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 16:06:07,286 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 16:06:07,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 16:06:07,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:06:07,287 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 16:06:07,287 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 16:06:07,287 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 16:06:07,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 16:06:07,287 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 16:06:07,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 16:06:07,287 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 16:06:07,287 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 16:06:07,287 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 16:06:07,287 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 16:06:07,287 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 -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2025-02-05 16:06:07,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 16:06:07,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 16:06:07,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 16:06:07,524 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 16:06:07,525 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 16:06:07,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2025-02-05 16:06:08,702 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bfdc5295b/664febbe65a84b5a9bc25b0e0cfdf0c3/FLAG64354e718 [2025-02-05 16:06:08,985 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 16:06:08,985 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2025-02-05 16:06:09,001 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bfdc5295b/664febbe65a84b5a9bc25b0e0cfdf0c3/FLAG64354e718 [2025-02-05 16:06:09,296 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bfdc5295b/664febbe65a84b5a9bc25b0e0cfdf0c3 [2025-02-05 16:06:09,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 16:06:09,301 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 16:06:09,303 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 16:06:09,303 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 16:06:09,310 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 16:06:09,311 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,311 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58fc47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09, skipping insertion in model container [2025-02-05 16:06:09,311 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,330 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 16:06:09,465 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/verifythis/tree_max.c[544,557] [2025-02-05 16:06:09,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:06:09,487 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 16:06:09,495 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/verifythis/tree_max.c[544,557] [2025-02-05 16:06:09,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:06:09,514 INFO L204 MainTranslator]: Completed translation [2025-02-05 16:06:09,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09 WrapperNode [2025-02-05 16:06:09,515 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 16:06:09,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 16:06:09,516 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 16:06:09,516 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 16:06:09,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,528 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,542 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 39 [2025-02-05 16:06:09,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 16:06:09,543 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 16:06:09,543 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 16:06:09,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 16:06:09,548 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,550 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,567 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-02-05 16:06:09,569 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,569 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,575 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,578 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,578 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,579 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 16:06:09,584 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 16:06:09,584 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 16:06:09,584 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 16:06:09,585 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (1/1) ... [2025-02-05 16:06:09,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:06:09,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:09,608 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 16:06:09,612 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 16:06:09,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-02-05 16:06:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-02-05 16:06:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 16:06:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure max [2025-02-05 16:06:09,630 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2025-02-05 16:06:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2025-02-05 16:06:09,631 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2025-02-05 16:06:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 16:06:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 16:06:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure check [2025-02-05 16:06:09,631 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2025-02-05 16:06:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-02-05 16:06:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-02-05 16:06:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 16:06:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 16:06:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-05 16:06:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 16:06:09,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 16:06:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 16:06:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 16:06:09,685 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 16:06:09,686 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 16:06:09,747 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L38: havoc ~a~0, ~b~0, ~c~0; [2025-02-05 16:06:09,772 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L26: havoc ~n~0.base, ~n~0.offset; [2025-02-05 16:06:09,814 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2025-02-05 16:06:09,814 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 16:06:09,820 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 16:06:09,821 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 16:06:09,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:06:09 BoogieIcfgContainer [2025-02-05 16:06:09,821 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 16:06:09,823 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 16:06:09,823 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 16:06:09,826 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 16:06:09,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 04:06:09" (1/3) ... [2025-02-05 16:06:09,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192815e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:06:09, skipping insertion in model container [2025-02-05 16:06:09,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:06:09" (2/3) ... [2025-02-05 16:06:09,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192815e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:06:09, skipping insertion in model container [2025-02-05 16:06:09,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:06:09" (3/3) ... [2025-02-05 16:06:09,828 INFO L128 eAbstractionObserver]: Analyzing ICFG tree_max.c [2025-02-05 16:06:09,841 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 16:06:09,842 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG tree_max.c that has 4 procedures, 42 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 16:06:09,905 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 16:06:09,920 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;@51ed63da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 16:06:09,921 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 16:06:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-05 16:06:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-02-05 16:06:09,928 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:09,928 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:09,929 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:09,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:09,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2011023373, now seen corresponding path program 1 times [2025-02-05 16:06:09,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:09,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932579675] [2025-02-05 16:06:09,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:09,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:09,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-05 16:06:10,018 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-05 16:06:10,019 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:10,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:10,332 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 16:06:10,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:10,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932579675] [2025-02-05 16:06:10,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932579675] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:06:10,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:06:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-05 16:06:10,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919859548] [2025-02-05 16:06:10,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:06:10,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 16:06:10,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:10,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 16:06:10,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-05 16:06:10,356 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 16:06:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:10,436 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2025-02-05 16:06:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 16:06:10,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2025-02-05 16:06:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:10,443 INFO L225 Difference]: With dead ends: 70 [2025-02-05 16:06:10,443 INFO L226 Difference]: Without dead ends: 36 [2025-02-05 16:06:10,447 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-05 16:06:10,449 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:10,450 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 284 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 16:06:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-02-05 16:06:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2025-02-05 16:06:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 26 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2025-02-05 16:06:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2025-02-05 16:06:10,474 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 19 [2025-02-05 16:06:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:10,474 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2025-02-05 16:06:10,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 16:06:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2025-02-05 16:06:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-05 16:06:10,476 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:10,476 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:10,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 16:06:10,476 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:10,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash 962335769, now seen corresponding path program 1 times [2025-02-05 16:06:10,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:10,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12365100] [2025-02-05 16:06:10,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:10,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:10,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 16:06:10,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 16:06:10,496 