./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 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_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-?-798a7b3-m [2025-03-03 14:34:12,164 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:34:12,215 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:34:12,219 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:34:12,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:34:12,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:34:12,244 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:34:12,244 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:34:12,244 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:34:12,244 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:34:12,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:34:12,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:34:12,245 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:34:12,245 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:34:12,245 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:34:12,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:34:12,246 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:34:12,246 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:34:12,246 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:34:12,246 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:34:12,246 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:34:12,246 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:34:12,246 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:34:12,246 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:34:12,246 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:34:12,247 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:34:12,247 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:34:12,247 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:34:12,247 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:34:12,247 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:34:12,247 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:34:12,247 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:34:12,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:34:12,247 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:34:12,247 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:34:12,248 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:34:12,248 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:34:12,248 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:34:12,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:34:12,248 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:34:12,248 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:34:12,248 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:34:12,248 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:34:12,248 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 [2025-03-03 14:34:12,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:34:12,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:34:12,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:34:12,479 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:34:12,480 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:34:12,481 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2025-03-03 14:34:13,596 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2d84e5a/03681300a7cb41239837b4994c0e4530/FLAG0cddf0198 [2025-03-03 14:34:13,791 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:34:13,791 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_20-1.c [2025-03-03 14:34:13,796 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2d84e5a/03681300a7cb41239837b4994c0e4530/FLAG0cddf0198 [2025-03-03 14:34:14,157 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2d84e5a/03681300a7cb41239837b4994c0e4530 [2025-03-03 14:34:14,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:34:14,160 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:34:14,161 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:34:14,161 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:34:14,164 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:34:14,165 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,167 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c90bcc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14, skipping insertion in model container [2025-03-03 14:34:14,167 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,177 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:34:14,287 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] [2025-03-03 14:34:14,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:34:14,298 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:34:14,308 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] [2025-03-03 14:34:14,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:34:14,319 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:34:14,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14 WrapperNode [2025-03-03 14:34:14,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:34:14,321 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:34:14,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:34:14,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:34:14,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,330 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,339 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-03 14:34:14,341 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:34:14,341 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:34:14,342 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:34:14,342 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:34:14,347 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,353 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,361 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 14:34:14,362 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,362 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,363 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,364 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,367 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,368 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:34:14,368 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:34:14,368 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:34:14,368 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:34:14,369 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (1/1) ... [2025-03-03 14:34:14,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:34:14,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:14,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 14:34:14,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 14:34:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:34:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:34:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-03-03 14:34:14,419 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-03-03 14:34:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-03-03 14:34:14,419 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-03-03 14:34:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:34:14,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:34:14,465 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:34:14,467 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:34:14,532 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-03-03 14:34:14,550 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-03-03 14:34:14,559 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-03 14:34:14,559 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:34:14,565 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:34:14,566 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:34:14,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:34:14 BoogieIcfgContainer [2025-03-03 14:34:14,567 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:34:14,568 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:34:14,568 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:34:14,571 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:34:14,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:34:14" (1/3) ... [2025-03-03 14:34:14,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37232a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:34:14, skipping insertion in model container [2025-03-03 14:34:14,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:14" (2/3) ... [2025-03-03 14:34:14,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37232a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:34:14, skipping insertion in model container [2025-03-03 14:34:14,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:34:14" (3/3) ... [2025-03-03 14:34:14,573 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2025-03-03 14:34:14,584 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:34:14,586 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. [2025-03-03 14:34:14,632 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:34:14,640 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;@5cc12e7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:34:14,641 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:34:14,644 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) [2025-03-03 14:34:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:34:14,649 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:14,649 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:14,650 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:14,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-03-03 14:34:14,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:14,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229729639] [2025-03-03 14:34:14,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:14,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:14,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:34:14,729 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:34:14,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:14,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:34:14,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229729639] [2025-03-03 14:34:14,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229729639] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:34:14,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:34:14,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:34:14,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995583040] [2025-03-03 14:34:14,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:34:14,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:34:14,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:14,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:34:14,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:34:14,857 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) [2025-03-03 14:34:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:14,893 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2025-03-03 14:34:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:34:14,897 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 [2025-03-03 14:34:14,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:14,901 INFO L225 Difference]: With dead ends: 39 [2025-03-03 14:34:14,902 INFO L226 Difference]: Without dead ends: 27 [2025-03-03 14:34:14,904 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:34:14,907 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 [2025-03-03 14:34:14,908 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] [2025-03-03 14:34:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-03 14:34:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-03-03 14:34:14,930 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) [2025-03-03 14:34:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:34:14,935 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-03-03 14:34:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:14,935 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:34:14,936 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) [2025-03-03 14:34:14,936 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:34:14,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 14:34:14,937 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:14,937 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:14,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:34:14,938 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:14,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:14,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-03-03 14:34:14,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:14,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665759430] [2025-03-03 14:34:14,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:14,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:14,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 14:34:14,948 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 14:34:14,948 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:14,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:34:15,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:15,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665759430] [2025-03-03 14:34:15,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665759430] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:34:15,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:34:15,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:34:15,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447240987] [2025-03-03 14:34:15,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:34:15,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:34:15,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:15,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:34:15,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:34:15,010 