./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.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 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:44:13,989 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:44:14,035 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:44:14,040 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:44:14,040 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:44:14,065 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:44:14,065 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:44:14,065 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:44:14,066 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:44:14,066 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:44:14,066 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:44:14,066 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:44:14,066 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:44:14,066 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:44:14,066 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:44:14,066 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:44:14,066 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:44:14,066 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:44:14,068 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:44:14,068 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:44:14,068 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:44:14,068 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:44:14,069 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:44:14,069 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:44:14,069 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:44:14,070 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:44:14,070 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:44:14,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:44:14,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:44:14,070 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:44:14,070 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:44:14,070 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:44:14,070 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 -> 0642f258b99d0be7a55bf1ef77240ba2f36dd3da56337cf262b8aebc4e0cc323 [2025-03-08 05:44:14,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:44:14,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:44:14,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:44:14,289 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:44:14,289 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:44:14,290 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2025-03-08 05:44:15,411 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ea7496b/fd24dcf46f694788853010110f21085d/FLAGf3c74c0a5 [2025-03-08 05:44:15,587 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:44:15,588 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2025-03-08 05:44:15,594 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ea7496b/fd24dcf46f694788853010110f21085d/FLAGf3c74c0a5 [2025-03-08 05:44:15,977 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15ea7496b/fd24dcf46f694788853010110f21085d [2025-03-08 05:44:15,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:44:15,980 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:44:15,981 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:44:15,981 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:44:15,984 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:44:15,985 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:44:15" (1/1) ... [2025-03-08 05:44:15,986 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b43af4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:15, skipping insertion in model container [2025-03-08 05:44:15,987 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:44:15" (1/1) ... [2025-03-08 05:44:15,995 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:44:16,102 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_2calls_20-1.c[951,964] [2025-03-08 05:44:16,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:44:16,112 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:44:16,123 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_2calls_20-1.c[951,964] [2025-03-08 05:44:16,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:44:16,133 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:44:16,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16 WrapperNode [2025-03-08 05:44:16,134 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:44:16,136 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:44:16,136 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:44:16,136 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:44:16,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,146 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,157 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-08 05:44:16,157 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:44:16,158 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:44:16,158 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:44:16,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:44:16,163 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,168 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,178 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]. [2025-03-08 05:44:16,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,181 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,183 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,183 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,186 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,187 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:44:16,188 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:44:16,188 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:44:16,188 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:44:16,188 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (1/1) ... [2025-03-08 05:44:16,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:44:16,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:16,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 05:44:16,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 05:44:16,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:44:16,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:44:16,237 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-03-08 05:44:16,237 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-03-08 05:44:16,237 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-03-08 05:44:16,237 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-03-08 05:44:16,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:44:16,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:44:16,282 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:44:16,283 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:44:16,359 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-03-08 05:44:16,371 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-03-08 05:44:16,377 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-08 05:44:16,377 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:44:16,382 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:44:16,382 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:44:16,382 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:44:16 BoogieIcfgContainer [2025-03-08 05:44:16,383 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:44:16,384 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:44:16,384 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:44:16,387 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:44:16,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:44:15" (1/3) ... [2025-03-08 05:44:16,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17cfa3f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:44:16, skipping insertion in model container [2025-03-08 05:44:16,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:16" (2/3) ... [2025-03-08 05:44:16,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17cfa3f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:44:16, skipping insertion in model container [2025-03-08 05:44:16,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:44:16" (3/3) ... [2025-03-08 05:44:16,389 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2025-03-08 05:44:16,399 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:44:16,400 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_20-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:44:16,442 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:44:16,450 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;@4d142c25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:44:16,450 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:44:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:44:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 05:44:16,458 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:16,458 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:16,458 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:16,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:16,463 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-03-08 05:44:16,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:16,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229759376] [2025-03-08 05:44:16,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:16,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:16,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 05:44:16,519 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 05:44:16,520 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:16,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:44:16,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:16,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229759376] [2025-03-08 05:44:16,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229759376] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:44:16,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:44:16,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:44:16,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454770869] [2025-03-08 05:44:16,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:44:16,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:44:16,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:16,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:44:16,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:16,620 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2025-03-08 05:44:16,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:16,653 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2025-03-08 05:44:16,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:44:16,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2025-03-08 05:44:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:16,658 INFO L225 Difference]: With dead ends: 39 [2025-03-08 05:44:16,658 INFO L226 Difference]: Without dead ends: 27 [2025-03-08 05:44:16,660 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 [2025-03-08 05:44:16,662 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:16,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:44:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-08 05:44:16,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-03-08 05:44:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 05:44:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-08 05:44:16,687 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-03-08 05:44:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:16,687 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-08 05:44:16,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2025-03-08 05:44:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-08 05:44:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 05:44:16,688 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:16,688 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:16,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:44:16,689 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:16,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-03-08 05:44:16,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:16,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737078103] [2025-03-08 05:44:16,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:16,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:16,697 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 05:44:16,704 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 05:44:16,704 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:16,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:44:16,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737078103] [2025-03-08 05:44:16,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737078103] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:44:16,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:44:16,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:44:16,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840685219] [2025-03-08 05:44:16,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:44:16,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:44:16,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:16,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:44:16,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:16,765 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2025-03-08 05:44:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:16,784 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-08 05:44:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:44:16,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2025-03-08 05:44:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:16,787 INFO L225 Difference]: With dead ends: 33 [2025-03-08 05:44:16,787 INFO L226 Difference]: Without dead ends: 29 [2025-03-08 05:44:16,788 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 [2025-03-08 05:44:16,788 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:16,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:44:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-08 05:44:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-08 05:44:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 05:44:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-08 05:44:16,795 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-03-08 05:44:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:16,795 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-08 05:44:16,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2025-03-08 05:44:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-08 05:44:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 05:44:16,796 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:16,796 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:16,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:44:16,796 