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:10,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 16:06:10,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:10,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12365100] [2025-02-05 16:06:10,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12365100] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:06:10,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:06:10,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-05 16:06:10,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77352460] [2025-02-05 16:06:10,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:06:10,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:06:10,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:10,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:06:10,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-02-05 16:06:10,666 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-05 16:06:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:10,731 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2025-02-05 16:06:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 16:06:10,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2025-02-05 16:06:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:10,733 INFO L225 Difference]: With dead ends: 49 [2025-02-05 16:06:10,733 INFO L226 Difference]: Without dead ends: 38 [2025-02-05 16:06:10,733 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-02-05 16:06:10,734 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:10,734 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 243 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:06:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-05 16:06:10,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-02-05 16:06:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.25) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2025-02-05 16:06:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2025-02-05 16:06:10,739 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 31 [2025-02-05 16:06:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:10,739 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2025-02-05 16:06:10,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-05 16:06:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2025-02-05 16:06:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-05 16:06:10,740 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:10,740 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:10,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 16:06:10,740 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:10,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:10,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1054280889, now seen corresponding path program 1 times [2025-02-05 16:06:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:10,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449687217] [2025-02-05 16:06:10,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:10,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:10,751 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-05 16:06:10,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-05 16:06:10,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:10,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-05 16:06:11,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:11,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449687217] [2025-02-05 16:06:11,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449687217] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:11,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656693632] [2025-02-05 16:06:11,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:11,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:11,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:11,353 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 16:06:11,355 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 16:06:11,416 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-05 16:06:11,448 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-05 16:06:11,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:11,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:11,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-02-05 16:06:11,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:11,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-05 16:06:11,701 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 15 treesize of output 7 [2025-02-05 16:06:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-05 16:06:11,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 16:06:11,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656693632] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:06:11,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:06:11,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 23 [2025-02-05 16:06:11,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086614840] [2025-02-05 16:06:11,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:11,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 16:06:11,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:11,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 16:06:11,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2025-02-05 16:06:11,910 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 23 states, 20 states have (on average 2.1) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2025-02-05 16:06:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:12,263 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2025-02-05 16:06:12,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 16:06:12,263 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 44 [2025-02-05 16:06:12,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:12,264 INFO L225 Difference]: With dead ends: 47 [2025-02-05 16:06:12,264 INFO L226 Difference]: Without dead ends: 45 [2025-02-05 16:06:12,265 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2025-02-05 16:06:12,265 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:12,266 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 184 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 16:06:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-02-05 16:06:12,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2025-02-05 16:06:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2025-02-05 16:06:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2025-02-05 16:06:12,270 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 44 [2025-02-05 16:06:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:12,270 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2025-02-05 16:06:12,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2025-02-05 16:06:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2025-02-05 16:06:12,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 16:06:12,272 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:12,272 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:12,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 16:06:12,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:12,473 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:12,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:12,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1494717056, now seen corresponding path program 1 times [2025-02-05 16:06:12,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:12,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93350272] [2025-02-05 16:06:12,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:12,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:12,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-05 16:06:12,510 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 16:06:12,510 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:12,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-05 16:06:13,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:13,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93350272] [2025-02-05 16:06:13,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93350272] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:13,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085044433] [2025-02-05 16:06:13,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:13,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:13,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:13,072 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 16:06:13,075 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 16:06:13,119 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-05 16:06:13,147 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 16:06:13,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:13,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:13,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-02-05 16:06:13,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:13,196 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 13 treesize of output 9 [2025-02-05 16:06:13,199 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 13 treesize of output 9 [2025-02-05 16:06:13,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2025-02-05 16:06:13,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2025-02-05 16:06:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-05 16:06:13,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-05 16:06:13,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085044433] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:06:13,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:06:13,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 14] total 29 [2025-02-05 16:06:13,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710907818] [2025-02-05 16:06:13,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:13,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-05 16:06:13,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:13,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-05 16:06:13,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2025-02-05 16:06:13,959 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 29 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2025-02-05 16:06:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:15,017 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2025-02-05 16:06:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 16:06:15,018 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) Word has length 50 [2025-02-05 16:06:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:15,023 INFO L225 Difference]: With dead ends: 114 [2025-02-05 16:06:15,023 INFO L226 Difference]: Without dead ends: 100 [2025-02-05 16:06:15,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=2581, Unknown=0, NotChecked=0, Total=2862 [2025-02-05 16:06:15,025 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 170 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:15,025 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 272 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-02-05 16:06:15,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-02-05 16:06:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2025-02-05 16:06:15,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 63 states have internal predecessors, (74), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (35), 16 states have call predecessors, (35), 13 states have call successors, (35) [2025-02-05 16:06:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2025-02-05 16:06:15,049 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 50 [2025-02-05 16:06:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:15,050 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2025-02-05 16:06:15,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2025-02-05 16:06:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2025-02-05 16:06:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 16:06:15,051 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:15,052 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:15,062 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 16:06:15,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:15,252 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:15,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1406982561, now seen corresponding path program 1 times [2025-02-05 16:06:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:15,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912730669] [2025-02-05 16:06:15,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:15,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:15,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-05 16:06:15,284 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 16:06:15,284 