./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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/recursive-simple/fibo_10-2.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 a6546395432109233bf3e1991428a566548dd822bb23ca198622322bf4db5a8a --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:32:53,302 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:32:53,354 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:32:53,362 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:32:53,362 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:32:53,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:32:53,383 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:32:53,383 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:32:53,383 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:32:53,384 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:32:53,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:32:53,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:32:53,385 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:32:53,385 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:32:53,385 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:32:53,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:32:53,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:32:53,386 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:32:53,386 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:32:53,387 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:32:53,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:32:53,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:32:53,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:32:53,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:32:53,387 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:32:53,387 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:32:53,387 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:32:53,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:32:53,388 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:32:53,388 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:32:53,388 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:32:53,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:32:53,388 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 -> a6546395432109233bf3e1991428a566548dd822bb23ca198622322bf4db5a8a [2025-03-03 14:32:53,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:32:53,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:32:53,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:32:53,609 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:32:53,609 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:32:53,609 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-2.c [2025-03-03 14:32:54,699 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c043cb40/6c49a88257934c889681bbbb0c4ec128/FLAG24ba3e7df [2025-03-03 14:32:54,918 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:32:54,920 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c [2025-03-03 14:32:54,925 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c043cb40/6c49a88257934c889681bbbb0c4ec128/FLAG24ba3e7df [2025-03-03 14:32:54,939 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c043cb40/6c49a88257934c889681bbbb0c4ec128 [2025-03-03 14:32:54,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:32:54,944 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:32:54,945 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:32:54,946 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:32:54,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:32:54,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:32:54" (1/1) ... [2025-03-03 14:32:54,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f0fdbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:54, skipping insertion in model container [2025-03-03 14:32:54,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:32:54" (1/1) ... [2025-03-03 14:32:54,960 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:32:55,061 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/recursive-simple/fibo_10-2.c[743,756] [2025-03-03 14:32:55,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:32:55,072 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:32:55,080 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/recursive-simple/fibo_10-2.c[743,756] [2025-03-03 14:32:55,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:32:55,092 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:32:55,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55 WrapperNode [2025-03-03 14:32:55,092 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:32:55,094 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:32:55,094 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:32:55,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:32:55,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,103 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,114 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-03 14:32:55,115 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:32:55,116 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:32:55,116 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:32:55,116 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:32:55,121 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,122 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,131 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 14:32:55,131 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,132 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,133 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,133 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,134 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,134 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,135 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:32:55,136 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:32:55,136 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:32:55,136 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:32:55,137 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (1/1) ... [2025-03-03 14:32:55,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:32:55,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:55,160 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) [2025-03-03 14:32:55,165 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 [2025-03-03 14:32:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:32:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:32:55,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:32:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:32:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2025-03-03 14:32:55,178 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2025-03-03 14:32:55,219 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:32:55,220 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:32:55,288 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2025-03-03 14:32:55,292 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 14:32:55,293 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:32:55,298 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:32:55,299 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:32:55,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:32:55 BoogieIcfgContainer [2025-03-03 14:32:55,299 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:32:55,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:32:55,302 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:32:55,305 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:32:55,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:32:54" (1/3) ... [2025-03-03 14:32:55,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33decf4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:32:55, skipping insertion in model container [2025-03-03 14:32:55,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:32:55" (2/3) ... [2025-03-03 14:32:55,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33decf4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:32:55, skipping insertion in model container [2025-03-03 14:32:55,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:32:55" (3/3) ... [2025-03-03 14:32:55,307 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_10-2.c [2025-03-03 14:32:55,317 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:32:55,319 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_10-2.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 14:32:55,357 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:32:55,365 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;@5d88a16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:32:55,366 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:32:55,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 14:32:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:32:55,373 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:55,373 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:55,374 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:55,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash 402921910, now seen corresponding path program 1 times [2025-03-03 14:32:55,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:55,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607912001] [2025-03-03 14:32:55,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:55,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:55,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:32:55,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:32:55,447 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:55,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:32:55,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:55,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607912001] [2025-03-03 14:32:55,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607912001] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:32:55,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:32:55,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:32:55,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564684744] [2025-03-03 14:32:55,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:32:55,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:32:55,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:55,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:32:55,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:32:55,553 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2025-03-03 14:32:55,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:55,611 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2025-03-03 14:32:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:32:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2025-03-03 14:32:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:55,617 INFO L225 Difference]: With dead ends: 32 [2025-03-03 14:32:55,617 INFO L226 Difference]: Without dead ends: 20 [2025-03-03 14:32:55,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:32:55,622 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:55,622 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 51 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-03 14:32:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-03-03 14:32:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-03 14:32:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-03 14:32:55,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2025-03-03 14:32:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:55,647 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-03 14:32:55,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2025-03-03 14:32:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-03 14:32:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 14:32:55,648 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:55,648 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:55,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:32:55,648 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:55,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:55,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2143228819, now seen corresponding path program 1 times [2025-03-03 14:32:55,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:55,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179079059] [2025-03-03 14:32:55,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:55,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:55,658 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 14:32:55,663 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 14:32:55,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:55,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:32:55,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:55,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179079059] [2025-03-03 14:32:55,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179079059] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:32:55,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:32:55,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:32:55,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514352499] [2025-03-03 14:32:55,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:32:55,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:32:55,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:55,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:32:55,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:32:55,712 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2025-03-03 14:32:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:55,753 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2025-03-03 14:32:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:32:55,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 11 [2025-03-03 14:32:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:55,754 INFO L225 Difference]: With dead ends: 24 [2025-03-03 14:32:55,754 INFO L226 Difference]: Without dead ends: 20 [2025-03-03 14:32:55,754 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:32:55,755 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:55,755 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-03 14:32:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-03-03 14:32:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-03 14:32:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-03 14:32:55,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2025-03-03 14:32:55,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:55,759 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-03 14:32:55,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2025-03-03 14:32:55,760 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-03 14:32:55,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 14:32:55,761 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:55,761 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:55,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 14:32:55,762 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:55,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1857137997, now seen corresponding path program 1 times [2025-03-03 14:32:55,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:55,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265489851] [2025-03-03 14:32:55,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:55,770 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:32:55,779 