./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_10-1.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_10-1.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 b6366e3b98da5ee88513ec6586b547e61d25aed49a53277f23448bdf367b4562 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:33:49,059 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:33:49,107 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:33:49,111 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:33:49,111 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:33:49,125 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:33:49,126 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:33:49,126 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:33:49,126 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:33:49,126 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:33:49,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:33:49,126 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:33:49,127 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:33:49,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:33:49,127 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:33:49,128 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:33:49,128 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:33:49,128 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:33:49,128 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 -> b6366e3b98da5ee88513ec6586b547e61d25aed49a53277f23448bdf367b4562 [2025-03-03 14:33:49,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:33:49,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:33:49,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:33:49,359 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:33:49,360 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:33:49,361 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_10-1.c [2025-03-03 14:33:50,471 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d370305/e0f711f2f80b4bc089ec64b833654e46/FLAG6a3a94359 [2025-03-03 14:33:50,658 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:33:50,659 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_10-1.c [2025-03-03 14:33:50,664 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d370305/e0f711f2f80b4bc089ec64b833654e46/FLAG6a3a94359 [2025-03-03 14:33:51,044 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d370305/e0f711f2f80b4bc089ec64b833654e46 [2025-03-03 14:33:51,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:33:51,047 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:33:51,048 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:33:51,048 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:33:51,051 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:33:51,051 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,052 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1502474c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51, skipping insertion in model container [2025-03-03 14:33:51,052 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,062 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:33:51,163 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_10-1.c[949,962] [2025-03-03 14:33:51,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:33:51,173 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:33:51,183 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_10-1.c[949,962] [2025-03-03 14:33:51,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:33:51,194 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:33:51,195 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51 WrapperNode [2025-03-03 14:33:51,195 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:33:51,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:33:51,196 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:33:51,196 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:33:51,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,205 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,214 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-03 14:33:51,216 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:33:51,216 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:33:51,217 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:33:51,217 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:33:51,223 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,227 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,235 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 14:33:51,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,237 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,241 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,242 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,242 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,243 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,244 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:33:51,244 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:33:51,244 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:33:51,244 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:33:51,245 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (1/1) ... [2025-03-03 14:33:51,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:33:51,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:51,270 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 14:33:51,274 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 14:33:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:33:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:33:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-03-03 14:33:51,292 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-03-03 14:33:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-03-03 14:33:51,292 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-03-03 14:33:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:33:51,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:33:51,327 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:33:51,328 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:33:51,387 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-03-03 14:33:51,397 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-03-03 14:33:51,403 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-03 14:33:51,403 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:33:51,410 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:33:51,411 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:33:51,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:33:51 BoogieIcfgContainer [2025-03-03 14:33:51,415 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:33:51,416 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:33:51,417 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:33:51,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:33:51,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:33:51" (1/3) ... [2025-03-03 14:33:51,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495a5f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:33:51, skipping insertion in model container [2025-03-03 14:33:51,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:51" (2/3) ... [2025-03-03 14:33:51,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495a5f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:33:51, skipping insertion in model container [2025-03-03 14:33:51,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:33:51" (3/3) ... [2025-03-03 14:33:51,421 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-1.c [2025-03-03 14:33:51,431 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:33:51,432 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_10-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 14:33:51,472 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:33:51,482 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;@c30ea8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:33:51,482 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:33:51,485 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 14:33:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:33:51,490 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:51,490 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:51,491 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:51,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:51,495 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-03-03 14:33:51,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:51,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826308778] [2025-03-03 14:33:51,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:51,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:51,546 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:33:51,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:33:51,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:51,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:51,642 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 14:33:51,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:51,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826308778] [2025-03-03 14:33:51,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826308778] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:33:51,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:33:51,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:33:51,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984253857] [2025-03-03 14:33:51,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:33:51,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:33:51,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:51,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:33:51,662 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:51,663 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, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:51,724 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2025-03-03 14:33:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:33:51,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-03-03 14:33:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:51,730 INFO L225 Difference]: With dead ends: 41 [2025-03-03 14:33:51,731 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 14:33:51,733 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 14:33:51,737 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:51,738 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:33:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 14:33:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-03 14:33:51,759 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 14:33:51,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:33:51,764 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-03-03 14:33:51,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:51,765 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:33:51,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:51,765 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:33:51,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 14:33:51,765 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:51,765 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:51,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:33:51,766 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:51,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:51,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-03-03 14:33:51,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:51,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157146291] [2025-03-03 14:33:51,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:51,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 14:33:51,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 14:33:51,781 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:51,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:51,828 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 14:33:51,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:51,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157146291] [2025-03-03 14:33:51,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157146291] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:33:51,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:33:51,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:33:51,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076093152] [2025-03-03 14:33:51,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:33:51,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:33:51,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:51,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:33:51,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:51,833 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:51,874 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-03 14:33:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:33:51,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-03 14:33:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:51,875 INFO L225 Difference]: With dead ends: 33 [2025-03-03 14:33:51,876 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 14:33:51,876 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 14:33:51,876 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:51,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:33:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 14:33:51,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-03 14:33:51,881 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 14:33:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:33:51,881 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-03-03 14:33:51,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:51,881 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:33:51,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:51,882 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:33:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 14:33:51,882 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:51,882 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 14:33:51,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 14:33:51,883 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:51,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-03-03 14:33:51,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667698390] [2025-03-03 14:33:51,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:51,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:51,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:33:51,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:33:51,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:51,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:51,965 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 14:33:51,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:51,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667698390] [2025-03-03 14:33:51,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667698390] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:51,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722377906] [2025-03-03 14:33:51,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:51,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:51,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:51,967 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 14:33:51,969 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 14:33:51,992 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:33:52,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:33:52,008 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:52,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:52,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:33:52,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:52,079 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 14:33:52,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:52,241 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 14:33:52,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722377906] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:52,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:52,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-03 14:33:52,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328545847] [2025-03-03 14:33:52,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:52,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 14:33:52,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:52,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 14:33:52,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-03 14:33:52,243 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 