./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array1_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array1_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 f9fbee177c3231db1a1e3277e649158ac81edd180968ad454e1d0751d0f1d4e9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 00:38:08,221 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 00:38:08,272 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 00:38:08,278 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 00:38:08,278 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 00:38:08,294 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 00:38:08,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 00:38:08,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 00:38:08,295 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 00:38:08,295 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 00:38:08,295 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 00:38:08,295 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 00:38:08,295 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 00:38:08,296 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 00:38:08,296 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 00:38:08,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:38:08,297 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 00:38:08,297 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 00:38:08,297 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 00:38:08,297 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 00:38:08,297 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 00:38:08,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 00:38:08,297 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 00:38:08,297 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 00:38:08,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 00:38:08,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 00:38:08,297 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/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 -> f9fbee177c3231db1a1e3277e649158ac81edd180968ad454e1d0751d0f1d4e9 [2025-03-08 00:38:08,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 00:38:08,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 00:38:08,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 00:38:08,528 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 00:38:08,528 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 00:38:08,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array1_pattern.c [2025-03-08 00:38:09,627 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea979568/93e46137ed7f475892045e7a139618d0/FLAG37c05936a [2025-03-08 00:38:09,843 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 00:38:09,844 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array1_pattern.c [2025-03-08 00:38:09,855 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea979568/93e46137ed7f475892045e7a139618d0/FLAG37c05936a [2025-03-08 00:38:10,196 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea979568/93e46137ed7f475892045e7a139618d0 [2025-03-08 00:38:10,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 00:38:10,199 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 00:38:10,199 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 00:38:10,199 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 00:38:10,202 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 00:38:10,203 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,203 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c31bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10, skipping insertion in model container [2025-03-08 00:38:10,203 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,213 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 00:38:10,314 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array1_pattern.c[1307,1320] [2025-03-08 00:38:10,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:38:10,337 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 00:38:10,345 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array1_pattern.c[1307,1320] [2025-03-08 00:38:10,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:38:10,365 INFO L204 MainTranslator]: Completed translation [2025-03-08 00:38:10,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10 WrapperNode [2025-03-08 00:38:10,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 00:38:10,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 00:38:10,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 00:38:10,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 00:38:10,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,378 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,391 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2025-03-08 00:38:10,391 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 00:38:10,392 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 00:38:10,392 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 00:38:10,392 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 00:38:10,398 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,399 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,410 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 3, 3]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2025-03-08 00:38:10,410 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,410 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,416 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,420 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,421 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,421 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,422 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 00:38:10,423 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 00:38:10,423 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 00:38:10,423 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 00:38:10,424 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (1/1) ... [2025-03-08 00:38:10,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:38:10,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:10,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 00:38:10,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 00:38:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 00:38:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 00:38:10,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 00:38:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 00:38:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 00:38:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 00:38:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 00:38:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 00:38:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 00:38:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-08 00:38:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 00:38:10,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 00:38:10,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 00:38:10,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 00:38:10,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-08 00:38:10,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 00:38:10,514 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 00:38:10,515 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 00:38:10,621 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L41: call ULTIMATE.dealloc(main_~#array1~0#1.base, main_~#array1~0#1.offset);havoc main_~#array1~0#1.base, main_~#array1~0#1.offset;call ULTIMATE.dealloc(main_~#array2~0#1.base, main_~#array2~0#1.offset);havoc main_~#array2~0#1.base, main_~#array2~0#1.offset; [2025-03-08 00:38:10,626 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-03-08 00:38:10,626 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 00:38:10,631 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 00:38:10,632 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 00:38:10,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:38:10 BoogieIcfgContainer [2025-03-08 00:38:10,632 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 00:38:10,633 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 00:38:10,633 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 00:38:10,636 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 00:38:10,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:38:10" (1/3) ... [2025-03-08 00:38:10,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43385ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:38:10, skipping insertion in model container [2025-03-08 00:38:10,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:38:10" (2/3) ... [2025-03-08 00:38:10,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43385ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:38:10, skipping insertion in model container [2025-03-08 00:38:10,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:38:10" (3/3) ... [2025-03-08 00:38:10,638 INFO L128 eAbstractionObserver]: Analyzing ICFG array1_pattern.c [2025-03-08 00:38:10,647 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 00:38:10,648 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array1_pattern.c that has 2 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 00:38:10,687 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 00:38:10,696 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;@286ff855, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 00:38:10,698 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 00:38:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:10,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-08 00:38:10,704 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:10,705 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:10,705 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:10,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:10,709 INFO L85 PathProgramCache]: Analyzing trace with hash -566993990, now seen corresponding path program 1 times [2025-03-08 00:38:10,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68597176] [2025-03-08 00:38:10,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:38:10,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:10,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 00:38:10,773 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 00:38:10,773 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:38:10,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:10,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:10,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68597176] [2025-03-08 00:38:10,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68597176] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:38:10,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:38:10,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 00:38:10,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652061853] [2025-03-08 00:38:10,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:38:10,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 00:38:10,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:10,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 00:38:10,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 00:38:10,824 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 00:38:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:10,832 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2025-03-08 00:38:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 