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:32:55,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:55,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:32:55,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:55,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265489851] [2025-03-03 14:32:55,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265489851] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:55,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787192341] [2025-03-03 14:32:55,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:55,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:55,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:55,883 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) [2025-03-03 14:32:55,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 14:32:55,911 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:32:55,924 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:32:55,924 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:55,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:55,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:32:55,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:32:55,987 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 14:32:56,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787192341] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:56,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:56,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2025-03-03 14:32:56,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468430495] [2025-03-03 14:32:56,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:56,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 14:32:56,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:56,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 14:32:56,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:32:56,175 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:32:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:56,240 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2025-03-03 14:32:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:32:56,240 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-03-03 14:32:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:56,241 INFO L225 Difference]: With dead ends: 35 [2025-03-03 14:32:56,241 INFO L226 Difference]: Without dead ends: 20 [2025-03-03 14:32:56,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-03-03 14:32:56,243 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:56,243 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-03 14:32:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-03 14:32:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-03 14:32:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-03-03 14:32:56,246 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2025-03-03 14:32:56,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:56,246 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-03-03 14:32:56,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:32:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-03-03 14:32:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 14:32:56,250 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:56,250 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:56,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 14:32:56,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:56,450 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:56,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash -318077138, now seen corresponding path program 1 times [2025-03-03 14:32:56,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:56,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037525837] [2025-03-03 14:32:56,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:56,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:56,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:32:56,459 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:32:56,460 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:56,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:32:56,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:56,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037525837] [2025-03-03 14:32:56,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037525837] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:56,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213860207] [2025-03-03 14:32:56,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:32:56,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:56,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:56,525 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) [2025-03-03 14:32:56,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 14:32:56,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:32:56,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:32:56,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:32:56,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:56,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:32:56,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:32:56,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 14:32:56,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213860207] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:56,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:56,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-03-03 14:32:56,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537902154] [2025-03-03 14:32:56,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:56,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-03 14:32:56,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:56,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-03 14:32:56,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-03 14:32:56,717 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:32:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:56,763 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2025-03-03 14:32:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 14:32:56,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-03-03 14:32:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:56,765 INFO L225 Difference]: With dead ends: 29 [2025-03-03 14:32:56,765 INFO L226 Difference]: Without dead ends: 25 [2025-03-03 14:32:56,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:32:56,765 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:56,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:32:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-03 14:32:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-03 14:32:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 14:32:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2025-03-03 14:32:56,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2025-03-03 14:32:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:56,769 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2025-03-03 14:32:56,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:32:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2025-03-03 14:32:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 14:32:56,770 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:56,770 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:56,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 14:32:56,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-03 14:32:56,974 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:56,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:56,974 INFO L85 PathProgramCache]: Analyzing trace with hash -896080901, now seen corresponding path program 2 times [2025-03-03 14:32:56,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:56,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102899103] [2025-03-03 14:32:56,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:32:56,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:56,980 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-03 14:32:56,990 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:32:56,991 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:32:56,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 14:32:57,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:57,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102899103] [2025-03-03 14:32:57,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102899103] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:57,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699849894] [2025-03-03 14:32:57,084 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:32:57,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:57,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:57,086 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) [2025-03-03 14:32:57,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 14:32:57,106 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-03 14:32:57,117 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:32:57,117 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:32:57,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:57,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:32:57,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 14:32:57,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 14:32:57,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699849894] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:57,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:57,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 18 [2025-03-03 14:32:57,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752905916] [2025-03-03 14:32:57,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:57,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:32:57,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:57,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:32:57,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:32:57,473 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-03 14:32:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:57,627 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2025-03-03 14:32:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:32:57,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2025-03-03 14:32:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:57,628 INFO L225 Difference]: With dead ends: 60 [2025-03-03 14:32:57,628 INFO L226 Difference]: Without dead ends: 38 [2025-03-03 14:32:57,629 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:32:57,629 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:57,629 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:32:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-03 14:32:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-03-03 14:32:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-03 14:32:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2025-03-03 14:32:57,634 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2025-03-03 14:32:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:57,635 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2025-03-03 14:32:57,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-03 14:32:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2025-03-03 14:32:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-03 14:32:57,636 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:57,636 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:57,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 14:32:57,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:57,842 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:57,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:57,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1467785241, now seen corresponding path program 3 times [2025-03-03 14:32:57,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:57,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874537380] [2025-03-03 14:32:57,843 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:32:57,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:57,848 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-03-03 14:32:57,866 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-03-03 14:32:57,866 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:32:57,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-03-03 14:32:57,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:57,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874537380] [2025-03-03 14:32:57,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874537380] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:57,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582805800] [2025-03-03 14:32:57,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:32:57,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:57,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:57,971 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) [2025-03-03 14:32:57,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 14:32:57,996 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-03-03 14:32:58,012 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-03-03 14:32:58,012 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:32:58,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:58,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:32:58,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-03-03 14:32:58,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-03 14:32:58,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582805800] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:58,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:58,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 11 [2025-03-03 14:32:58,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864340057] [2025-03-03 14:32:58,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:58,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 14:32:58,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:58,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 14:32:58,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:32:58,343 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 14:32:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:58,423 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2025-03-03 14:32:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:32:58,423 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 93 [2025-03-03 14:32:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:58,424 INFO L225 Difference]: With dead ends: 72 [2025-03-03 14:32:58,424 INFO L226 Difference]: Without dead ends: 40 [2025-03-03 14:32:58,424 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-03-03 14:32:58,425 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:58,425 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 84 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:32:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-03 14:32:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-03-03 14:32:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.103448275862069) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-03 14:32:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-03-03 14:32:58,430 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 93 [2025-03-03 14:32:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:58,431 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-03-03 14:32:58,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 14:32:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-03-03 14:32:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-03 14:32:58,433 