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:16,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-03-08 05:44:16,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:16,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408032257] [2025-03-08 05:44:16,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:16,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:16,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:44:16,809 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:44:16,809 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:16,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:16,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:16,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408032257] [2025-03-08 05:44:16,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408032257] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:16,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689660898] [2025-03-08 05:44:16,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:16,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:16,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:16,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:16,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:44:16,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:44:16,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:44:16,921 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:16,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:16,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:44:16,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:16,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:17,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689660898] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:17,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:17,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-08 05:44:17,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491548287] [2025-03-08 05:44:17,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:17,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 05:44:17,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:17,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 05:44:17,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-08 05:44:17,156 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 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) [2025-03-08 05:44:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:17,252 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-03-08 05:44:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:44:17,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 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 [2025-03-08 05:44:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:17,253 INFO L225 Difference]: With dead ends: 55 [2025-03-08 05:44:17,253 INFO L226 Difference]: Without dead ends: 31 [2025-03-08 05:44:17,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:44:17,254 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:17,254 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:17,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-08 05:44:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-03-08 05:44:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-08 05:44:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-08 05:44:17,258 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-03-08 05:44:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:17,258 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-08 05:44:17,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 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) [2025-03-08 05:44:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-08 05:44:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 05:44:17,259 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:17,259 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:17,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:44:17,460 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 [2025-03-08 05:44:17,461 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:17,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-03-08 05:44:17,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:17,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83421146] [2025-03-08 05:44:17,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:17,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:17,467 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:44:17,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:44:17,471 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:17,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:17,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:17,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83421146] [2025-03-08 05:44:17,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83421146] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:17,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40418908] [2025-03-08 05:44:17,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:17,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:17,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:17,550 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:17,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:44:17,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:44:17,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:44:17,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:17,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:17,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:44:17,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:17,605 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:17,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40418908] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:17,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:17,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-08 05:44:17,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903429578] [2025-03-08 05:44:17,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:17,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 05:44:17,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:17,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 05:44:17,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:44:17,751 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 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) [2025-03-08 05:44:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:17,859 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-08 05:44:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:44:17,859 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 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 [2025-03-08 05:44:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:17,860 INFO L225 Difference]: With dead ends: 40 [2025-03-08 05:44:17,860 INFO L226 Difference]: Without dead ends: 36 [2025-03-08 05:44:17,860 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:44:17,861 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:17,861 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-08 05:44:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-03-08 05:44:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-03-08 05:44:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-03-08 05:44:17,865 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-03-08 05:44:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:17,866 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-03-08 05:44:17,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 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) [2025-03-08 05:44:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-03-08 05:44:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 05:44:17,867 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:17,867 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:17,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:18,067 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 [2025-03-08 05:44:18,067 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:18,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-03-08 05:44:18,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:18,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329710642] [2025-03-08 05:44:18,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:18,072 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 05:44:18,076 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 05:44:18,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:18,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:44:18,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:18,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329710642] [2025-03-08 05:44:18,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329710642] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:18,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732322688] [2025-03-08 05:44:18,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:18,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:18,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:18,142 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:18,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:44:18,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 05:44:18,174 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 05:44:18,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:18,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:18,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:44:18,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 05:44:18,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:44:18,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732322688] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:18,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:18,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-03-08 05:44:18,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756836450] [2025-03-08 05:44:18,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:18,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 05:44:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:18,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 05:44:18,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:44:18,482 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:44:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:18,591 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-03-08 05:44:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:44:18,591 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2025-03-08 05:44:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:18,592 INFO L225 Difference]: With dead ends: 69 [2025-03-08 05:44:18,592 INFO L226 Difference]: Without dead ends: 38 [2025-03-08 05:44:18,592 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:44:18,593 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:18,593 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-08 05:44:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-08 05:44:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-08 05:44:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-03-08 05:44:18,598 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-03-08 05:44:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:18,598 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-03-08 05:44:18,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:44:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-03-08 05:44:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 05:44:18,599 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:18,600 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:18,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:18,801 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 [2025-03-08 05:44:18,801 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:18,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:18,802 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-03-08 05:44:18,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:18,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898185876] [2025-03-08 05:44:18,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:18,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:18,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:44:18,809 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:44:18,810 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:18,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 05:44:18,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898185876] [2025-03-08 05:44:18,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898185876] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677838696] [2025-03-08 05:44:18,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:18,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:18,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:18,894 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:18,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:44:18,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:44:18,924 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:44:18,924 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:18,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:18,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:44:18,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:44:18,994 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:44:19,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677838696] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:19,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:19,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-03-08 05:44:19,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645311107] [2025-03-08 05:44:19,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:19,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:44:19,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:19,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:44:19,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:44:19,268 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:44:19,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:19,605 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-03-08 05:44:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:44:19,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2025-03-08 05:44:19,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:19,607 INFO L225 Difference]: With dead ends: 101 [2025-03-08 05:44:19,607 INFO L226 Difference]: Without dead ends: 68 [2025-03-08 05:44:19,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:44:19,608 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:19,608 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:19,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-08 