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) [2025-03-03 14:34:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:15,029 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-03 14:34:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:34:15,030 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 [2025-03-03 14:34:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:15,031 INFO L225 Difference]: With dead ends: 33 [2025-03-03 14:34:15,031 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 14:34:15,031 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:34:15,032 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 [2025-03-03 14:34:15,032 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] [2025-03-03 14:34:15,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 14:34:15,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-03 14:34:15,036 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) [2025-03-03 14:34:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:34:15,038 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-03-03 14:34:15,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:15,038 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:34:15,038 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) [2025-03-03 14:34:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:34:15,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 14:34:15,039 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:15,040 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] [2025-03-03 14:34:15,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 14:34:15,040 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:15,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-03-03 14:34:15,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:15,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006066058] [2025-03-03 14:34:15,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:15,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:15,046 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:34:15,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:34:15,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:15,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:15,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:15,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006066058] [2025-03-03 14:34:15,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006066058] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:15,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954055424] [2025-03-03 14:34:15,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:15,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:15,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:15,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:15,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 14:34:15,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:34:15,199 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:34:15,199 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:15,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:15,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:34:15,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:15,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:15,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954055424] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:15,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:15,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-03 14:34:15,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141315315] [2025-03-03 14:34:15,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:15,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 14:34:15,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:15,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 14:34:15,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-03 14:34:15,497 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) [2025-03-03 14:34:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:15,604 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-03-03 14:34:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:34:15,607 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 [2025-03-03 14:34:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:15,608 INFO L225 Difference]: With dead ends: 55 [2025-03-03 14:34:15,608 INFO L226 Difference]: Without dead ends: 31 [2025-03-03 14:34:15,608 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 [2025-03-03 14:34:15,609 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 [2025-03-03 14:34:15,609 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] [2025-03-03 14:34:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-03 14:34:15,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-03-03 14:34:15,614 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) [2025-03-03 14:34:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-03 14:34:15,614 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-03-03 14:34:15,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:15,614 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-03 14:34:15,615 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) [2025-03-03 14:34:15,615 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-03 14:34:15,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 14:34:15,615 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:15,616 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] [2025-03-03 14:34:15,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:15,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:15,816 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:15,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-03-03 14:34:15,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:15,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705580844] [2025-03-03 14:34:15,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:15,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:15,821 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:34:15,827 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:34:15,827 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:15,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:15,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705580844] [2025-03-03 14:34:15,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705580844] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434773347] [2025-03-03 14:34:15,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:15,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:15,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:15,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:15,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 14:34:15,917 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:34:15,924 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:34:15,924 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:15,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:15,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:34:15,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:15,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:16,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434773347] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:16,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:16,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-03 14:34:16,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715894784] [2025-03-03 14:34:16,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:16,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 14:34:16,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:16,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 14:34:16,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:34:16,085 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) [2025-03-03 14:34:16,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:16,172 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-03 14:34:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:34:16,172 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 [2025-03-03 14:34:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:16,173 INFO L225 Difference]: With dead ends: 40 [2025-03-03 14:34:16,173 INFO L226 Difference]: Without dead ends: 36 [2025-03-03 14:34:16,173 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 [2025-03-03 14:34:16,174 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 [2025-03-03 14:34:16,174 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] [2025-03-03 14:34:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-03 14:34:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-03-03 14:34:16,178 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) [2025-03-03 14:34:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-03-03 14:34:16,181 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-03-03 14:34:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:16,181 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-03-03 14:34:16,181 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) [2025-03-03 14:34:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-03-03 14:34:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 14:34:16,182 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:16,182 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] [2025-03-03 14:34:16,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:16,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-03 14:34:16,383 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:16,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-03-03 14:34:16,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:16,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765234735] [2025-03-03 14:34:16,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:16,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:16,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:34:16,396 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:34:16,396 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:16,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:34:16,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:16,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765234735] [2025-03-03 14:34:16,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765234735] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:16,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180088269] [2025-03-03 14:34:16,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:16,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:16,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:16,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 14:34:16,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:34:16,499 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:34:16,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:16,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:16,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:34:16,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:34:16,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:34:16,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180088269] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:16,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:16,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-03-03 14:34:16,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113238435] [2025-03-03 14:34:16,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:16,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 14:34:16,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:16,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 14:34:16,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:34:16,851 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) [2025-03-03 14:34:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:16,984 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-03-03 14:34:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:34:16,984 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 [2025-03-03 14:34:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:16,985 INFO L225 Difference]: With dead ends: 69 [2025-03-03 14:34:16,985 INFO L226 Difference]: Without dead ends: 38 [2025-03-03 14:34:16,986 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 [2025-03-03 14:34:16,986 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 [2025-03-03 14:34:16,987 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] [2025-03-03 14:34:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-03 14:34:16,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-03 14:34:16,996 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) [2025-03-03 14:34:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-03-03 14:34:16,997 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-03-03 14:34:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:16,997 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-03-03 14:34:16,997 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) [2025-03-03 14:34:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-03-03 14:34:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 14:34:16,998 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:16,998 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] [2025-03-03 14:34:17,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:17,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:17,199 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:17,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:17,199 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-03-03 14:34:17,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:17,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943702288] [2025-03-03 