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:58,433 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:58,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 14:32:58,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:58,635 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:58,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:58,636 INFO L85 PathProgramCache]: Analyzing trace with hash 152396661, now seen corresponding path program 4 times [2025-03-03 14:32:58,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:58,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658544727] [2025-03-03 14:32:58,636 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:32:58,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:58,640 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-03-03 14:32:58,644 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 54 of 65 statements. [2025-03-03 14:32:58,644 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:32:58,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 14:32:58,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:58,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658544727] [2025-03-03 14:32:58,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658544727] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:58,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968219161] [2025-03-03 14:32:58,717 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:32:58,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:58,719 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) [2025-03-03 14:32:58,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 14:32:58,761 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-03-03 14:32:58,774 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 54 of 65 statements. [2025-03-03 14:32:58,774 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:32:58,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:58,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:32:58,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 14:32:58,812 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:32:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-03 14:32:59,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968219161] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:32:59,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:32:59,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2025-03-03 14:32:59,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315832405] [2025-03-03 14:32:59,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:32:59,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 14:32:59,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:32:59,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 14:32:59,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-03-03 14:32:59,187 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-03 14:32:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:32:59,260 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2025-03-03 14:32:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:32:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) Word has length 65 [2025-03-03 14:32:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:32:59,261 INFO L225 Difference]: With dead ends: 49 [2025-03-03 14:32:59,261 INFO L226 Difference]: Without dead ends: 45 [2025-03-03 14:32:59,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-03-03 14:32:59,262 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:32:59,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 58 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:32:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-03 14:32:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2025-03-03 14:32:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.09375) internal successors, (35), 30 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (16), 9 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-03 14:32:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2025-03-03 14:32:59,270 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 65 [2025-03-03 14:32:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:32:59,270 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2025-03-03 14:32:59,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-03 14:32:59,270 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2025-03-03 14:32:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-03-03 14:32:59,274 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:32:59,274 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:32:59,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 14:32:59,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:59,476 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:32:59,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:32:59,476 INFO L85 PathProgramCache]: Analyzing trace with hash -240813463, now seen corresponding path program 5 times [2025-03-03 14:32:59,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:32:59,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796900411] [2025-03-03 14:32:59,476 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:32:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:32:59,482 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 133 statements into 13 equivalence classes. [2025-03-03 14:32:59,495 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 99 of 133 statements. [2025-03-03 14:32:59,495 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-03 14:32:59,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 203 proven. 317 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2025-03-03 14:32:59,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:32:59,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796900411] [2025-03-03 14:32:59,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796900411] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:32:59,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519023107] [2025-03-03 14:32:59,668 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:32:59,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:32:59,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:32:59,670 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) [2025-03-03 14:32:59,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 14:32:59,700 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 133 statements into 13 equivalence classes. [2025-03-03 14:32:59,720 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 99 of 133 statements. [2025-03-03 14:32:59,720 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-03 14:32:59,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:32:59,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:32:59,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:32:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2025-03-03 14:32:59,794 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 189 proven. 354 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2025-03-03 14:33:00,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519023107] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:00,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:00,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 22 [2025-03-03 14:33:00,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7360414] [2025-03-03 14:33:00,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:00,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 14:33:00,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:00,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 14:33:00,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:33:00,644 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 13 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-03 14:33:00,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:00,843 INFO L93 Difference]: Finished difference Result 102 states and 151 transitions. [2025-03-03 14:33:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 14:33:00,844 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 13 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) Word has length 133 [2025-03-03 14:33:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:00,845 INFO L225 Difference]: With dead ends: 102 [2025-03-03 14:33:00,845 INFO L226 Difference]: Without dead ends: 63 [2025-03-03 14:33:00,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 254 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 14:33:00,846 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:00,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 120 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-03 14:33:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2025-03-03 14:33:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.146341463414634) internal successors, (47), 38 states have internal predecessors, (47), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2025-03-03 14:33:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2025-03-03 14:33:00,860 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 133 [2025-03-03 14:33:00,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:00,860 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2025-03-03 14:33:00,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 13 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-03 14:33:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2025-03-03 14:33:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-03-03 14:33:00,861 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:00,862 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:00,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:01,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:01,066 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:01,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1813016480, now seen corresponding path program 6 times [2025-03-03 14:33:01,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:01,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624328703] [2025-03-03 14:33:01,066 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:01,071 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 13 equivalence classes. [2025-03-03 14:33:01,087 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 92 of 106 statements. [2025-03-03 14:33:01,087 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 14:33:01,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 45 proven. 223 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2025-03-03 14:33:01,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:01,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624328703] [2025-03-03 14:33:01,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624328703] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:01,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008879300] [2025-03-03 14:33:01,210 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:01,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:01,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:01,212 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) [2025-03-03 14:33:01,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 14:33:01,251 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 13 equivalence classes. [2025-03-03 14:33:01,273 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 92 of 106 statements. [2025-03-03 14:33:01,273 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 14:33:01,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:01,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:33:01,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2025-03-03 14:33:01,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2025-03-03 14:33:01,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008879300] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:01,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:01,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2025-03-03 14:33:01,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212312252] [2025-03-03 14:33:01,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:01,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 14:33:01,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:01,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 14:33:01,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2025-03-03 14:33:01,952 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-03 14:33:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:02,024 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2025-03-03 14:33:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 14:33:02,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) Word has length 106 [2025-03-03 14:33:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:02,026 INFO L225 Difference]: With dead ends: 64 [2025-03-03 14:33:02,026 INFO L226 Difference]: Without dead ends: 60 [2025-03-03 14:33:02,026 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 204 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:33:02,026 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:02,027 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 72 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:33:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-03 14:33:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2025-03-03 14:33:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 40 states have internal predecessors, (49), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2025-03-03 14:33:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2025-03-03 14:33:02,035 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 106 [2025-03-03 14:33:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:02,036 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2025-03-03 14:33:02,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-03 14:33:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2025-03-03 14:33:02,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2025-03-03 14:33:02,037 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:02,037 INFO L218 NwaCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:02,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:02,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:02,240 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:02,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:02,240 INFO L85 PathProgramCache]: Analyzing trace with hash 779620497, now seen corresponding path program 7 times [2025-03-03 14:33:02,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:02,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186732099] [2025-03-03 14:33:02,240 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:02,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:02,248 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 201 statements into 1 equivalence classes. [2025-03-03 14:33:02,267 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 201 of 201 statements. [2025-03-03 14:33:02,267 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:02,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2025-03-03 14:33:02,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:02,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186732099] [2025-03-03 14:33:02,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186732099] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:02,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386452223] [2025-03-03 14:33:02,481 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:02,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:02,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:02,483 