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:15,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 16:06:15,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:15,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912730669] [2025-02-05 16:06:15,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912730669] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:15,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330616884] [2025-02-05 16:06:15,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:15,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:15,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:15,601 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 16:06:15,604 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 16:06:15,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-05 16:06:15,667 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 16:06:15,667 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:15,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:15,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-02-05 16:06:15,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:15,689 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 13 treesize of output 9 [2025-02-05 16:06:15,691 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 13 treesize of output 9 [2025-02-05 16:06:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 16:06:15,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 16:06:16,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330616884] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:06:16,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:06:16,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 20 [2025-02-05 16:06:16,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761304913] [2025-02-05 16:06:16,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:16,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 16:06:16,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:16,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 16:06:16,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2025-02-05 16:06:16,004 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2025-02-05 16:06:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:16,261 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2025-02-05 16:06:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 16:06:16,261 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) Word has length 50 [2025-02-05 16:06:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:16,262 INFO L225 Difference]: With dead ends: 150 [2025-02-05 16:06:16,262 INFO L226 Difference]: Without dead ends: 107 [2025-02-05 16:06:16,263 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2025-02-05 16:06:16,264 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:16,264 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 490 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 16:06:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-02-05 16:06:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2025-02-05 16:06:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 68 states have internal predecessors, (80), 17 states have call successors, (17), 8 states have call predecessors, (17), 11 states have return successors, (35), 18 states have call predecessors, (35), 12 states have call successors, (35) [2025-02-05 16:06:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 132 transitions. [2025-02-05 16:06:16,272 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 132 transitions. Word has length 50 [2025-02-05 16:06:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:16,273 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 132 transitions. [2025-02-05 16:06:16,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2025-02-05 16:06:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 132 transitions. [2025-02-05 16:06:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-02-05 16:06:16,274 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:16,274 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:16,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 16:06:16,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:16,479 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:16,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:16,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1738761835, now seen corresponding path program 2 times [2025-02-05 16:06:16,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:16,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862188442] [2025-02-05 16:06:16,480 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:06:16,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:16,489 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 62 statements into 2 equivalence classes. [2025-02-05 16:06:16,502 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-02-05 16:06:16,503 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:06:16,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-05 16:06:16,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:16,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862188442] [2025-02-05 16:06:16,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862188442] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:16,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433852910] [2025-02-05 16:06:16,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:06:16,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:16,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:16,851 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 16:06:16,853 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 16:06:16,907 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 62 statements into 2 equivalence classes. [2025-02-05 16:06:16,940 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-02-05 16:06:16,940 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:06:16,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:16,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-02-05 16:06:16,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:16,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 16:06:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-05 16:06:17,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-02-05 16:06:17,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433852910] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:06:17,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:06:17,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 30 [2025-02-05 16:06:17,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576490753] [2025-02-05 16:06:17,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:17,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-05 16:06:17,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:17,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-05 16:06:17,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2025-02-05 16:06:17,433 INFO L87 Difference]: Start difference. First operand 95 states and 132 transitions. Second operand has 30 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 13 states have call successors, (20), 3 states have call predecessors, (20), 11 states have return successors, (19), 15 states have call predecessors, (19), 12 states have call successors, (19) [2025-02-05 16:06:21,440 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 16:06:25,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-05 16:06:29,482 WARN L539 Checker$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 16:06:33,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-05 16:06:37,772 WARN L539 Checker$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 16:06:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:38,010 INFO L93 Difference]: Finished difference Result 153 states and 215 transitions. [2025-02-05 16:06:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-05 16:06:38,010 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 13 states have call successors, (20), 3 states have call predecessors, (20), 11 states have return successors, (19), 15 states have call predecessors, (19), 12 states have call successors, (19) Word has length 62 [2025-02-05 16:06:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:38,012 INFO L225 Difference]: With dead ends: 153 [2025-02-05 16:06:38,012 INFO L226 Difference]: Without dead ends: 132 [2025-02-05 16:06:38,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2025-02-05 16:06:38,013 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 42 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 14 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:38,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 990 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 651 Invalid, 5 Unknown, 0 Unchecked, 20.4s Time] [2025-02-05 16:06:38,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-02-05 16:06:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 106. [2025-02-05 16:06:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 76 states have internal predecessors, (91), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (42), 20 states have call predecessors, (42), 13 states have call successors, (42) [2025-02-05 16:06:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 151 transitions. [2025-02-05 16:06:38,036 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 151 transitions. Word has length 62 [2025-02-05 16:06:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:38,036 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 151 transitions. [2025-02-05 16:06:38,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 13 states have call successors, (20), 3 states have call predecessors, (20), 11 states have return successors, (19), 15 states have call predecessors, (19), 12 states have call successors, (19) [2025-02-05 16:06:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 151 transitions. [2025-02-05 16:06:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-02-05 16:06:38,040 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:38,040 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:38,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 16:06:38,241 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,SelfDestructingSolverStorable5 [2025-02-05 16:06:38,242 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:38,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1436131177, now seen corresponding path program 3 times [2025-02-05 16:06:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:38,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371519136] [2025-02-05 16:06:38,244 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:06:38,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:38,254 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 5 equivalence classes. [2025-02-05 16:06:38,294 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 75 of 75 statements. [2025-02-05 16:06:38,295 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 16:06:38,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 25 proven. 