00:38:10,834 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2025-03-08 00:38:10,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:10,837 INFO L225 Difference]: With dead ends: 41 [2025-03-08 00:38:10,837 INFO L226 Difference]: Without dead ends: 18 [2025-03-08 00:38:10,839 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 00:38:10,840 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:10,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:38:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-08 00:38:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-08 00:38:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2025-03-08 00:38:10,863 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 14 [2025-03-08 00:38:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:10,863 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2025-03-08 00:38:10,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 00:38:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2025-03-08 00:38:10,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-08 00:38:10,864 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:10,864 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:10,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 00:38:10,865 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:10,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1555530677, now seen corresponding path program 1 times [2025-03-08 00:38:10,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:10,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593909207] [2025-03-08 00:38:10,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:38:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:10,876 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 00:38:10,891 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 00:38:10,891 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:38:10,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:11,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:11,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593909207] [2025-03-08 00:38:11,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593909207] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:38:11,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:38:11,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 00:38:11,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272200360] [2025-03-08 00:38:11,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:38:11,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 00:38:11,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:11,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 00:38:11,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:38:11,076 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:11,091 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2025-03-08 00:38:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 00:38:11,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2025-03-08 00:38:11,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:11,092 INFO L225 Difference]: With dead ends: 22 [2025-03-08 00:38:11,092 INFO L226 Difference]: Without dead ends: 19 [2025-03-08 00:38:11,092 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 00:38:11,093 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:11,093 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 46 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:38:11,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-08 00:38:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-03-08 00:38:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-03-08 00:38:11,100 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 21 [2025-03-08 00:38:11,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:11,101 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-03-08 00:38:11,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-03-08 00:38:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-08 00:38:11,102 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:11,102 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:11,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 00:38:11,103 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:11,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:11,103 INFO L85 PathProgramCache]: Analyzing trace with hash 976842484, now seen corresponding path program 1 times [2025-03-08 00:38:11,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:11,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408954384] [2025-03-08 00:38:11,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:38:11,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:11,116 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-08 00:38:11,131 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 00:38:11,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:38:11,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:11,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:11,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408954384] [2025-03-08 00:38:11,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408954384] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:38:11,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:38:11,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 00:38:11,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041060366] [2025-03-08 00:38:11,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:38:11,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 00:38:11,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:11,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 00:38:11,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:38:11,258 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:11,307 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2025-03-08 00:38:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 00:38:11,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2025-03-08 00:38:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:11,308 INFO L225 Difference]: With dead ends: 34 [2025-03-08 00:38:11,308 INFO L226 Difference]: Without dead ends: 20 [2025-03-08 00:38:11,308 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:38:11,309 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:11,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 44 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:38:11,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-08 00:38:11,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-08 00:38:11,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2025-03-08 00:38:11,313 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 22 [2025-03-08 00:38:11,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:11,313 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2025-03-08 00:38:11,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:11,313 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2025-03-08 00:38:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 00:38:11,314 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:11,314 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:11,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 00:38:11,314 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:11,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1516340531, now seen corresponding path program 1 times [2025-03-08 00:38:11,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:11,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761972252] [2025-03-08 00:38:11,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:38:11,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:11,324 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 00:38:11,352 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 00:38:11,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:38:11,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:38:11,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117629074] [2025-03-08 00:38:11,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:38:11,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:11,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:11,360 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:11,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 00:38:11,407 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 00:38:11,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 00:38:11,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:38:11,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:11,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-08 00:38:11,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:11,553 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 [2025-03-08 00:38:11,560 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 [2025-03-08 00:38:11,877 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2025-03-08 00:38:11,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2025-03-08 00:38:11,894 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2025-03-08 00:38:11,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2025-03-08 00:38:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:12,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:12,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:12,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761972252] [2025-03-08 00:38:12,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:38:12,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117629074] [2025-03-08 00:38:12,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117629074] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:12,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:38:12,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-08 00:38:12,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950748409] [2025-03-08 00:38:12,698 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:12,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 00:38:12,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:12,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 00:38:12,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:38:12,700 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:13,068 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2025-03-08 00:38:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 00:38:13,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2025-03-08 00:38:13,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:13,070 INFO L225 Difference]: With dead ends: 46 [2025-03-08 00:38:13,070 INFO L226 Difference]: Without dead ends: 43 [2025-03-08 00:38:13,070 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:38:13,071 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:13,071 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 119 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:38:13,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-03-08 00:38:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2025-03-08 00:38:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 00:38:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2025-03-08 00:38:13,077 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 23 [2025-03-08 00:38:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:13,077 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2025-03-08 00:38:13,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2025-03-08 00:38:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 