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) [2025-03-03 14:33:02,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 14:33:02,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 201 statements into 1 equivalence classes. [2025-03-03 14:33:02,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 201 of 201 statements. [2025-03-03 14:33:02,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:02,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:02,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:33:02,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2025-03-03 14:33:02,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 693 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2025-03-03 14:33:03,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386452223] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:03,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:03,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2025-03-03 14:33:03,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306850429] [2025-03-03 14:33:03,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:03,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:33:03,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:03,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:33:03,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:33:03,567 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2025-03-03 14:33:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:03,663 INFO L93 Difference]: Finished difference Result 69 states and 94 transitions. [2025-03-03 14:33:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 14:33:03,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 201 [2025-03-03 14:33:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:03,665 INFO L225 Difference]: With dead ends: 69 [2025-03-03 14:33:03,665 INFO L226 Difference]: Without dead ends: 65 [2025-03-03 14:33:03,668 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 394 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:33:03,668 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:03,668 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 79 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-03 14:33:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2025-03-03 14:33:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 43 states have internal predecessors, (52), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2025-03-03 14:33:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2025-03-03 14:33:03,677 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 201 [2025-03-03 14:33:03,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:03,677 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2025-03-03 14:33:03,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2025-03-03 14:33:03,677 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2025-03-03 14:33:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2025-03-03 14:33:03,679 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:03,682 INFO L218 NwaCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:03,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:03,886 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,SelfDestructingSolverStorable9 [2025-03-03 14:33:03,886 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:03,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash -713979081, now seen corresponding path program 8 times [2025-03-03 14:33:03,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:03,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574765330] [2025-03-03 14:33:03,887 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:03,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:03,894 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 351 statements into 2 equivalence classes. [2025-03-03 14:33:03,919 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 351 of 351 statements. [2025-03-03 14:33:03,920 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:03,920 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 228 proven. 1477 refuted. 0 times theorem prover too weak. 5415 trivial. 0 not checked. [2025-03-03 14:33:04,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:04,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574765330] [2025-03-03 14:33:04,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574765330] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:04,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968923097] [2025-03-03 14:33:04,199 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:04,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:04,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:04,200 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) [2025-03-03 14:33:04,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 14:33:04,264 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 351 statements into 2 equivalence classes. [2025-03-03 14:33:04,321 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 351 of 351 statements. [2025-03-03 14:33:04,321 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:04,321 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:04,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:33:04,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 228 proven. 1477 refuted. 0 times theorem prover too weak. 5415 trivial. 0 not checked. [2025-03-03 14:33:04,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 228 proven. 1534 refuted. 0 times theorem prover too weak. 5358 trivial. 0 not checked. [2025-03-03 14:33:05,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968923097] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:05,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:05,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2025-03-03 14:33:05,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721891696] [2025-03-03 14:33:05,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:05,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 14:33:05,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:05,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 14:33:05,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2025-03-03 14:33:05,858 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-03-03 14:33:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:05,970 INFO L93 Difference]: Finished difference Result 74 states and 108 transitions. [2025-03-03 14:33:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:33:05,971 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 351 [2025-03-03 14:33:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:05,972 INFO L225 Difference]: With dead ends: 74 [2025-03-03 14:33:05,972 INFO L226 Difference]: Without dead ends: 70 [2025-03-03 14:33:05,972 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 693 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:33:05,973 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:05,973 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 94 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-03 14:33:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2025-03-03 14:33:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 46 states have internal predecessors, (55), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (38), 15 states have call predecessors, (38), 11 states have call successors, (38) [2025-03-03 14:33:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 104 transitions. [2025-03-03 14:33:05,985 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 104 transitions. Word has length 351 [2025-03-03 14:33:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:05,985 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 104 transitions. [2025-03-03 14:33:05,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-03-03 14:33:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 104 transitions. [2025-03-03 14:33:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2025-03-03 14:33:05,992 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:05,992 INFO L218 NwaCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:05,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:06,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:06,196 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:06,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:06,196 INFO L85 PathProgramCache]: Analyzing trace with hash 281639384, now seen corresponding path program 9 times [2025-03-03 14:33:06,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:06,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647643457] [2025-03-03 14:33:06,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:06,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:06,209 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 528 statements into 70 equivalence classes. [2025-03-03 14:33:06,235 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) and asserted 204 of 528 statements. [2025-03-03 14:33:06,236 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2025-03-03 14:33:06,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1612 proven. 274 refuted. 0 times theorem prover too weak. 14521 trivial. 0 not checked. [2025-03-03 14:33:06,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:06,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647643457] [2025-03-03 14:33:06,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647643457] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:06,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478691698] [2025-03-03 14:33:06,400 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:06,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:06,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:06,402 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) [2025-03-03 14:33:06,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 14:33:06,489 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 528 statements into 70 equivalence classes. [2025-03-03 14:33:06,535 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) and asserted 204 of 528 statements. [2025-03-03 14:33:06,535 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2025-03-03 14:33:06,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:06,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:33:06,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1662 proven. 279 refuted. 0 times theorem prover too weak. 14466 trivial. 0 not checked. [2025-03-03 14:33:06,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1668 proven. 305 refuted. 0 times theorem prover too weak. 14434 trivial. 0 not checked. [2025-03-03 14:33:07,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478691698] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:07,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:07,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 17 [2025-03-03 14:33:07,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253104695] [2025-03-03 14:33:07,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:07,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:33:07,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:07,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:33:07,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:33:07,841 INFO L87 Difference]: Start difference. First operand 70 states and 104 transitions. Second operand has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2025-03-03 14:33:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:07,969 INFO L93 Difference]: Finished difference Result 185 states and 342 transitions. [2025-03-03 14:33:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:33:07,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) Word has length 528 [2025-03-03 14:33:07,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:07,971 INFO L225 Difference]: With dead ends: 185 [2025-03-03 14:33:07,971 INFO L226 Difference]: Without dead ends: 118 [2025-03-03 14:33:07,971 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 1047 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:33:07,972 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:07,972 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 68 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:07,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-03 14:33:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 89. [2025-03-03 14:33:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 58 states have internal predecessors, (73), 15 states have call successors, (15), 12 states have call predecessors, (15), 10 states have return successors, (57), 18 states have call predecessors, (57), 15 states have call successors, (57) [2025-03-03 14:33:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2025-03-03 14:33:07,980 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 528 [2025-03-03 14:33:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:07,980 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2025-03-03 14:33:07,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2025-03-03 14:33:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2025-03-03 14:33:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2025-03-03 14:33:07,983 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:07,983 INFO L218 NwaCegarLoop]: trace histogram [89, 89, 72, 44, 44, 44, 44, 44, 44, 44, 28, 17, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:07,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:08,183 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,SelfDestructingSolverStorable11 [2025-03-03 14:33:08,183 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:08,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:08,184 INFO L85 PathProgramCache]: Analyzing trace with hash -422591514, now seen corresponding path program 10 times [2025-03-03 14:33:08,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:08,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495206873] [2025-03-03 14:33:08,184 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:33:08,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:08,195 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 610 statements into 2 equivalence classes. [2025-03-03 14:33:08,227 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 519 of 610 statements. [2025-03-03 14:33:08,227 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:33:08,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22004 backedges. 416 proven. 3195 refuted. 0 times theorem prover too weak. 18393 trivial. 0 not checked. [2025-03-03 14:33:08,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:08,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495206873] [2025-03-03 14:33:08,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495206873] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:08,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106960759] [2025-03-03 14:33:08,590 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:33:08,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:08,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:08,592 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) [2025-03-03 14:33:08,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 14:33:08,679 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 610 statements into 2 equivalence classes. [2025-03-03 14:33:08,752 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 519 of 610 statements. [2025-03-03 14:33:08,752 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:33:08,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:08,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:33:08,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22004 backedges. 