14:33:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:52,344 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-03-03 14:33:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:33:52,345 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 14:33:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:52,346 INFO L225 Difference]: With dead ends: 55 [2025-03-03 14:33:52,346 INFO L226 Difference]: Without dead ends: 31 [2025-03-03 14:33:52,346 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 14:33:52,347 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:52,348 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 118 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-03 14:33:52,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-03-03 14:33:52,352 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 14:33:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-03 14:33:52,353 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-03-03 14:33:52,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:52,353 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-03 14:33:52,354 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 14:33:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-03 14:33:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 14:33:52,354 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:52,354 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 14:33:52,360 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 14:33:52,555 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 14:33:52,555 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:52,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:52,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-03-03 14:33:52,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:52,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085069775] [2025-03-03 14:33:52,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:52,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:52,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:33:52,564 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:33:52,564 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:52,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:52,642 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 14:33:52,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:52,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085069775] [2025-03-03 14:33:52,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085069775] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:52,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885109101] [2025-03-03 14:33:52,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:52,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:52,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:52,644 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 14:33:52,645 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 14:33:52,665 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:33:52,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:33:52,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:52,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:52,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:33:52,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:52,711 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 14:33:52,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:52,864 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 14:33:52,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885109101] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:52,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:52,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-03 14:33:52,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606554179] [2025-03-03 14:33:52,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:52,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 14:33:52,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:52,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 14:33:52,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:33:52,865 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 14:33:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:52,964 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-03 14:33:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:33:52,965 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 14:33:52,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:52,965 INFO L225 Difference]: With dead ends: 40 [2025-03-03 14:33:52,967 INFO L226 Difference]: Without dead ends: 36 [2025-03-03 14:33:52,967 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 14:33:52,968 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:52,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-03 14:33:52,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-03-03 14:33:52,973 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 14:33:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-03-03 14:33:52,974 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-03-03 14:33:52,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:52,974 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-03-03 14:33:52,974 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 14:33:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-03-03 14:33:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 14:33:52,978 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:52,978 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 14:33:52,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 14:33:53,180 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 14:33:53,181 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:53,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:53,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-03-03 14:33:53,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:53,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347963575] [2025-03-03 14:33:53,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:53,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:53,185 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:33:53,191 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:33:53,191 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:53,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:53,251 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 14:33:53,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:53,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347963575] [2025-03-03 14:33:53,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347963575] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:53,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918500514] [2025-03-03 14:33:53,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:53,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:53,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:53,256 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 14:33:53,258 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 14:33:53,279 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:33:53,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:33:53,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:53,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:53,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:33:53,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:53,359 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 14:33:53,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:53,614 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 14:33:53,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918500514] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:53,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:53,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-03-03 14:33:53,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830982794] [2025-03-03 14:33:53,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:53,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 14:33:53,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:53,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 14:33:53,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:33:53,618 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 14:33:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:53,753 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-03-03 14:33:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:33:53,754 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 14:33:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:53,755 INFO L225 Difference]: With dead ends: 69 [2025-03-03 14:33:53,755 INFO L226 Difference]: Without dead ends: 38 [2025-03-03 14:33:53,755 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 14:33:53,756 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:53,756 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-03 14:33:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-03 14:33:53,763 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 14:33:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-03-03 14:33:53,764 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-03-03 14:33:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:53,764 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-03-03 14:33:53,764 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 14:33:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-03-03 14:33:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 14:33:53,766 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:53,766 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 14:33:53,772 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 14:33:53,966 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 14:33:53,967 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:53,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:53,967 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-03-03 14:33:53,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:53,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023808673] [2025-03-03 14:33:53,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:53,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:53,971 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:33:53,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:33:53,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:53,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:54,072 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 14:33:54,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:54,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023808673] [2025-03-03 14:33:54,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023808673] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:54,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151159349] [2025-03-03 14:33:54,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:54,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:54,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:54,074 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 14:33:54,076 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 14:33:54,101 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:33:54,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:33:54,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:54,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:54,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:33:54,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:54,182 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 14:33:54,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:54,450 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 14:33:54,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151159349] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:54,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:54,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-03-03 14:33:54,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33578810] [2025-03-03 14:33:54,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:54,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:33:54,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:54,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:33:54,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:33:54,454 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 14:33:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:54,757 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-03-03 14:33:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:33:54,757 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 14:33:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:54,758 INFO L225 Difference]: With dead ends: 101 [2025-03-03 14:33:54,758 INFO L226 Difference]: Without dead ends: 68 [2025-03-03 14:33:54,759 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:33:54,759 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:54,760 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:33:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-03 14:33:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-03-03 14:33:54,774 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 14:33:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-03-03 14:33:54,775 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-03-03 14:33:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:54,775 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-03-03 14:33:54,775 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 14:33:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-03-03 14:33:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 14:33:54,777 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:54,777 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 14:33:54,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 14:33:54,978 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 14:33:54,978 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:54,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:54,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-03-03 14:33:54,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:54,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550675373] [2025-03-03 14:33:54,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:54,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:54,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:33:54,989 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:33:54,989 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:54,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:55,053 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 14:33:55,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:55,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550675373] [2025-03-03 14:33:55,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550675373] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:55,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799722645] [2025-03-03 14:33:55,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:55,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:55,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:55,056 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 14:33:55,058 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 14:33:55,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:33:55,099 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:33:55,099 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:55,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:55,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:33:55,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:55,169 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 14:33:55,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:55,553 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 14:33:55,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799722645] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:55,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:55,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-03-03 14:33:55,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583987522] [2025-03-03 14:33:55,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:55,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:33:55,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:55,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:33:55,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:33:55,556 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 14:33:55,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:55,700 