00:38:13,078 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:13,078 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:13,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 00:38:13,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:13,282 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:13,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:13,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1495602668, now seen corresponding path program 2 times [2025-03-08 00:38:13,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:13,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483549153] [2025-03-08 00:38:13,283 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:38:13,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:13,290 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-08 00:38:13,297 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 00:38:13,297 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:38:13,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:13,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:13,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483549153] [2025-03-08 00:38:13,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483549153] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:13,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628365647] [2025-03-08 00:38:13,369 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:38:13,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:13,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:13,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:13,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 00:38:13,404 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-08 00:38:13,417 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 00:38:13,417 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:38:13,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:13,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 00:38:13,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:13,474 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:13,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628365647] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:38:13,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:38:13,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-08 00:38:13,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125753239] [2025-03-08 00:38:13,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:13,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 00:38:13,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:13,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 00:38:13,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:38:13,520 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:13,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:13,629 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2025-03-08 00:38:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 00:38:13,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2025-03-08 00:38:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:13,631 INFO L225 Difference]: With dead ends: 40 [2025-03-08 00:38:13,631 INFO L226 Difference]: Without dead ends: 37 [2025-03-08 00:38:13,631 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-03-08 00:38:13,631 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:13,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 110 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:38:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-08 00:38:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2025-03-08 00:38:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2025-03-08 00:38:13,640 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 24 [2025-03-08 00:38:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:13,640 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2025-03-08 00:38:13,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2025-03-08 00:38:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 00:38:13,641 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:13,641 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:13,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 00:38:13,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:13,842 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:13,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:13,843 INFO L85 PathProgramCache]: Analyzing trace with hash 238115548, now seen corresponding path program 3 times [2025-03-08 00:38:13,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:13,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248294012] [2025-03-08 00:38:13,843 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:38:13,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:13,850 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-03-08 00:38:13,872 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 00:38:13,872 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 00:38:13,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:13,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:13,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248294012] [2025-03-08 00:38:13,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248294012] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:13,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141941602] [2025-03-08 00:38:13,941 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:38:13,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:13,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:13,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:13,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 00:38:13,973 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-03-08 00:38:13,995 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 00:38:13,995 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 00:38:13,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:13,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 00:38:13,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:14,036 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:14,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141941602] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:38:14,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:38:14,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-08 00:38:14,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363348189] [2025-03-08 00:38:14,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:14,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 00:38:14,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:14,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 00:38:14,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-08 00:38:14,073 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:14,113 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2025-03-08 00:38:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 00:38:14,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2025-03-08 00:38:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:14,115 INFO L225 Difference]: With dead ends: 41 [2025-03-08 00:38:14,115 INFO L226 Difference]: Without dead ends: 26 [2025-03-08 00:38:14,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-03-08 00:38:14,116 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:14,116 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:38:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-08 00:38:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-08 00:38:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2025-03-08 00:38:14,122 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2025-03-08 00:38:14,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:14,122 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2025-03-08 00:38:14,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2025-03-08 00:38:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 00:38:14,122 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:14,123 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:14,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 00:38:14,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:14,328 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:14,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:14,329 INFO L85 PathProgramCache]: Analyzing trace with hash 880989301, now seen corresponding path program 4 times [2025-03-08 00:38:14,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:14,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826985917] [2025-03-08 00:38:14,329 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:38:14,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:14,335 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-08 00:38:14,353 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 00:38:14,353 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:38:14,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:38:14,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497750862] [2025-03-08 00:38:14,354 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:38:14,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:14,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:14,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:14,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 00:38:14,397 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-08 00:38:14,415 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 00:38:14,416 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:38:14,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:14,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-08 00:38:14,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:14,458 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 [2025-03-08 00:38:14,464 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 [2025-03-08 00:38:14,509 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 19 treesize of output 18 [2025-03-08 00:38:14,522 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 19 treesize of output 18 [2025-03-08 00:38:14,871 INFO L349 Elim1Store]: treesize reduction 88, result has 29.6 percent of original size [2025-03-08 00:38:14,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 58 [2025-03-08 00:38:14,909 INFO L349 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2025-03-08 00:38:14,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 97 [2025-03-08 00:38:14,957 INFO L349 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2025-03-08 00:38:14,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 129 [2025-03-08 00:38:15,014 INFO L349 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2025-03-08 00:38:15,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 36 [2025-03-08 00:38:15,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:15,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 38 [2025-03-08 00:38:15,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:15,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2025-03-08 00:38:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:15,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:16,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:16,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826985917] [2025-03-08 00:38:16,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:38:16,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497750862] [2025-03-08 