416 proven. 3195 refuted. 0 times theorem prover too weak. 18393 trivial. 0 not checked. [2025-03-03 14:33:08,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 22004 backedges. 416 proven. 3272 refuted. 0 times theorem prover too weak. 18316 trivial. 0 not checked. [2025-03-03 14:33:11,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106960759] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:11,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:11,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2025-03-03 14:33:11,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283607685] [2025-03-03 14:33:11,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:11,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 14:33:11,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:11,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 14:33:11,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:33:11,043 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2025-03-03 14:33:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:11,200 INFO L93 Difference]: Finished difference Result 105 states and 179 transitions. [2025-03-03 14:33:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:33:11,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) Word has length 610 [2025-03-03 14:33:11,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:11,203 INFO L225 Difference]: With dead ends: 105 [2025-03-03 14:33:11,203 INFO L226 Difference]: Without dead ends: 101 [2025-03-03 14:33:11,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1244 GetRequests, 1210 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:33:11,203 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:11,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 102 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-03 14:33:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2025-03-03 14:33:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 61 states have internal predecessors, (76), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (69), 20 states have call predecessors, (69), 16 states have call successors, (69) [2025-03-03 14:33:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 161 transitions. [2025-03-03 14:33:11,218 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 161 transitions. Word has length 610 [2025-03-03 14:33:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:11,218 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 161 transitions. [2025-03-03 14:33:11,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2025-03-03 14:33:11,219 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 161 transitions. [2025-03-03 14:33:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2025-03-03 14:33:11,223 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:11,223 INFO L218 NwaCegarLoop]: trace histogram [139, 139, 112, 69, 69, 69, 69, 69, 69, 69, 43, 27, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:11,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 14:33:11,424 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,SelfDestructingSolverStorable12 [2025-03-03 14:33:11,424 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:11,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:11,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1735542590, now seen corresponding path program 11 times [2025-03-03 14:33:11,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:11,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731042791] [2025-03-03 14:33:11,425 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:11,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:11,440 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 950 statements into 121 equivalence classes. [2025-03-03 14:33:11,504 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) and asserted 515 of 950 statements. [2025-03-03 14:33:11,504 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2025-03-03 14:33:11,504 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 53964 backedges. 2989 proven. 2195 refuted. 0 times theorem prover too weak. 48780 trivial. 0 not checked. [2025-03-03 14:33:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731042791] [2025-03-03 14:33:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731042791] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437234812] [2025-03-03 14:33:11,853 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:11,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:11,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:11,855 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) [2025-03-03 14:33:11,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 14:33:11,985 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 950 statements into 121 equivalence classes. [2025-03-03 14:33:12,109 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) and asserted 515 of 950 statements. [2025-03-03 14:33:12,110 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2025-03-03 14:33:12,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:12,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:33:12,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 53964 backedges. 28800 proven. 140 refuted. 0 times theorem prover too weak. 25024 trivial. 0 not checked. [2025-03-03 14:33:12,185 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 53964 backedges. 3242 proven. 2442 refuted. 0 times theorem prover too weak. 48280 trivial. 0 not checked. [2025-03-03 14:33:14,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437234812] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:14,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:14,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 15] total 22 [2025-03-03 14:33:14,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576476060] [2025-03-03 14:33:14,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:14,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 14:33:14,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:14,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 14:33:14,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:33:14,407 INFO L87 Difference]: Start difference. First operand 94 states and 161 transitions. Second operand has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 15 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (25), 9 states have call predecessors, (25), 15 states have call successors, (25) [2025-03-03 14:33:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:14,573 INFO L93 Difference]: Finished difference Result 206 states and 423 transitions. [2025-03-03 14:33:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:33:14,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 15 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (25), 9 states have call predecessors, (25), 15 states have call successors, (25) Word has length 950 [2025-03-03 14:33:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:14,575 INFO L225 Difference]: With dead ends: 206 [2025-03-03 14:33:14,575 INFO L226 Difference]: Without dead ends: 109 [2025-03-03 14:33:14,576 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1925 GetRequests, 1887 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2025-03-03 14:33:14,576 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:14,576 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 128 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-03 14:33:14,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2025-03-03 14:33:14,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 70 states have internal predecessors, (76), 19 states have call successors, (19), 13 states have call predecessors, (19), 11 states have return successors, (75), 20 states have call predecessors, (75), 19 states have call successors, (75) [2025-03-03 14:33:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 170 transitions. [2025-03-03 14:33:14,588 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 170 transitions. Word has length 950 [2025-03-03 14:33:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:14,588 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 170 transitions. [2025-03-03 14:33:14,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 15 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (25), 9 states have call predecessors, (25), 15 states have call successors, (25) [2025-03-03 14:33:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 170 transitions. [2025-03-03 14:33:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1033 [2025-03-03 14:33:14,594 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:14,595 INFO L218 NwaCegarLoop]: trace histogram [151, 151, 122, 75, 75, 75, 75, 75, 75, 75, 47, 29, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:14,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:14,795 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,SelfDestructingSolverStorable13 [2025-03-03 14:33:14,795 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:14,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:14,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1116842626, now seen corresponding path program 12 times [2025-03-03 14:33:14,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:14,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547472817] [2025-03-03 14:33:14,796 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:14,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:14,811 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1032 statements into 126 equivalence classes. [2025-03-03 14:33:14,823 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 175 of 1032 statements. [2025-03-03 14:33:14,823 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-03 14:33:14,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1438 proven. 4929 refuted. 0 times theorem prover too weak. 57414 trivial. 0 not checked. [2025-03-03 14:33:14,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:14,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547472817] [2025-03-03 14:33:14,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547472817] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:14,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099582716] [2025-03-03 14:33:14,969 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:14,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:14,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:14,972 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) [2025-03-03 14:33:14,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 14:33:15,114 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1032 statements into 126 equivalence classes. [2025-03-03 14:33:15,152 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 175 of 1032 statements. [2025-03-03 14:33:15,153 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-03 14:33:15,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:15,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:33:15,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1438 proven. 4929 refuted. 0 times theorem prover too weak. 57414 trivial. 0 not checked. [2025-03-03 14:33:15,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1446 proven. 4998 refuted. 0 times theorem prover too weak. 57337 trivial. 0 not checked. [2025-03-03 14:33:18,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099582716] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:18,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:18,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 20 [2025-03-03 14:33:18,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012634946] [2025-03-03 14:33:18,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:18,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 14:33:18,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:18,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 14:33:18,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:33:18,220 INFO L87 Difference]: Start difference. First operand 104 states and 170 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 16 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 16 states have call successors, (25) [2025-03-03 14:33:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:18,331 INFO L93 Difference]: Finished difference Result 123 states and 225 transitions. [2025-03-03 14:33:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:33:18,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 16 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 16 states have call successors, (25) Word has length 1032 [2025-03-03 14:33:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:18,335 INFO L225 Difference]: With dead ends: 123 [2025-03-03 14:33:18,335 INFO L226 Difference]: Without dead ends: 119 [2025-03-03 14:33:18,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2088 GetRequests, 2054 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:33:18,336 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:18,336 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 85 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-03-03 14:33:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2025-03-03 14:33:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 70 states have internal predecessors, (76), 19 states have call successors, (19), 13 states have call predecessors, (19), 11 states have return successors, (75), 20 states have call predecessors, (75), 19 states have call successors, (75) [2025-03-03 14:33:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 170 transitions. [2025-03-03 14:33:18,345 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 170 transitions. Word has length 1032 [2025-03-03 14:33:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:18,345 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 170 transitions. [2025-03-03 14:33:18,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 16 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 16 states have call successors, (25) [2025-03-03 14:33:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 170 transitions. [2025-03-03 14:33:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1660 [2025-03-03 14:33:18,357 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:18,357 INFO L218 NwaCegarLoop]: trace histogram [243, 243, 197, 121, 121, 121, 121, 121, 121, 121, 76, 46, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:18,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-03 14:33:18,561 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,SelfDestructingSolverStorable14 [2025-03-03 14:33:18,561 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:18,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2114497429, now seen corresponding path program 13 times [2025-03-03 14:33:18,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:18,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691168792] [2025-03-03 14:33:18,562 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:18,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:18,583 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1659 statements into 1 equivalence classes. [2025-03-03 14:33:18,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1659 of 1659 statements. [2025-03-03 14:33:18,727 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:18,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 165958 backedges. 1316 proven. 10466 refuted. 