05:44:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-03-08 05:44:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2025-03-08 05:44:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-03-08 05:44:19,617 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-03-08 05:44:19,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:19,618 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-03-08 05:44:19,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:44:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-03-08 05:44:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-08 05:44:19,619 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:19,619 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:19,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:19,819 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 [2025-03-08 05:44:19,820 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:19,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:19,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-03-08 05:44:19,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:19,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430828584] [2025-03-08 05:44:19,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:19,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:19,826 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 05:44:19,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 05:44:19,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:19,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 05:44:19,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:19,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430828584] [2025-03-08 05:44:19,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430828584] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:19,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087649724] [2025-03-08 05:44:19,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:19,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:19,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:19,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:19,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:44:19,967 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 05:44:19,981 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 05:44:19,981 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:19,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:19,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:44:19,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-08 05:44:20,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 05:44:20,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087649724] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:20,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:20,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-03-08 05:44:20,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329905964] [2025-03-08 05:44:20,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:20,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:44:20,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:20,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:44:20,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:44:20,456 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-08 05:44:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:20,626 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-03-08 05:44:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:44:20,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2025-03-08 05:44:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:20,628 INFO L225 Difference]: With dead ends: 102 [2025-03-08 05:44:20,628 INFO L226 Difference]: Without dead ends: 98 [2025-03-08 05:44:20,629 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:44:20,629 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:20,629 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 161 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-08 05:44:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-03-08 05:44:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2025-03-08 05:44:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-03-08 05:44:20,651 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-03-08 05:44:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:20,651 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-03-08 05:44:20,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-08 05:44:20,653 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-03-08 05:44:20,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-08 05:44:20,659 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:20,659 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:20,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:20,859 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 [2025-03-08 05:44:20,860 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:20,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:20,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1757221303, now seen corresponding path program 1 times [2025-03-08 05:44:20,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:20,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364869478] [2025-03-08 05:44:20,860 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:20,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:20,865 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-08 05:44:20,874 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-08 05:44:20,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:20,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2025-03-08 05:44:21,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:21,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364869478] [2025-03-08 05:44:21,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364869478] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:21,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643909633] [2025-03-08 05:44:21,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:21,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:21,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:21,022 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:21,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:44:21,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-08 05:44:21,080 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-08 05:44:21,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:21,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:21,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:44:21,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-08 05:44:21,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-08 05:44:21,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643909633] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:21,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:21,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-03-08 05:44:21,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146671686] [2025-03-08 05:44:21,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:21,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:44:21,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:21,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:44:21,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:44:21,890 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-03-08 05:44:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:22,345 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-03-08 05:44:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 05:44:22,346 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 107 [2025-03-08 05:44:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:22,347 INFO L225 Difference]: With dead ends: 177 [2025-03-08 05:44:22,347 INFO L226 Difference]: Without dead ends: 104 [2025-03-08 05:44:22,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 05:44:22,349 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:22,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 352 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:44:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-08 05:44:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-03-08 05:44:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2025-03-08 05:44:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-03-08 05:44:22,359 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2025-03-08 05:44:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:22,359 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-03-08 05:44:22,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-03-08 05:44:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-03-08 05:44:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-08 05:44:22,361 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:22,361 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:22,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:22,565 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 [2025-03-08 05:44:22,565 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:22,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash 869810860, now seen corresponding path program 1 times [2025-03-08 05:44:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:22,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773909943] [2025-03-08 05:44:22,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:22,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:22,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 146 statements into 1 equivalence classes. [2025-03-08 05:44:22,580 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 146 of 146 statements. [2025-03-08 05:44:22,580 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:22,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 49 proven. 151 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2025-03-08 05:44:22,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:22,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773909943] [2025-03-08 05:44:22,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773909943] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:22,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534123221] [2025-03-08 05:44:22,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:22,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:22,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:22,718 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:22,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:44:22,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 146 statements into 1 equivalence classes. [2025-03-08 05:44:22,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 146 of 146 statements. [2025-03-08 05:44:22,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:22,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:22,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:44:22,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 36 proven. 205 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2025-03-08 05:44:22,879 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 36 proven. 221 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2025-03-08 05:44:23,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534123221] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:23,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:23,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-03-08 05:44:23,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909704619] [2025-03-08 05:44:23,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:23,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:44:23,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:23,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:44:23,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:44:23,752 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-08 05:44:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:23,946 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-03-08 05:44:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 05:44:23,947 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 146 [2025-03-08 05:44:23,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:23,948 INFO L225 Difference]: With dead ends: 132 [2025-03-08 05:44:23,948 INFO L226 Difference]: Without dead ends: 128 [2025-03-08 05:44:23,949 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-03-08 05:44:23,949 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:23,949 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 209 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-08 05:44:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-03-08 05:44:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2025-03-08 05:44:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-03-08 05:44:23,968 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 146 [2025-03-08 05:44:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:23,968 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-03-08 05:44:23,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-08 05:44:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-03-08 05:44:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2025-03-08 05:44:23,974 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:23,974 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 19, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:23,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:24,174 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 [2025-03-08 05:44:24,175 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:24,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:24,175 INFO L85 PathProgramCache]: Analyzing trace with hash 108794173, now seen corresponding path program 2 times [2025-03-08 05:44:24,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:24,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84235408] [2025-03-08 05:44:24,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:24,183 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 285 statements into 2 equivalence classes. [2025-03-08 05:44:24,208 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 285 of 285 statements. [2025-03-08 05:44:24,208 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:24,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 566 refuted. 0 times theorem prover too weak. 1591 trivial. 0 not checked. [2025-03-08 05:44:24,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:24,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84235408] [2025-03-08 05:44:24,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84235408] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:24,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756487891] [2025-03-08 05:44:24,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:24,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:24,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:24,475 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:24,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:44:24,529 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 285 statements into 2 equivalence classes. [2025-03-08 05:44:24,577 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 285 of 285 statements. [2025-03-08 05:44:24,577 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:24,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:24,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:44:24,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 566 refuted. 