41 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-05 16:06:39,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:39,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371519136] [2025-02-05 16:06:39,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371519136] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:39,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854595262] [2025-02-05 16:06:39,852 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 16:06:39,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:39,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:39,858 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 16:06:39,865 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 16:06:39,919 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 75 statements into 5 equivalence classes. [2025-02-05 16:06:39,978 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 75 of 75 statements. [2025-02-05 16:06:39,978 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 16:06:39,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:39,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 113 conjuncts are in the unsatisfiable core [2025-02-05 16:06:39,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:39,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-02-05 16:06:40,144 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-05 16:06:40,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2025-02-05 16:06:40,194 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 11 treesize of output 7 [2025-02-05 16:06:40,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 16:06:40,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-02-05 16:06:41,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 16:06:41,608 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 37 treesize of output 29 [2025-02-05 16:06:41,615 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-02-05 16:06:41,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2025-02-05 16:06:41,770 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 9 [2025-02-05 16:06:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 19 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 16:06:41,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-02-05 16:06:43,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854595262] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:06:43,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:06:43,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 23] total 76 [2025-02-05 16:06:43,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316513966] [2025-02-05 16:06:43,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:43,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2025-02-05 16:06:43,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:43,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2025-02-05 16:06:43,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=5428, Unknown=0, NotChecked=0, Total=5700 [2025-02-05 16:06:43,182 INFO L87 Difference]: Start difference. First operand 106 states and 151 transitions. Second operand has 76 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 58 states have internal predecessors, (106), 23 states have call successors, (31), 9 states have call predecessors, (31), 20 states have return successors, (28), 23 states have call predecessors, (28), 18 states have call successors, (28) [2025-02-05 16:06:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:48,193 INFO L93 Difference]: Finished difference Result 310 states and 490 transitions. [2025-02-05 16:06:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-02-05 16:06:48,193 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 58 states have internal predecessors, (106), 23 states have call successors, (31), 9 states have call predecessors, (31), 20 states have return successors, (28), 23 states have call predecessors, (28), 18 states have call successors, (28) Word has length 75 [2025-02-05 16:06:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:48,196 INFO L225 Difference]: With dead ends: 310 [2025-02-05 16:06:48,196 INFO L226 Difference]: Without dead ends: 308 [2025-02-05 16:06:48,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5464 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1134, Invalid=18326, Unknown=0, NotChecked=0, Total=19460 [2025-02-05 16:06:48,204 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 149 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 5092 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 5218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 5092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:48,204 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 774 Invalid, 5218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 5092 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2025-02-05 16:06:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2025-02-05 16:06:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 213. [2025-02-05 16:06:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 150 states have (on average 1.2666666666666666) internal successors, (190), 157 states have internal predecessors, (190), 29 states have call successors, (29), 15 states have call predecessors, (29), 33 states have return successors, (133), 40 states have call predecessors, (133), 21 states have call successors, (133) [2025-02-05 16:06:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 352 transitions. [2025-02-05 16:06:48,239 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 352 transitions. Word has length 75 [2025-02-05 16:06:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:48,239 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 352 transitions. [2025-02-05 16:06:48,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 58 states have internal predecessors, (106), 23 states have call successors, (31), 9 states have call predecessors, (31), 20 states have return successors, (28), 23 states have call predecessors, (28), 18 states have call successors, (28) [2025-02-05 16:06:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 352 transitions. [2025-02-05 16:06:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-05 16:06:48,241 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:48,241 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:48,248 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 16:06:48,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:48,446 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:48,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:48,447 INFO L85 PathProgramCache]: Analyzing trace with hash -84939697, now seen corresponding path program 1 times [2025-02-05 16:06:48,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:48,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903104194] [2025-02-05 16:06:48,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:48,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:48,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-05 16:06:48,498 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 16:06:48,498 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:48,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-02-05 16:06:49,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:49,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903104194] [2025-02-05 16:06:49,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903104194] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:49,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592549330] [2025-02-05 16:06:49,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:49,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:49,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:49,856 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 16:06:49,858 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 16:06:49,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-05 16:06:49,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 16:06:49,956 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:49,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:49,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 97 conjuncts are in the unsatisfiable core [2025-02-05 16:06:49,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:49,993 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 13 treesize of output 9 [2025-02-05 16:06:49,997 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 19 treesize of output 1 [2025-02-05 16:06:50,969 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 25 treesize of output 13 [2025-02-05 16:06:51,096 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 9 [2025-02-05 16:06:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-02-05 16:06:51,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:51,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 16:06:51,895 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 35 treesize of output 38 [2025-02-05 16:06:52,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592549330] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:52,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:06:52,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 53 [2025-02-05 16:06:52,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279218919] [2025-02-05 16:06:52,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:52,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-02-05 16:06:52,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:52,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-02-05 16:06:52,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4207, Unknown=0, NotChecked=0, Total=4422 [2025-02-05 16:06:52,311 INFO L87 Difference]: Start difference. First operand 213 states and 352 transitions. Second operand has 53 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 38 states have internal predecessors, (72), 16 states have call successors, (19), 6 states have call predecessors, (19), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2025-02-05 16:06:54,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:54,552 INFO L93 Difference]: Finished difference Result 472 states and 886 transitions. [2025-02-05 16:06:54,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-02-05 16:06:54,553 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 38 states have internal predecessors, (72), 16 states have call successors, (19), 6 states have call predecessors, (19), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) Word has length 76 [2025-02-05 16:06:54,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:54,556 INFO L225 Difference]: With dead ends: 472 [2025-02-05 16:06:54,559 INFO L226 Difference]: Without dead ends: 316 [2025-02-05 16:06:54,562 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1990 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=453, Invalid=7919, Unknown=0, NotChecked=0, Total=8372 [2025-02-05 16:06:54,565 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:54,566 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 860 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-02-05 16:06:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2025-02-05 16:06:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 249. [2025-02-05 16:06:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 179 states have (on average 1.2569832402234637) internal successors, (225), 181 states have internal predecessors, (225), 31 states have call successors, (31), 15 states have call predecessors, (31), 38 states have return successors, (168), 52 states have call predecessors, (168), 23 states have call successors, (168) [2025-02-05 16:06:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 424 transitions. [2025-02-05 16:06:54,606 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 424 transitions. Word has length 76 [2025-02-05 16:06:54,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:54,606 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 424 transitions. [2025-02-05 16:06:54,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 38 states have internal predecessors, (72), 16 states have call successors, (19), 6 states have call predecessors, (19), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2025-02-05 16:06:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 424 transitions. [2025-02-05 16:06:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-05 16:06:54,612 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:54,612 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:54,619 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 16:06:54,812 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,SelfDestructingSolverStorable7 [2025-02-05 16:06:54,813 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:54,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:54,814 INFO L85 PathProgramCache]: Analyzing trace with hash -553158831, now seen corresponding path program 1 times [2025-02-05 16:06:54,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:54,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477984660] [2025-02-05 16:06:54,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:54,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:54,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-05 16:06:54,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 16:06:54,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:54,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2025-02-05 16:06:54,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:54,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477984660] [2025-02-05 16:06:54,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477984660] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:06:54,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:06:54,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-05 16:06:54,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213887178] [2025-02-05 16:06:54,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:06:54,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 16:06:54,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:54,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 16:06:54,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-02-05 16:06:54,893 INFO L87 Difference]: Start difference. First operand 249 states and 