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-03-03 14:33:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:33:55,701 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 14:33:55,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:55,702 INFO L225 Difference]: With dead ends: 102 [2025-03-03 14:33:55,702 INFO L226 Difference]: Without dead ends: 98 [2025-03-03 14:33:55,703 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 14:33:55,703 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:55,703 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 164 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-03 14:33:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-03-03 14:33:55,713 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 14:33:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-03-03 14:33:55,714 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-03-03 14:33:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:55,714 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-03-03 14:33:55,714 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 14:33:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-03-03 14:33:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-03 14:33:55,722 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:55,722 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 14:33:55,727 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 14:33:55,926 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 14:33:55,926 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:55,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:55,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1757221303, now seen corresponding path program 1 times [2025-03-03 14:33:55,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:55,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748116805] [2025-03-03 14:33:55,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:55,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:55,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:33:55,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:33:55,952 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:55,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:56,081 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 14:33:56,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:56,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748116805] [2025-03-03 14:33:56,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748116805] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:56,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421483373] [2025-03-03 14:33:56,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:56,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:56,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:56,084 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 14:33:56,085 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 14:33:56,113 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:33:56,135 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:33:56,136 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:56,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:56,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:33:56,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:56,239 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 14:33:56,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:56,917 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 14:33:56,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421483373] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:56,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:56,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-03-03 14:33:56,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969719771] [2025-03-03 14:33:56,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:56,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:33:56,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:56,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:33:56,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:33:56,919 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 14:33:57,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:57,431 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-03-03 14:33:57,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 14:33:57,431 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 14:33:57,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:57,433 INFO L225 Difference]: With dead ends: 177 [2025-03-03 14:33:57,433 INFO L226 Difference]: Without dead ends: 104 [2025-03-03 14:33:57,435 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 14:33:57,435 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 97 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:57,435 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 375 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 14:33:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-03 14:33:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-03-03 14:33:57,447 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 14:33:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-03-03 14:33:57,448 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2025-03-03 14:33:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:57,448 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-03-03 14:33:57,448 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 14:33:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-03-03 14:33:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-03-03 14:33:57,449 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:57,449 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:57,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 14:33:57,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:57,650 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:57,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash 830576147, now seen corresponding path program 1 times [2025-03-03 14:33:57,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:57,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138575215] [2025-03-03 14:33:57,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:57,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:57,655 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-03-03 14:33:57,664 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-03-03 14:33:57,664 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:57,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 42 proven. 136 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2025-03-03 14:33:57,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:57,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138575215] [2025-03-03 14:33:57,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138575215] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:57,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560170218] [2025-03-03 14:33:57,837 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:57,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:57,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:57,841 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:57,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 14:33:57,883 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-03-03 14:33:57,911 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-03-03 14:33:57,911 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:57,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:57,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:33:57,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 29 proven. 179 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2025-03-03 14:33:58,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 29 proven. 195 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2025-03-03 14:33:59,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560170218] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:59,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:59,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-03-03 14:33:59,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237279693] [2025-03-03 14:33:59,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:59,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:33:59,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:59,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:33:59,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:33:59,017 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 14:33:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:59,212 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-03-03 14:33:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:33:59,213 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 133 [2025-03-03 14:33:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:59,214 INFO L225 Difference]: With dead ends: 132 [2025-03-03 14:33:59,215 INFO L226 Difference]: Without dead ends: 128 [2025-03-03 14:33:59,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 250 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 14:33:59,217 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:59,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 214 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-03 14:33:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-03-03 14:33:59,226 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 14:33:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-03-03 14:33:59,228 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 133 [2025-03-03 14:33:59,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:59,228 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-03-03 14:33:59,228 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 14:33:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-03-03 14:33:59,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2025-03-03 14:33:59,231 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:59,231 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 23, 23, 21, 20, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:59,237 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 14:33:59,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:59,435 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:59,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:59,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1043998597, now seen corresponding path program 2 times [2025-03-03 14:33:59,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:59,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517240429] [2025-03-03 14:33:59,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:59,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:59,444 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 339 statements into 2 equivalence classes. [2025-03-03 14:33:59,468 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 339 of 339 statements. [2025-03-03 14:33:59,469 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:59,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 705 refuted. 0 times theorem prover too weak. 2438 trivial. 0 not checked. [2025-03-03 14:33:59,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:59,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517240429] [2025-03-03 14:33:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517240429] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475576957] [2025-03-03 14:33:59,794 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:59,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:59,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:59,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:59,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 14:33:59,853 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 339 statements into 2 equivalence classes. [2025-03-03 14:33:59,906 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 339 of 339 statements. [2025-03-03 14:33:59,906 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:59,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:59,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:33:59,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 705 refuted. 0 times theorem prover too weak. 2438 trivial. 0 not checked. [2025-03-03 14:33:59,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 729 refuted. 0 times theorem prover too weak. 2414 trivial. 0 not checked. [2025-03-03 14:34:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475576957] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:01,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:01,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 20 [2025-03-03 14:34:01,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301301019] [2025-03-03 14:34:01,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:01,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 14:34:01,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:01,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 14:34:01,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:34:01,450 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 14:34:01,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:01,641 INFO L93 Difference]: Finished difference Result 148 states and 283 transitions. [2025-03-03 14:34:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:01,641 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 339 [2025-03-03 14:34:01,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:01,643 INFO L225 Difference]: With dead ends: 148 [2025-03-03 14:34:01,643 INFO L226 Difference]: Without dead ends: 144 [2025-03-03 14:34:01,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 668 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 14:34:01,644 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:01,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 199 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-03 14:34:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2025-03-03 14:34:01,660 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 14:34:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2025-03-03 14:34:01,661 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 339 [2025-03-03 14:34:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:01,662 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2025-03-03 14:34:01,662 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 14:34:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2025-03-03 14:34:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2025-03-03 14:34:01,665 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:01,666 INFO L218 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 23, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:01,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 14:34:01,870 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 14:34:01,870 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:01,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:01,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1635968901, now seen corresponding path program 3 times [2025-03-03 14:34:01,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:01,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326392938] [2025-03-03 14:34:01,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:01,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:01,880 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 391 statements into 25 equivalence classes. [2025-03-03 14:34:01,896 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 391 statements. [2025-03-03 14:34:01,896 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 14:34:01,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 754 proven. 94 refuted. 0 times theorem prover too weak. 3500 trivial. 0 not checked. [2025-03-03 14:34:02,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:02,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326392938] [2025-03-03 14:34:02,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326392938] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:02,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276872553] [2025-03-03 14:34:02,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:02,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:02,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:02,087 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 14:34:02,089 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 14:34:02,160 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 391 statements into 25 equivalence classes. [2025-03-03 14:34:02,190 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 391 statements. [2025-03-03 14:34:02,190 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 14:34:02,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:02,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:34:02,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 592 proven. 102 refuted. 0 times theorem prover too weak. 3654 trivial. 0 not checked. [2025-03-03 14:34:02,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 594 proven. 112 refuted. 0 times theorem prover too weak. 3642 trivial. 0 not checked. [2025-03-03 14:34:03,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276872553] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:03,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:03,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 13] total 23 [2025-03-03 14:34:03,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975515328] [2025-03-03 14:34:03,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:03,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:34:03,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:03,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:34:03,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:03,318 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 13 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (28), 16 states have call predecessors, (28), 13 states have call successors, (28) [2025-03-03 14:34:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:03,835 INFO L93 Difference]: Finished difference Result 332 states and 732 transitions. [2025-03-03 14:34:03,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-03 14:34:03,836 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), 13 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (28), 16 states have call predecessors, (28), 13 states have call successors, (28) Word has length 391 [2025-03-03 14:34:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:03,839 INFO L225 Difference]: With dead ends: 332 [2025-03-03 14:34:03,839 INFO L226 Difference]: Without dead ends: 224 [2025-03-03 14:34:03,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 813 GetRequests, 769 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 14:34:03,841 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:03,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 389 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 14:34:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-03-03 14:34:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 181. [2025-03-03 14:34:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 121 states have internal predecessors, (144), 35 states have call successors, (35), 15 states have call predecessors, (35), 26 states have return successors, (148), 44 states have call predecessors, (148), 35 states have call successors, (148) [2025-03-03 14:34:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 327 transitions. [2025-03-03 14:34:03,858 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 327 transitions. Word has length 391 [2025-03-03 14:34:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:03,858 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 327 transitions. [2025-03-03 14:34:03,858 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), 13 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (28), 16 states have call predecessors, (28), 13 states have call successors, (28) [2025-03-03 14:34:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 327 transitions. [2025-03-03 14:34:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2025-03-03 14:34:03,861 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:03,861 INFO L218 NwaCegarLoop]: trace histogram [44, 44, 33, 33, 31, 25, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 15, 13, 8, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:03,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 14:34:04,062 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 14:34:04,062 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:04,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:04,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2139087390, now seen corresponding path program 4 times [2025-03-03 14:34:04,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:04,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839783223] [2025-03-03 14:34:04,062 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:04,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:04,074 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 522 statements into 2 equivalence classes. [2025-03-03 14:34:04,105 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 443 of 522 statements. [2025-03-03 14:34:04,105 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:04,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 193 proven. 1094 refuted. 0 times theorem prover too weak. 6778 trivial. 0 not checked. [2025-03-03 14:34:04,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:04,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839783223] [2025-03-03 14:34:04,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839783223] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:04,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591340396] [2025-03-03 14:34:04,417 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:04,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:04,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:04,419 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 14:34:04,437 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 14:34:04,518 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 522 statements into 2 equivalence classes. [2025-03-03 14:34:04,593 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 443 of 522 statements. [2025-03-03 14:34:04,593 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:04,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:04,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:04,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 175 proven. 1340 refuted. 0 times theorem prover too weak. 6550 trivial. 0 not checked. [2025-03-03 14:34:04,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 175 proven. 1373 refuted. 0 times theorem prover too weak. 6517 trivial. 0 not checked. [2025-03-03 14:34:06,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591340396] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:06,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:06,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 19] total 29 [2025-03-03 14:34:06,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503492810] [2025-03-03 14:34:06,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:06,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 14:34:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:06,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 14:34:06,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:34:06,995 INFO L87 Difference]: Start difference. First operand 181 states and 327 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (28), 1 states have call predecessors, (28), 16 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) [2025-03-03 14:34:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:07,335 INFO L93 Difference]: Finished difference Result 291 states and 757 transitions. [2025-03-03 14:34:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 14:34:07,335 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (28), 1 states have call predecessors, (28), 16 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) Word has length 522 [2025-03-03 14:34:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:07,340 INFO L225 Difference]: With dead ends: 291 [2025-03-03 14:34:07,341 INFO L226 Difference]: Without dead ends: 283 [2025-03-03 14:34:07,342 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 1024 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 14:34:07,342 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:07,342 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 225 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:07,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2025-03-03 14:34:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2025-03-03 14:34:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 150 states have internal predecessors, (173), 46 states have call successors, (46), 15 states have call predecessors, (46), 35 states have return successors, (285), 64 states have call predecessors, (285), 46 states have call successors, (285) [2025-03-03 14:34:07,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 504 transitions. [2025-03-03 14:34:07,381 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 504 transitions. Word has length 522 [2025-03-03 14:34:07,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:07,381 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 504 transitions. [2025-03-03 14:34:07,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (28), 1 states have call predecessors, (28), 16 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) [2025-03-03 14:34:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 504 transitions. [2025-03-03 14:34:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1074 [2025-03-03 14:34:07,395 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:07,395 INFO L218 NwaCegarLoop]: trace histogram [84, 84, 73, 73, 64, 63, 42, 42, 42, 42, 42, 42, 42, 36, 36, 36, 36, 36, 36, 36, 27, 22, 21, 9, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:07,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:07,595 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 14:34:07,596 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:07,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:07,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1284292332, now seen corresponding path program 5 times [2025-03-03 14:34:07,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:07,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301646745] [2025-03-03 14:34:07,600 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:07,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:07,621 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1073 statements into 63 equivalence classes. [2025-03-03 14:34:07,645 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 197 of 1073 statements. [2025-03-03 14:34:07,645 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-03 14:34:07,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 34389 backedges. 924 proven. 2330 refuted. 0 times theorem prover too weak. 31135 trivial. 0 not checked. [2025-03-03 14:34:07,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:07,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301646745] [2025-03-03 14:34:07,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301646745] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:07,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934359008] [2025-03-03 14:34:07,859 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:07,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:07,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:07,861 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 14:34:07,862 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 14:34:07,993 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1073 statements into 63 equivalence classes. [2025-03-03 14:34:08,024 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 197 of 1073 statements. [2025-03-03 14:34:08,025 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-03 14:34:08,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:08,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:08,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 34389 backedges. 13184 proven. 61 refuted. 0 times theorem prover too weak. 21144 trivial. 0 not checked. [2025-03-03 14:34:08,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 34389 backedges. 975 proven. 2576 refuted. 0 times theorem prover too weak. 30838 trivial. 0 not checked. [2025-03-03 14:34:10,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934359008] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:10,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:10,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 24 [2025-03-03 14:34:10,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482324130] [2025-03-03 14:34:10,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:10,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 14:34:10,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:10,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 14:34:10,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2025-03-03 14:34:10,607 INFO L87 Difference]: Start difference. First operand 230 states and 504 transitions. Second operand has 24 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 24 states have internal predecessors, (91), 18 states have call successors, (27), 2 states have call predecessors, (27), 8 states have return successors, (31), 8 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-03 14:34:10,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:10,881 INFO L93 Difference]: Finished difference Result 475 states and 1226 transitions. [2025-03-03 14:34:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 14:34:10,881 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 24 states have internal predecessors, (91), 18 states have call successors, (27), 2 states have call predecessors, (27), 8 states have return successors, (31), 8 states have call predecessors, (31), 18 states have call successors, (31) Word has length 1073 [2025-03-03 14:34:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:10,884 INFO L225 Difference]: With dead ends: 475 [2025-03-03 14:34:10,885 INFO L226 Difference]: Without dead ends: 241 [2025-03-03 14:34:10,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2174 GetRequests, 2131 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 14:34:10,888 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:10,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 179 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2025-03-03 14:34:10,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 221. [2025-03-03 14:34:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 144 states have internal predecessors, (174), 41 states have call successors, (41), 21 states have call predecessors, (41), 31 states have return successors, (221), 55 states have call predecessors, (221), 41 states have call successors, (221) [2025-03-03 14:34:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 436 transitions. [2025-03-03 14:34:10,906 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 436 transitions. Word has length 1073 [2025-03-03 14:34:10,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:10,907 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 436 transitions. [2025-03-03 14:34:10,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 24 states have internal predecessors, (91), 18 states have call successors, (27), 2 states have call predecessors, (27), 8 states have return successors, (31), 8 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-03 14:34:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 436 transitions. [2025-03-03 14:34:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1042 [2025-03-03 14:34:10,913 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:10,914 INFO L218 NwaCegarLoop]: trace histogram [80, 80, 73, 73, 62, 57, 40, 40, 40, 40, 40, 40, 40, 36, 36, 36, 36, 36, 36, 36, 26, 18, 17, 16, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:10,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 14:34:11,114 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 14:34:11,114 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:11,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:11,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1858327833, now seen corresponding path program 6 times [2025-03-03 14:34:11,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:11,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738755276] [2025-03-03 14:34:11,115 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:11,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:11,133 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1041 statements into 63 equivalence classes. [2025-03-03 14:34:11,222 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 449 of 1041 statements. [2025-03-03 14:34:11,222 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-03-03 14:34:11,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 32279 backedges. 976 proven. 2107 refuted. 0 times theorem prover too weak. 29196 trivial. 0 not checked. [2025-03-03 14:34:11,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:11,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738755276] [2025-03-03 14:34:11,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738755276] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:11,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501457494] [2025-03-03 14:34:11,501 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:11,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:11,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:11,503 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 14:34:11,506 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 14:34:11,657 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1041 statements into 63 equivalence classes. [2025-03-03 14:34:11,772 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 449 of 1041 statements. [2025-03-03 14:34:11,772 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-03-03 14:34:11,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:11,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:11,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 32279 backedges. 13457 proven. 88 refuted. 0 times theorem prover too weak. 18734 trivial. 0 not checked. [2025-03-03 14:34:11,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 32279 backedges. 1026 proven. 2316 refuted. 0 times theorem prover too weak. 28937 trivial. 0 not checked. [2025-03-03 14:34:14,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501457494] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:14,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:14,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 22 [2025-03-03 14:34:14,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825108707] [2025-03-03 14:34:14,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:14,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 14:34:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:14,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 14:34:14,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:34:14,376 INFO L87 Difference]: Start difference. First operand 221 states and 436 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 14:34:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:14,594 INFO L93 Difference]: Finished difference Result 434 states and 934 transitions. [2025-03-03 14:34:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:34:14,595 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 1041 [2025-03-03 14:34:14,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:14,599 INFO L225 Difference]: With dead ends: 434 [2025-03-03 14:34:14,599 INFO L226 Difference]: Without dead ends: 217 [2025-03-03 14:34:14,601 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2104 GetRequests, 2068 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 14:34:14,601 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:14,601 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 308 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2025-03-03 14:34:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 208. [2025-03-03 14:34:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 141 states have (on average 1.0921985815602837) internal successors, (154), 137 states have internal predecessors, (154), 38 states have call successors, (38), 21 states have call predecessors, (38), 28 states have return successors, (166), 49 states have call predecessors, (166), 38 states have call successors, (166) [2025-03-03 14:34:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 358 transitions. [2025-03-03 14:34:14,615 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 358 transitions. Word has length 1041 [2025-03-03 14:34:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:14,615 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 358 transitions. [2025-03-03 14:34:14,615 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 14:34:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 358 transitions. [2025-03-03 14:34:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2025-03-03 14:34:14,643 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:14,643 INFO L218 NwaCegarLoop]: trace histogram [74, 74, 67, 67, 62, 58, 37, 37, 37, 37, 37, 37, 37, 33, 33, 33, 33, 33, 33, 33, 25, 25, 16, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:14,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:14,848 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 14:34:14,848 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:14,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash 662551605, now seen corresponding path program 7 times [2025-03-03 14:34:14,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:14,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386846520] [2025-03-03 14:34:14,849 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:14,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:14,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 970 statements into 1 equivalence classes. [2025-03-03 14:34:14,941 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 970 of 970 statements. [2025-03-03 14:34:14,941 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:14,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 27968 backedges. 437 proven. 2894 refuted. 0 times theorem prover too weak. 24637 trivial. 0 not checked. [2025-03-03 14:34:15,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:15,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386846520] [2025-03-03 14:34:15,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386846520] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:15,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481756032] [2025-03-03 14:34:15,659 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:15,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:15,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:15,662 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 14:34:15,663 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 14:34:15,806 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 970 statements into 1 equivalence classes. [2025-03-03 14:34:15,952 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 970 of 970 statements. [2025-03-03 14:34:15,952 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:15,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:15,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 2171 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 14:34:15,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 27968 backedges. 437 proven. 2894 refuted. 0 times theorem prover too weak. 24637 trivial. 0 not checked. [2025-03-03 14:34:16,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 27968 backedges. 437 proven. 2938 refuted. 0 times theorem prover too weak. 24593 trivial. 0 not checked. [2025-03-03 14:34:19,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481756032] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:19,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:19,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 21] total 23 [2025-03-03 14:34:19,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273485203] [2025-03-03 14:34:19,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:19,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:34:19,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:19,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:34:19,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:19,507 INFO L87 Difference]: Start difference. First operand 208 states and 358 transitions. Second operand has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 states have internal predecessors, (80), 20 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (29), 10 states have call predecessors, (29), 20 states have call successors, (29) [2025-03-03 14:34:19,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:19,698 INFO L93 Difference]: Finished difference Result 279 states and 623 transitions. [2025-03-03 14:34:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:34:19,699 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 states have internal predecessors, (80), 20 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (29), 10 states have call predecessors, (29), 20 states have call successors, (29) Word has length 970 [2025-03-03 14:34:19,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:19,702 INFO L225 Difference]: With dead ends: 279 [2025-03-03 14:34:19,702 INFO L226 Difference]: Without dead ends: 273 [2025-03-03 14:34:19,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1928 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2025-03-03 14:34:19,704 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:19,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 203 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:19,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2025-03-03 14:34:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 236. [2025-03-03 14:34:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 158 states have (on average 1.0822784810126582) internal successors, (171), 154 states have internal predecessors, (171), 43 states have call successors, (43), 21 states have call predecessors, (43), 34 states have return successors, (240), 60 states have call predecessors, (240), 43 states have call successors, (240) [2025-03-03 14:34:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 454 transitions. [2025-03-03 14:34:19,723 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 454 transitions. Word has length 970 [2025-03-03 14:34:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:19,724 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 454 transitions. [2025-03-03 14:34:19,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 states have internal predecessors, (80), 20 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (29), 10 states have call predecessors, (29), 20 states have call successors, (29) [2025-03-03 14:34:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 454 transitions. [2025-03-03 14:34:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2025-03-03 14:34:19,730 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:19,730 INFO L218 NwaCegarLoop]: trace histogram [72, 72, 63, 63, 58, 55, 36, 36, 36, 36, 36, 36, 36, 31, 31, 31, 31, 31, 31, 31, 24, 22, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:19,738 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 14:34:19,931 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 14:34:19,931 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:19,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1344791338, now seen corresponding path program 8 times [2025-03-03 14:34:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:19,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104623564] [2025-03-03 14:34:19,932 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:19,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:19,948 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 927 statements into 2 equivalence classes. [2025-03-03 14:34:20,017 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 927 of 927 statements. [2025-03-03 14:34:20,017 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:20,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25554 backedges. 443 proven. 2675 refuted. 0 times theorem prover too weak. 22436 trivial. 0 not checked. [2025-03-03 14:34:20,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:20,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104623564] [2025-03-03 14:34:20,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104623564] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:20,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501752151] [2025-03-03 14:34:20,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:20,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:20,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:20,702 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 14:34:20,704 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 14:34:20,871 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 927 statements into 2 equivalence classes. [2025-03-03 14:34:20,996 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 927 of 927 statements. [2025-03-03 14:34:20,996 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:20,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:21,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 2076 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 14:34:21,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25554 backedges. 443 proven. 2675 refuted. 0 times theorem prover too weak. 22436 trivial. 0 not checked. [2025-03-03 14:34:21,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 25554 backedges. 443 proven. 2715 refuted. 0 times theorem prover too weak. 22396 trivial. 0 not checked. [2025-03-03 14:34:24,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501752151] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:24,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:24,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 21] total 23 [2025-03-03 14:34:24,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969322583] [2025-03-03 14:34:24,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:24,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:34:24,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:24,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:34:24,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:24,538 INFO L87 Difference]: Start difference. First operand 236 states and 454 transitions. Second operand has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 states have internal predecessors, (80), 19 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 12 states have call predecessors, (30), 19 states have call successors, (30) [2025-03-03 14:34:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:24,737 INFO L93 Difference]: Finished difference Result 369 states and 1069 transitions. [2025-03-03 14:34:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:34:24,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 states have internal predecessors, (80), 19 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 12 states have call predecessors, (30), 19 states have call successors, (30) Word has length 927 [2025-03-03 14:34:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:24,744 INFO L225 Difference]: With dead ends: 369 [2025-03-03 14:34:24,744 INFO L226 Difference]: Without dead ends: 363 [2025-03-03 14:34:24,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1881 GetRequests, 1842 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2025-03-03 14:34:24,746 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:24,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 198 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:24,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2025-03-03 14:34:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 258. [2025-03-03 14:34:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 171 states have (on average 1.0760233918128654) internal successors, (184), 167 states have internal predecessors, (184), 48 states have call successors, (48), 21 states have call predecessors, (48), 38 states have return successors, (320), 69 states have call predecessors, (320), 48 states have call successors, (320) [2025-03-03 14:34:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 552 transitions. [2025-03-03 14:34:24,777 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 552 transitions. Word has length 927 [2025-03-03 14:34:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:24,777 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 552 transitions. [2025-03-03 14:34:24,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 states have internal predecessors, (80), 19 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 12 states have call predecessors, (30), 19 states have call successors, (30) [2025-03-03 14:34:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 552 transitions. [2025-03-03 14:34:24,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2025-03-03 14:34:24,785 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:24,785 INFO L218 NwaCegarLoop]: trace histogram [80, 80, 65, 65, 61, 57, 40, 40, 40, 40, 40, 40, 40, 32, 32, 32, 32, 32, 32, 32, 29, 19, 17, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:24,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 14:34:24,985 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 14:34:24,986 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:24,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:24,986 INFO L85 PathProgramCache]: Analyzing trace with hash -135015082, now seen corresponding path program 9 times [2025-03-03 14:34:24,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:24,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078618793] [2025-03-03 14:34:24,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:24,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:25,001 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 992 statements into 62 equivalence classes. [2025-03-03 14:34:25,018 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 193 of 992 statements. [2025-03-03 14:34:25,018 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 14:34:25,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 29490 backedges. 2348 proven. 285 refuted. 0 times theorem prover too weak. 26857 trivial. 0 not checked. [2025-03-03 14:34:25,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:25,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078618793] [2025-03-03 14:34:25,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078618793] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:25,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658876042] [2025-03-03 14:34:25,199 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:25,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:25,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:25,201 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 14:34:25,202 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 14:34:25,383 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 992 statements into 62 equivalence classes. [2025-03-03 14:34:25,418 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 193 of 992 statements. [2025-03-03 14:34:25,418 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 14:34:25,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:25,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:34:25,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 29490 backedges. 7647 proven. 35 refuted. 0 times theorem prover too weak. 21808 trivial. 0 not checked. [2025-03-03 14:34:25,532 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 29490 backedges. 2276 proven. 270 refuted. 0 times theorem prover too weak. 26944 trivial. 0 not checked. [2025-03-03 14:34:27,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658876042] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:27,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:27,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 13] total 24 [2025-03-03 14:34:27,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242053827] [2025-03-03 14:34:27,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:27,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 14:34:27,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:27,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 14:34:27,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2025-03-03 14:34:27,590 INFO L87 Difference]: Start difference. First operand 258 states and 552 transitions. Second operand has 24 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 24 states have internal predecessors, (93), 16 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (31), 10 states have call predecessors, (31), 16 states have call successors, (31) [2025-03-03 14:34:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:27,831 INFO L93 Difference]: Finished difference Result 468 states and 1106 transitions. [2025-03-03 14:34:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 14:34:27,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 24 states have internal predecessors, (93), 16 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (31), 10 states have call predecessors, (31), 16 states have call successors, (31) Word has length 992 [2025-03-03 14:34:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:27,834 INFO L225 Difference]: With dead ends: 468 [2025-03-03 14:34:27,835 INFO L226 Difference]: Without dead ends: 215 [2025-03-03 14:34:27,837 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2012 GetRequests, 1970 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 14:34:27,838 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 45 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:27,838 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 294 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2025-03-03 14:34:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2025-03-03 14:34:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 145 states have (on average 1.0827586206896551) internal successors, (157), 140 states have internal predecessors, (157), 39 states have call successors, (39), 22 states have call predecessors, (39), 28 states have return successors, (160), 50 states have call predecessors, (160), 39 states have call successors, (160) [2025-03-03 14:34:27,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 356 transitions. [2025-03-03 14:34:27,852 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 356 transitions. Word has length 992 [2025-03-03 14:34:27,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:27,853 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 356 transitions. [2025-03-03 14:34:27,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 24 states have internal predecessors, (93), 16 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (31), 10 states have call predecessors, (31), 16 states have call successors, (31) [2025-03-03 14:34:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 356 transitions. [2025-03-03 14:34:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2971 [2025-03-03 14:34:27,909 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:27,910 INFO L218 NwaCegarLoop]: trace histogram [224, 224, 211, 211, 179, 177, 112, 112, 112, 112, 112, 112, 112, 105, 105, 105, 105, 105, 105, 105, 72, 67, 47, 32, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:27,917 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 14:34:28,110 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 14:34:28,111 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:28,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:28,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1059019880, now seen corresponding path program 10 times [2025-03-03 14:34:28,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:28,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822907895] [2025-03-03 14:34:28,112 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:28,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:28,150 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2970 statements into 2 equivalence classes. [2025-03-03 14:34:28,474 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2533 of 2970 statements. [2025-03-03 14:34:28,474 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:28,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 266735 backedges. 1382 proven. 8137 refuted. 0 times theorem prover too weak. 257216 trivial. 0 not checked. [2025-03-03 14:34:31,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:31,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822907895] [2025-03-03 14:34:31,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822907895] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:31,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169115355] [2025-03-03 14:34:31,973 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:31,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:31,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:31,975 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 14:34:31,975 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 14:34:32,249 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2970 statements into 2 equivalence classes. [2025-03-03 14:34:32,608 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2533 of 2970 statements. [2025-03-03 14:34:32,608 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:32,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:32,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 5286 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:32,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 266735 backedges. 1382 proven. 8137 refuted. 0 times theorem prover too weak. 257216 trivial. 0 not checked. [2025-03-03 14:34:32,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 266735 backedges. 1384 proven. 8168 refuted. 0 times theorem prover too weak. 257183 trivial. 0 not checked. [2025-03-03 14:34:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169115355] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:40,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:40,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 21 [2025-03-03 14:34:40,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298247063] [2025-03-03 14:34:40,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:40,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 14:34:40,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:40,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 14:34:40,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:34:40,110 INFO L87 Difference]: Start difference. First operand 213 states and 356 transitions. Second operand has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2025-03-03 14:34:40,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:40,326 INFO L93 Difference]: Finished difference Result 273 states and 576 transitions. [2025-03-03 14:34:40,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 14:34:40,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) Word has length 2970 [2025-03-03 14:34:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:40,333 INFO L225 Difference]: With dead ends: 273 [2025-03-03 14:34:40,333 INFO L226 Difference]: Without dead ends: 267 [2025-03-03 14:34:40,333 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5964 GetRequests, 5929 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:34:40,334 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:40,334 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 212 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:40,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2025-03-03 14:34:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 225. [2025-03-03 14:34:40,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 152 states have (on average 1.0789473684210527) internal successors, (164), 147 states have internal predecessors, (164), 42 states have call successors, (42), 22 states have call predecessors, (42), 30 states have return successors, (194), 55 states have call predecessors, (194), 42 states have call successors, (194) [2025-03-03 14:34:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 400 transitions. [2025-03-03 14:34:40,361 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 400 transitions. Word has length 2970 [2025-03-03 14:34:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:40,364 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 400 transitions. [2025-03-03 14:34:40,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2025-03-03 14:34:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 400 transitions. [2025-03-03 14:34:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1356 [2025-03-03 14:34:40,382 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:40,383 INFO L218 NwaCegarLoop]: trace histogram [105, 105, 92, 92, 89, 80, 52, 52, 52, 52, 52, 52, 52, 46, 46, 46, 46, 46, 46, 46, 43, 28, 16, 12, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:40,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-03 14:34:40,583 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 14:34:40,583 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:40,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:40,584 INFO L85 PathProgramCache]: Analyzing trace with hash 497401411, now seen corresponding path program 11 times [2025-03-03 14:34:40,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:40,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412676075] [2025-03-03 14:34:40,584 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:40,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:40,617 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1355 statements into 89 equivalence classes. [2025-03-03 14:34:40,623 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 130 of 1355 statements. [2025-03-03 14:34:40,623 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 14:34:40,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55104 backedges. 1176 proven. 3586 refuted. 0 times theorem prover too weak. 50342 trivial. 0 not checked. [2025-03-03 14:34:40,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:40,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412676075] [2025-03-03 14:34:40,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412676075] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:40,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433756893] [2025-03-03 14:34:40,753 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:40,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:40,755 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 14:34:40,756 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 14:34:41,000 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1355 statements into 89 equivalence classes. [2025-03-03 14:34:41,021 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 130 of 1355 statements. [2025-03-03 14:34:41,021 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 14:34:41,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:41,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:41,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 55104 backedges. 15041 proven. 71 refuted. 0 times theorem prover too weak. 39992 trivial. 0 not checked. [2025-03-03 14:34:41,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 55104 backedges. 1210 proven. 3936 refuted. 0 times theorem prover too weak. 49958 trivial. 0 not checked. [2025-03-03 14:34:44,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433756893] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:44,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:44,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 23 [2025-03-03 14:34:44,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252472184] [2025-03-03 14:34:44,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:44,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:34:44,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:44,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:34:44,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:44,446 INFO L87 Difference]: Start difference. First operand 225 states and 400 transitions. Second operand has 23 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 23 states have internal predecessors, (90), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (30), 8 states have call predecessors, (30), 15 states have call successors, (30) [2025-03-03 14:34:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:44,655 INFO L93 Difference]: Finished difference Result 449 states and 916 transitions. [2025-03-03 14:34:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 14:34:44,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 23 states have internal predecessors, (90), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (30), 8 states have call predecessors, (30), 15 states have call successors, (30) Word has length 1355 [2025-03-03 14:34:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:44,658 INFO L225 Difference]: With dead ends: 449 [2025-03-03 14:34:44,658 INFO L226 Difference]: Without dead ends: 230 [2025-03-03 14:34:44,660 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2734 GetRequests, 2695 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 14:34:44,660 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:44,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 279 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2025-03-03 14:34:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 225. [2025-03-03 14:34:44,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 152 states have (on average 1.0723684210526316) internal successors, (163), 147 states have internal predecessors, (163), 42 states have call successors, (42), 22 states have call predecessors, (42), 30 states have return successors, (183), 55 states have call predecessors, (183), 42 states have call successors, (183) [2025-03-03 14:34:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 388 transitions. [2025-03-03 14:34:44,675 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 388 transitions. Word has length 1355 [2025-03-03 14:34:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:44,675 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 388 transitions. [2025-03-03 14:34:44,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 23 states have internal predecessors, (90), 15 states have call successors, (25), 2 states have call predecessors, (25), 8 states have return successors, (30), 8 states have call predecessors, (30), 15 states have call successors, (30) [2025-03-03 14:34:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 388 transitions. [2025-03-03 14:34:44,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1061 [2025-03-03 14:34:44,681 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:44,682 INFO L218 NwaCegarLoop]: trace histogram [81, 81, 74, 74, 64, 62, 40, 40, 40, 40, 40, 40, 40, 37, 37, 37, 37, 37, 37, 37, 27, 22, 17, 12, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:44,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:44,882 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 14:34:44,883 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:44,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash -102961225, now seen corresponding path program 12 times [2025-03-03 14:34:44,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:44,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455488777] [2025-03-03 14:34:44,884 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:44,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:44,900 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1060 statements into 66 equivalence classes. [2025-03-03 14:34:44,970 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) and asserted 597 of 1060 statements. [2025-03-03 14:34:44,970 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2025-03-03 14:34:44,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 33455 backedges. 841 proven. 2974 refuted. 0 times theorem prover too weak. 29640 trivial. 0 not checked. [2025-03-03 14:34:45,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:45,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455488777] [2025-03-03 14:34:45,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455488777] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:45,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370931564] [2025-03-03 14:34:45,426 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:45,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:45,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:45,428 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 14:34:45,429 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 14:34:45,647 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1060 statements into 66 equivalence classes. [2025-03-03 14:34:45,754 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) and asserted 597 of 1060 statements. [2025-03-03 14:34:45,754 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2025-03-03 14:34:45,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:45,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:34:45,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 33455 backedges. 868 proven. 3195 refuted. 0 times theorem prover too weak. 29392 trivial. 0 not checked. [2025-03-03 14:34:45,830 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 33455 backedges. 872 proven. 3243 refuted. 0 times theorem prover too weak. 29340 trivial. 0 not checked. [2025-03-03 14:34:50,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370931564] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:50,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:50,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 23] total 28 [2025-03-03 14:34:50,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933611982] [2025-03-03 14:34:50,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:50,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 14:34:50,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:50,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 14:34:50,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:34:50,034 INFO L87 Difference]: Start difference. First operand 225 states and 388 transitions. Second operand has 28 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) [2025-03-03 14:34:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:50,306 INFO L93 Difference]: Finished difference Result 366 states and 1033 transitions. [2025-03-03 14:34:50,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:34:50,307 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) Word has length 1060 [2025-03-03 14:34:50,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:50,309 INFO L225 Difference]: With dead ends: 366 [2025-03-03 14:34:50,309 INFO L226 Difference]: Without dead ends: 228 [2025-03-03 14:34:50,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2151 GetRequests, 2104 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 14:34:50,312 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 27 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:50,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 519 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-03-03 14:34:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 197. [2025-03-03 14:34:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 135 states have (on average 1.0814814814814815) internal successors, (146), 130 states have internal predecessors, (146), 37 states have call successors, (37), 22 states have call predecessors, (37), 24 states have return successors, (103), 44 states have call predecessors, (103), 37 states have call successors, (103) [2025-03-03 14:34:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 286 transitions. [2025-03-03 14:34:50,326 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 286 transitions. Word has length 1060 [2025-03-03 14:34:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:50,327 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 286 transitions. [2025-03-03 14:34:50,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) [2025-03-03 14:34:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 286 transitions. [2025-03-03 14:34:50,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1686 [2025-03-03 14:34:50,339 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:50,339 INFO L218 NwaCegarLoop]: trace histogram [125, 125, 122, 122, 100, 99, 62, 62, 62, 62, 62, 62, 62, 61, 61, 61, 61, 61, 61, 61, 38, 38, 26, 22, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:50,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:50,539 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 14:34:50,540 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:50,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1827999351, now seen corresponding path program 13 times [2025-03-03 14:34:50,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:50,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560643842] [2025-03-03 14:34:50,541 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:50,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:50,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1685 statements into 1 equivalence classes. [2025-03-03 14:34:50,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1685 of 1685 statements. [2025-03-03 14:34:50,701 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:50,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 85209 backedges. 938 proven. 4365 refuted. 0 times theorem prover too weak. 79906 trivial. 0 not checked. [2025-03-03 14:34:52,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:52,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560643842] [2025-03-03 14:34:52,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560643842] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:52,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606103230] [2025-03-03 14:34:52,112 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:52,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:52,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:52,114 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 14:34:52,115 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 14:34:52,407 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1685 statements into 1 equivalence classes. [2025-03-03 14:34:52,643 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1685 of 1685 statements. [2025-03-03 14:34:52,643 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:52,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:52,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 3760 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:52,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 85209 backedges. 938 proven. 4365 refuted. 0 times theorem prover too weak. 79906 trivial. 0 not checked. [2025-03-03 14:34:52,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 85209 backedges. 940 proven. 4396 refuted. 0 times theorem prover too weak. 79873 trivial. 0 not checked. [2025-03-03 14:34:56,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606103230] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:56,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:56,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 21 [2025-03-03 14:34:56,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832045456] [2025-03-03 14:34:56,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:56,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 14:34:56,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:56,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 14:34:56,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:34:56,947 INFO L87 Difference]: Start difference. First operand 197 states and 286 transitions. Second operand has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2025-03-03 14:34:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:57,114 INFO L93 Difference]: Finished difference Result 256 states and 434 transitions. [2025-03-03 14:34:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 14:34:57,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) Word has length 1685 [2025-03-03 14:34:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:57,118 INFO L225 Difference]: With dead ends: 256 [2025-03-03 14:34:57,118 INFO L226 Difference]: Without dead ends: 247 [2025-03-03 14:34:57,119 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3394 GetRequests, 3359 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:34:57,119 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:57,120 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 224 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2025-03-03 14:34:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 195. [2025-03-03 14:34:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 134 states have (on average 1.0820895522388059) internal successors, (145), 129 states have internal predecessors, (145), 36 states have call successors, (36), 22 states have call predecessors, (36), 24 states have return successors, (94), 43 states have call predecessors, (94), 36 states have call successors, (94) [2025-03-03 14:34:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 275 transitions. [2025-03-03 14:34:57,141 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 275 transitions. Word has length 1685 [2025-03-03 14:34:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:57,142 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 275 transitions. [2025-03-03 14:34:57,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2025-03-03 14:34:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 275 transitions. [2025-03-03 14:34:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1238 [2025-03-03 14:34:57,157 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:57,158 INFO L218 NwaCegarLoop]: trace histogram [95, 95, 86, 86, 75, 72, 47, 47, 47, 47, 47, 47, 47, 43, 43, 43, 43, 43, 43, 43, 32, 25, 20, 14, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:57,168 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 14:34:57,358 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 14:34:57,358 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:57,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash -62317947, now seen corresponding path program 14 times [2025-03-03 14:34:57,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:57,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737670863] [2025-03-03 14:34:57,359 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:57,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:57,391 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1237 statements into 2 equivalence classes. [2025-03-03 14:34:57,498 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1237 of 1237 statements. [2025-03-03 14:34:57,498 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:57,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 45747 backedges. 1191 proven. 2644 refuted. 0 times theorem prover too weak. 41912 trivial. 0 not checked. [2025-03-03 14:34:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:58,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737670863] [2025-03-03 14:34:58,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737670863] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:58,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576774541] [2025-03-03 14:34:58,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:58,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:58,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:58,490 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 14:34:58,491 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 14:34:58,783 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1237 statements into 2 equivalence classes. [2025-03-03 14:34:58,939 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1237 of 1237 statements. [2025-03-03 14:34:58,939 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:58,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:58,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 2765 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:34:58,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 45747 backedges. 1108 proven. 3682 refuted. 0 times theorem prover too weak. 40957 trivial. 0 not checked. [2025-03-03 14:34:59,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 45747 backedges. 1110 proven. 3732 refuted. 0 times theorem prover too weak. 40905 trivial. 0 not checked. [2025-03-03 14:35:03,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576774541] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:03,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:03,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 23] total 36 [2025-03-03 14:35:03,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734539863] [2025-03-03 14:35:03,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:03,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-03 14:35:03,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:03,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-03 14:35:03,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 14:35:03,744 INFO L87 Difference]: Start difference. First operand 195 states and 275 transitions. Second operand has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 36 states have internal predecessors, (117), 30 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (48), 21 states have call predecessors, (48), 30 states have call successors, (48) [2025-03-03 14:35:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:05,032 INFO L93 Difference]: Finished difference Result 580 states and 1221 transitions. [2025-03-03 14:35:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2025-03-03 14:35:05,033 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 36 states have internal predecessors, (117), 30 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (48), 21 states have call predecessors, (48), 30 states have call successors, (48) Word has length 1237 [2025-03-03 14:35:05,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:05,036 INFO L225 Difference]: With dead ends: 580 [2025-03-03 14:35:05,036 INFO L226 Difference]: Without dead ends: 311 [2025-03-03 14:35:05,040 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2539 GetRequests, 2446 SyntacticMatches, 11 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=890, Invalid=6082, Unknown=0, NotChecked=0, Total=6972 [2025-03-03 14:35:05,041 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 147 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 2098 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:05,041 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 1042 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2098 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 14:35:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2025-03-03 14:35:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 248. [2025-03-03 14:35:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 170 states have (on average 1.0647058823529412) internal successors, (181), 168 states have internal predecessors, (181), 51 states have call successors, (51), 32 states have call predecessors, (51), 26 states have return successors, (153), 47 states have call predecessors, (153), 51 states have call successors, (153) [2025-03-03 14:35:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 385 transitions. [2025-03-03 14:35:05,059 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 385 transitions. Word has length 1237 [2025-03-03 14:35:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:05,060 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 385 transitions. [2025-03-03 14:35:05,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 36 states have internal predecessors, (117), 30 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (48), 21 states have call predecessors, (48), 30 states have call successors, (48) [2025-03-03 14:35:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 385 transitions. [2025-03-03 14:35:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1346 [2025-03-03 14:35:05,068 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:05,068 INFO L218 NwaCegarLoop]: trace histogram [99, 99, 98, 98, 80, 79, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 31, 30, 20, 18, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:05,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:05,269 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 14:35:05,269 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:05,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:05,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1325461217, now seen corresponding path program 15 times [2025-03-03 14:35:05,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:05,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549174967] [2025-03-03 14:35:05,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:05,291 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1345 statements into 92 equivalence classes. [2025-03-03 14:35:05,319 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) and asserted 449 of 1345 statements. [2025-03-03 14:35:05,319 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2025-03-03 14:35:05,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 54065 backedges. 3632 proven. 618 refuted. 0 times theorem prover too weak. 49815 trivial. 0 not checked. [2025-03-03 14:35:05,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549174967] [2025-03-03 14:35:05,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549174967] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70221576] [2025-03-03 14:35:05,697 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:05,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:05,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:05,701 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 14:35:05,702 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 14:35:06,020 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1345 statements into 92 equivalence classes. [2025-03-03 14:35:06,105 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) and asserted 449 of 1345 statements. [2025-03-03 14:35:06,105 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2025-03-03 14:35:06,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:06,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:35:06,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 54065 backedges. 15774 proven. 146 refuted. 0 times theorem prover too weak. 38145 trivial. 0 not checked. [2025-03-03 14:35:06,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 54065 backedges. 3918 proven. 692 refuted. 0 times theorem prover too weak. 49455 trivial. 0 not checked. [2025-03-03 14:35:09,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70221576] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:09,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:09,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 17] total 28 [2025-03-03 14:35:09,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936186519] [2025-03-03 14:35:09,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:09,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 14:35:09,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:09,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 14:35:09,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:35:09,381 INFO L87 Difference]: Start difference. First operand 248 states and 385 transitions. Second operand has 28 states, 27 states have (on average 3.740740740740741) internal successors, (101), 28 states have internal predecessors, (101), 17 states have call successors, (32), 2 states have call predecessors, (32), 9 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) [2025-03-03 14:35:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:09,631 INFO L93 Difference]: Finished difference Result 539 states and 888 transitions. [2025-03-03 14:35:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 14:35:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.740740740740741) internal successors, (101), 28 states have internal predecessors, (101), 17 states have call successors, (32), 2 states have call predecessors, (32), 9 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) Word has length 1345 [2025-03-03 14:35:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:09,634 INFO L225 Difference]: With dead ends: 539 [2025-03-03 14:35:09,634 INFO L226 Difference]: Without dead ends: 302 [2025-03-03 14:35:09,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2719 GetRequests, 2674 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 14:35:09,636 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 44 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:09,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 292 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:35:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2025-03-03 14:35:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 271. [2025-03-03 14:35:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 186 states have (on average 1.0591397849462365) internal successors, (197), 183 states have internal predecessors, (197), 58 states have call successors, (58), 36 states have call predecessors, (58), 26 states have return successors, (163), 51 states have call predecessors, (163), 58 states have call successors, (163) [2025-03-03 14:35:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 418 transitions. [2025-03-03 14:35:09,654 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 418 transitions. Word has length 1345 [2025-03-03 14:35:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:09,654 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 418 transitions. [2025-03-03 14:35:09,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.740740740740741) internal successors, (101), 28 states have internal predecessors, (101), 17 states have call successors, (32), 2 states have call predecessors, (32), 9 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) [2025-03-03 14:35:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 418 transitions. [2025-03-03 14:35:09,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1156 [2025-03-03 14:35:09,661 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:09,661 INFO L218 NwaCegarLoop]: trace histogram [86, 86, 83, 83, 70, 67, 43, 43, 43, 43, 43, 43, 43, 41, 41, 41, 41, 41, 41, 41, 29, 24, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:09,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-03 14:35:09,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-03 14:35:09,862 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:09,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:09,862 INFO L85 PathProgramCache]: Analyzing trace with hash 316644805, now seen corresponding path program 16 times [2025-03-03 14:35:09,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:09,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961097335] [2025-03-03 14:35:09,862 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:09,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:09,881 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1155 statements into 2 equivalence classes. [2025-03-03 14:35:09,930 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 984 of 1155 statements. [2025-03-03 14:35:09,930 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:09,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39750 backedges. 1372 proven. 1302 refuted. 0 times theorem prover too weak. 37076 trivial. 0 not checked. [2025-03-03 14:35:10,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:10,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961097335] [2025-03-03 14:35:10,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961097335] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:10,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115666972] [2025-03-03 14:35:10,370 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:10,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:10,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:10,371 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:10,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-03 14:35:10,685 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1155 statements into 2 equivalence classes. [2025-03-03 14:35:10,804 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 984 of 1155 statements. [2025-03-03 14:35:10,804 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:10,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:10,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 14:35:10,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 39750 backedges. 1492 proven. 2524 refuted. 0 times theorem prover too weak. 35734 trivial. 0 not checked. [2025-03-03 14:35:10,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 39750 backedges. 1496 proven. 2560 refuted. 0 times theorem prover too weak. 35694 trivial. 0 not checked. [2025-03-03 14:35:14,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115666972] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:14,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:14,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 21] total 32 [2025-03-03 14:35:14,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183234484] [2025-03-03 14:35:14,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:14,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 14:35:14,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:14,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 14:35:14,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2025-03-03 14:35:14,761 INFO L87 Difference]: Start difference. First operand 271 states and 418 transitions. Second operand has 32 states, 30 states have (on average 3.5) internal successors, (105), 32 states have internal predecessors, (105), 23 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (41), 21 states have call predecessors, (41), 23 states have call successors, (41) [2025-03-03 14:35:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:15,751 INFO L93 Difference]: Finished difference Result 772 states and 1475 transitions. [2025-03-03 14:35:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2025-03-03 14:35:15,752 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), 23 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (41), 21 states have call predecessors, (41), 23 states have call successors, (41) Word has length 1155 [2025-03-03 14:35:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:15,756 INFO L225 Difference]: With dead ends: 772 [2025-03-03 14:35:15,756 INFO L226 Difference]: Without dead ends: 402 [2025-03-03 14:35:15,759 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2367 GetRequests, 2283 SyntacticMatches, 10 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=755, Invalid=4945, Unknown=0, NotChecked=0, Total=5700 [2025-03-03 14:35:15,760 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 134 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:15,760 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 780 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 14:35:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2025-03-03 14:35:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 330. [2025-03-03 14:35:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 232 states have (on average 1.0517241379310345) internal successors, (244), 227 states have internal predecessors, (244), 72 states have call successors, (72), 52 states have call predecessors, (72), 25 states have return successors, (225), 50 states have call predecessors, (225), 72 states have call successors, (225) [2025-03-03 14:35:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 541 transitions. [2025-03-03 14:35:15,783 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 541 transitions. Word has length 1155 [2025-03-03 14:35:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:15,784 INFO L471 AbstractCegarLoop]: Abstraction has 330 states and 541 transitions. [2025-03-03 14:35:15,784 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), 23 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (41), 21 states have call predecessors, (41), 23 states have call successors, (41) [2025-03-03 14:35:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 541 transitions. [2025-03-03 14:35:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1606 [2025-03-03 14:35:15,795 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:15,795 INFO L218 NwaCegarLoop]: trace histogram [122, 122, 113, 113, 98, 93, 61, 61, 61, 61, 61, 61, 61, 56, 56, 56, 56, 56, 56, 56, 42, 32, 24, 20, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:15,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-03 14:35:15,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:15,996 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:15,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash -274138233, now seen corresponding path program 17 times [2025-03-03 14:35:15,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:15,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390032450] [2025-03-03 14:35:15,998 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:15,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:16,024 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1605 statements into 104 equivalence classes. [2025-03-03 14:35:16,041 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) and asserted 329 of 1605 statements. [2025-03-03 14:35:16,042 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2025-03-03 14:35:16,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 77347 backedges. 1585 proven. 4047 refuted. 0 times theorem prover too weak. 71715 trivial. 0 not checked. [2025-03-03 14:35:16,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:16,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390032450] [2025-03-03 14:35:16,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390032450] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:16,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236274360] [2025-03-03 14:35:16,244 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:16,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:16,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:16,246 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:16,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-03 14:35:16,623 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1605 statements into 104 equivalence classes. [2025-03-03 14:35:16,673 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) and asserted 329 of 1605 statements. [2025-03-03 14:35:16,673 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2025-03-03 14:35:16,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:16,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:35:16,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 77347 backedges. 31601 proven. 142 refuted. 0 times theorem prover too weak. 45604 trivial. 0 not checked. [2025-03-03 14:35:16,738 INFO L312 TraceCheckSpWp]: Computing backward predicates...