0 times theorem prover too weak. 154176 trivial. 0 not checked. [2025-03-03 14:33:20,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:20,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691168792] [2025-03-03 14:33:20,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691168792] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:20,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941954240] [2025-03-03 14:33:20,273 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:20,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:20,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:20,275 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) [2025-03-03 14:33:20,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 14:33:20,470 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1659 statements into 1 equivalence classes. [2025-03-03 14:33:20,729 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1659 of 1659 statements. [2025-03-03 14:33:20,729 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:20,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:20,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 3702 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 14:33:20,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 165958 backedges. 1316 proven. 10466 refuted. 0 times theorem prover too weak. 154176 trivial. 0 not checked. [2025-03-03 14:33:20,864 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 165958 backedges. 1316 proven. 10566 refuted. 0 times theorem prover too weak. 154076 trivial. 0 not checked. [2025-03-03 14:33:25,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941954240] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:25,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:25,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 22 [2025-03-03 14:33:25,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535801798] [2025-03-03 14:33:25,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:25,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 14:33:25,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:25,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 14:33:25,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:33:25,489 INFO L87 Difference]: Start difference. First operand 104 states and 170 transitions. Second operand has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 19 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (27), 10 states have call predecessors, (27), 19 states have call successors, (27) [2025-03-03 14:33:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:25,620 INFO L93 Difference]: Finished difference Result 128 states and 248 transitions. [2025-03-03 14:33:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:33:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 19 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (27), 10 states have call predecessors, (27), 19 states have call successors, (27) Word has length 1659 [2025-03-03 14:33:25,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:25,624 INFO L225 Difference]: With dead ends: 128 [2025-03-03 14:33:25,624 INFO L226 Difference]: Without dead ends: 124 [2025-03-03 14:33:25,624 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3345 GetRequests, 3307 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2025-03-03 14:33:25,625 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:25,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 108 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-03-03 14:33:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 109. [2025-03-03 14:33:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 73 states have internal predecessors, (79), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (89), 22 states have call predecessors, (89), 20 states have call successors, (89) [2025-03-03 14:33:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 188 transitions. [2025-03-03 14:33:25,635 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 188 transitions. Word has length 1659 [2025-03-03 14:33:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:25,636 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 188 transitions. [2025-03-03 14:33:25,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 19 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (27), 10 states have call predecessors, (27), 19 states have call successors, (27) [2025-03-03 14:33:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 188 transitions. [2025-03-03 14:33:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1769 [2025-03-03 14:33:25,649 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:25,650 INFO L218 NwaCegarLoop]: trace histogram [259, 259, 210, 129, 129, 129, 129, 129, 129, 129, 81, 49, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:25,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:25,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:25,851 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:25,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash 585493952, now seen corresponding path program 14 times [2025-03-03 14:33:25,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:25,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315776301] [2025-03-03 14:33:25,851 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:25,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:25,875 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1768 statements into 2 equivalence classes. [2025-03-03 14:33:26,012 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1768 of 1768 statements. [2025-03-03 14:33:26,012 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:26,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 188613 backedges. 2845 proven. 8826 refuted. 0 times theorem prover too weak. 176942 trivial. 0 not checked. [2025-03-03 14:33:27,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:27,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315776301] [2025-03-03 14:33:27,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315776301] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:27,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784698789] [2025-03-03 14:33:27,773 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:27,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:27,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:27,775 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) [2025-03-03 14:33:27,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 14:33:27,977 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1768 statements into 2 equivalence classes. [2025-03-03 14:33:28,217 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1768 of 1768 statements. [2025-03-03 14:33:28,217 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:28,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:28,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 3944 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:33:28,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 188613 backedges. 3230 proven. 10767 refuted. 0 times theorem prover too weak. 174616 trivial. 0 not checked. [2025-03-03 14:33:28,387 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 188613 backedges. 3234 proven. 10880 refuted. 0 times theorem prover too weak. 174499 trivial. 0 not checked. [2025-03-03 14:33:33,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784698789] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:33,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:33,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 27 [2025-03-03 14:33:33,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714962473] [2025-03-03 14:33:33,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:33,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 14:33:33,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:33,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 14:33:33,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:33:33,859 INFO L87 Difference]: Start difference. First operand 109 states and 188 transitions. Second operand has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 27 states have internal predecessors, (80), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) [2025-03-03 14:33:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:34,037 INFO L93 Difference]: Finished difference Result 195 states and 588 transitions. [2025-03-03 14:33:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:33:34,037 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 27 states have internal predecessors, (80), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) Word has length 1768 [2025-03-03 14:33:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:34,040 INFO L225 Difference]: With dead ends: 195 [2025-03-03 14:33:34,040 INFO L226 Difference]: Without dead ends: 126 [2025-03-03 14:33:34,041 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3564 GetRequests, 3519 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=429, Invalid=831, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 14:33:34,042 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:34,042 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 210 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2025-03-03 14:33:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2025-03-03 14:33:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 83 states have (on average 1.036144578313253) internal successors, (86), 80 states have internal predecessors, (86), 21 states have call successors, (21), 13 states have call predecessors, (21), 15 states have return successors, (76), 26 states have call predecessors, (76), 21 states have call successors, (76) [2025-03-03 14:33:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 183 transitions. [2025-03-03 14:33:34,050 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 183 transitions. Word has length 1768 [2025-03-03 14:33:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:34,051 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 183 transitions. [2025-03-03 14:33:34,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 27 states have internal predecessors, (80), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) [2025-03-03 14:33:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 183 transitions. [2025-03-03 14:33:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1346 [2025-03-03 14:33:34,058 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:34,059 INFO L218 NwaCegarLoop]: trace histogram [197, 197, 159, 98, 98, 98, 98, 98, 98, 98, 61, 38, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:34,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:34,259 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,SelfDestructingSolverStorable16 [2025-03-03 14:33:34,259 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:34,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1452812813, now seen corresponding path program 15 times [2025-03-03 14:33:34,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:34,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792534914] [2025-03-03 14:33:34,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:34,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:34,279 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1345 statements into 161 equivalence classes. [2025-03-03 14:33:34,405 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 114 check-sat command(s) and asserted 980 of 1345 statements. [2025-03-03 14:33:34,405 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 114 check-sat command(s) [2025-03-03 14:33:34,406 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 108797 backedges. 3770 proven. 3057 refuted. 0 times theorem prover too weak. 101970 trivial. 0 not checked. [2025-03-03 14:33:35,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:35,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792534914] [2025-03-03 14:33:35,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792534914] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:35,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804964481] [2025-03-03 14:33:35,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:35,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:35,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:35,092 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) [2025-03-03 14:33:35,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 14:33:35,313 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1345 statements into 161 equivalence classes. [2025-03-03 14:33:35,634 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 114 check-sat command(s) and asserted 980 of 1345 statements. [2025-03-03 14:33:35,635 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 114 check-sat command(s) [2025-03-03 14:33:35,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:35,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:33:35,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 108797 backedges. 4089 proven. 3254 refuted. 0 times theorem prover too weak. 101454 trivial. 0 not checked. [2025-03-03 14:33:35,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 108797 backedges. 4097 proven. 3309 refuted. 0 times theorem prover too weak. 101391 trivial. 0 not checked. [2025-03-03 14:33:38,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804964481] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:38,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:38,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 17] total 21 [2025-03-03 14:33:38,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059851625] [2025-03-03 14:33:38,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:38,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 14:33:38,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:38,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 14:33:38,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:33:38,979 INFO L87 Difference]: Start difference. First operand 120 states and 183 transitions. Second operand has 21 states, 20 states have (on average 3.15) internal successors, (63), 21 states have internal predecessors, (63), 12 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2025-03-03 14:33:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:39,134 INFO L93 Difference]: Finished difference Result 333 states and 599 transitions. [2025-03-03 14:33:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:33:39,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 21 states have internal predecessors, (63), 12 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) Word has length 1345 [2025-03-03 14:33:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:39,137 INFO L225 Difference]: With dead ends: 333 [2025-03-03 14:33:39,138 INFO L226 Difference]: Without dead ends: 162 [2025-03-03 14:33:39,139 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2714 GetRequests, 2680 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:33:39,140 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:39,140 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 126 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2025-03-03 14:33:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 144. [2025-03-03 14:33:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 96 states have internal predecessors, (102), 27 states have call successors, (27), 16 states have call predecessors, (27), 17 states have return successors, (88), 31 states have call predecessors, (88), 27 states have call successors, (88) [2025-03-03 14:33:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 217 transitions. [2025-03-03 14:33:39,149 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 217 transitions. Word has length 1345 [2025-03-03 14:33:39,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:39,150 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 217 transitions. [2025-03-03 14:33:39,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 21 states have internal predecessors, (63), 12 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2025-03-03 14:33:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 217 transitions. [2025-03-03 14:33:39,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1605 [2025-03-03 14:33:39,160 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:39,161 INFO L218 NwaCegarLoop]: trace histogram [235, 235, 190, 117, 117, 117, 117, 117, 117, 117, 73, 45, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:39,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:39,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 14:33:39,361 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:39,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:39,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1024193834, now seen corresponding path program 16 times [2025-03-03 14:33:39,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:39,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667438141] [2025-03-03 14:33:39,362 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:33:39,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:39,384 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1604 statements into 2 equivalence classes. [2025-03-03 14:33:39,482 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1367 of 1604 statements. [2025-03-03 14:33:39,483 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:33:39,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 155079 backedges. 