424 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 16:06:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:54,946 INFO L93 Difference]: Finished difference Result 449 states and 866 transitions. [2025-02-05 16:06:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 16:06:54,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 76 [2025-02-05 16:06:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:54,949 INFO L225 Difference]: With dead ends: 449 [2025-02-05 16:06:54,949 INFO L226 Difference]: Without dead ends: 257 [2025-02-05 16:06:54,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-02-05 16:06:54,952 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:54,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 220 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 16:06:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2025-02-05 16:06:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 249. [2025-02-05 16:06:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 179 states have (on average 1.2458100558659218) internal successors, (223), 181 states have internal predecessors, (223), 31 states have call successors, (31), 15 states have call predecessors, (31), 38 states have return successors, (168), 52 states have call predecessors, (168), 23 states have call successors, (168) [2025-02-05 16:06:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 422 transitions. [2025-02-05 16:06:54,977 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 422 transitions. Word has length 76 [2025-02-05 16:06:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:54,978 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 422 transitions. [2025-02-05 16:06:54,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 16:06:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 422 transitions. [2025-02-05 16:06:54,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-05 16:06:54,981 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:54,981 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:54,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-05 16:06:54,981 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:54,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:54,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2052864723, now seen corresponding path program 2 times [2025-02-05 16:06:54,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:54,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906225161] [2025-02-05 16:06:54,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:06:54,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:54,991 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-02-05 16:06:54,998 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 16:06:54,999 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:06:54,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-02-05 16:06:55,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:55,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906225161] [2025-02-05 16:06:55,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906225161] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:55,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066455661] [2025-02-05 16:06:55,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:06:55,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:55,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:55,121 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 16:06:55,122 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 16:06:55,189 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-02-05 16:06:55,222 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 16:06:55,223 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:06:55,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:55,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-05 16:06:55,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-02-05 16:06:55,350 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-02-05 16:06:55,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066455661] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:06:55,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 16:06:55,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 20 [2025-02-05 16:06:55,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696005536] [2025-02-05 16:06:55,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:55,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 16:06:55,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:55,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 16:06:55,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2025-02-05 16:06:55,633 INFO L87 Difference]: Start difference. First operand 249 states and 422 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2025-02-05 16:06:55,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:55,858 INFO L93 Difference]: Finished difference Result 481 states and 930 transitions. [2025-02-05 16:06:55,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-05 16:06:55,859 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 76 [2025-02-05 16:06:55,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:55,861 INFO L225 Difference]: With dead ends: 481 [2025-02-05 16:06:55,861 INFO L226 Difference]: Without dead ends: 289 [2025-02-05 16:06:55,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 133 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2025-02-05 16:06:55,863 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 13 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:55,863 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 509 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:06:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2025-02-05 16:06:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 275. [2025-02-05 16:06:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 198 states have (on average 1.2222222222222223) internal successors, (242), 201 states have internal predecessors, (242), 31 states have call successors, (31), 15 states have call predecessors, (31), 45 states have return successors, (201), 58 states have call predecessors, (201), 23 states have call successors, (201) [2025-02-05 16:06:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 474 transitions. [2025-02-05 16:06:55,887 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 474 transitions. Word has length 76 [2025-02-05 16:06:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:55,887 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 474 transitions. [2025-02-05 16:06:55,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2025-02-05 16:06:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 474 transitions. [2025-02-05 16:06:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-02-05 16:06:55,889 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:55,889 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:55,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 16:06:56,089 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 16:06:56,090 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:56,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1161172573, now seen corresponding path program 1 times [2025-02-05 16:06:56,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:56,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137038664] [2025-02-05 16:06:56,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:56,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:56,099 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-02-05 16:06:56,115 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-02-05 16:06:56,115 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:56,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-02-05 16:06:56,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:06:56,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137038664] [2025-02-05 16:06:56,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137038664] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:56,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112619119] [2025-02-05 16:06:56,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:56,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:56,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:06:56,788 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 16:06:56,790 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 16:06:56,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-02-05 16:06:56,892 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-02-05 16:06:56,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:56,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:06:56,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-02-05 16:06:56,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:06:56,945 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 19 treesize of output 1 [2025-02-05 16:06:56,946 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 13 treesize of output 9 [2025-02-05 16:06:57,525 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 23 treesize of output 11 [2025-02-05 16:06:57,540 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 15 treesize of output 7 [2025-02-05 16:06:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-02-05 16:06:57,579 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:06:58,063 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2025-02-05 16:06:58,063 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 25 treesize of output 25 [2025-02-05 16:06:58,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112619119] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:06:58,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:06:58,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 41 [2025-02-05 16:06:58,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777689188] [2025-02-05 16:06:58,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:06:58,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-05 16:06:58,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:06:58,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-05 16:06:58,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2690, Unknown=0, NotChecked=0, Total=2862 [2025-02-05 16:06:58,222 INFO L87 Difference]: Start difference. First operand 275 states and 474 transitions. Second operand has 41 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 30 states have internal predecessors, (67), 14 states have call successors, (18), 5 states have call predecessors, (18), 9 states have return successors, (17), 15 states have call predecessors, (17), 11 states have call successors, (17) [2025-02-05 16:06:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:06:59,282 INFO L93 Difference]: Finished difference Result 351 states and 590 transitions. [2025-02-05 16:06:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-05 16:06:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 30 states have internal predecessors, (67), 14 states have call successors, (18), 5 states have call predecessors, (18), 9 states have return successors, (17), 15 states have call predecessors, (17), 11 states have call successors, (17) Word has length 77 [2025-02-05 16:06:59,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:06:59,286 INFO L225 Difference]: With dead ends: 351 [2025-02-05 16:06:59,289 INFO L226 Difference]: Without dead ends: 349 [2025-02-05 16:06:59,290 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=283, Invalid=4139, Unknown=0, NotChecked=0, Total=4422 [2025-02-05 16:06:59,291 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 28 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-05 16:06:59,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 751 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-05 16:06:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2025-02-05 16:06:59,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 195. [2025-02-05 16:06:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 141 states have (on average 1.2056737588652482) internal successors, (170), 140 states have internal predecessors, (170), 26 states have call successors, (26), 14 states have call predecessors, (26), 27 states have return successors, (116), 40 states have call predecessors, (116), 18 states have call successors, (116) [2025-02-05 16:06:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 312 transitions. [2025-02-05 16:06:59,316 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 312 transitions. Word has length 77 [2025-02-05 16:06:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:06:59,316 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 312 transitions. [2025-02-05 16:06:59,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 