0 times theorem prover too weak. 1591 trivial. 0 not checked. [2025-03-08 05:44:24,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 590 refuted. 0 times theorem prover too weak. 1567 trivial. 0 not checked. [2025-03-08 05:44:25,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756487891] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:25,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:25,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 20 [2025-03-08 05:44:25,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528227992] [2025-03-08 05:44:25,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:25,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 05:44:25,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:25,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 05:44:25,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-03-08 05:44:25,977 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-03-08 05:44:26,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:26,151 INFO L93 Difference]: Finished difference Result 148 states and 283 transitions. [2025-03-08 05:44:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:44:26,152 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 285 [2025-03-08 05:44:26,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:26,154 INFO L225 Difference]: With dead ends: 148 [2025-03-08 05:44:26,155 INFO L226 Difference]: Without dead ends: 144 [2025-03-08 05:44:26,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 560 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2025-03-08 05:44:26,156 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:26,156 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 174 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-08 05:44:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2025-03-08 05:44:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 76 states have internal predecessors, (85), 20 states have call successors, (20), 8 states have call predecessors, (20), 18 states have return successors, (75), 28 states have call predecessors, (75), 20 states have call successors, (75) [2025-03-08 05:44:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2025-03-08 05:44:26,176 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 285 [2025-03-08 05:44:26,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:26,177 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2025-03-08 05:44:26,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-03-08 05:44:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2025-03-08 05:44:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2025-03-08 05:44:26,182 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:26,182 INFO L218 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 23, 21, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 10, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:26,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 05:44:26,386 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 [2025-03-08 05:44:26,386 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:26,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash -935726768, now seen corresponding path program 3 times [2025-03-08 05:44:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:26,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319853496] [2025-03-08 05:44:26,387 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:26,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:26,396 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 378 statements into 23 equivalence classes. [2025-03-08 05:44:26,414 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 120 of 378 statements. [2025-03-08 05:44:26,414 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-08 05:44:26,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 564 proven. 88 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2025-03-08 05:44:26,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:26,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319853496] [2025-03-08 05:44:26,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319853496] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:26,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500307518] [2025-03-08 05:44:26,531 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:26,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:26,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:26,533 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:26,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:44:26,616 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 378 statements into 23 equivalence classes. [2025-03-08 05:44:26,638 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 120 of 378 statements. [2025-03-08 05:44:26,639 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-08 05:44:26,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:26,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:44:26,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 575 proven. 91 refuted. 0 times theorem prover too weak. 3389 trivial. 0 not checked. [2025-03-08 05:44:26,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 579 proven. 97 refuted. 0 times theorem prover too weak. 3379 trivial. 0 not checked. [2025-03-08 05:44:27,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500307518] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:27,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:27,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2025-03-08 05:44:27,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359672745] [2025-03-08 05:44:27,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:27,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:44:27,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:27,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:44:27,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:44:27,739 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2025-03-08 05:44:27,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:27,884 INFO L93 Difference]: Finished difference Result 159 states and 292 transitions. [2025-03-08 05:44:27,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:44:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 378 [2025-03-08 05:44:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:27,886 INFO L225 Difference]: With dead ends: 159 [2025-03-08 05:44:27,886 INFO L226 Difference]: Without dead ends: 155 [2025-03-08 05:44:27,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 746 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:44:27,887 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:27,887 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 177 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-03-08 05:44:27,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2025-03-08 05:44:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 92 states have (on average 1.1630434782608696) internal successors, (107), 94 states have internal predecessors, (107), 26 states have call successors, (26), 10 states have call predecessors, (26), 22 states have return successors, (116), 36 states have call predecessors, (116), 26 states have call successors, (116) [2025-03-08 05:44:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 249 transitions. [2025-03-08 05:44:27,898 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 249 transitions. Word has length 378 [2025-03-08 05:44:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:27,899 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 249 transitions. [2025-03-08 05:44:27,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2025-03-08 05:44:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 249 transitions. [2025-03-08 05:44:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2025-03-08 05:44:27,902 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:27,902 INFO L218 NwaCegarLoop]: trace histogram [54, 54, 45, 45, 42, 39, 27, 27, 27, 27, 27, 27, 27, 22, 22, 22, 22, 22, 22, 22, 20, 12, 12, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:27,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:28,103 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 [2025-03-08 05:44:28,103 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:28,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash -353738821, now seen corresponding path program 4 times [2025-03-08 05:44:28,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:28,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244379488] [2025-03-08 05:44:28,104 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:44:28,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:28,117 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 679 statements into 2 equivalence classes. [2025-03-08 05:44:28,159 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 577 of 679 statements. [2025-03-08 05:44:28,159 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:44:28,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 278 proven. 1247 refuted. 0 times theorem prover too weak. 12089 trivial. 0 not checked. [2025-03-08 05:44:28,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:28,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244379488] [2025-03-08 05:44:28,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244379488] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:28,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177595509] [2025-03-08 05:44:28,456 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:44:28,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:28,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:28,458 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:28,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:44:28,552 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 679 statements into 2 equivalence classes. [2025-03-08 05:44:28,636 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 577 of 679 statements. [2025-03-08 05:44:28,636 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:44:28,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:28,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:44:28,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 2271 proven. 19 refuted. 0 times theorem prover too weak. 11324 trivial. 0 not checked. [2025-03-08 05:44:28,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 278 proven. 1435 refuted. 0 times theorem prover too weak. 11901 trivial. 0 not checked. [2025-03-08 05:44:30,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177595509] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:30,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:30,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2025-03-08 05:44:30,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757787119] [2025-03-08 05:44:30,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:30,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:44:30,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:30,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:44:30,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:44:30,267 INFO L87 Difference]: Start difference. First operand 141 states and 249 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-03-08 05:44:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:30,418 INFO L93 Difference]: Finished difference Result 271 states and 534 transitions. [2025-03-08 05:44:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:44:30,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) Word has length 679 [2025-03-08 05:44:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:30,421 INFO L225 Difference]: With dead ends: 271 [2025-03-08 05:44:30,421 INFO L226 Difference]: Without dead ends: 138 [2025-03-08 05:44:30,423 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1373 GetRequests, 1347 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:44:30,423 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:30,423 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 228 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-03-08 05:44:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2025-03-08 05:44:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.120879120879121) internal successors, (102), 92 states have internal predecessors, (102), 25 states have call successors, (25), 11 states have call predecessors, (25), 21 states have return successors, (100), 34 states have call predecessors, (100), 25 states have call successors, (100) [2025-03-08 05:44:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 227 transitions. [2025-03-08 05:44:30,439 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 227 transitions. Word has length 679 [2025-03-08 05:44:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:30,440 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 227 transitions. [2025-03-08 05:44:30,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-03-08 05:44:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 227 transitions. [2025-03-08 05:44:30,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2025-03-08 05:44:30,443 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:30,443 INFO L218 NwaCegarLoop]: trace histogram [37, 37, 34, 34, 31, 26, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 14, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:30,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:30,644 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 [2025-03-08 05:44:30,644 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:30,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash 727265831, now seen corresponding path program 5 times [2025-03-08 05:44:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894003717] [2025-03-08 05:44:30,645 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:44:30,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:30,655 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 487 statements into 33 equivalence classes. [2025-03-08 05:44:30,688 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 259 of 487 statements. [2025-03-08 05:44:30,688 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-03-08 05:44:30,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6854 backedges. 333 proven. 1125 refuted. 0 times theorem prover too weak. 5396 trivial. 