14:34:17,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:17,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:17,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:34:17,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:34:17,210 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:17,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 14:34:17,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:17,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943702288] [2025-03-03 14:34:17,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943702288] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:17,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329416999] [2025-03-03 14:34:17,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:17,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:17,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:17,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:17,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 14:34:17,327 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:34:17,337 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:34:17,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:17,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:17,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:34:17,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:34:17,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:34:17,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329416999] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:17,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:17,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-03-03 14:34:17,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001701259] [2025-03-03 14:34:17,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:17,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:34:17,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:17,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:34:17,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:34:17,659 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) [2025-03-03 14:34:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:17,979 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-03-03 14:34:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:34:17,980 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 [2025-03-03 14:34:17,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:17,981 INFO L225 Difference]: With dead ends: 101 [2025-03-03 14:34:17,981 INFO L226 Difference]: Without dead ends: 68 [2025-03-03 14:34:17,982 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 [2025-03-03 14:34:17,982 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 [2025-03-03 14:34:17,982 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] [2025-03-03 14:34:17,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-03 14:34:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-03-03 14:34:17,994 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) [2025-03-03 14:34:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-03-03 14:34:17,998 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-03-03 14:34:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:17,998 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-03-03 14:34:17,998 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) [2025-03-03 14:34:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-03-03 14:34:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 14:34:18,002 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:18,002 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] [2025-03-03 14:34:18,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:18,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:18,203 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:18,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:18,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-03-03 14:34:18,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:18,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654776532] [2025-03-03 14:34:18,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:18,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:18,207 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:34:18,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:34:18,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:18,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 14:34:18,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:18,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654776532] [2025-03-03 14:34:18,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654776532] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:18,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43598942] [2025-03-03 14:34:18,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:18,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:18,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:18,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:18,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 14:34:18,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:34:18,347 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:34:18,347 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:18,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:18,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:34:18,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-03 14:34:18,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 14:34:18,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43598942] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:18,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:18,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-03-03 14:34:18,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394698918] [2025-03-03 14:34:18,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:18,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:34:18,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:18,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:34:18,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:34:18,771 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) [2025-03-03 14:34:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:18,935 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-03-03 14:34:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:18,935 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 [2025-03-03 14:34:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:18,936 INFO L225 Difference]: With dead ends: 102 [2025-03-03 14:34:18,936 INFO L226 Difference]: Without dead ends: 98 [2025-03-03 14:34:18,937 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 [2025-03-03 14:34:18,937 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 [2025-03-03 14:34:18,938 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] [2025-03-03 14:34:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-03 14:34:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-03-03 14:34:18,954 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) [2025-03-03 14:34:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-03-03 14:34:18,956 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-03-03 14:34:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:18,957 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-03-03 14:34:18,957 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) [2025-03-03 14:34:18,958 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-03-03 14:34:18,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-03 14:34:18,961 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:18,961 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] [2025-03-03 14:34:18,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:19,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:19,162 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:19,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1757221303, now seen corresponding path program 1 times [2025-03-03 14:34:19,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:19,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354050966] [2025-03-03 14:34:19,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:19,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:34:19,175 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:34:19,175 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:19,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2025-03-03 14:34:19,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:19,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354050966] [2025-03-03 14:34:19,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354050966] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:19,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253440157] [2025-03-03 14:34:19,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:19,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:19,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:19,291 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:19,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 14:34:19,322 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:34:19,340 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:34:19,341 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:19,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:19,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:34:19,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-03 14:34:19,430 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-03 14:34:20,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253440157] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:20,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:20,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-03-03 14:34:20,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047920005] [2025-03-03 14:34:20,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:20,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:34:20,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:20,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:34:20,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:20,102 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) [2025-03-03 14:34:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:20,558 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-03-03 14:34:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 14:34:20,559 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 [2025-03-03 14:34:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:20,563 INFO L225 Difference]: With dead ends: 177 [2025-03-03 14:34:20,563 INFO L226 Difference]: Without dead ends: 104 [2025-03-03 14:34:20,565 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 [2025-03-03 14:34:20,565 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:20,565 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 352 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 14:34:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-03 14:34:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-03-03 14:34:20,587 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) [2025-03-03 14:34:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-03-03 14:34:20,591 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2025-03-03 14:34:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:20,591 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-03-03 14:34:20,592 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) [2025-03-03 14:34:20,592 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-03-03 14:34:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-03 14:34:20,594 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:20,594 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] [2025-03-03 14:34:20,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:20,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:20,795 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:20,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash 869810860, now seen corresponding path program 1 times [2025-03-03 14:34:20,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:20,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34094936] [2025-03-03 14:34:20,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:20,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:20,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 146 statements into 1 equivalence classes. [2025-03-03 14:34:20,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 146 of 146 statements. [2025-03-03 14:34:20,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:20,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 49 proven. 151 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2025-03-03 14:34:20,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:20,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34094936] [2025-03-03 14:34:20,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34094936] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:20,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61746453] [2025-03-03 14:34:20,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:20,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:20,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:20,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:20,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 14:34:21,001 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 146 statements into 1 equivalence classes. [2025-03-03 14:34:21,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 146 of 146 statements. [2025-03-03 14:34:21,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:21,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:21,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:21,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 36 proven. 205 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2025-03-03 14:34:21,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 36 proven. 221 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2025-03-03 14:34:21,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61746453] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:21,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:21,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-03-03 14:34:21,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543797674] [2025-03-03 14:34:21,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:21,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:34:21,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:21,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:34:21,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:21,974 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) [2025-03-03 14:34:22,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:22,164 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-03-03 14:34:22,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:34:22,166 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 [2025-03-03 14:34:22,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:22,167 INFO L225 Difference]: With dead ends: 132 [2025-03-03 14:34:22,167 INFO L226 Difference]: Without dead ends: 128 [2025-03-03 14:34:22,169 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 [2025-03-03 14:34:22,170 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:22,170 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 209 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:22,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-03 14:34:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-03-03 14:34:22,183 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) [2025-03-03 14:34:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-03-03 14:34:22,185 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 146 [2025-03-03 14:34:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:22,185 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-03-03 14:34:22,185 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) [2025-03-03 14:34:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-03-03 14:34:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2025-03-03 14:34:22,187 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:22,188 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] [2025-03-03 14:34:22,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 14:34:22,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:22,388 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:22,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:22,389 INFO L85 PathProgramCache]: Analyzing trace with hash 108794173, now seen corresponding path program 2 times [2025-03-03 14:34:22,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:22,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914515948] [2025-03-03 14:34:22,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:22,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:22,399 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 285 statements into 2 equivalence classes. [2025-03-03 14:34:22,421 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 285 of 285 statements. [2025-03-03 14:34:22,421 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:22,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 566 refuted. 0 times theorem prover too weak. 1591 trivial. 0 not checked. [2025-03-03 14:34:22,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:22,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914515948] [2025-03-03 14:34:22,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914515948] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:22,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798986108] [2025-03-03 14:34:22,786 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:22,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:22,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:22,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:22,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 14:34:22,841 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 285 statements into 2 equivalence classes. [2025-03-03 14:34:22,887 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 285 of 285 statements. [2025-03-03 14:34:22,887 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:22,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:22,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:34:22,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 566 refuted. 0 times theorem prover too weak. 1591 trivial. 0 not checked. [2025-03-03 14:34:22,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 590 refuted. 0 times theorem prover too weak. 1567 trivial. 0 not checked. [2025-03-03 14:34:24,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798986108] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:24,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:24,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 20 [2025-03-03 14:34:24,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356887886] [2025-03-03 14:34:24,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:24,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 14:34:24,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:24,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 14:34:24,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:34:24,333 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) [2025-03-03 14:34:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:24,498 INFO L93 Difference]: Finished difference Result 148 states and 283 transitions. [2025-03-03 14:34:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:24,499 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 [2025-03-03 14:34:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:24,501 INFO L225 Difference]: With dead ends: 148 [2025-03-03 14:34:24,501 INFO L226 Difference]: Without dead ends: 144 [2025-03-03 14:34:24,501 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 [2025-03-03 14:34:24,501 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:24,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 174 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-03 14:34:24,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2025-03-03 14:34:24,512 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) [2025-03-03 14:34:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2025-03-03 14:34:24,514 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 285 [2025-03-03 14:34:24,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:24,514 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2025-03-03 14:34:24,514 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) [2025-03-03 14:34:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2025-03-03 14:34:24,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2025-03-03 14:34:24,517 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:24,517 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] [2025-03-03 14:34:24,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:24,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 14:34:24,718 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:24,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:24,718 INFO L85 PathProgramCache]: Analyzing trace with hash -935726768, now seen corresponding path program 3 times [2025-03-03 14:34:24,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:24,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332206515] [2025-03-03 14:34:24,718 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:24,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:24,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 378 statements into 23 equivalence classes. [2025-03-03 14:34:24,746 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 120 of 378 statements. [2025-03-03 14:34:24,746 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:34:24,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 564 proven. 88 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2025-03-03 14:34:24,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:24,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332206515] [2025-03-03 14:34:24,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332206515] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:24,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890484487] [2025-03-03 14:34:24,864 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:24,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:24,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:24,866 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:24,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 14:34:24,939 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 378 statements into 23 equivalence classes. [2025-03-03 14:34:24,978 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 120 of 378 statements. [2025-03-03 14:34:24,979 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:34:24,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:24,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:34:24,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 575 proven. 91 refuted. 0 times theorem prover too weak. 3389 trivial. 0 not checked. [2025-03-03 14:34:25,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 579 proven. 97 refuted. 0 times theorem prover too weak. 3379 trivial. 0 not checked. [2025-03-03 14:34:26,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890484487] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:26,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:26,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2025-03-03 14:34:26,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18771850] [2025-03-03 14:34:26,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:26,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:34:26,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:26,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:34:26,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:34:26,071 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) [2025-03-03 14:34:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:26,243 INFO L93 Difference]: Finished difference Result 159 states and 292 transitions. [2025-03-03 14:34:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:26,243 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 [2025-03-03 14:34:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:26,245 INFO L225 Difference]: With dead ends: 159 [2025-03-03 14:34:26,245 INFO L226 Difference]: Without dead ends: 155 [2025-03-03 14:34:26,245 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 [2025-03-03 14:34:26,246 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 [2025-03-03 14:34:26,246 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] [2025-03-03 14:34:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-03-03 14:34:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2025-03-03 14:34:26,266 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) [2025-03-03 14:34:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 249 transitions. [2025-03-03 14:34:26,268 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 249 transitions. Word has length 378 [2025-03-03 14:34:26,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:26,269 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 249 transitions. [2025-03-03 14:34:26,269 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) [2025-03-03 14:34:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 249 transitions. [2025-03-03 14:34:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2025-03-03 14:34:26,273 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:26,273 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] [2025-03-03 14:34:26,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:26,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:26,474 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:26,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash -353738821, now seen corresponding path program 4 times [2025-03-03 14:34:26,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:26,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577378451] [2025-03-03 14:34:26,474 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:26,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:26,490 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 679 statements into 2 equivalence classes. [2025-03-03 14:34:26,525 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 577 of 679 statements. [2025-03-03 14:34:26,527 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:26,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 278 proven. 1247 refuted. 0 times theorem prover too weak. 12089 trivial. 0 not checked. [2025-03-03 14:34:26,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:26,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577378451] [2025-03-03 14:34:26,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577378451] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:26,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092143195] [2025-03-03 14:34:26,819 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:26,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:26,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:26,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:26,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 14:34:26,910 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 679 statements into 2 equivalence classes. [2025-03-03 14:34:27,006 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 577 of 679 statements. [2025-03-03 14:34:27,006 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:27,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:27,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:34:27,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 2271 proven. 19 refuted. 0 times theorem prover too weak. 11324 trivial. 0 not checked. [2025-03-03 14:34:27,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 278 proven. 1435 refuted. 0 times theorem prover too weak. 11901 trivial. 0 not checked. [2025-03-03 14:34:28,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092143195] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:28,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:28,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2025-03-03 14:34:28,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945052145] [2025-03-03 14:34:28,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:28,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:34:28,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:28,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:34:28,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:34:28,675 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) [2025-03-03 14:34:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:28,809 INFO L93 Difference]: Finished difference Result 271 states and 534 transitions. [2025-03-03 14:34:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:34:28,809 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 [2025-03-03 14:34:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:28,811 INFO L225 Difference]: With dead ends: 271 [2025-03-03 14:34:28,811 INFO L226 Difference]: Without dead ends: 138 [2025-03-03 14:34:28,812 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 [2025-03-03 14:34:28,812 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 [2025-03-03 14:34:28,812 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] [2025-03-03 14:34:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-03-03 14:34:28,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2025-03-03 14:34:28,822 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) [2025-03-03 14:34:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 227 transitions. [2025-03-03 14:34:28,824 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 227 transitions. Word has length 679 [2025-03-03 14:34:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:28,825 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 227 transitions. [2025-03-03 14:34:28,825 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) [2025-03-03 14:34:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 227 transitions. [2025-03-03 14:34:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2025-03-03 14:34:28,829 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:28,829 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] [2025-03-03 14:34:28,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-03 14:34:29,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 14:34:29,029 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:29,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:29,030 INFO L85 PathProgramCache]: Analyzing trace with hash 727265831, now seen corresponding path program 5 times [2025-03-03 14:34:29,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:29,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125672451] [2025-03-03 14:34:29,030 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:29,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:29,040 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 487 statements into 33 equivalence classes. [2025-03-03 14:34:29,069 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 259 of 487 statements. [2025-03-03 14:34:29,069 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-03-03 14:34:29,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6854 backedges. 333 proven. 1125 refuted. 0 times theorem prover too weak. 5396 trivial. 0 not checked. [2025-03-03 14:34:29,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:29,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125672451] [2025-03-03 14:34:29,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125672451] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:29,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25139969] [2025-03-03 14:34:29,313 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:29,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:29,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:29,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:29,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 14:34:29,402 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 487 statements into 33 equivalence classes. [2025-03-03 14:34:29,450 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 259 of 487 statements. [2025-03-03 14:34:29,450 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-03-03 14:34:29,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:29,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:29,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6854 backedges. 2996 proven. 111 refuted. 0 times theorem prover too weak. 3747 trivial. 0 not checked. [2025-03-03 14:34:29,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6854 backedges. 331 proven. 1105 refuted. 0 times theorem prover too weak. 5418 trivial. 0 not checked. [2025-03-03 14:34:30,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25139969] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:30,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:30,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 15] total 24 [2025-03-03 14:34:30,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403403322] [2025-03-03 14:34:30,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:30,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 14:34:30,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:30,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 14:34:30,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2025-03-03 14:34:30,901 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) [2025-03-03 14:34:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:31,196 INFO L93 Difference]: Finished difference Result 286 states and 597 transitions. [2025-03-03 14:34:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 14:34:31,196 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 [2025-03-03 14:34:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:31,198 INFO L225 Difference]: With dead ends: 286 [2025-03-03 14:34:31,198 INFO L226 Difference]: Without dead ends: 132 [2025-03-03 14:34:31,200 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 [2025-03-03 14:34:31,200 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 [2025-03-03 14:34:31,200 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] [2025-03-03 14:34:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-03-03 14:34:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2025-03-03 14:34:31,208 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) [2025-03-03 14:34:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 195 transitions. [2025-03-03 14:34:31,210 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 195 transitions. Word has length 487 [2025-03-03 14:34:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:31,210 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 195 transitions. [2025-03-03 14:34:31,210 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) [2025-03-03 14:34:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 195 transitions. [2025-03-03 14:34:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2025-03-03 14:34:31,214 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:31,214 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] [2025-03-03 14:34:31,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:31,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 14:34:31,415 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:31,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:31,416 INFO L85 PathProgramCache]: Analyzing trace with hash 127438983, now seen corresponding path program 6 times [2025-03-03 14:34:31,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:31,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379869431] [2025-03-03 14:34:31,416 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:31,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:31,432 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 787 statements into 53 equivalence classes. [2025-03-03 14:34:31,463 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 269 of 787 statements. [2025-03-03 14:34:31,463 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-03 14:34:31,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18352 backedges. 540 proven. 1808 refuted. 0 times theorem prover too weak. 16004 trivial. 0 not checked. [2025-03-03 14:34:31,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:31,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379869431] [2025-03-03 14:34:31,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379869431] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:31,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041278874] [2025-03-03 14:34:31,684 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:31,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:31,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:31,686 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:31,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 14:34:31,804 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 787 statements into 53 equivalence classes. [2025-03-03 14:34:31,863 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 269 of 787 statements. [2025-03-03 14:34:31,864 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-03 14:34:31,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:31,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:31,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18352 backedges. 6364 proven. 61 refuted. 0 times theorem prover too weak. 11927 trivial. 0 not checked. [2025-03-03 14:34:31,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18352 backedges. 567 proven. 1993 refuted. 0 times theorem prover too weak. 15792 trivial. 0 not checked. [2025-03-03 14:34:33,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041278874] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:33,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:33,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 23 [2025-03-03 14:34:33,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628428570] [2025-03-03 14:34:33,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:33,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:34:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:33,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:34:33,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:33,883 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) [2025-03-03 14:34:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:34,176 INFO L93 Difference]: Finished difference Result 261 states and 473 transitions. [2025-03-03 14:34:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 14:34:34,177 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 [2025-03-03 14:34:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:34,178 INFO L225 Difference]: With dead ends: 261 [2025-03-03 14:34:34,178 INFO L226 Difference]: Without dead ends: 143 [2025-03-03 14:34:34,180 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 [2025-03-03 14:34:34,180 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2025-03-03 14:34:34,181 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] [2025-03-03 14:34:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-03-03 14:34:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2025-03-03 14:34:34,189 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) [2025-03-03 14:34:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 210 transitions. [2025-03-03 14:34:34,190 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 210 transitions. Word has length 787 [2025-03-03 14:34:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:34,191 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 210 transitions. [2025-03-03 14:34:34,191 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) [2025-03-03 14:34:34,191 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 210 transitions. [2025-03-03 14:34:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2025-03-03 14:34:34,193 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:34,193 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] [2025-03-03 14:34:34,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 14:34:34,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 14:34:34,394 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:34,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:34,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1724189175, now seen corresponding path program 7 times [2025-03-03 14:34:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:34,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295062906] [2025-03-03 14:34:34,394 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:34,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:34,404 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 513 statements into 1 equivalence classes. [2025-03-03 14:34:34,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 513 of 513 statements. [2025-03-03 14:34:34,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:34,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7615 backedges. 236 proven. 888 refuted. 0 times theorem prover too weak. 6491 trivial. 0 not checked. [2025-03-03 14:34:34,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:34,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295062906] [2025-03-03 14:34:34,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295062906] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:34,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846804048] [2025-03-03 14:34:34,715 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:34,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:34,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:34,718 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:34,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 14:34:34,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 513 statements into 1 equivalence classes. [2025-03-03 14:34:34,901 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 513 of 513 statements. [2025-03-03 14:34:34,901 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:34,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:34,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:34,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7615 backedges. 182 proven. 1297 refuted. 0 times theorem prover too weak. 6136 trivial. 0 not checked. [2025-03-03 14:34:35,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7615 backedges. 182 proven. 1330 refuted. 0 times theorem prover too weak. 6103 trivial. 0 not checked. [2025-03-03 14:34:37,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846804048] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:37,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:37,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 19] total 26 [2025-03-03 14:34:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872815395] [2025-03-03 14:34:37,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:37,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 14:34:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:37,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 14:34:37,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:34:37,094 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) [2025-03-03 14:34:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:37,348 INFO L93 Difference]: Finished difference Result 195 states and 399 transitions. [2025-03-03 14:34:37,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 14:34:37,349 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 [2025-03-03 14:34:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:37,351 INFO L225 Difference]: With dead ends: 195 [2025-03-03 14:34:37,351 INFO L226 Difference]: Without dead ends: 191 [2025-03-03 14:34:37,352 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 [2025-03-03 14:34:37,353 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:37,353 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 214 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2025-03-03 14:34:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 163. [2025-03-03 14:34:37,367 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) [2025-03-03 14:34:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 284 transitions. [2025-03-03 14:34:37,368 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 284 transitions. Word has length 513 [2025-03-03 14:34:37,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:37,368 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 284 transitions. [2025-03-03 14:34:37,369 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) [2025-03-03 14:34:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 284 transitions. [2025-03-03 14:34:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2025-03-03 14:34:37,375 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:37,375 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] [2025-03-03 14:34:37,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:37,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 14:34:37,576 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:37,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:37,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1844293001, now seen corresponding path program 8 times [2025-03-03 14:34:37,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:37,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538748495] [2025-03-03 14:34:37,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:37,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:37,596 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1141 statements into 2 equivalence classes. [2025-03-03 14:34:37,681 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1141 of 1141 statements. [2025-03-03 14:34:37,681 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:37,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 38777 backedges. 467 proven. 2623 refuted. 0 times theorem prover too weak. 35687 trivial. 0 not checked. [2025-03-03 14:34:38,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:38,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538748495] [2025-03-03 14:34:38,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538748495] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:38,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27040845] [2025-03-03 14:34:38,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:38,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:38,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:38,434 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:38,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 14:34:38,594 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1141 statements into 2 equivalence classes. [2025-03-03 14:34:38,748 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1141 of 1141 statements. [2025-03-03 14:34:38,748 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:38,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:38,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 14:34:38,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 38777 backedges. 408 proven. 3562 refuted. 0 times theorem prover too weak. 34807 trivial. 0 not checked. [2025-03-03 14:34:38,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 38777 backedges. 408 proven. 3606 refuted. 0 times theorem prover too weak. 34763 trivial. 0 not checked. [2025-03-03 14:34:42,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27040845] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:42,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:42,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 29 [2025-03-03 14:34:42,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469099362] [2025-03-03 14:34:42,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:42,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 14:34:42,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:42,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 14:34:42,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:34:42,650 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) [2025-03-03 14:34:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:42,959 INFO L93 Difference]: Finished difference Result 232 states and 556 transitions. [2025-03-03 14:34:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 14:34:42,960 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 [2025-03-03 14:34:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:42,964 INFO L225 Difference]: With dead ends: 232 [2025-03-03 14:34:42,964 INFO L226 Difference]: Without dead ends: 228 [2025-03-03 14:34:42,965 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 [2025-03-03 14:34:42,965 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 124 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:42,965 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 271 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-03-03 14:34:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 153. [2025-03-03 14:34:42,978 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) [2025-03-03 14:34:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 256 transitions. [2025-03-03 14:34:42,980 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 256 transitions. Word has length 1141 [2025-03-03 14:34:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:42,980 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 256 transitions. [2025-03-03 14:34:42,980 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) [2025-03-03 14:34:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 256 transitions. [2025-03-03 14:34:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1659 [2025-03-03 14:34:42,991 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:42,992 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] [2025-03-03 14:34:43,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:43,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:43,192 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:43,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:43,193 INFO L85 PathProgramCache]: Analyzing trace with hash -236708604, now seen corresponding path program 9 times [2025-03-03 14:34:43,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:43,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292362579] [2025-03-03 14:34:43,193 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:43,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:43,218 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1658 statements into 105 equivalence classes. [2025-03-03 14:34:43,247 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 237 of 1658 statements. [2025-03-03 14:34:43,248 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-03 14:34:43,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 82575 backedges. 4121 proven. 80 refuted. 0 times theorem prover too weak. 78374 trivial. 0 not checked. [2025-03-03 14:34:43,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:43,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292362579] [2025-03-03 14:34:43,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292362579] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:43,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3708139] [2025-03-03 14:34:43,386 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:43,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:43,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:43,389 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:43,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 14:34:43,580 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1658 statements into 105 equivalence classes. [2025-03-03 14:34:43,620 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 237 of 1658 statements. [2025-03-03 14:34:43,620 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-03 14:34:43,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:43,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:43,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 82575 backedges. 4537 proven. 93 refuted. 0 times theorem prover too weak. 77945 trivial. 0 not checked. [2025-03-03 14:34:43,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 82575 backedges. 4537 proven. 98 refuted. 0 times theorem prover too weak. 77940 trivial. 0 not checked. [2025-03-03 14:34:47,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3708139] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:47,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:47,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 26 [2025-03-03 14:34:47,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208514320] [2025-03-03 14:34:47,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:47,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 14:34:47,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:47,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 14:34:47,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:34:47,211 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) [2025-03-03 14:34:47,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:47,488 INFO L93 Difference]: Finished difference Result 331 states and 669 transitions. [2025-03-03 14:34:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 14:34:47,489 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 [2025-03-03 14:34:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:47,490 INFO L225 Difference]: With dead ends: 331 [2025-03-03 14:34:47,490 INFO L226 Difference]: Without dead ends: 183 [2025-03-03 14:34:47,492 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 [2025-03-03 14:34:47,492 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 55 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:47,492 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 407 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:47,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2025-03-03 14:34:47,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2025-03-03 14:34:47,502 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) [2025-03-03 14:34:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 273 transitions. [2025-03-03 14:34:47,503 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 273 transitions. Word has length 1658 [2025-03-03 14:34:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:47,503 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 273 transitions. [2025-03-03 14:34:47,504 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) [2025-03-03 14:34:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 273 transitions. [2025-03-03 14:34:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2992 [2025-03-03 14:34:47,557 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:47,557 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] [2025-03-03 14:34:47,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:47,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 14:34:47,758 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:47,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1594985372, now seen corresponding path program 10 times [2025-03-03 14:34:47,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:47,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83907328] [2025-03-03 14:34:47,759 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:47,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:47,797 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2991 statements into 2 equivalence classes. [2025-03-03 14:34:48,136 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2549 of 2991 statements. [2025-03-03 14:34:48,137 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:48,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 271246 backedges. 1703 proven. 11530 refuted. 0 times theorem prover too weak. 258013 trivial. 0 not checked. [2025-03-03 14:34:51,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:51,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83907328] [2025-03-03 14:34:51,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83907328] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:51,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794215906] [2025-03-03 14:34:51,906 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:51,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:51,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:51,908 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:51,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 14:34:52,186 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2991 statements into 2 equivalence classes. [2025-03-03 14:34:52,605 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2549 of 2991 statements. [2025-03-03 14:34:52,605 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:52,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:52,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 5320 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:34:52,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 271246 backedges. 42066 proven. 502 refuted. 0 times theorem prover too weak. 228678 trivial. 0 not checked. [2025-03-03 14:34:52,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 271246 backedges. 1756 proven. 13932 refuted. 0 times theorem prover too weak. 255558 trivial. 0 not checked. [2025-03-03 14:35:00,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794215906] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:00,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:00,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 23] total 31 [2025-03-03 14:35:00,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019236197] [2025-03-03 14:35:00,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:00,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 14:35:00,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:00,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 14:35:00,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2025-03-03 14:35:00,709 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) [2025-03-03 14:35:01,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:01,299 INFO L93 Difference]: Finished difference Result 376 states and 724 transitions. [2025-03-03 14:35:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-03 14:35:01,300 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 [2025-03-03 14:35:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:01,302 INFO L225 Difference]: With dead ends: 376 [2025-03-03 14:35:01,302 INFO L226 Difference]: Without dead ends: 210 [2025-03-03 14:35:01,304 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 [2025-03-03 14:35:01,304 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 130 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:01,305 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 368 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 14:35:01,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2025-03-03 14:35:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 184. [2025-03-03 14:35:01,317 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) [2025-03-03 14:35:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 304 transitions. [2025-03-03 14:35:01,319 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 304 transitions. Word has length 2991 [2025-03-03 14:35:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:01,319 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 304 transitions. [2025-03-03 14:35:01,320 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) [2025-03-03 14:35:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 304 transitions. [2025-03-03 14:35:01,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2026 [2025-03-03 14:35:01,336 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:01,336 INFO L218 NwaCegarLoop]: trace histogram [157, 157, 140, 140, 120, 119, 78, 78, 78, 78, 78, 78, 78, 70, 70, 70, 70, 70, 70, 70, 49, 42, 38, 20, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:01,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:01,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 14:35:01,537 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:01,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2069518895, now seen corresponding path program 11 times [2025-03-03 14:35:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599274168] [2025-03-03 14:35:01,538 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:01,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:01,594 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 2025 statements into 123 equivalence classes. [2025-03-03 14:35:01,605 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 169 of 2025 statements. [2025-03-03 14:35:01,605 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 14:35:01,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 123737 backedges. 1583 proven. 5558 refuted. 0 times theorem prover too weak. 116596 trivial. 0 not checked. [2025-03-03 14:35:01,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:01,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599274168] [2025-03-03 14:35:01,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599274168] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:01,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716423099] [2025-03-03 14:35:01,762 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:01,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:01,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:01,764 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:01,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 14:35:02,021 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 2025 statements into 123 equivalence classes. [2025-03-03 14:35:02,046 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 169 of 2025 statements. [2025-03-03 14:35:02,046 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 14:35:02,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:02,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:35:02,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 123737 backedges. 29992 proven. 65 refuted. 0 times theorem prover too weak. 93680 trivial. 0 not checked. [2025-03-03 14:35:02,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 123737 backedges. 1638 proven. 6074 refuted. 0 times theorem prover too weak. 116025 trivial. 0 not checked. [2025-03-03 14:35:06,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716423099] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:06,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:06,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 22 [2025-03-03 14:35:06,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571416279] [2025-03-03 14:35:06,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:06,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 14:35:06,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:06,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 14:35:06,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:35:06,754 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) [2025-03-03 14:35:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:06,943 INFO L93 Difference]: Finished difference Result 354 states and 661 transitions. [2025-03-03 14:35:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:35:06,943 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 2025 [2025-03-03 14:35:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:06,945 INFO L225 Difference]: With dead ends: 354 [2025-03-03 14:35:06,945 INFO L226 Difference]: Without dead ends: 177 [2025-03-03 14:35:06,947 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4072 GetRequests, 4036 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2025-03-03 14:35:06,947 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:06,947 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 311 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2025-03-03 14:35:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2025-03-03 14:35:06,957 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) [2025-03-03 14:35:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 283 transitions. [2025-03-03 14:35:06,958 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 283 transitions. Word has length 2025 [2025-03-03 14:35:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:06,959 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 283 transitions. [2025-03-03 14:35:06,959 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) [2025-03-03 14:35:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 283 transitions. [2025-03-03 14:35:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1606 [2025-03-03 14:35:06,970 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:06,970 INFO L218 NwaCegarLoop]: trace histogram [124, 124, 111, 111, 98, 93, 62, 62, 62, 62, 62, 62, 62, 55, 55, 55, 55, 55, 55, 55, 43, 31, 26, 18, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:06,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 14:35:07,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:07,175 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:07,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash 237025229, now seen corresponding path program 12 times [2025-03-03 14:35:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:07,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268541731] [2025-03-03 14:35:07,176 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:35:07,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:07,222 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1605 statements into 105 equivalence classes. [2025-03-03 14:35:07,257 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) and asserted 323 of 1605 statements. [2025-03-03 14:35:07,258 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2025-03-03 14:35:07,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 77459 backedges. 5244 proven. 77 refuted. 0 times theorem prover too weak. 72138 trivial. 0 not checked. [2025-03-03 14:35:07,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:07,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268541731] [2025-03-03 14:35:07,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268541731] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:07,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215402853] [2025-03-03 14:35:07,473 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:35:07,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:07,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:07,475 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:07,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 14:35:07,716 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1605 statements into 105 equivalence classes. [2025-03-03 14:35:07,767 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) and asserted 323 of 1605 statements. [2025-03-03 14:35:07,767 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2025-03-03 14:35:07,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:07,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:35:07,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 77459 backedges. 5322 proven. 86 refuted. 0 times theorem prover too weak. 72051 trivial. 0 not checked. [2025-03-03 14:35:07,853 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 77459 backedges. 5322 proven. 92 refuted. 0 times theorem prover too weak. 72045 trivial. 0 not checked. [2025-03-03 14:35:11,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215402853] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:11,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:11,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 25 [2025-03-03 14:35:11,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430109288] [2025-03-03 14:35:11,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:11,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 14:35:11,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:11,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 14:35:11,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:35:11,355 INFO L87 Difference]: Start difference. First operand 175 states and 283 transitions. Second operand has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 14:35:11,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:11,621 INFO L93 Difference]: Finished difference Result 332 states and 574 transitions. [2025-03-03 14:35:11,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 14:35:11,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 1605 [2025-03-03 14:35:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:11,623 INFO L225 Difference]: With dead ends: 332 [2025-03-03 14:35:11,623 INFO L226 Difference]: Without dead ends: 164 [2025-03-03 14:35:11,624 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3235 GetRequests, 3195 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 14:35:11,625 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:11,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 365 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:35:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2025-03-03 14:35:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2025-03-03 14:35:11,633 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) [2025-03-03 14:35:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2025-03-03 14:35:11,634 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 1605 [2025-03-03 14:35:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:11,635 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2025-03-03 14:35:11,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 14:35:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2025-03-03 14:35:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1959 [2025-03-03 14:35:11,650 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:11,650 INFO L218 NwaCegarLoop]: trace histogram [147, 147, 140, 140, 118, 114, 73, 73, 73, 73, 73, 73, 73, 70, 70, 70, 70, 70, 70, 70, 48, 41, 29, 26, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:11,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 14:35:11,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:11,851 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:11,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash -730158561, now seen corresponding path program 13 times [2025-03-03 14:35:11,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:11,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841510329] [2025-03-03 14:35:11,852 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:35:11,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:11,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1958 statements into 1 equivalence classes. [2025-03-03 14:35:12,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1958 of 1958 statements. [2025-03-03 14:35:12,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:12,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 115360 backedges. 1019 proven. 6738 refuted. 0 times theorem prover too weak. 107603 trivial. 0 not checked. [2025-03-03 14:35:14,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:14,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841510329] [2025-03-03 14:35:14,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841510329] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:14,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645952202] [2025-03-03 14:35:14,259 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:35:14,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:14,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:14,261 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:14,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 14:35:14,547 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1958 statements into 1 equivalence classes. [2025-03-03 14:35:14,804 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1958 of 1958 statements. [2025-03-03 14:35:14,804 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:14,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:14,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 4367 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:35:14,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 115360 backedges. 1019 proven. 6738 refuted. 0 times theorem prover too weak. 107603 trivial. 0 not checked. [2025-03-03 14:35:14,899 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 115360 backedges. 1019 proven. 6794 refuted. 0 times theorem prover too weak. 107547 trivial. 0 not checked. [2025-03-03 14:35:20,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645952202] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:20,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:20,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 26 [2025-03-03 14:35:20,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61107139] [2025-03-03 14:35:20,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:20,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 14:35:20,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:20,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 14:35:20,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:35:20,855 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) [2025-03-03 14:35:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:21,083 INFO L93 Difference]: Finished difference Result 180 states and 298 transitions. [2025-03-03 14:35:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:35:21,084 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 1958 [2025-03-03 14:35:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:21,088 INFO L225 Difference]: With dead ends: 180 [2025-03-03 14:35:21,088 INFO L226 Difference]: Without dead ends: 176 [2025-03-03 14:35:21,088 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3946 GetRequests, 3903 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 14:35:21,089 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:21,089 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 233 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2025-03-03 14:35:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 153. [2025-03-03 14:35:21,105 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) [2025-03-03 14:35:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 218 transitions. [2025-03-03 14:35:21,106 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 218 transitions. Word has length 1958 [2025-03-03 14:35:21,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:21,107 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 218 transitions. [2025-03-03 14:35:21,108 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), 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) [2025-03-03 14:35:21,108 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 218 transitions. [2025-03-03 14:35:21,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1646 [2025-03-03 14:35:21,132 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:21,132 INFO L218 NwaCegarLoop]: trace histogram [121, 121, 120, 120, 99, 96, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 39, 36, 24, 22, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:21,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-03 14:35:21,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:21,333 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:21,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:21,334 INFO L85 PathProgramCache]: Analyzing trace with hash -105740447, now seen corresponding path program 14 times [2025-03-03 14:35:21,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:21,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689153697] [2025-03-03 14:35:21,334 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:21,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:21,374 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1645 statements into 2 equivalence classes. [2025-03-03 14:35:21,551 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1645 of 1645 statements. [2025-03-03 14:35:21,551 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:21,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 81171 backedges. 1350 proven. 4480 refuted. 0 times theorem prover too weak. 75341 trivial. 0 not checked. [2025-03-03 14:35:23,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:23,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689153697] [2025-03-03 14:35:23,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689153697] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:23,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621693115] [2025-03-03 14:35:23,110 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:23,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:23,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:23,114 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:23,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 14:35:23,391 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1645 statements into 2 equivalence classes. [2025-03-03 14:35:23,597 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1645 of 1645 statements. [2025-03-03 14:35:23,597 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:23,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:23,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 3672 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 14:35:23,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 81171 backedges. 848 proven. 6270 refuted. 0 times theorem prover too weak. 74053 trivial. 0 not checked. [2025-03-03 14:35:23,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 81171 backedges. 848 proven. 6340 refuted. 0 times theorem prover too weak. 73983 trivial. 0 not checked. [2025-03-03 14:35:29,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621693115] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:29,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:29,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 25] total 32 [2025-03-03 14:35:29,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654818920] [2025-03-03 14:35:29,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:29,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 14:35:29,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:29,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 14:35:29,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2025-03-03 14:35:29,700 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) [2025-03-03 14:35:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:29,955 INFO L93 Difference]: Finished difference Result 220 states and 482 transitions. [2025-03-03 14:35:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 14:35:29,959 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 1645 [2025-03-03 14:35:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:29,963 INFO L225 Difference]: With dead ends: 220 [2025-03-03 14:35:29,963 INFO L226 Difference]: Without dead ends: 216 [2025-03-03 14:35:29,964 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3323 GetRequests, 3268 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 14:35:29,965 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:29,965 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 267 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:29,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2025-03-03 14:35:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2025-03-03 14:35:29,980 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) [2025-03-03 14:35:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 275 transitions. [2025-03-03 14:35:29,981 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 275 transitions. Word has length 1645 [2025-03-03 14:35:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:29,982 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 275 transitions. [2025-03-03 14:35:29,982 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) [2025-03-03 14:35:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 275 transitions. [2025-03-03 14:35:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5826 [2025-03-03 14:35:30,129 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:30,130 INFO L218 NwaCegarLoop]: trace histogram [437, 437, 418, 418, 347, 344, 218, 218, 218, 218, 218, 218, 218, 209, 209, 209, 209, 209, 209, 209, 138, 126, 90, 74, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:30,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-03 14:35:30,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 14:35:30,331 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:30,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1639772983, now seen corresponding path program 15 times [2025-03-03 14:35:30,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:30,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378194001] [2025-03-03 14:35:30,333 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:30,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:30,409 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 5825 statements into 349 equivalence classes. [2025-03-03 14:35:30,428 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 271 of 5825 statements. [2025-03-03 14:35:30,428 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-03 14:35:30,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1030259 backedges. 18170 proven. 125 refuted. 0 times theorem prover too weak. 1011964 trivial. 0 not checked. [2025-03-03 14:35:30,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:30,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378194001] [2025-03-03 14:35:30,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378194001] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:30,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514920837] [2025-03-03 14:35:30,622 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:30,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:30,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:30,624 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:30,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 14:35:31,145 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 5825 statements into 349 equivalence classes. [2025-03-03 14:35:31,193 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 271 of 5825 statements. [2025-03-03 14:35:31,193 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-03 14:35:31,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:31,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:35:31,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1030259 backedges. 20068 proven. 145 refuted. 0 times theorem prover too weak. 1010046 trivial. 0 not checked. [2025-03-03 14:35:31,355 INFO L312 TraceCheckSpWp]: Computing backward predicates...