30 states have internal predecessors, (67), 14 states have call successors, (18), 5 states have call predecessors, (18), 9 states have return successors, (17), 15 states have call predecessors, (17), 11 states have call successors, (17) [2025-02-05 16:06:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 312 transitions. [2025-02-05 16:06:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-02-05 16:06:59,318 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:06:59,318 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:06:59,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-05 16:06:59,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:06:59,519 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:06:59,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:06:59,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1853931045, now seen corresponding path program 1 times [2025-02-05 16:06:59,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:06:59,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657950909] [2025-02-05 16:06:59,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:06:59,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:06:59,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-02-05 16:06:59,541 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-02-05 16:06:59,541 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:06:59,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-02-05 16:07:00,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:07:00,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657950909] [2025-02-05 16:07:00,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657950909] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:00,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978914243] [2025-02-05 16:07:00,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:07:00,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:07:00,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:07:00,285 INFO L229 MonitoredProcess]: Starting monitored process 10 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 16:07:00,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-05 16:07:00,382 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-02-05 16:07:00,416 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-02-05 16:07:00,416 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:07:00,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:00,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 100 conjuncts are in the unsatisfiable core [2025-02-05 16:07:00,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:07:00,449 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 19 treesize of output 1 [2025-02-05 16:07:00,450 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 13 treesize of output 9 [2025-02-05 16:07:01,475 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 25 treesize of output 13 [2025-02-05 16:07:01,601 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 9 [2025-02-05 16:07:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-02-05 16:07:01,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:07:02,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 16:07:02,450 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 33 treesize of output 36 [2025-02-05 16:07:03,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978914243] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:03,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:07:03,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 55 [2025-02-05 16:07:03,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699367662] [2025-02-05 16:07:03,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:07:03,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-02-05 16:07:03,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:07:03,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-02-05 16:07:03,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4729, Unknown=0, NotChecked=0, Total=4970 [2025-02-05 16:07:03,016 INFO L87 Difference]: Start difference. First operand 195 states and 312 transitions. Second operand has 55 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 39 states have internal predecessors, (73), 16 states have call successors, (19), 6 states have call predecessors, (19), 11 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2025-02-05 16:07:05,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:07:05,246 INFO L93 Difference]: Finished difference Result 266 states and 424 transitions. [2025-02-05 16:07:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-02-05 16:07:05,246 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 39 states have internal predecessors, (73), 16 states have call successors, (19), 6 states have call predecessors, (19), 11 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) Word has length 77 [2025-02-05 16:07:05,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:07:05,252 INFO L225 Difference]: With dead ends: 266 [2025-02-05 16:07:05,252 INFO L226 Difference]: Without dead ends: 264 [2025-02-05 16:07:05,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2650 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=557, Invalid=10155, Unknown=0, NotChecked=0, Total=10712 [2025-02-05 16:07:05,255 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 59 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:07:05,255 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 967 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-05 16:07:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2025-02-05 16:07:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 186. [2025-02-05 16:07:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 134 states have (on average 1.2164179104477613) internal successors, (163), 133 states have internal predecessors, (163), 25 states have call successors, (25), 13 states have call predecessors, (25), 26 states have return successors, (111), 39 states have call predecessors, (111), 18 states have call successors, (111) [2025-02-05 16:07:05,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 299 transitions. [2025-02-05 16:07:05,279 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 299 transitions. Word has length 77 [2025-02-05 16:07:05,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:07:05,279 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 299 transitions. [2025-02-05 16:07:05,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 39 states have internal predecessors, (73), 16 states have call successors, (19), 6 states have call predecessors, (19), 11 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2025-02-05 16:07:05,280 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 299 transitions. [2025-02-05 16:07:05,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-05 16:07:05,281 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:07:05,281 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:07:05,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-05 16:07:05,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:07:05,485 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:07:05,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:07:05,486 INFO L85 PathProgramCache]: Analyzing trace with hash -574883806, now seen corresponding path program 1 times [2025-02-05 16:07:05,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:07:05,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617810001] [2025-02-05 16:07:05,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:07:05,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:07:05,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-02-05 16:07:05,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 16:07:05,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:07:05,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-02-05 16:07:06,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:07:06,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617810001] [2025-02-05 16:07:06,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617810001] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:06,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686608542] [2025-02-05 16:07:06,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:07:06,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:07:06,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:07:06,295 INFO L229 MonitoredProcess]: Starting monitored process 11 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 16:07:06,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-05 16:07:06,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-02-05 16:07:06,423 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 16:07:06,423 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:07:06,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:06,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-02-05 16:07:06,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:07:06,431 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 19 treesize of output 1 [2025-02-05 16:07:06,432 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 19 treesize of output 1 [2025-02-05 16:07:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-02-05 16:07:06,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:07:15,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686608542] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:15,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:07:15,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 37 [2025-02-05 16:07:15,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155764689] [2025-02-05 16:07:15,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:07:15,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-02-05 16:07:15,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:07:15,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-02-05 16:07:15,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1597, Unknown=2, NotChecked=0, Total=1722 [2025-02-05 16:07:15,297 INFO L87 Difference]: Start difference. First operand 186 states and 299 transitions. Second operand has 37 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 16 states have call successors, (20), 7 states have call predecessors, (20), 9 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) [2025-02-05 16:07:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:07:16,604 INFO L93 Difference]: Finished difference Result 311 states and 518 transitions. [2025-02-05 16:07:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-05 16:07:16,605 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 16 states have call successors, (20), 7 states have call predecessors, (20), 9 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) Word has length 81 [2025-02-05 16:07:16,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:07:16,607 INFO L225 Difference]: With dead ends: 311 [2025-02-05 16:07:16,607 INFO L226 Difference]: Without dead ends: 299 [2025-02-05 16:07:16,607 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=268, Invalid=3270, Unknown=2, NotChecked=0, Total=3540 [2025-02-05 16:07:16,608 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 71 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-05 16:07:16,608 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1149 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-05 16:07:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2025-02-05 16:07:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 262. [2025-02-05 16:07:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 193 states have (on average 1.2124352331606219) internal successors, (234), 192 states have internal predecessors, (234), 32 states have call successors, (32), 20 states have call predecessors, (32), 36 states have return successors, (173), 49 states have call predecessors, (173), 20 states have call successors, (173) [2025-02-05 16:07:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 439 transitions. [2025-02-05 16:07:16,638 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 439 transitions. Word has length 81 [2025-02-05 16:07:16,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:07:16,638 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 439 transitions. [2025-02-05 16:07:16,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 16 states have call successors, (20), 7 states have call predecessors, (20), 9 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) [2025-02-05 16:07:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 439 transitions. [2025-02-05 16:07:16,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-02-05 16:07:16,640 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:07:16,640 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:07:16,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-05 16:07:16,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-05 16:07:16,844 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:07:16,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:07:16,845 INFO L85 PathProgramCache]: Analyzing trace with hash -487149311, now seen corresponding path program 4 times [2025-02-05 16:07:16,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:07:16,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563126257] [2025-02-05 16:07:16,845 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 16:07:16,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:07:16,855 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-02-05 16:07:16,876 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 16:07:16,877 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 16:07:16,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-02-05 16:07:17,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:07:17,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563126257] [2025-02-05 16:07:17,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563126257] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:17,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997593108] [2025-02-05 16:07:17,767 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 16:07:17,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:07:17,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:07:17,769 INFO L229 MonitoredProcess]: Starting monitored process 12 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 16:07:17,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-05 16:07:17,881 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-02-05 16:07:17,930 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-02-05 16:07:17,930 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-05 16:07:17,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:17,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 105 conjuncts are in the unsatisfiable core [2025-02-05 16:07:17,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:07:18,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-05 16:07:18,002 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 11 treesize of output 7 [2025-02-05 16:07:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 16:07:18,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:07:19,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997593108] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:19,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:07:19,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 42 [2025-02-05 16:07:19,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817552460] [2025-02-05 16:07:19,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:07:19,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-02-05 16:07:19,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:07:19,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-02-05 16:07:19,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2486, Unknown=0, NotChecked=0, Total=2652 [2025-02-05 16:07:19,331 INFO L87 Difference]: Start difference. First operand 262 states and 439 transitions. Second operand has 42 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 32 states have internal predecessors, (79), 15 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (18), 16 states have call predecessors, (18), 11 states have call successors, (18) [2025-02-05 16:07:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:07:21,609 INFO L93 Difference]: Finished difference Result 654 states and 1255 transitions. [2025-02-05 16:07:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-02-05 16:07:21,610 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 32 states have internal predecessors, (79), 15 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (18), 16 states have call predecessors, (18), 11 states have call successors, (18) Word has length 81 [2025-02-05 16:07:21,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:07:21,613 INFO L225 Difference]: With dead ends: 654 [2025-02-05 16:07:21,613 INFO L226 Difference]: Without dead ends: 467 [2025-02-05 16:07:21,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=497, Invalid=6985, Unknown=0, NotChecked=0, Total=7482 [2025-02-05 16:07:21,614 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 115 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:07:21,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 452 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-02-05 16:07:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2025-02-05 16:07:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 384. [2025-02-05 16:07:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 286 states have (on average 1.2062937062937062) internal successors, (345), 279 states have internal predecessors, (345), 48 states have call successors, (48), 29 states have call predecessors, (48), 49 states have return successors, (337), 75 states have call predecessors, (337), 29 states have call successors, (337) [2025-02-05 16:07:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 730 transitions. [2025-02-05 16:07:21,665 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 730 transitions. Word has length 81 [2025-02-05 16:07:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:07:21,666 INFO L471 AbstractCegarLoop]: Abstraction has 384 states and 730 transitions. [2025-02-05 16:07:21,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 32 states have internal predecessors, (79), 15 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (18), 16 states have call predecessors, (18), 11 states have call successors, (18) [2025-02-05 16:07:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 730 transitions. [2025-02-05 16:07:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-02-05 16:07:21,670 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:07:21,670 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:07:21,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-05 16:07:21,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-02-05 16:07:21,871 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:07:21,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:07:21,871 INFO L85 PathProgramCache]: Analyzing trace with hash -732111670, now seen corresponding path program 2 times [2025-02-05 16:07:21,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:07:21,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823007396] [2025-02-05 16:07:21,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:07:21,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:07:21,880 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-02-05 16:07:21,887 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-02-05 16:07:21,887 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:07:21,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 16:07:22,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:07:22,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823007396] [2025-02-05 16:07:22,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823007396] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:22,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773058299] [2025-02-05 16:07:22,368 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:07:22,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:07:22,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:07:22,372 INFO L229 MonitoredProcess]: Starting monitored process 13 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 16:07:22,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-05 16:07:22,464 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-02-05 16:07:22,497 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-02-05 16:07:22,497 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:07:22,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:22,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-02-05 16:07:22,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:07:22,724 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 29 treesize of output 17 [2025-02-05 16:07:22,726 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 23 treesize of output 11 [2025-02-05 16:07:22,736 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 15 treesize of output 7 [2025-02-05 16:07:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-05 16:07:22,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:07:23,351 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2025-02-05 16:07:23,351 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 25 treesize of output 25 [2025-02-05 16:07:23,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773058299] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:23,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:07:23,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 32 [2025-02-05 16:07:23,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490914827] [2025-02-05 16:07:23,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:07:23,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-05 16:07:23,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:07:23,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-05 16:07:23,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1037, Unknown=0, NotChecked=0, Total=1122 [2025-02-05 16:07:23,446 INFO L87 Difference]: Start difference. First operand 384 states and 730 transitions. Second operand has 32 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 13 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2025-02-05 16:07:23,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:07:23,948 INFO L93 Difference]: Finished difference Result 435 states and 820 transitions. [2025-02-05 16:07:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-05 16:07:23,949 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 13 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 75 [2025-02-05 16:07:23,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:07:23,951 INFO L225 Difference]: With dead ends: 435 [2025-02-05 16:07:23,952 INFO L226 Difference]: Without dead ends: 433 [2025-02-05 16:07:23,952 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 88 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=1580, Unknown=0, NotChecked=0, Total=1722 [2025-02-05 16:07:23,952 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:07:23,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 572 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 16:07:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2025-02-05 16:07:24,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 423. [2025-02-05 16:07:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 315 states have (on average 1.1968253968253968) internal successors, (377), 310 states have internal predecessors, (377), 53 states have call successors, (53), 33 states have call predecessors, (53), 54 states have return successors, (377), 79 states have call predecessors, (377), 29 states have call successors, (377) [2025-02-05 16:07:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 807 transitions. [2025-02-05 16:07:24,012 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 807 transitions. Word has length 75 [2025-02-05 16:07:24,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:07:24,012 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 807 transitions. [2025-02-05 16:07:24,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 13 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2025-02-05 16:07:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 807 transitions. [2025-02-05 16:07:24,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-02-05 16:07:24,016 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:07:24,016 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:07:24,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-05 16:07:24,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:07:24,220 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:07:24,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:07:24,221 INFO L85 PathProgramCache]: Analyzing trace with hash -243923664, now seen corresponding path program 1 times [2025-02-05 16:07:24,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:07:24,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658836096] [2025-02-05 16:07:24,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:07:24,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:07:24,232 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-05 16:07:24,241 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 16:07:24,241 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:07:24,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-02-05 16:07:24,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:07:24,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658836096] [2025-02-05 16:07:24,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658836096] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:24,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674674221] [2025-02-05 16:07:24,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:07:24,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:07:24,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:07:24,998 INFO L229 MonitoredProcess]: Starting monitored process 14 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 16:07:24,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-05 16:07:25,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 76 statements into 1 equivalence classes. [2025-02-05 16:07:25,126 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 76 of 76 statements. [2025-02-05 16:07:25,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:07:25,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:25,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 103 conjuncts are in the unsatisfiable core [2025-02-05 16:07:25,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:07:25,157 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 19 treesize of output 1 [2025-02-05 16:07:25,158 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 13 treesize of output 9 [2025-02-05 16:07:25,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2025-02-05 16:07:25,211 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 19 treesize of output 1 [2025-02-05 16:07:26,242 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 25 treesize of output 13 [2025-02-05 16:07:26,376 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 9 [2025-02-05 16:07:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 16:07:26,411 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:07:27,347 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2025-02-05 16:07:27,347 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 47 treesize of output 30 [2025-02-05 16:07:27,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674674221] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:27,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:07:27,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 33] total 55 [2025-02-05 16:07:27,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451124074] [2025-02-05 16:07:27,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:07:27,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-02-05 16:07:27,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:07:27,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-02-05 16:07:27,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=4894, Unknown=0, NotChecked=0, Total=5112 [2025-02-05 16:07:27,630 INFO L87 Difference]: Start difference. First operand 423 states and 807 transitions. Second operand has 55 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 41 states have internal predecessors, (75), 17 states have call successors, (19), 7 states have call predecessors, (19), 12 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) [2025-02-05 16:07:32,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:07:32,020 INFO L93 Difference]: Finished difference Result 601 states and 1099 transitions. [2025-02-05 16:07:32,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2025-02-05 16:07:32,021 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 41 states have internal predecessors, (75), 17 states have call successors, (19), 7 states have call predecessors, (19), 12 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) Word has length 76 [2025-02-05 16:07:32,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:07:32,025 INFO L225 Difference]: With dead ends: 601 [2025-02-05 16:07:32,025 INFO L226 Difference]: Without dead ends: 599 [2025-02-05 16:07:32,026 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4457 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=907, Invalid=17183, Unknown=0, NotChecked=0, Total=18090 [2025-02-05 16:07:32,027 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 139 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 3307 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-02-05 16:07:32,027 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 543 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3307 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-02-05 16:07:32,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2025-02-05 16:07:32,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 455. [2025-02-05 16:07:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 344 states have (on average 1.2005813953488371) internal successors, (413), 339 states have internal predecessors, (413), 54 states have call successors, (54), 34 states have call predecessors, (54), 56 states have return successors, (403), 81 states have call predecessors, (403), 26 states have call successors, (403) [2025-02-05 16:07:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 870 transitions. [2025-02-05 16:07:32,094 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 870 transitions. Word has length 76 [2025-02-05 16:07:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:07:32,095 INFO L471 AbstractCegarLoop]: Abstraction has 455 states and 870 transitions. [2025-02-05 16:07:32,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 41 states have internal predecessors, (75), 17 states have call successors, (19), 7 states have call predecessors, (19), 12 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) [2025-02-05 16:07:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 870 transitions. [2025-02-05 16:07:32,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-02-05 16:07:32,098 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:07:32,098 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:07:32,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-05 16:07:32,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:07:32,299 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:07:32,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:07:32,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1973733958, now seen corresponding path program 1 times [2025-02-05 16:07:32,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:07:32,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470819625] [2025-02-05 16:07:32,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:07:32,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:07:32,308 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-02-05 16:07:32,315 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-02-05 16:07:32,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:07:32,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-05 16:07:32,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:07:32,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470819625] [2025-02-05 16:07:32,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470819625] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:32,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402477734] [2025-02-05 16:07:32,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:07:32,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:07:32,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:07:32,867 INFO L229 MonitoredProcess]: Starting monitored process 15 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 16:07:32,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-05 16:07:32,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 77 statements into 1 equivalence classes. [2025-02-05 16:07:33,043 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 77 of 77 statements. [2025-02-05 16:07:33,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:07:33,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:07:33,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 94 conjuncts are in the unsatisfiable core [2025-02-05 16:07:33,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:07:33,087 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 13 treesize of output 9 [2025-02-05 16:07:33,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2025-02-05 16:07:34,612 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 25 treesize of output 13 [2025-02-05 16:07:34,765 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 9 [2025-02-05 16:07:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-02-05 16:07:34,798 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:07:35,844 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2025-02-05 16:07:35,845 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 47 treesize of output 30 [2025-02-05 16:07:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402477734] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:07:36,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:07:36,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 36] total 56 [2025-02-05 16:07:36,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147197604] [2025-02-05 16:07:36,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:07:36,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-02-05 16:07:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:07:36,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-02-05 16:07:36,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=5456, Unknown=0, NotChecked=0, Total=5700 [2025-02-05 16:07:36,639 INFO L87 Difference]: Start difference. First operand 455 states and 870 transitions. Second operand has 56 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 42 states have internal predecessors, (73), 17 states have call successors, (19), 7 states have call predecessors, (19), 10 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) [2025-02-05 16:07:41,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:07:41,262 INFO L93 Difference]: Finished difference Result 630 states and 1138 transitions. [2025-02-05 16:07:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2025-02-05 16:07:41,263 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 42 states have internal predecessors, (73), 17 states have call successors, (19), 7 states have call predecessors, (19), 10 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) Word has length 77 [2025-02-05 16:07:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:07:41,268 INFO L225 Difference]: With dead ends: 630 [2025-02-05 16:07:41,269 INFO L226 Difference]: Without dead ends: 628 [2025-02-05 16:07:41,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5114 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1063, Invalid=19529, Unknown=0, NotChecked=0, Total=20592 [2025-02-05 16:07:41,270 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 130 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 3322 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 3391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-02-05 16:07:41,270 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 513 Invalid, 3391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3322 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-02-05 16:07:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2025-02-05 16:07:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 373. [2025-02-05 16:07:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 282 states have (on average 1.202127659574468) internal successors, (339), 273 states have internal predecessors, (339), 45 states have call successors, (45), 28 states have call predecessors, (45), 45 states have return successors, (309), 71 states have call predecessors, (309), 25 states have call successors, (309) [2025-02-05 16:07:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 693 transitions. [2025-02-05 16:07:41,353 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 693 transitions. Word has length 77 [2025-02-05 16:07:41,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:07:41,353 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 693 transitions. [2025-02-05 16:07:41,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 42 states have internal predecessors, (73), 17 states have call successors, (19), 7 states have call predecessors, (19), 10 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) [2025-02-05 16:07:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 693 transitions. [2025-02-05 16:07:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2025-02-05 16:07:41,356 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:07:41,356 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:07:41,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0