00:38:16,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497750862] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:16,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:38:16,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2025-03-08 00:38:16,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42282275] [2025-03-08 00:38:16,810 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:16,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 00:38:16,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:16,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 00:38:16,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2025-03-08 00:38:16,813 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:17,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:17,679 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2025-03-08 00:38:17,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 00:38:17,680 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2025-03-08 00:38:17,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:17,680 INFO L225 Difference]: With dead ends: 46 [2025-03-08 00:38:17,680 INFO L226 Difference]: Without dead ends: 43 [2025-03-08 00:38:17,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2025-03-08 00:38:17,681 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:17,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 109 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 00:38:17,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-03-08 00:38:17,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2025-03-08 00:38:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 00:38:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2025-03-08 00:38:17,691 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 25 [2025-03-08 00:38:17,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:17,692 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2025-03-08 00:38:17,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2025-03-08 00:38:17,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 00:38:17,692 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:17,692 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:17,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 00:38:17,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:17,897 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:17,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:17,897 INFO L85 PathProgramCache]: Analyzing trace with hash -664760836, now seen corresponding path program 5 times [2025-03-08 00:38:17,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:17,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851086083] [2025-03-08 00:38:17,897 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:38:17,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:17,907 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 4 equivalence classes. [2025-03-08 00:38:17,914 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 00:38:17,915 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:38:17,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:17,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:17,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851086083] [2025-03-08 00:38:17,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851086083] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:17,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092738992] [2025-03-08 00:38:17,993 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:38:17,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:17,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:17,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:17,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 00:38:18,032 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 4 equivalence classes. [2025-03-08 00:38:18,053 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 00:38:18,053 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 00:38:18,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:18,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:38:18,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:18,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:18,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092738992] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:38:18,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:38:18,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-03-08 00:38:18,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467865794] [2025-03-08 00:38:18,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:18,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 00:38:18,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:18,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 00:38:18,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-03-08 00:38:18,151 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:18,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:18,272 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2025-03-08 00:38:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 00:38:18,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2025-03-08 00:38:18,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:18,273 INFO L225 Difference]: With dead ends: 58 [2025-03-08 00:38:18,273 INFO L226 Difference]: Without dead ends: 55 [2025-03-08 00:38:18,273 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-03-08 00:38:18,274 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:18,274 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 124 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:38:18,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-03-08 00:38:18,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2025-03-08 00:38:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 00:38:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2025-03-08 00:38:18,281 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 26 [2025-03-08 00:38:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:18,281 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2025-03-08 00:38:18,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:18,281 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2025-03-08 00:38:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 00:38:18,281 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:18,281 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:18,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 00:38:18,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:18,482 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:18,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:18,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1540896308, now seen corresponding path program 6 times [2025-03-08 00:38:18,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:18,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043510046] [2025-03-08 00:38:18,482 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:38:18,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:18,488 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-03-08 00:38:18,499 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 00:38:18,499 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 00:38:18,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:18,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:18,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043510046] [2025-03-08 00:38:18,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043510046] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:18,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023402877] [2025-03-08 00:38:18,574 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:38:18,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:18,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:18,577 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:18,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 00:38:18,614 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-03-08 00:38:18,632 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 00:38:18,632 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 00:38:18,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:18,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 00:38:18,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:18,677 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:18,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023402877] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:38:18,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:38:18,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2025-03-08 00:38:18,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779804417] [2025-03-08 00:38:18,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:18,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 00:38:18,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:18,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 00:38:18,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-03-08 00:38:18,721 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:18,796 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2025-03-08 00:38:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 00:38:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2025-03-08 00:38:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:18,797 INFO L225 Difference]: With dead ends: 59 [2025-03-08 00:38:18,797 INFO L226 Difference]: Without dead ends: 51 [2025-03-08 00:38:18,797 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2025-03-08 00:38:18,798 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:18,798 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 104 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:38:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-08 00:38:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2025-03-08 00:38:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 00:38:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2025-03-08 00:38:18,805 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 26 [2025-03-08 00:38:18,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:18,806 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2025-03-08 00:38:18,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2025-03-08 00:38:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-08 00:38:18,806 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:18,806 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:18,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 00:38:19,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:19,011 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:19,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash 867282317, now seen corresponding path program 7 times [2025-03-08 00:38:19,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:19,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087015886] [2025-03-08 00:38:19,011 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:38:19,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:19,022 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 00:38:19,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 00:38:19,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:38:19,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:38:19,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75594211] [2025-03-08 00:38:19,065 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:38:19,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:19,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:19,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:19,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 00:38:19,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 00:38:19,137 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 00:38:19,137 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:38:19,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:19,138 WARN L254 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 72 conjuncts are in the unsatisfiable core [2025-03-08 00:38:19,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:19,204 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 [2025-03-08 00:38:19,216 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 [2025-03-08 00:38:19,249 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 19 treesize of output 18 [2025-03-08 00:38:19,254 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 19 treesize of output 18 [2025-03-08 00:38:19,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:19,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:38:19,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:19,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:38:19,762 INFO L349 Elim1Store]: treesize reduction 128, result has 31.6 percent of original size [2025-03-08 00:38:19,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 86 [2025-03-08 00:38:19,810 INFO L349 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2025-03-08 00:38:19,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 107 [2025-03-08 00:38:19,856 INFO L349 Elim1Store]: treesize reduction 99, result has 1.0 percent of original size [2025-03-08 00:38:19,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 137 [2025-03-08 00:38:19,915 INFO L349 Elim1Store]: treesize reduction 100, result has 29.6 percent of original size [2025-03-08 00:38:19,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 56 [2025-03-08 00:38:20,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:20,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 82 [2025-03-08 00:38:20,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:20,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 45 [2025-03-08 00:38:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:20,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:29,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:29,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087015886] [2025-03-08 00:38:29,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:38:29,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75594211] [2025-03-08 00:38:29,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75594211] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:29,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:38:29,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2025-03-08 00:38:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967536874] [2025-03-08 00:38:29,558 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:29,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 00:38:29,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:29,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 00:38:29,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=684, Unknown=2, NotChecked=0, Total=812 [2025-03-08 00:38:29,562 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 22 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:29,926 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2025-03-08 00:38:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 00:38:29,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2025-03-08 00:38:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:29,928 INFO L225 Difference]: With dead ends: 68 [2025-03-08 00:38:29,928 INFO L226 Difference]: Without dead ends: 65 [2025-03-08 00:38:29,928 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=158, Invalid=896, Unknown=2, NotChecked=0, Total=1056 [2025-03-08 00:38:29,930 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:29,930 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 176 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:38:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-08 00:38:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2025-03-08 00:38:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 00:38:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2025-03-08 00:38:29,942 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 27 [2025-03-08 00:38:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:29,942 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2025-03-08 00:38:29,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2025-03-08 00:38:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 00:38:29,943 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:29,943 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:29,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 00:38:30,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:30,143 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:30,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1460085076, now seen corresponding path program 8 times [2025-03-08 00:38:30,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:30,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219707505] [2025-03-08 00:38:30,144 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:38:30,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:30,150 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 00:38:30,158 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 00:38:30,158 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:38:30,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:30,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219707505] [2025-03-08 00:38:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219707505] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113750088] [2025-03-08 00:38:30,253 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:38:30,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:30,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:30,255 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:30,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 00:38:30,288 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 00:38:30,302 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 00:38:30,302 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:38:30,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:30,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 00:38:30,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:30,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:30,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113750088] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:38:30,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:38:30,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-08 00:38:30,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496869275] [2025-03-08 00:38:30,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:30,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 00:38:30,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:30,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 00:38:30,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-08 00:38:30,411 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:30,528 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2025-03-08 00:38:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 00:38:30,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2025-03-08 00:38:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:30,529 INFO L225 Difference]: With dead ends: 82 [2025-03-08 00:38:30,529 INFO L226 Difference]: Without dead ends: 79 [2025-03-08 00:38:30,529 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2025-03-08 00:38:30,530 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:30,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 152 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:38:30,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-08 00:38:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2025-03-08 00:38:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 00:38:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2025-03-08 00:38:30,549 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 28 [2025-03-08 00:38:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:30,550 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2025-03-08 00:38:30,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2025-03-08 00:38:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 00:38:30,550 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:30,550 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:30,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 00:38:30,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-08 00:38:30,751 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:30,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1115979804, now seen corresponding path program 9 times [2025-03-08 00:38:30,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:30,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815933483] [2025-03-08 00:38:30,752 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:38:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:30,758 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 4 equivalence classes. [2025-03-08 00:38:30,782 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 00:38:30,782 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 00:38:30,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:30,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:30,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815933483] [2025-03-08 00:38:30,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815933483] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:30,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371128345] [2025-03-08 00:38:30,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:38:30,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:30,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:30,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:30,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 00:38:30,934 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 4 equivalence classes. [2025-03-08 00:38:30,972 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 00:38:30,972 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 00:38:30,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:30,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 00:38:30,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:31,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:31,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371128345] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:38:31,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:38:31,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2025-03-08 00:38:31,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104412734] [2025-03-08 00:38:31,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:31,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 00:38:31,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:31,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 00:38:31,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2025-03-08 00:38:31,079 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:31,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:31,162 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2025-03-08 00:38:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 00:38:31,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2025-03-08 00:38:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:31,163 INFO L225 Difference]: With dead ends: 83 [2025-03-08 00:38:31,163 INFO L226 Difference]: Without dead ends: 74 [2025-03-08 00:38:31,163 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:38:31,164 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:31,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 108 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:38:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-03-08 00:38:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2025-03-08 00:38:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 00:38:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2025-03-08 00:38:31,182 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 28 [2025-03-08 00:38:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:31,182 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2025-03-08 00:38:31,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2025-03-08 00:38:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-08 00:38:31,184 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:31,184 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:31,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 00:38:31,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:31,384 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:31,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:31,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1981971147, now seen corresponding path program 10 times [2025-03-08 00:38:31,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:31,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902311950] [2025-03-08 00:38:31,385 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:38:31,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:31,389 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-08 00:38:31,405 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 00:38:31,405 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:38:31,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:38:31,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031194864] [2025-03-08 00:38:31,406 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:38:31,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:31,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:31,408 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:31,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 00:38:31,453 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-08 00:38:31,520 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 00:38:31,520 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:38:31,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:31,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 78 conjuncts are in the unsatisfiable core [2025-03-08 00:38:31,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:31,552 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 [2025-03-08 00:38:31,558 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 [2025-03-08 00:38:31,582 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 19 treesize of output 18 [2025-03-08 00:38:31,588 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 19 treesize of output 18 [2025-03-08 00:38:31,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:31,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:38:31,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:31,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:38:31,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:31,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:38:31,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:31,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:38:32,162 INFO L349 Elim1Store]: treesize reduction 168, result has 32.5 percent of original size [2025-03-08 00:38:32,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 114 [2025-03-08 00:38:32,193 INFO L349 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2025-03-08 00:38:32,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 117 [2025-03-08 00:38:32,236 INFO L349 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2025-03-08 00:38:32,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 145 [2025-03-08 00:38:32,305 INFO L349 Elim1Store]: treesize reduction 130, result has 31.2 percent of original size [2025-03-08 00:38:32,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 76 [2025-03-08 00:38:33,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:33,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 151 [2025-03-08 00:38:33,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:33,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 82 [2025-03-08 00:38:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:33,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:38,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:38,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902311950] [2025-03-08 00:38:38,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:38:38,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031194864] [2025-03-08 00:38:38,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031194864] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:38,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:38:38,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-08 00:38:38,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421044273] [2025-03-08 00:38:38,864 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:38,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 00:38:38,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:38,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 00:38:38,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=654, Unknown=1, NotChecked=0, Total=756 [2025-03-08 00:38:38,864 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:40,470 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2025-03-08 00:38:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 00:38:40,470 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2025-03-08 00:38:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:40,470 INFO L225 Difference]: With dead ends: 91 [2025-03-08 00:38:40,471 INFO L226 Difference]: Without dead ends: 88 [2025-03-08 00:38:40,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=153, Invalid=1036, Unknown=1, NotChecked=0, Total=1190 [2025-03-08 00:38:40,471 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:40,471 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 169 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 00:38:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-08 00:38:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2025-03-08 00:38:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 00:38:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2025-03-08 00:38:40,487 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 29 [2025-03-08 00:38:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:40,487 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2025-03-08 00:38:40,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2025-03-08 00:38:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 00:38:40,488 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:40,488 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:40,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 00:38:40,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 00:38:40,689 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:40,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:40,689 INFO L85 PathProgramCache]: Analyzing trace with hash 765797180, now seen corresponding path program 11 times [2025-03-08 00:38:40,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:40,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409566070] [2025-03-08 00:38:40,689 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:38:40,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:40,694 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 5 equivalence classes. [2025-03-08 00:38:40,706 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 00:38:40,706 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 00:38:40,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:40,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:40,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409566070] [2025-03-08 00:38:40,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409566070] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:40,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073902592] [2025-03-08 00:38:40,814 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:38:40,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:40,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:40,816 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:40,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 00:38:40,855 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 5 equivalence classes. [2025-03-08 00:38:40,906 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 00:38:40,906 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 00:38:40,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:40,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:38:40,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:40,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:41,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073902592] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:38:41,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:38:41,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2025-03-08 00:38:41,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794663994] [2025-03-08 00:38:41,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:41,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 00:38:41,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:41,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 00:38:41,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-08 00:38:41,061 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:41,206 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2025-03-08 00:38:41,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 00:38:41,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2025-03-08 00:38:41,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:41,207 INFO L225 Difference]: With dead ends: 107 [2025-03-08 00:38:41,207 INFO L226 Difference]: Without dead ends: 104 [2025-03-08 00:38:41,207 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2025-03-08 00:38:41,208 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:41,208 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 144 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:38:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-08 00:38:41,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2025-03-08 00:38:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 70 states have internal predecessors, (80), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 00:38:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2025-03-08 00:38:41,245 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 30 [2025-03-08 00:38:41,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:41,245 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2025-03-08 00:38:41,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:41,245 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2025-03-08 00:38:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 00:38:41,246 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:41,246 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:41,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 00:38:41,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 00:38:41,446 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:41,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1311531660, now seen corresponding path program 12 times [2025-03-08 00:38:41,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:41,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839673520] [2025-03-08 00:38:41,447 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:38:41,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:41,451 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-03-08 00:38:41,463 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 00:38:41,464 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-08 00:38:41,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:41,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:41,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839673520] [2025-03-08 00:38:41,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839673520] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:41,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112523315] [2025-03-08 00:38:41,582 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 00:38:41,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:41,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:41,584 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:41,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 00:38:41,628 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 4 equivalence classes. [2025-03-08 00:38:41,685 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 00:38:41,685 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-08 00:38:41,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:41,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:38:41,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:41,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:41,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112523315] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:38:41,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:38:41,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-03-08 00:38:41,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804730842] [2025-03-08 00:38:41,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:41,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 00:38:41,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:41,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 00:38:41,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2025-03-08 00:38:41,810 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:41,930 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2025-03-08 00:38:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 00:38:41,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2025-03-08 00:38:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:41,931 INFO L225 Difference]: With dead ends: 108 [2025-03-08 00:38:41,931 INFO L226 Difference]: Without dead ends: 98 [2025-03-08 00:38:41,931 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2025-03-08 00:38:41,931 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:41,931 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:38:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-08 00:38:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2025-03-08 00:38:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 00:38:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2025-03-08 00:38:41,952 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 30 [2025-03-08 00:38:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:41,953 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2025-03-08 00:38:41,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2025-03-08 00:38:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-08 00:38:41,955 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:41,955 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:41,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 00:38:42,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 00:38:42,155 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:42,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2030059443, now seen corresponding path program 13 times [2025-03-08 00:38:42,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:42,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179134532] [2025-03-08 00:38:42,156 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:38:42,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:42,161 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 00:38:42,192 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 00:38:42,196 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:38:42,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:38:42,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635626271] [2025-03-08 00:38:42,198 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 00:38:42,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:42,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:42,200 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:42,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 00:38:42,248 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 00:38:42,378 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 00:38:42,378 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:38:42,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:42,383 WARN L254 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-03-08 00:38:42,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:42,444 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 [2025-03-08 00:38:42,449 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 11 treesize of output 7 [2025-03-08 00:38:42,478 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 19 treesize of output 18 [2025-03-08 00:38:42,484 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 19 treesize of output 18 [2025-03-08 00:38:42,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:42,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:38:42,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:42,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-08 00:38:42,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:42,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:38:42,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:42,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-08 00:38:42,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:42,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:38:42,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:42,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2025-03-08 00:38:43,190 INFO L349 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2025-03-08 00:38:43,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 127 [2025-03-08 00:38:43,341 INFO L349 Elim1Store]: treesize reduction 208, result has 33.1 percent of original size [2025-03-08 00:38:43,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 142 [2025-03-08 00:38:43,399 INFO L349 Elim1Store]: treesize reduction 165, result has 0.6 percent of original size [2025-03-08 00:38:43,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 153 [2025-03-08 00:38:45,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 00:38:45,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 491 treesize of output 415 [2025-03-08 00:38:45,872 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 182 treesize of output 160 [2025-03-08 00:38:45,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:38:45,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:38:45,877 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-08 00:38:45,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:38:45,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:38:45,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:38:45,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:38:45,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:38:45,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:38:45,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:38:45,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:38:45,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 00:38:45,884 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-08 00:38:45,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2025-03-08 00:38:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:45,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:47,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:47,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179134532] [2025-03-08 00:38:47,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 00:38:47,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635626271] [2025-03-08 00:38:47,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635626271] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:47,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:38:47,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2025-03-08 00:38:47,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433683419] [2025-03-08 00:38:47,589 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:47,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 00:38:47,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:47,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 00:38:47,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 00:38:47,590 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 25 states, 25 states have (on average 1.08) internal successors, (27), 22 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:49,801 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2025-03-08 00:38:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 00:38:49,802 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.08) internal successors, (27), 22 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2025-03-08 00:38:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:49,802 INFO L225 Difference]: With dead ends: 113 [2025-03-08 00:38:49,802 INFO L226 Difference]: Without dead ends: 110 [2025-03-08 00:38:49,803 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2025-03-08 00:38:49,803 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:49,803 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 207 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 00:38:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-08 00:38:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2025-03-08 00:38:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-08 00:38:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2025-03-08 00:38:49,828 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 31 [2025-03-08 00:38:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:49,829 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2025-03-08 00:38:49,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.08) internal successors, (27), 22 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 00:38:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2025-03-08 00:38:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 00:38:49,829 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:49,829 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:49,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 00:38:50,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 00:38:50,035 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:50,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1465383060, now seen corresponding path program 14 times [2025-03-08 00:38:50,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:50,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880780431] [2025-03-08 00:38:50,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:38:50,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:50,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-08 00:38:50,049 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 00:38:50,049 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:38:50,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:50,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:50,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880780431] [2025-03-08 00:38:50,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880780431] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:50,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257447572] [2025-03-08 00:38:50,203 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:38:50,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:50,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:50,205 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:50,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 00:38:50,258 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-08 00:38:50,275 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 00:38:50,276 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:38:50,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:50,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:38:50,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:50,368 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257447572] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:38:50,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:38:50,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-03-08 00:38:50,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814539514] [2025-03-08 00:38:50,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:50,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 00:38:50,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:50,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 00:38:50,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:38:50,455 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:50,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:50,606 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2025-03-08 00:38:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 00:38:50,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2025-03-08 00:38:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:50,607 INFO L225 Difference]: With dead ends: 133 [2025-03-08 00:38:50,607 INFO L226 Difference]: Without dead ends: 130 [2025-03-08 00:38:50,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2025-03-08 00:38:50,608 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:50,608 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 132 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:38:50,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2025-03-08 00:38:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2025-03-08 00:38:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 86 states have internal predecessors, (98), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 00:38:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2025-03-08 00:38:50,633 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 32 [2025-03-08 00:38:50,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:50,633 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2025-03-08 00:38:50,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2025-03-08 00:38:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 00:38:50,634 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:50,634 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:50,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 00:38:50,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:50,834 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:50,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:50,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1492698460, now seen corresponding path program 15 times [2025-03-08 00:38:50,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:50,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681129284] [2025-03-08 00:38:50,835 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:38:50,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:50,840 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 5 equivalence classes. [2025-03-08 00:38:50,868 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 00:38:50,868 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 00:38:50,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:51,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:38:51,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681129284] [2025-03-08 00:38:51,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681129284] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:38:51,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269693654] [2025-03-08 00:38:51,005 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:38:51,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:51,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:51,007 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:51,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 00:38:51,056 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 5 equivalence classes. [2025-03-08 00:38:51,105 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 00:38:51,105 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 00:38:51,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:51,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 00:38:51,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:38:51,188 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:38:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:38:51,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269693654] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:38:51,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:38:51,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2025-03-08 00:38:51,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453168887] [2025-03-08 00:38:51,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:38:51,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 00:38:51,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:38:51,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 00:38:51,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-03-08 00:38:51,260 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:38:51,373 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2025-03-08 00:38:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 00:38:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2025-03-08 00:38:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:38:51,374 INFO L225 Difference]: With dead ends: 134 [2025-03-08 00:38:51,374 INFO L226 Difference]: Without dead ends: 123 [2025-03-08 00:38:51,375 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2025-03-08 00:38:51,375 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 00:38:51,375 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 00:38:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-03-08 00:38:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 108. [2025-03-08 00:38:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 00:38:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2025-03-08 00:38:51,405 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 32 [2025-03-08 00:38:51,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:38:51,405 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2025-03-08 00:38:51,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 00:38:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2025-03-08 00:38:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-08 00:38:51,405 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:38:51,405 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:38:51,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 00:38:51,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 00:38:51,606 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:38:51,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:38:51,606 INFO L85 PathProgramCache]: Analyzing trace with hash 59157302, now seen corresponding path program 1 times [2025-03-08 00:38:51,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:38:51,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191951082] [2025-03-08 00:38:51,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:38:51,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:38:51,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-08 00:38:51,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 00:38:51,634 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:38:51,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 00:38:51,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018110520] [2025-03-08 00:38:51,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:38:51,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:38:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:38:51,637 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 00:38:51,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 00:38:51,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-08 00:38:51,785 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 00:38:51,785 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:38:51,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:38:51,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 72 conjuncts are in the unsatisfiable core [2025-03-08 00:38:51,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:38:51,847 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 [2025-03-08 00:38:51,856 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 [2025-03-08 00:38:51,885 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 19 treesize of output 18 [2025-03-08 00:38:51,891 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 19 treesize of output 18 [2025-03-08 00:38:52,149 INFO L349 Elim1Store]: treesize reduction 88, result has 29.6 percent of original size [2025-03-08 00:38:52,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 58 [2025-03-08 00:38:52,178 INFO L349 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2025-03-08 00:38:52,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 97 [2025-03-08 00:38:52,203 INFO L349 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2025-03-08 00:38:52,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 129 [2025-03-08 00:38:53,615 INFO L349 Elim1Store]: treesize reduction 170, result has 30.0 percent of original size [2025-03-08 00:38:53,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 295 treesize of output 335 [2025-03-08 00:38:53,820 INFO L349 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2025-03-08 00:38:53,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 316 treesize of output 318