4127 proven. 6424 refuted. 0 times theorem prover too weak. 144528 trivial. 0 not checked. [2025-03-03 14:33:40,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:40,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667438141] [2025-03-03 14:33:40,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667438141] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:40,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192014938] [2025-03-03 14:33:40,557 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:33:40,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:40,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:40,559 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:40,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 14:33:40,792 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1604 statements into 2 equivalence classes. [2025-03-03 14:33:40,947 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1367 of 1604 statements. [2025-03-03 14:33:40,947 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:33:40,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:40,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 2854 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:33:40,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 155079 backedges. 4887 proven. 8186 refuted. 0 times theorem prover too weak. 142006 trivial. 0 not checked. [2025-03-03 14:33:41,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 155079 backedges. 4889 proven. 8301 refuted. 0 times theorem prover too weak. 141889 trivial. 0 not checked. [2025-03-03 14:33:46,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192014938] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:46,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:46,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 27 [2025-03-03 14:33:46,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468008434] [2025-03-03 14:33:46,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:46,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 14:33:46,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:46,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 14:33:46,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:33:46,190 INFO L87 Difference]: Start difference. First operand 144 states and 217 transitions. Second operand has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) [2025-03-03 14:33:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:46,352 INFO L93 Difference]: Finished difference Result 178 states and 268 transitions. [2025-03-03 14:33:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:33:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) Word has length 1604 [2025-03-03 14:33:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:46,355 INFO L225 Difference]: With dead ends: 178 [2025-03-03 14:33:46,355 INFO L226 Difference]: Without dead ends: 166 [2025-03-03 14:33:46,355 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3236 GetRequests, 3191 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=429, Invalid=831, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 14:33:46,356 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:46,356 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 185 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2025-03-03 14:33:46,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 149. [2025-03-03 14:33:46,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 99 states have internal predecessors, (105), 28 states have call successors, (28), 16 states have call predecessors, (28), 18 states have return successors, (91), 33 states have call predecessors, (91), 28 states have call successors, (91) [2025-03-03 14:33:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 224 transitions. [2025-03-03 14:33:46,388 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 224 transitions. Word has length 1604 [2025-03-03 14:33:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:46,388 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 224 transitions. [2025-03-03 14:33:46,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) [2025-03-03 14:33:46,389 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 224 transitions. [2025-03-03 14:33:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1428 [2025-03-03 14:33:46,397 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:46,397 INFO L218 NwaCegarLoop]: trace histogram [209, 209, 169, 104, 104, 104, 104, 104, 104, 104, 65, 40, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:46,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 14:33:46,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:46,598 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:46,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1915897961, now seen corresponding path program 17 times [2025-03-03 14:33:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:46,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883557365] [2025-03-03 14:33:46,599 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:46,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:46,620 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1427 statements into 171 equivalence classes. [2025-03-03 14:33:46,680 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) and asserted 855 of 1427 statements. [2025-03-03 14:33:46,680 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2025-03-03 14:33:46,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 122564 backedges. 9052 proven. 4234 refuted. 0 times theorem prover too weak. 109278 trivial. 0 not checked. [2025-03-03 14:33:47,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883557365] [2025-03-03 14:33:47,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883557365] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731398335] [2025-03-03 14:33:47,349 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:47,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:47,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:47,351 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:47,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 14:33:47,609 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1427 statements into 171 equivalence classes. [2025-03-03 14:33:47,857 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) and asserted 855 of 1427 statements. [2025-03-03 14:33:47,857 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2025-03-03 14:33:47,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:47,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 14:33:47,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 122564 backedges. 57346 proven. 813 refuted. 0 times theorem prover too weak. 64405 trivial. 0 not checked. [2025-03-03 14:33:47,972 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 122564 backedges. 9033 proven. 4282 refuted. 0 times theorem prover too weak. 109249 trivial. 0 not checked. [2025-03-03 14:33:52,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731398335] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:52,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:52,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 22] total 29 [2025-03-03 14:33:52,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695602147] [2025-03-03 14:33:52,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:52,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 14:33:52,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:52,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 14:33:52,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:33:52,168 INFO L87 Difference]: Start difference. First operand 149 states and 224 transitions. Second operand has 29 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 29 states have internal predecessors, (89), 22 states have call successors, (27), 2 states have call predecessors, (27), 11 states have return successors, (35), 11 states have call predecessors, (35), 22 states have call successors, (35) [2025-03-03 14:33:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:52,438 INFO L93 Difference]: Finished difference Result 307 states and 483 transitions. [2025-03-03 14:33:52,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 14:33:52,439 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 29 states have internal predecessors, (89), 22 states have call successors, (27), 2 states have call predecessors, (27), 11 states have return successors, (35), 11 states have call predecessors, (35), 22 states have call successors, (35) Word has length 1427 [2025-03-03 14:33:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:52,441 INFO L225 Difference]: With dead ends: 307 [2025-03-03 14:33:52,441 INFO L226 Difference]: Without dead ends: 161 [2025-03-03 14:33:52,443 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2894 GetRequests, 2838 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1662, Unknown=0, NotChecked=0, Total=2256 [2025-03-03 14:33:52,444 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 237 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:52,444 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 124 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2025-03-03 14:33:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 137. [2025-03-03 14:33:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 92 states have internal predecessors, (98), 25 states have call successors, (25), 16 states have call predecessors, (25), 16 states have return successors, (71), 28 states have call predecessors, (71), 25 states have call successors, (71) [2025-03-03 14:33:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 194 transitions. [2025-03-03 14:33:52,457 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 194 transitions. Word has length 1427 [2025-03-03 14:33:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:52,458 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 194 transitions. [2025-03-03 14:33:52,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 29 states have internal predecessors, (89), 22 states have call successors, (27), 2 states have call predecessors, (27), 11 states have return successors, (35), 11 states have call predecessors, (35), 22 states have call successors, (35) [2025-03-03 14:33:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 194 transitions. [2025-03-03 14:33:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1510 [2025-03-03 14:33:52,467 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:52,468 INFO L218 NwaCegarLoop]: trace histogram [221, 221, 179, 110, 110, 110, 110, 110, 110, 110, 69, 42, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:52,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 14:33:52,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:52,668 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:52,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:52,669 INFO L85 PathProgramCache]: Analyzing trace with hash -79411675, now seen corresponding path program 18 times [2025-03-03 14:33:52,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:52,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305656945] [2025-03-03 14:33:52,669 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:52,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:52,690 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1509 statements into 189 equivalence classes. [2025-03-03 14:33:52,750 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) and asserted 620 of 1509 statements. [2025-03-03 14:33:52,750 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2025-03-03 14:33:52,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 137151 backedges. 7047 proven. 920 refuted. 0 times theorem prover too weak. 129184 trivial. 0 not checked. [2025-03-03 14:33:53,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:53,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305656945] [2025-03-03 14:33:53,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305656945] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:53,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239236015] [2025-03-03 14:33:53,061 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:53,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:53,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:53,062 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:53,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 14:33:53,368 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1509 statements into 189 equivalence classes. [2025-03-03 14:33:53,524 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) and asserted 620 of 1509 statements. [2025-03-03 14:33:53,524 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2025-03-03 14:33:53,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:53,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:33:53,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 137151 backedges. 34139 proven. 123 refuted. 0 times theorem prover too weak. 102889 trivial. 0 not checked. [2025-03-03 14:33:53,591 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 137151 backedges. 7051 proven. 925 refuted. 0 times theorem prover too weak. 129175 trivial. 