0 not checked. [2025-03-08 05:44:30,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:30,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894003717] [2025-03-08 05:44:30,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894003717] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:30,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693535955] [2025-03-08 05:44:30,933 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:44:30,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:30,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:30,935 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:30,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:44:31,026 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 487 statements into 33 equivalence classes. [2025-03-08 05:44:31,072 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 259 of 487 statements. [2025-03-08 05:44:31,072 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-03-08 05:44:31,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:31,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:44:31,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6854 backedges. 2996 proven. 111 refuted. 0 times theorem prover too weak. 3747 trivial. 0 not checked. [2025-03-08 05:44:31,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6854 backedges. 331 proven. 1105 refuted. 0 times theorem prover too weak. 5418 trivial. 0 not checked. [2025-03-08 05:44:32,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693535955] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:32,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:32,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 15] total 24 [2025-03-08 05:44:32,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316064031] [2025-03-08 05:44:32,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:32,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 05:44:32,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:32,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 05:44:32,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:44:32,603 INFO L87 Difference]: Start difference. First operand 138 states and 227 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 15 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) [2025-03-08 05:44:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:32,912 INFO L93 Difference]: Finished difference Result 286 states and 597 transitions. [2025-03-08 05:44:32,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 05:44:32,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 15 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) Word has length 487 [2025-03-08 05:44:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:32,915 INFO L225 Difference]: With dead ends: 286 [2025-03-08 05:44:32,916 INFO L226 Difference]: Without dead ends: 132 [2025-03-08 05:44:32,918 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 960 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 05:44:32,918 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 58 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:32,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 280 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-03-08 05:44:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2025-03-08 05:44:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 82 states have internal predecessors, (93), 22 states have call successors, (22), 13 states have call predecessors, (22), 17 states have return successors, (80), 28 states have call predecessors, (80), 22 states have call successors, (80) [2025-03-08 05:44:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 195 transitions. [2025-03-08 05:44:32,928 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 195 transitions. Word has length 487 [2025-03-08 05:44:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:32,929 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 195 transitions. [2025-03-08 05:44:32,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 15 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) [2025-03-08 05:44:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 195 transitions. [2025-03-08 05:44:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2025-03-08 05:44:32,933 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:32,933 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 53, 53, 47, 46, 31, 31, 31, 31, 31, 31, 31, 26, 26, 26, 26, 26, 26, 26, 20, 16, 16, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:32,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:33,137 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 [2025-03-08 05:44:33,137 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:33,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:33,138 INFO L85 PathProgramCache]: Analyzing trace with hash 127438983, now seen corresponding path program 6 times [2025-03-08 05:44:33,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:33,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539151872] [2025-03-08 05:44:33,138 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:44:33,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:33,154 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 787 statements into 53 equivalence classes. [2025-03-08 05:44:33,186 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 269 of 787 statements. [2025-03-08 05:44:33,186 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-08 05:44:33,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18352 backedges. 540 proven. 1808 refuted. 0 times theorem prover too weak. 16004 trivial. 0 not checked. [2025-03-08 05:44:33,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:33,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539151872] [2025-03-08 05:44:33,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539151872] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:33,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511165040] [2025-03-08 05:44:33,398 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:44:33,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:33,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:33,403 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:33,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:44:33,509 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 787 statements into 53 equivalence classes. [2025-03-08 05:44:33,563 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 269 of 787 statements. [2025-03-08 05:44:33,563 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-08 05:44:33,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:33,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:44:33,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18352 backedges. 6364 proven. 61 refuted. 0 times theorem prover too weak. 11927 trivial. 0 not checked. [2025-03-08 05:44:33,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18352 backedges. 567 proven. 1993 refuted. 0 times theorem prover too weak. 15792 trivial. 0 not checked. [2025-03-08 05:44:35,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511165040] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:35,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:35,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 23 [2025-03-08 05:44:35,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472281871] [2025-03-08 05:44:35,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:35,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:44:35,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:35,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:44:35,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:44:35,576 INFO L87 Difference]: Start difference. First operand 124 states and 195 transitions. Second operand has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 23 states have internal predecessors, (91), 16 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (30), 8 states have call predecessors, (30), 16 states have call successors, (30) [2025-03-08 05:44:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:35,889 INFO L93 Difference]: Finished difference Result 261 states and 473 transitions. [2025-03-08 05:44:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 05:44:35,890 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 23 states have internal predecessors, (91), 16 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (30), 8 states have call predecessors, (30), 16 states have call successors, (30) Word has length 787 [2025-03-08 05:44:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:35,891 INFO L225 Difference]: With dead ends: 261 [2025-03-08 05:44:35,892 INFO L226 Difference]: Without dead ends: 143 [2025-03-08 05:44:35,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1602 GetRequests, 1559 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 05:44:35,893 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:35,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 254 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-03-08 05:44:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2025-03-08 05:44:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 90 states have internal predecessors, (106), 24 states have call successors, (24), 17 states have call predecessors, (24), 17 states have return successors, (80), 29 states have call predecessors, (80), 24 states have call successors, (80) [2025-03-08 05:44:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 210 transitions. [2025-03-08 05:44:35,904 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 210 transitions. Word has length 787 [2025-03-08 05:44:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:35,904 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 210 transitions. [2025-03-08 05:44:35,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 23 states have internal predecessors, (91), 16 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (30), 8 states have call predecessors, (30), 16 states have call successors, (30) [2025-03-08 05:44:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 210 transitions. [2025-03-08 05:44:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2025-03-08 05:44:35,906 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:35,907 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 31, 28, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 12, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:35,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 05:44:36,111 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 [2025-03-08 05:44:36,111 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:36,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1724189175, now seen corresponding path program 7 times [2025-03-08 05:44:36,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:36,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205027809] [2025-03-08 05:44:36,113 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:44:36,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:36,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 513 statements into 1 equivalence classes. [2025-03-08 05:44:36,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 513 of 513 statements. [2025-03-08 05:44:36,151 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:36,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7615 backedges. 236 proven. 888 refuted. 0 times theorem prover too weak. 6491 trivial. 0 not checked. [2025-03-08 05:44:36,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:36,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205027809] [2025-03-08 05:44:36,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205027809] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:36,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835242436] [2025-03-08 05:44:36,477 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:44:36,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:36,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:36,479 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:36,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:44:36,594 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 513 statements into 1 equivalence classes. [2025-03-08 05:44:36,666 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 513 of 513 statements. [2025-03-08 05:44:36,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:36,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:36,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:44:36,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7615 backedges. 182 proven. 1297 refuted. 0 times theorem prover too weak. 6136 trivial. 0 not checked. [2025-03-08 05:44:36,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7615 backedges. 182 proven. 1330 refuted. 0 times theorem prover too weak. 6103 trivial. 0 not checked. [2025-03-08 05:44:38,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835242436] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:38,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:38,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 19] total 26 [2025-03-08 05:44:38,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203586746] [2025-03-08 05:44:38,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:38,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 05:44:38,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:38,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 05:44:38,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2025-03-08 05:44:38,839 INFO L87 Difference]: Start difference. First operand 137 states and 210 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2025-03-08 05:44:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:39,088 INFO L93 Difference]: Finished difference Result 195 states and 399 transitions. [2025-03-08 05:44:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 05:44:39,089 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) Word has length 513 [2025-03-08 05:44:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:39,091 INFO L225 Difference]: With dead ends: 195 [2025-03-08 05:44:39,091 INFO L226 Difference]: Without dead ends: 191 [2025-03-08 05:44:39,093 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 1007 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 05:44:39,093 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:39,093 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 214 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2025-03-08 05:44:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 163. [2025-03-08 05:44:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 111 states have (on average 1.0990990990990992) internal successors, (122), 106 states have internal predecessors, (122), 28 states have call successors, (28), 17 states have call predecessors, (28), 23 states have return successors, (134), 39 states have call predecessors, (134), 28 states have call successors, (134) [2025-03-08 05:44:39,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 284 transitions. [2025-03-08 05:44:39,108 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 284 transitions. Word has length 513 [2025-03-08 05:44:39,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:39,108 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 284 transitions. [2025-03-08 05:44:39,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2025-03-08 05:44:39,108 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 284 transitions. [2025-03-08 05:44:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2025-03-08 05:44:39,116 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:39,116 INFO L218 NwaCegarLoop]: trace histogram [85, 85, 82, 82, 68, 67, 42, 42, 42, 42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 26, 26, 18, 14, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:39,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:39,316 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 [2025-03-08 05:44:39,316 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:39,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1844293001, now seen corresponding path program 8 times [2025-03-08 05:44:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:39,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948643759] [2025-03-08 05:44:39,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:39,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:39,348 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1141 statements into 2 equivalence classes. [2025-03-08 05:44:39,430 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1141 of 1141 statements. [2025-03-08 05:44:39,430 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:39,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 38777 backedges. 467 proven. 2623 refuted. 0 times theorem prover too weak. 35687 trivial. 0 not checked. [2025-03-08 05:44:40,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:40,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948643759] [2025-03-08 05:44:40,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948643759] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:40,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181724317] [2025-03-08 05:44:40,163 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:40,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:40,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:40,166 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:40,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:44:40,330 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1141 statements into 2 equivalence classes. [2025-03-08 05:44:40,497 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1141 of 1141 statements. [2025-03-08 05:44:40,498 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:40,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:40,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 05:44:40,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38777 backedges. 408 proven. 3562 refuted. 0 times theorem prover too weak. 34807 trivial. 0 not checked. [2025-03-08 05:44:40,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 38777 backedges. 408 proven. 3606 refuted. 0 times theorem prover too weak. 34763 trivial. 0 not checked. [2025-03-08 05:44:44,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181724317] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:44,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:44,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 29 [2025-03-08 05:44:44,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044264247] [2025-03-08 05:44:44,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:44,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 05:44:44,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:44,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 05:44:44,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2025-03-08 05:44:44,426 INFO L87 Difference]: Start difference. First operand 163 states and 284 transitions. Second operand has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 29 states have internal predecessors, (96), 25 states have call successors, (29), 1 states have call predecessors, (29), 15 states have return successors, (41), 16 states have call predecessors, (41), 25 states have call successors, (41) [2025-03-08 05:44:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:44,730 INFO L93 Difference]: Finished difference Result 232 states and 556 transitions. [2025-03-08 05:44:44,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 05:44:44,730 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 29 states have internal predecessors, (96), 25 states have call successors, (29), 1 states have call predecessors, (29), 15 states have return successors, (41), 16 states have call predecessors, (41), 25 states have call successors, (41) Word has length 1141 [2025-03-08 05:44:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:44,734 INFO L225 Difference]: With dead ends: 232 [2025-03-08 05:44:44,734 INFO L226 Difference]: Without dead ends: 228 [2025-03-08 05:44:44,735 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2310 GetRequests, 2261 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2025-03-08 05:44:44,735 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 124 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:44,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 271 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-03-08 05:44:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 153. [2025-03-08 05:44:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 105 states have (on average 1.1047619047619048) internal successors, (116), 100 states have internal predecessors, (116), 26 states have call successors, (26), 17 states have call predecessors, (26), 21 states have return successors, (114), 35 states have call predecessors, (114), 26 states have call successors, (114) [2025-03-08 05:44:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 256 transitions. [2025-03-08 05:44:44,751 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 256 transitions. Word has length 1141 [2025-03-08 05:44:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:44,751 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 256 transitions. [2025-03-08 05:44:44,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 29 states have internal predecessors, (96), 25 states have call successors, (29), 1 states have call predecessors, (29), 15 states have return successors, (41), 16 states have call predecessors, (41), 25 states have call successors, (41) [2025-03-08 05:44:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 256 transitions. [2025-03-08 05:44:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1659 [2025-03-08 05:44:44,762 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:44,763 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 117, 117, 99, 97, 63, 63, 63, 63, 63, 63, 63, 58, 58, 58, 58, 58, 58, 58, 39, 36, 29, 18, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:44,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:44,963 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 [2025-03-08 05:44:44,964 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:44,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash -236708604, now seen corresponding path program 9 times [2025-03-08 05:44:44,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:44,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476995882] [2025-03-08 05:44:44,964 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:44,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:44,994 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1658 statements into 105 equivalence classes. [2025-03-08 05:44:45,026 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 237 of 1658 statements. [2025-03-08 05:44:45,027 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-08 05:44:45,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 82575 backedges. 4121 proven. 80 refuted. 0 times theorem prover too weak. 78374 trivial. 0 not checked. [2025-03-08 05:44:45,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:45,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476995882] [2025-03-08 05:44:45,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476995882] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:45,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124928426] [2025-03-08 05:44:45,169 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:45,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:45,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:45,171 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:45,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 05:44:45,381 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1658 statements into 105 equivalence classes. [2025-03-08 05:44:45,427 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 237 of 1658 statements. [2025-03-08 05:44:45,427 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-08 05:44:45,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:45,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:44:45,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 82575 backedges. 4537 proven. 93 refuted. 0 times theorem prover too weak. 77945 trivial. 0 not checked. [2025-03-08 05:44:45,543 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 82575 backedges. 4537 proven. 98 refuted. 0 times theorem prover too weak. 77940 trivial. 0 not checked. [2025-03-08 05:44:49,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124928426] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:49,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:49,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 26 [2025-03-08 05:44:49,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411210482] [2025-03-08 05:44:49,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:49,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 05:44:49,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:49,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 05:44:49,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2025-03-08 05:44:49,053 INFO L87 Difference]: Start difference. First operand 153 states and 256 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 12 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (30), 18 states have call predecessors, (30), 12 states have call successors, (30) [2025-03-08 05:44:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:49,336 INFO L93 Difference]: Finished difference Result 331 states and 669 transitions. [2025-03-08 05:44:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 05:44:49,336 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 12 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (30), 18 states have call predecessors, (30), 12 states have call successors, (30) Word has length 1658 [2025-03-08 05:44:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:49,338 INFO L225 Difference]: With dead ends: 331 [2025-03-08 05:44:49,339 INFO L226 Difference]: Without dead ends: 183 [2025-03-08 05:44:49,340 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3340 GetRequests, 3297 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 05:44:49,340 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 55 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:49,341 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 407 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2025-03-08 05:44:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2025-03-08 05:44:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 112 states have internal predecessors, (120), 32 states have call successors, (32), 18 states have call predecessors, (32), 21 states have return successors, (121), 38 states have call predecessors, (121), 32 states have call successors, (121) [2025-03-08 05:44:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 273 transitions. [2025-03-08 05:44:49,352 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 273 transitions. Word has length 1658 [2025-03-08 05:44:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:49,352 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 273 transitions. [2025-03-08 05:44:49,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 12 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (30), 18 states have call predecessors, (30), 12 states have call successors, (30) [2025-03-08 05:44:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 273 transitions. [2025-03-08 05:44:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2992 [2025-03-08 05:44:49,385 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:49,386 INFO L218 NwaCegarLoop]: trace histogram [233, 233, 206, 206, 179, 174, 116, 116, 116, 116, 116, 116, 116, 103, 103, 103, 103, 103, 103, 103, 71, 63, 59, 27, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:49,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:49,586 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 [2025-03-08 05:44:49,586 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:49,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:49,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1594985372, now seen corresponding path program 10 times [2025-03-08 05:44:49,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:49,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273115590] [2025-03-08 05:44:49,587 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:44:49,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:49,626 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2991 statements into 2 equivalence classes. [2025-03-08 05:44:49,976 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2549 of 2991 statements. [2025-03-08 05:44:49,976 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:44:49,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 271246 backedges. 1703 proven. 11530 refuted. 0 times theorem prover too weak. 258013 trivial. 0 not checked. [2025-03-08 05:44:53,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:53,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273115590] [2025-03-08 05:44:53,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273115590] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:53,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094890193] [2025-03-08 05:44:53,775 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:44:53,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:53,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:53,776 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:53,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 05:44:54,055 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2991 statements into 2 equivalence classes. [2025-03-08 05:44:54,417 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2549 of 2991 statements. [2025-03-08 05:44:54,417 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:44:54,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:54,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 5320 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:44:54,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 271246 backedges. 42066 proven. 502 refuted. 0 times theorem prover too weak. 228678 trivial. 0 not checked. [2025-03-08 05:44:54,585 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 271246 backedges. 1756 proven. 13932 refuted. 0 times theorem prover too weak. 255558 trivial. 0 not checked. [2025-03-08 05:45:02,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094890193] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:02,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:02,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 23] total 31 [2025-03-08 05:45:02,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305420657] [2025-03-08 05:45:02,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:02,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-08 05:45:02,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:02,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-08 05:45:02,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2025-03-08 05:45:02,704 INFO L87 Difference]: Start difference. First operand 169 states and 273 transitions. Second operand has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 25 states have call successors, (37), 2 states have call predecessors, (37), 13 states have return successors, (45), 15 states have call predecessors, (45), 25 states have call successors, (45) [2025-03-08 05:45:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:03,243 INFO L93 Difference]: Finished difference Result 376 states and 724 transitions. [2025-03-08 05:45:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-08 05:45:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 25 states have call successors, (37), 2 states have call predecessors, (37), 13 states have return successors, (45), 15 states have call predecessors, (45), 25 states have call successors, (45) Word has length 2991 [2025-03-08 05:45:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:03,246 INFO L225 Difference]: With dead ends: 376 [2025-03-08 05:45:03,246 INFO L226 Difference]: Without dead ends: 210 [2025-03-08 05:45:03,248 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6028 GetRequests, 5961 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=533, Invalid=2773, Unknown=0, NotChecked=0, Total=3306 [2025-03-08 05:45:03,248 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 130 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:03,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 368 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:45:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2025-03-08 05:45:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 184. [2025-03-08 05:45:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 125 states have (on average 1.04) internal successors, (130), 123 states have internal predecessors, (130), 35 states have call successors, (35), 20 states have call predecessors, (35), 23 states have return successors, (139), 40 states have call predecessors, (139), 35 states have call successors, (139) [2025-03-08 05:45:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 304 transitions. [2025-03-08 05:45:03,262 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 304 transitions. Word has length 2991 [2025-03-08 05:45:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:03,263 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 304 transitions. [2025-03-08 05:45:03,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.774193548387097) internal successors, (117), 31 states have internal predecessors, (117), 25 states have call successors, (37), 2 states have call predecessors, (37), 13 states have return successors, (45), 15 states have call predecessors, (45), 25 states have call successors, (45) [2025-03-08 05:45:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 304 transitions. [2025-03-08 05:45:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2516 [2025-03-08 05:45:03,288 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:03,288 INFO L218 NwaCegarLoop]: trace histogram [195, 195, 174, 174, 149, 148, 97, 97, 97, 97, 97, 97, 97, 87, 87, 87, 87, 87, 87, 87, 62, 51, 46, 26, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:03,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:03,489 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 [2025-03-08 05:45:03,489 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:03,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash -636101689, now seen corresponding path program 11 times [2025-03-08 05:45:03,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:03,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630473003] [2025-03-08 05:45:03,490 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:03,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:03,525 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 2515 statements into 161 equivalence classes. [2025-03-08 05:45:03,534 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 128 of 2515 statements. [2025-03-08 05:45:03,534 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-08 05:45:03,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 191356 backedges. 1797 proven. 7133 refuted. 0 times theorem prover too weak. 182426 trivial. 0 not checked. [2025-03-08 05:45:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630473003] [2025-03-08 05:45:03,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630473003] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422730673] [2025-03-08 05:45:03,669 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:03,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:03,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:03,671 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) [2025-03-08 05:45:03,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 05:45:03,982 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 2515 statements into 161 equivalence classes. [2025-03-08 05:45:04,001 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 128 of 2515 statements. [2025-03-08 05:45:04,001 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-08 05:45:04,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:04,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:45:04,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 191356 backedges. 38305 proven. 65 refuted. 0 times theorem prover too weak. 152986 trivial. 0 not checked. [2025-03-08 05:45:04,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 191356 backedges. 1852 proven. 7793 refuted. 0 times theorem prover too weak. 181711 trivial. 0 not checked. [2025-03-08 05:45:09,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422730673] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:09,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:09,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 22 [2025-03-08 05:45:09,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846718475] [2025-03-08 05:45:09,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:09,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 05:45:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:09,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 05:45:09,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:45:09,870 INFO L87 Difference]: Start difference. First operand 184 states and 304 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 14 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (31), 10 states have call predecessors, (31), 14 states have call successors, (31) [2025-03-08 05:45:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:10,060 INFO L93 Difference]: Finished difference Result 354 states and 661 transitions. [2025-03-08 05:45:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:45:10,060 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 14 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (31), 10 states have call predecessors, (31), 14 states have call successors, (31) Word has length 2515 [2025-03-08 05:45:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:10,062 INFO L225 Difference]: With dead ends: 354 [2025-03-08 05:45:10,062 INFO L226 Difference]: Without dead ends: 177 [2025-03-08 05:45:10,063 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5052 GetRequests, 5016 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2025-03-08 05:45:10,064 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 33 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:10,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 311 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2025-03-08 05:45:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2025-03-08 05:45:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 117 states have internal predecessors, (124), 33 states have call successors, (33), 19 states have call predecessors, (33), 22 states have return successors, (126), 38 states have call predecessors, (126), 33 states have call successors, (126) [2025-03-08 05:45:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 283 transitions. [2025-03-08 05:45:10,076 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 283 transitions. Word has length 2515 [2025-03-08 05:45:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:10,076 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 283 transitions. [2025-03-08 05:45:10,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 14 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (31), 10 states have call predecessors, (31), 14 states have call successors, (31) [2025-03-08 05:45:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 283 transitions. [2025-03-08 05:45:10,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2641 [2025-03-08 05:45:10,101 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:10,102 INFO L218 NwaCegarLoop]: trace histogram [200, 200, 187, 187, 163, 151, 100, 100, 100, 100, 100, 100, 100, 93, 93, 93, 93, 93, 93, 93, 70, 51, 37, 36, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:10,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:10,302 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 [2025-03-08 05:45:10,303 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:10,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:10,303 INFO L85 PathProgramCache]: Analyzing trace with hash 832096664, now seen corresponding path program 12 times [2025-03-08 05:45:10,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:10,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418116139] [2025-03-08 05:45:10,303 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:10,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:10,337 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 2640 statements into 157 equivalence classes. [2025-03-08 05:45:10,368 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) and asserted 317 of 2640 statements. [2025-03-08 05:45:10,368 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2025-03-08 05:45:10,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 210604 backedges. 2035 proven. 9008 refuted. 0 times theorem prover too weak. 199561 trivial. 0 not checked. [2025-03-08 05:45:10,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:10,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418116139] [2025-03-08 05:45:10,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418116139] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:10,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583752230] [2025-03-08 05:45:10,607 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:10,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:10,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:10,609 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) [2025-03-08 05:45:10,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 05:45:10,938 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 2640 statements into 157 equivalence classes. [2025-03-08 05:45:10,996 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) and asserted 317 of 2640 statements. [2025-03-08 05:45:10,996 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2025-03-08 05:45:10,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:10,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:45:11,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 210604 backedges. 46880 proven. 176 refuted. 0 times theorem prover too weak. 163548 trivial. 0 not checked. [2025-03-08 05:45:11,086 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 210604 backedges. 2077 proven. 9655 refuted. 0 times theorem prover too weak. 198872 trivial. 0 not checked. [2025-03-08 05:45:17,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583752230] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:17,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:17,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 19] total 27 [2025-03-08 05:45:17,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284003314] [2025-03-08 05:45:17,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:17,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 05:45:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:17,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 05:45:17,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:45:17,774 INFO L87 Difference]: Start difference. First operand 175 states and 283 transitions. Second operand has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 21 states have call successors, (31), 2 states have call predecessors, (31), 10 states have return successors, (37), 10 states have call predecessors, (37), 21 states have call successors, (37) [2025-03-08 05:45:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:18,051 INFO L93 Difference]: Finished difference Result 339 states and 593 transitions. [2025-03-08 05:45:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 05:45:18,051 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 21 states have call successors, (31), 2 states have call predecessors, (31), 10 states have return successors, (37), 10 states have call predecessors, (37), 21 states have call successors, (37) Word has length 2640 [2025-03-08 05:45:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:18,053 INFO L225 Difference]: With dead ends: 339 [2025-03-08 05:45:18,053 INFO L226 Difference]: Without dead ends: 171 [2025-03-08 05:45:18,055 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5312 GetRequests, 5263 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2025-03-08 05:45:18,055 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 58 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:18,056 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 330 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:45:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-03-08 05:45:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 155. [2025-03-08 05:45:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 104 states have internal predecessors, (111), 28 states have call successors, (28), 17 states have call predecessors, (28), 20 states have return successors, (87), 33 states have call predecessors, (87), 28 states have call successors, (87) [2025-03-08 05:45:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2025-03-08 05:45:18,067 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 2640 [2025-03-08 05:45:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:18,067 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2025-03-08 05:45:18,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 21 states have call successors, (31), 2 states have call predecessors, (31), 10 states have return successors, (37), 10 states have call predecessors, (37), 21 states have call successors, (37) [2025-03-08 05:45:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2025-03-08 05:45:18,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1877 [2025-03-08 05:45:18,081 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:18,082 INFO L218 NwaCegarLoop]: trace histogram [140, 140, 135, 135, 112, 110, 70, 70, 70, 70, 70, 70, 70, 67, 67, 67, 67, 67, 67, 67, 43, 42, 30, 23, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:18,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:18,282 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 [2025-03-08 05:45:18,283 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:18,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:18,283 INFO L85 PathProgramCache]: Analyzing trace with hash 318404459, now seen corresponding path program 13 times [2025-03-08 05:45:18,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:18,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131032153] [2025-03-08 05:45:18,284 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:18,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:18,311 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1876 statements into 1 equivalence classes. [2025-03-08 05:45:18,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1876 of 1876 statements. [2025-03-08 05:45:18,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:18,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 105815 backedges. 1055 proven. 6376 refuted. 0 times theorem prover too weak. 98384 trivial. 0 not checked. [2025-03-08 05:45:20,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:20,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131032153] [2025-03-08 05:45:20,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131032153] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:20,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319017434] [2025-03-08 05:45:20,682 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:20,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:20,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:20,684 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) [2025-03-08 05:45:20,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 05:45:20,957 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1876 statements into 1 equivalence classes. [2025-03-08 05:45:21,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1876 of 1876 statements. [2025-03-08 05:45:21,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:21,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:21,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 4185 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:45:21,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 105815 backedges. 1055 proven. 6376 refuted. 0 times theorem prover too weak. 98384 trivial. 0 not checked. [2025-03-08 05:45:21,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 105815 backedges. 1055 proven. 6432 refuted. 0 times theorem prover too weak. 98328 trivial. 0 not checked. [2025-03-08 05:45:27,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319017434] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:27,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:27,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 26 [2025-03-08 05:45:27,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527329932] [2025-03-08 05:45:27,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:27,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 05:45:27,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:27,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 05:45:27,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2025-03-08 05:45:27,076 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2025-03-08 05:45:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:27,294 INFO L93 Difference]: Finished difference Result 180 states and 298 transitions. [2025-03-08 05:45:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:45:27,294 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) Word has length 1876 [2025-03-08 05:45:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:27,297 INFO L225 Difference]: With dead ends: 180 [2025-03-08 05:45:27,297 INFO L226 Difference]: Without dead ends: 176 [2025-03-08 05:45:27,298 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3782 GetRequests, 3739 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 05:45:27,299 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:27,299 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 255 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2025-03-08 05:45:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 153. [2025-03-08 05:45:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 103 states have internal predecessors, (110), 27 states have call successors, (27), 17 states have call predecessors, (27), 20 states have return successors, (81), 32 states have call predecessors, (81), 27 states have call successors, (81) [2025-03-08 05:45:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 218 transitions. [2025-03-08 05:45:27,311 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 218 transitions. Word has length 1876 [2025-03-08 05:45:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:27,311 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 218 transitions. [2025-03-08 05:45:27,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2025-03-08 05:45:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 218 transitions. [2025-03-08 05:45:27,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1809 [2025-03-08 05:45:27,325 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:27,325 INFO L218 NwaCegarLoop]: trace histogram [136, 136, 129, 129, 108, 106, 68, 68, 68, 68, 68, 68, 68, 64, 64, 64, 64, 64, 64, 64, 42, 40, 30, 21, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:27,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-08 05:45:27,551 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 [2025-03-08 05:45:27,551 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:27,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:27,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1607227791, now seen corresponding path program 14 times [2025-03-08 05:45:27,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:27,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680336654] [2025-03-08 05:45:27,555 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:27,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:27,585 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1808 statements into 2 equivalence classes. [2025-03-08 05:45:27,734 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1808 of 1808 statements. [2025-03-08 05:45:27,734 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:27,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 98263 backedges. 1529 proven. 4890 refuted. 0 times theorem prover too weak. 91844 trivial. 0 not checked. [2025-03-08 05:45:29,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:29,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680336654] [2025-03-08 05:45:29,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680336654] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:29,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486003750] [2025-03-08 05:45:29,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:29,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:29,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:29,691 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) [2025-03-08 05:45:29,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 05:45:29,998 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1808 statements into 2 equivalence classes. [2025-03-08 05:45:30,234 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1808 of 1808 statements. [2025-03-08 05:45:30,235 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:30,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:30,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 4034 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 05:45:30,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 98263 backedges. 906 proven. 6940 refuted. 0 times theorem prover too weak. 90417 trivial. 0 not checked. [2025-03-08 05:45:30,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 98263 backedges. 906 proven. 7010 refuted. 0 times theorem prover too weak. 90347 trivial. 0 not checked. [2025-03-08 05:45:36,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486003750] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:36,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:36,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 25] total 32 [2025-03-08 05:45:36,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33332720] [2025-03-08 05:45:36,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:36,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-08 05:45:36,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:36,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-08 05:45:36,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2025-03-08 05:45:36,801 INFO L87 Difference]: Start difference. First operand 153 states and 218 transitions. Second operand has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) [2025-03-08 05:45:37,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:37,117 INFO L93 Difference]: Finished difference Result 220 states and 482 transitions. [2025-03-08 05:45:37,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 05:45:37,118 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) Word has length 1808 [2025-03-08 05:45:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:37,122 INFO L225 Difference]: With dead ends: 220 [2025-03-08 05:45:37,122 INFO L226 Difference]: Without dead ends: 216 [2025-03-08 05:45:37,123 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3649 GetRequests, 3594 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2025-03-08 05:45:37,124 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:37,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 285 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:45:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2025-03-08 05:45:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2025-03-08 05:45:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 113 states have internal predecessors, (120), 31 states have call successors, (31), 17 states have call predecessors, (31), 23 states have return successors, (124), 39 states have call predecessors, (124), 31 states have call successors, (124) [2025-03-08 05:45:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 275 transitions. [2025-03-08 05:45:37,141 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 275 transitions. Word has length 1808 [2025-03-08 05:45:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:37,141 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 275 transitions. [2025-03-08 05:45:37,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 17 states have call predecessors, (45), 28 states have call successors, (45) [2025-03-08 05:45:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 275 transitions. [2025-03-08 05:45:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6550 [2025-03-08 05:45:37,359 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:37,360 INFO L218 NwaCegarLoop]: trace histogram [502, 502, 459, 459, 398, 381, 251, 251, 251, 251, 251, 251, 251, 229, 229, 229, 229, 229, 229, 229, 169, 130, 104, 78, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:37,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-08 05:45:37,560 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 [2025-03-08 05:45:37,560 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:37,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:37,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1520531201, now seen corresponding path program 15 times [2025-03-08 05:45:37,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:37,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331781842] [2025-03-08 05:45:37,563 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:37,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:37,650 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 6549 statements into 407 equivalence classes. [2025-03-08 05:45:37,664 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 236 of 6549 statements. [2025-03-08 05:45:37,664 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-08 05:45:37,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1304765 backedges. 22086 proven. 195 refuted. 0 times theorem prover too weak. 1282484 trivial. 0 not checked. [2025-03-08 05:45:37,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:37,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331781842] [2025-03-08 05:45:37,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331781842] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:37,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083483984] [2025-03-08 05:45:37,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:37,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:37,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:37,864 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) [2025-03-08 05:45:37,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 05:45:38,500 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 6549 statements into 407 equivalence classes. [2025-03-08 05:45:38,538 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 236 of 6549 statements. [2025-03-08 05:45:38,538 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-08 05:45:38,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:38,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:45:38,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1304765 backedges. 22466 proven. 210 refuted. 0 times theorem prover too weak. 1282089 trivial. 0 not checked. [2025-03-08 05:45:38,704 INFO L312 TraceCheckSpWp]: Computing backward predicates...