0 not checked. [2025-03-03 14:33:56,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239236015] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:56,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:56,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 17 [2025-03-03 14:33:56,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12470708] [2025-03-03 14:33:56,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:56,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:33:56,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:56,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:33:56,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:33:56,526 INFO L87 Difference]: Start difference. First operand 137 states and 194 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 8 states have call successors, (17), 2 states have call predecessors, (17), 8 states have return successors, (23), 11 states have call predecessors, (23), 8 states have call successors, (23) [2025-03-03 14:33:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:56,650 INFO L93 Difference]: Finished difference Result 271 states and 399 transitions. [2025-03-03 14:33:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 14:33:56,650 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 8 states have call successors, (17), 2 states have call predecessors, (17), 8 states have return successors, (23), 11 states have call predecessors, (23), 8 states have call successors, (23) Word has length 1509 [2025-03-03 14:33:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:56,652 INFO L225 Difference]: With dead ends: 271 [2025-03-03 14:33:56,652 INFO L226 Difference]: Without dead ends: 133 [2025-03-03 14:33:56,653 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3037 GetRequests, 3008 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:33:56,654 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:56,654 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 111 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:56,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2025-03-03 14:33:56,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2025-03-03 14:33:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 83 states have internal predecessors, (89), 22 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (59), 24 states have call predecessors, (59), 22 states have call successors, (59) [2025-03-03 14:33:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 170 transitions. [2025-03-03 14:33:56,661 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 170 transitions. Word has length 1509 [2025-03-03 14:33:56,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:56,661 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 170 transitions. [2025-03-03 14:33:56,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 8 states have call successors, (17), 2 states have call predecessors, (17), 8 states have return successors, (23), 11 states have call predecessors, (23), 8 states have call successors, (23) [2025-03-03 14:33:56,661 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 170 transitions. [2025-03-03 14:33:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1387 [2025-03-03 14:33:56,669 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:56,669 INFO L218 NwaCegarLoop]: trace histogram [203, 203, 164, 101, 101, 101, 101, 101, 101, 101, 63, 39, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:56,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-03 14:33:56,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:56,871 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:56,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:56,871 INFO L85 PathProgramCache]: Analyzing trace with hash 835782292, now seen corresponding path program 19 times [2025-03-03 14:33:56,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:56,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66456576] [2025-03-03 14:33:56,871 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:56,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:56,891 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1386 statements into 1 equivalence classes. [2025-03-03 14:33:57,013 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1386 of 1386 statements. [2025-03-03 14:33:57,013 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:57,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 115578 backedges. 5971 proven. 3092 refuted. 0 times theorem prover too weak. 106515 trivial. 0 not checked. [2025-03-03 14:33:58,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:58,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66456576] [2025-03-03 14:33:58,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66456576] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:58,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635621665] [2025-03-03 14:33:58,335 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:58,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:58,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:58,337 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:58,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 14:33:58,622 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1386 statements into 1 equivalence classes. [2025-03-03 14:33:58,804 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1386 of 1386 statements. [2025-03-03 14:33:58,804 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:58,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:58,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:33:58,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 115578 backedges. 7219 proven. 3994 refuted. 0 times theorem prover too weak. 104365 trivial. 0 not checked. [2025-03-03 14:33:58,901 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 115578 backedges. 7219 proven. 4111 refuted. 0 times theorem prover too weak. 104248 trivial. 0 not checked. [2025-03-03 14:34:03,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635621665] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:03,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:03,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 27 [2025-03-03 14:34:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752481828] [2025-03-03 14:34:03,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:03,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 14:34:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:03,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 14:34:03,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:34:03,679 INFO L87 Difference]: Start difference. First operand 123 states and 170 transitions. Second operand has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) [2025-03-03 14:34:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:03,827 INFO L93 Difference]: Finished difference Result 155 states and 216 transitions. [2025-03-03 14:34:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:34:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) Word has length 1386 [2025-03-03 14:34:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:03,831 INFO L225 Difference]: With dead ends: 155 [2025-03-03 14:34:03,831 INFO L226 Difference]: Without dead ends: 148 [2025-03-03 14:34:03,832 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2800 GetRequests, 2755 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=429, Invalid=831, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 14:34:03,833 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:03,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 225 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:03,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2025-03-03 14:34:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 128. [2025-03-03 14:34:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 86 states have internal predecessors, (92), 23 states have call successors, (23), 15 states have call predecessors, (23), 15 states have return successors, (55), 26 states have call predecessors, (55), 23 states have call successors, (55) [2025-03-03 14:34:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 170 transitions. [2025-03-03 14:34:03,841 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 170 transitions. Word has length 1386 [2025-03-03 14:34:03,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:03,842 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 170 transitions. [2025-03-03 14:34:03,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 27 states have internal predecessors, (82), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) [2025-03-03 14:34:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 170 transitions. [2025-03-03 14:34:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1278 [2025-03-03 14:34:03,849 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:03,850 INFO L218 NwaCegarLoop]: trace histogram [187, 187, 151, 93, 93, 93, 93, 93, 93, 93, 58, 36, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:03,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-03 14:34:04,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 14:34:04,050 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:04,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:04,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1020914579, now seen corresponding path program 20 times [2025-03-03 14:34:04,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:04,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427102619] [2025-03-03 14:34:04,051 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:04,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:04,071 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1277 statements into 2 equivalence classes. [2025-03-03 14:34:04,138 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1277 of 1277 statements. [2025-03-03 14:34:04,139 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:04,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 1601 proven. 8691 refuted. 0 times theorem prover too weak. 87709 trivial. 0 not checked. [2025-03-03 14:34:05,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:05,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427102619] [2025-03-03 14:34:05,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427102619] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:05,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201427623] [2025-03-03 14:34:05,394 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:05,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:05,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:05,396 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:05,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 14:34:05,719 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1277 statements into 2 equivalence classes. [2025-03-03 14:34:05,888 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1277 of 1277 statements. [2025-03-03 14:34:05,888 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:05,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:05,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 2854 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 14:34:05,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 1610 proven. 9313 refuted. 0 times theorem prover too weak. 87078 trivial. 0 not checked. [2025-03-03 14:34:05,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 1610 proven. 9458 refuted. 0 times theorem prover too weak. 86933 trivial. 0 not checked. [2025-03-03 14:34:11,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201427623] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:11,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:11,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 25] total 29 [2025-03-03 14:34:11,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691199684] [2025-03-03 14:34:11,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:11,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 14:34:11,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:11,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 14:34:11,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:34:11,298 INFO L87 Difference]: Start difference. First operand 128 states and 170 transitions. Second operand has 29 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 29 states have internal predecessors, (85), 24 states have call successors, (26), 1 states have call predecessors, (26), 12 states have return successors, (35), 13 states have call predecessors, (35), 24 states have call successors, (35) [2025-03-03 14:34:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:11,459 INFO L93 Difference]: Finished difference Result 203 states and 266 transitions. [2025-03-03 14:34:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:34:11,459 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 29 states have internal predecessors, (85), 24 states have call successors, (26), 1 states have call predecessors, (26), 12 states have return successors, (35), 13 states have call predecessors, (35), 24 states have call successors, (35) Word has length 1277 [2025-03-03 14:34:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:11,461 INFO L225 Difference]: With dead ends: 203 [2025-03-03 14:34:11,461 INFO L226 Difference]: Without dead ends: 116 [2025-03-03 14:34:11,462 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2587 GetRequests, 2538 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=504, Invalid=978, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 14:34:11,462 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 16 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:11,462 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 208 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-03 14:34:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2025-03-03 14:34:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 75 states have internal predecessors, (81), 20 states have call successors, (20), 15 states have call predecessors, (20), 11 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2025-03-03 14:34:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2025-03-03 14:34:11,469 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 1277 [2025-03-03 14:34:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:11,469 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2025-03-03 14:34:11,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 29 states have internal predecessors, (85), 24 states have call successors, (26), 1 states have call predecessors, (26), 12 states have return successors, (35), 13 states have call predecessors, (35), 24 states have call successors, (35) [2025-03-03 14:34:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2025-03-03 14:34:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1210 [2025-03-03 14:34:11,476 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:11,476 INFO L218 NwaCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:11,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-03 14:34:11,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-03 14:34:11,677 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:11,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:11,677 INFO L85 PathProgramCache]: Analyzing trace with hash -686723943, now seen corresponding path program 21 times [2025-03-03 14:34:11,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:11,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742723879] [2025-03-03 14:34:11,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:11,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:11,696 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1209 statements into 144 equivalence classes. [2025-03-03 14:34:11,849 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 144 check-sat command(s) and asserted 1209 of 1209 statements. [2025-03-03 14:34:11,849 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 144 check-sat command(s) [2025-03-03 14:34:11,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat