./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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/nla-digbench-scaling/egcd2-ll_unwindbound50.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 deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:09:24,100 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:09:24,154 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:09:24,159 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:09:24,159 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:09:24,182 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:09:24,183 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:09:24,183 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:09:24,183 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:09:24,184 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:09:24,184 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:09:24,184 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:09:24,184 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:09:24,184 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:09:24,184 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:09:24,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:09:24,185 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:09:24,185 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:09:24,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:09:24,185 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:09:24,185 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:09:24,185 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:09:24,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:09:24,186 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:09:24,186 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:09:24,186 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:09:24,186 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:09:24,186 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:09:24,186 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:09:24,186 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:09:24,186 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:09:24,186 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:09:24,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:09:24,186 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:09:24,187 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:09:24,187 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:09:24,187 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:09:24,187 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:09:24,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:09:24,187 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:09:24,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:09:24,187 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:09:24,188 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:09:24,188 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 -> deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 [2025-03-16 18:09:24,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:09:24,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:09:24,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:09:24,429 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:09:24,429 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:09:24,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2025-03-16 18:09:25,579 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a12f08c/45e2320377fd461394a94ca5b8764811/FLAG3465d3433 [2025-03-16 18:09:25,793 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:09:25,794 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2025-03-16 18:09:25,800 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a12f08c/45e2320377fd461394a94ca5b8764811/FLAG3465d3433 [2025-03-16 18:09:26,155 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a12f08c/45e2320377fd461394a94ca5b8764811 [2025-03-16 18:09:26,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:09:26,158 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:09:26,159 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:09:26,159 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:09:26,162 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:09:26,162 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15df9ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26, skipping insertion in model container [2025-03-16 18:09:26,163 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,174 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:09:26,258 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/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2025-03-16 18:09:26,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:09:26,282 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:09:26,289 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/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2025-03-16 18:09:26,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:09:26,307 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:09:26,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26 WrapperNode [2025-03-16 18:09:26,309 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:09:26,310 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:09:26,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:09:26,311 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:09:26,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,323 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,333 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2025-03-16 18:09:26,334 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:09:26,335 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:09:26,335 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:09:26,335 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:09:26,340 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,341 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,351 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]. [2025-03-16 18:09:26,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,352 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,355 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,357 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,358 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,358 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:09:26,363 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:09:26,363 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:09:26,363 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:09:26,363 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (1/1) ... [2025-03-16 18:09:26,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:09:26,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:26,388 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) [2025-03-16 18:09:26,392 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 [2025-03-16 18:09:26,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:09:26,407 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-16 18:09:26,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-16 18:09:26,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:09:26,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:09:26,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:09:26,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 18:09:26,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 18:09:26,454 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:09:26,455 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:09:26,558 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-16 18:09:26,558 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:09:26,563 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:09:26,564 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:09:26,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:09:26 BoogieIcfgContainer [2025-03-16 18:09:26,565 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:09:26,566 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:09:26,566 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:09:26,569 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:09:26,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:09:26" (1/3) ... [2025-03-16 18:09:26,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6ddeba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:09:26, skipping insertion in model container [2025-03-16 18:09:26,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:26" (2/3) ... [2025-03-16 18:09:26,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6ddeba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:09:26, skipping insertion in model container [2025-03-16 18:09:26,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:09:26" (3/3) ... [2025-03-16 18:09:26,572 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.c [2025-03-16 18:09:26,581 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:09:26,582 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_unwindbound50.c that has 3 procedures, 32 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 18:09:26,616 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:09:26,625 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;@13799f5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:09:26,625 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:09:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 18:09:26,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 18:09:26,632 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:26,633 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:26,633 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:26,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:26,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1447899124, now seen corresponding path program 1 times [2025-03-16 18:09:26,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:26,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670386417] [2025-03-16 18:09:26,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:26,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:26,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-16 18:09:26,719 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 18:09:26,719 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:26,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 18:09:26,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:26,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670386417] [2025-03-16 18:09:26,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670386417] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:26,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:09:26,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 18:09:26,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202376970] [2025-03-16 18:09:26,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:26,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 18:09:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:26,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 18:09:26,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:09:26,791 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:09:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:26,803 INFO L93 Difference]: Finished difference Result 62 states and 101 transitions. [2025-03-16 18:09:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 18:09:26,804 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2025-03-16 18:09:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:26,807 INFO L225 Difference]: With dead ends: 62 [2025-03-16 18:09:26,807 INFO L226 Difference]: Without dead ends: 29 [2025-03-16 18:09:26,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:09:26,810 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:26,811 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-16 18:09:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-03-16 18:09:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-16 18:09:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2025-03-16 18:09:26,832 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 27 [2025-03-16 18:09:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:26,832 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2025-03-16 18:09:26,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:09:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2025-03-16 18:09:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-16 18:09:26,833 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:26,833 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:26,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 18:09:26,834 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:26,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:26,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1886374424, now seen corresponding path program 1 times [2025-03-16 18:09:26,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:26,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367125603] [2025-03-16 18:09:26,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:26,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:26,842 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-16 18:09:26,852 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 18:09:26,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:26,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 18:09:26,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:26,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367125603] [2025-03-16 18:09:26,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367125603] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:26,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:09:26,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 18:09:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103235237] [2025-03-16 18:09:26,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:26,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 18:09:26,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:26,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 18:09:26,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:09:26,940 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:09:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:26,964 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2025-03-16 18:09:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 18:09:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2025-03-16 18:09:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:26,965 INFO L225 Difference]: With dead ends: 39 [2025-03-16 18:09:26,966 INFO L226 Difference]: Without dead ends: 31 [2025-03-16 18:09:26,966 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:09:26,966 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:26,966 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 98 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-16 18:09:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-03-16 18:09:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-16 18:09:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2025-03-16 18:09:26,971 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 28 [2025-03-16 18:09:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:26,971 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2025-03-16 18:09:26,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:09:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2025-03-16 18:09:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-16 18:09:26,972 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:26,972 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:26,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 18:09:26,972 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:26,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:26,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1704454544, now seen corresponding path program 1 times [2025-03-16 18:09:26,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:26,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175706483] [2025-03-16 18:09:26,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:26,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:26,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-16 18:09:27,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 18:09:27,000 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:27,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 18:09:27,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:27,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175706483] [2025-03-16 18:09:27,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175706483] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:27,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950900694] [2025-03-16 18:09:27,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:27,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:27,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:27,136 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) [2025-03-16 18:09:27,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 18:09:27,172 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-16 18:09:27,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 18:09:27,185 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:27,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:27,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 18:09:27,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 18:09:27,321 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:09:27,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950900694] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:27,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:27,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2025-03-16 18:09:27,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815787226] [2025-03-16 18:09:27,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:27,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:09:27,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:27,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:09:27,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:09:27,324 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 18:09:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:27,411 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2025-03-16 18:09:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:09:27,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2025-03-16 18:09:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:27,413 INFO L225 Difference]: With dead ends: 48 [2025-03-16 18:09:27,413 INFO L226 Difference]: Without dead ends: 46 [2025-03-16 18:09:27,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:09:27,413 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:27,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-16 18:09:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2025-03-16 18:09:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.32) internal successors, (33), 27 states have internal predecessors, (33), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 18:09:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2025-03-16 18:09:27,422 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 29 [2025-03-16 18:09:27,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:27,422 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2025-03-16 18:09:27,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 18:09:27,422 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2025-03-16 18:09:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 18:09:27,422 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:27,423 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:27,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 18:09:27,627 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 [2025-03-16 18:09:27,627 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:27,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:27,627 INFO L85 PathProgramCache]: Analyzing trace with hash -678028952, now seen corresponding path program 1 times [2025-03-16 18:09:27,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:27,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074675984] [2025-03-16 18:09:27,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:27,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:27,632 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-16 18:09:27,639 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 18:09:27,640 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:27,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:27,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488617823] [2025-03-16 18:09:27,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:27,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:27,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:27,643 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) [2025-03-16 18:09:27,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 18:09:27,676 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-16 18:09:27,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 18:09:27,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:27,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:27,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:09:27,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 18:09:27,724 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:09:27,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:27,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074675984] [2025-03-16 18:09:27,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:27,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488617823] [2025-03-16 18:09:27,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488617823] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:27,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:09:27,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:09:27,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046480701] [2025-03-16 18:09:27,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:27,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:09:27,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:27,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:09:27,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:09:27,726 INFO L87 Difference]: Start difference. First operand 44 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:09:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:27,768 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2025-03-16 18:09:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:09:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2025-03-16 18:09:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:27,771 INFO L225 Difference]: With dead ends: 65 [2025-03-16 18:09:27,771 INFO L226 Difference]: Without dead ends: 63 [2025-03-16 18:09:27,772 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:09:27,772 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:27,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-16 18:09:27,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2025-03-16 18:09:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.3125) internal successors, (42), 36 states have internal predecessors, (42), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-16 18:09:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2025-03-16 18:09:27,785 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 31 [2025-03-16 18:09:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:27,785 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2025-03-16 18:09:27,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:09:27,785 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2025-03-16 18:09:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 18:09:27,786 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:27,786 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:27,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 18:09:27,986 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 [2025-03-16 18:09:27,986 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:27,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash 781013430, now seen corresponding path program 1 times [2025-03-16 18:09:27,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:27,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624363348] [2025-03-16 18:09:27,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:27,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:27,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 18:09:27,998 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 18:09:27,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:27,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 18:09:28,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:28,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624363348] [2025-03-16 18:09:28,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624363348] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:28,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324540908] [2025-03-16 18:09:28,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:28,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:28,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:28,092 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) [2025-03-16 18:09:28,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 18:09:28,119 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 18:09:28,131 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 18:09:28,131 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:28,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:28,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:09:28,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 18:09:28,203 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:09:28,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324540908] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:28,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:28,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2025-03-16 18:09:28,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154270874] [2025-03-16 18:09:28,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:28,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:09:28,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:28,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:09:28,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:09:28,204 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 18:09:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:28,257 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2025-03-16 18:09:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:09:28,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2025-03-16 18:09:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:28,260 INFO L225 Difference]: With dead ends: 62 [2025-03-16 18:09:28,261 INFO L226 Difference]: Without dead ends: 58 [2025-03-16 18:09:28,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:09:28,261 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:28,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:28,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-16 18:09:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2025-03-16 18:09:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-16 18:09:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2025-03-16 18:09:28,274 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 34 [2025-03-16 18:09:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:28,274 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2025-03-16 18:09:28,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 18:09:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2025-03-16 18:09:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 18:09:28,276 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:28,276 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:28,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:28,476 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 [2025-03-16 18:09:28,477 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:28,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:28,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1661765959, now seen corresponding path program 1 times [2025-03-16 18:09:28,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:28,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470025090] [2025-03-16 18:09:28,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:28,482 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 18:09:28,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 18:09:28,486 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:28,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 18:09:28,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:28,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470025090] [2025-03-16 18:09:28,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470025090] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:28,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:09:28,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:09:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894671385] [2025-03-16 18:09:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:28,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:09:28,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:28,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:09:28,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:09:28,537 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:09:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:28,556 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2025-03-16 18:09:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:09:28,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2025-03-16 18:09:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:28,558 INFO L225 Difference]: With dead ends: 83 [2025-03-16 18:09:28,558 INFO L226 Difference]: Without dead ends: 57 [2025-03-16 18:09:28,558 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:09:28,559 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:28,560 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 98 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-03-16 18:09:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2025-03-16 18:09:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 38 states have internal predecessors, (43), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-16 18:09:28,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2025-03-16 18:09:28,572 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 34 [2025-03-16 18:09:28,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:28,572 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2025-03-16 18:09:28,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:09:28,573 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2025-03-16 18:09:28,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 18:09:28,574 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:28,575 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:28,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-16 18:09:28,575 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:28,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:28,575 INFO L85 PathProgramCache]: Analyzing trace with hash 536628030, now seen corresponding path program 1 times [2025-03-16 18:09:28,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:28,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093494463] [2025-03-16 18:09:28,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:28,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:28,581 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 18:09:28,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 18:09:28,593 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:28,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:28,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526590925] [2025-03-16 18:09:28,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:28,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:28,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:28,596 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) [2025-03-16 18:09:28,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 18:09:28,620 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 18:09:28,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 18:09:28,634 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:28,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:28,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 18:09:28,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-16 18:09:28,764 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:09:28,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:28,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093494463] [2025-03-16 18:09:28,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:28,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526590925] [2025-03-16 18:09:28,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526590925] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:28,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:09:28,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:09:28,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336972797] [2025-03-16 18:09:28,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:28,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:09:28,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:28,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:09:28,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:09:28,767 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 18:09:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:28,815 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2025-03-16 18:09:28,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:09:28,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2025-03-16 18:09:28,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:28,816 INFO L225 Difference]: With dead ends: 64 [2025-03-16 18:09:28,816 INFO L226 Difference]: Without dead ends: 62 [2025-03-16 18:09:28,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:09:28,817 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:28,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 126 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-16 18:09:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2025-03-16 18:09:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-16 18:09:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2025-03-16 18:09:28,826 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 46 [2025-03-16 18:09:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:28,826 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2025-03-16 18:09:28,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 18:09:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2025-03-16 18:09:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 18:09:28,827 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:28,827 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2025-03-16 18:09:28,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:29,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:29,034 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:29,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash -740965909, now seen corresponding path program 1 times [2025-03-16 18:09:29,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:29,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170291859] [2025-03-16 18:09:29,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:29,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:29,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-16 18:09:29,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 18:09:29,054 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:29,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:29,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668101497] [2025-03-16 18:09:29,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:29,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:29,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:29,057 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) [2025-03-16 18:09:29,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 18:09:29,083 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-16 18:09:29,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 18:09:29,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:29,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:29,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 18:09:29,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 18:09:29,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 18:09:29,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:29,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170291859] [2025-03-16 18:09:29,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:29,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668101497] [2025-03-16 18:09:29,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668101497] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:29,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:09:29,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-03-16 18:09:29,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109896565] [2025-03-16 18:09:29,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:29,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 18:09:29,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:29,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 18:09:29,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:09:29,270 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 18:09:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:29,352 INFO L93 Difference]: Finished difference Result 91 states and 126 transitions. [2025-03-16 18:09:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 18:09:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2025-03-16 18:09:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:29,355 INFO L225 Difference]: With dead ends: 91 [2025-03-16 18:09:29,356 INFO L226 Difference]: Without dead ends: 89 [2025-03-16 18:09:29,356 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:09:29,357 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:29,357 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 156 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:29,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-16 18:09:29,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2025-03-16 18:09:29,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-16 18:09:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2025-03-16 18:09:29,372 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 54 [2025-03-16 18:09:29,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:29,372 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2025-03-16 18:09:29,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-16 18:09:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2025-03-16 18:09:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-16 18:09:29,374 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:29,374 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2025-03-16 18:09:29,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 18:09:29,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:29,579 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:29,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:29,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1599658939, now seen corresponding path program 1 times [2025-03-16 18:09:29,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:29,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742119277] [2025-03-16 18:09:29,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:29,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:29,584 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-16 18:09:29,589 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 18:09:29,589 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:29,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 18:09:29,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:29,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742119277] [2025-03-16 18:09:29,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742119277] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:29,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965953362] [2025-03-16 18:09:29,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:29,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:29,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:29,670 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:29,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 18:09:29,703 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-16 18:09:29,717 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 18:09:29,717 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:29,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:29,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:09:29,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 18:09:29,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 18:09:29,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965953362] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:29,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:09:29,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-03-16 18:09:29,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258285676] [2025-03-16 18:09:29,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:29,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 18:09:29,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:29,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 18:09:29,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:09:29,848 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-03-16 18:09:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:30,011 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2025-03-16 18:09:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 18:09:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 55 [2025-03-16 18:09:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:30,012 INFO L225 Difference]: With dead ends: 210 [2025-03-16 18:09:30,012 INFO L226 Difference]: Without dead ends: 202 [2025-03-16 18:09:30,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2025-03-16 18:09:30,013 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 65 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:30,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 194 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2025-03-16 18:09:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2025-03-16 18:09:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 128 states have internal predecessors, (148), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2025-03-16 18:09:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2025-03-16 18:09:30,043 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 55 [2025-03-16 18:09:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:30,044 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2025-03-16 18:09:30,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-03-16 18:09:30,044 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2025-03-16 18:09:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-16 18:09:30,045 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:30,045 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1] [2025-03-16 18:09:30,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:30,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:30,246 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:30,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:30,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1897660899, now seen corresponding path program 1 times [2025-03-16 18:09:30,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:30,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646415636] [2025-03-16 18:09:30,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:30,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:30,250 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-16 18:09:30,259 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-16 18:09:30,260 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:30,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-16 18:09:30,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:30,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646415636] [2025-03-16 18:09:30,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646415636] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:30,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721311441] [2025-03-16 18:09:30,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:30,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:30,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:30,348 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) [2025-03-16 18:09:30,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 18:09:30,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-16 18:09:30,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-16 18:09:30,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:30,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:30,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:09:30,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-16 18:09:30,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-16 18:09:30,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721311441] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:30,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:09:30,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-03-16 18:09:30,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506035198] [2025-03-16 18:09:30,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:30,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 18:09:30,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:30,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 18:09:30,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:09:30,512 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 18:09:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:30,678 INFO L93 Difference]: Finished difference Result 278 states and 363 transitions. [2025-03-16 18:09:30,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 18:09:30,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2025-03-16 18:09:30,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:30,680 INFO L225 Difference]: With dead ends: 278 [2025-03-16 18:09:30,681 INFO L226 Difference]: Without dead ends: 258 [2025-03-16 18:09:30,682 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-03-16 18:09:30,683 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 60 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:30,683 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 325 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2025-03-16 18:09:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 234. [2025-03-16 18:09:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 154 states have internal predecessors, (185), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2025-03-16 18:09:30,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 298 transitions. [2025-03-16 18:09:30,717 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 298 transitions. Word has length 56 [2025-03-16 18:09:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:30,717 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 298 transitions. [2025-03-16 18:09:30,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 18:09:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 298 transitions. [2025-03-16 18:09:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 18:09:30,718 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:30,718 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1] [2025-03-16 18:09:30,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 18:09:30,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:30,919 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:30,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:30,919 INFO L85 PathProgramCache]: Analyzing trace with hash 113568804, now seen corresponding path program 1 times [2025-03-16 18:09:30,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:30,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512770853] [2025-03-16 18:09:30,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:30,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:30,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 18:09:30,931 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 18:09:30,931 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:30,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 18:09:30,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:30,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512770853] [2025-03-16 18:09:30,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512770853] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:30,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713348901] [2025-03-16 18:09:30,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:30,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:30,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:30,983 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) [2025-03-16 18:09:30,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 18:09:31,009 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 18:09:31,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 18:09:31,025 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:31,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:31,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:09:31,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 18:09:31,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-16 18:09:31,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713348901] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:31,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:09:31,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-03-16 18:09:31,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018155119] [2025-03-16 18:09:31,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:31,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 18:09:31,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:31,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 18:09:31,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:09:31,159 INFO L87 Difference]: Start difference. First operand 234 states and 298 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-03-16 18:09:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:31,288 INFO L93 Difference]: Finished difference Result 343 states and 447 transitions. [2025-03-16 18:09:31,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 18:09:31,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 58 [2025-03-16 18:09:31,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:31,290 INFO L225 Difference]: With dead ends: 343 [2025-03-16 18:09:31,290 INFO L226 Difference]: Without dead ends: 247 [2025-03-16 18:09:31,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2025-03-16 18:09:31,291 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 66 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:31,292 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 179 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2025-03-16 18:09:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2025-03-16 18:09:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 160 states have (on average 1.175) internal successors, (188), 163 states have internal predecessors, (188), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2025-03-16 18:09:31,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 301 transitions. [2025-03-16 18:09:31,320 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 301 transitions. Word has length 58 [2025-03-16 18:09:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:31,321 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 301 transitions. [2025-03-16 18:09:31,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-03-16 18:09:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 301 transitions. [2025-03-16 18:09:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-16 18:09:31,321 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:31,322 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:31,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 18:09:31,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-16 18:09:31,523 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:31,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:31,523 INFO L85 PathProgramCache]: Analyzing trace with hash 935044587, now seen corresponding path program 1 times [2025-03-16 18:09:31,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:31,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311327467] [2025-03-16 18:09:31,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:31,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:31,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-16 18:09:31,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-16 18:09:31,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:31,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:31,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101611167] [2025-03-16 18:09:31,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:31,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:31,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:31,538 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) [2025-03-16 18:09:31,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 18:09:31,562 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-16 18:09:31,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-16 18:09:31,578 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:31,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:31,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-16 18:09:31,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-16 18:09:31,691 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:31,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311327467] [2025-03-16 18:09:31,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101611167] [2025-03-16 18:09:31,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101611167] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:31,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:31,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2025-03-16 18:09:31,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104314798] [2025-03-16 18:09:31,718 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:31,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:09:31,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:31,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:09:31,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:09:31,719 INFO L87 Difference]: Start difference. First operand 243 states and 301 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-16 18:09:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:31,805 INFO L93 Difference]: Finished difference Result 282 states and 354 transitions. [2025-03-16 18:09:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:09:31,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 63 [2025-03-16 18:09:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:31,807 INFO L225 Difference]: With dead ends: 282 [2025-03-16 18:09:31,807 INFO L226 Difference]: Without dead ends: 277 [2025-03-16 18:09:31,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:09:31,808 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 10 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:31,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 208 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:31,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2025-03-16 18:09:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2025-03-16 18:09:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 182 states have (on average 1.1868131868131868) internal successors, (216), 186 states have internal predecessors, (216), 65 states have call successors, (65), 27 states have call predecessors, (65), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-03-16 18:09:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 342 transitions. [2025-03-16 18:09:31,836 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 342 transitions. Word has length 63 [2025-03-16 18:09:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:31,836 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 342 transitions. [2025-03-16 18:09:31,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-16 18:09:31,836 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 342 transitions. [2025-03-16 18:09:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-16 18:09:31,837 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:31,837 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 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, 1] [2025-03-16 18:09:31,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:32,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:32,041 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:32,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:32,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1000964517, now seen corresponding path program 2 times [2025-03-16 18:09:32,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:32,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786313059] [2025-03-16 18:09:32,041 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:09:32,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:32,047 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 68 statements into 2 equivalence classes. [2025-03-16 18:09:32,061 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 68 of 68 statements. [2025-03-16 18:09:32,061 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:09:32,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:32,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841616905] [2025-03-16 18:09:32,062 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:09:32,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:32,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:32,066 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) [2025-03-16 18:09:32,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 18:09:32,090 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 68 statements into 2 equivalence classes. [2025-03-16 18:09:32,109 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 68 of 68 statements. [2025-03-16 18:09:32,109 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:09:32,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:32,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-16 18:09:32,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-16 18:09:32,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:32,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786313059] [2025-03-16 18:09:32,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841616905] [2025-03-16 18:09:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841616905] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:32,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-16 18:09:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145136023] [2025-03-16 18:09:32,338 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:32,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 18:09:32,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:32,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 18:09:32,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:09:32,339 INFO L87 Difference]: Start difference. First operand 275 states and 342 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 18:09:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:32,451 INFO L93 Difference]: Finished difference Result 290 states and 356 transitions. [2025-03-16 18:09:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 18:09:32,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2025-03-16 18:09:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:32,453 INFO L225 Difference]: With dead ends: 290 [2025-03-16 18:09:32,453 INFO L226 Difference]: Without dead ends: 288 [2025-03-16 18:09:32,454 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:09:32,454 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:32,454 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 222 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2025-03-16 18:09:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2025-03-16 18:09:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 191 states have (on average 1.1780104712041886) internal successors, (225), 195 states have internal predecessors, (225), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-03-16 18:09:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 351 transitions. [2025-03-16 18:09:32,490 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 351 transitions. Word has length 68 [2025-03-16 18:09:32,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:32,491 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 351 transitions. [2025-03-16 18:09:32,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 18:09:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 351 transitions. [2025-03-16 18:09:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-03-16 18:09:32,491 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:32,491 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:32,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 18:09:32,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 18:09:32,692 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:32,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:32,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1573147691, now seen corresponding path program 3 times [2025-03-16 18:09:32,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:32,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896370430] [2025-03-16 18:09:32,693 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:09:32,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:32,697 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 73 statements into 5 equivalence classes. [2025-03-16 18:09:32,712 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 73 of 73 statements. [2025-03-16 18:09:32,712 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 18:09:32,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:32,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427931724] [2025-03-16 18:09:32,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:09:32,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:32,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:32,715 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) [2025-03-16 18:09:32,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 18:09:32,745 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 73 statements into 5 equivalence classes. [2025-03-16 18:09:32,764 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 53 of 73 statements. [2025-03-16 18:09:32,764 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 18:09:32,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:32,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-16 18:09:32,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-03-16 18:09:33,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:33,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:33,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896370430] [2025-03-16 18:09:33,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:33,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427931724] [2025-03-16 18:09:33,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427931724] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:33,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:33,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2025-03-16 18:09:33,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533137415] [2025-03-16 18:09:33,335 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:33,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 18:09:33,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:33,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 18:09:33,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2025-03-16 18:09:33,336 INFO L87 Difference]: Start difference. First operand 287 states and 351 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-16 18:09:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:33,558 INFO L93 Difference]: Finished difference Result 302 states and 365 transitions. [2025-03-16 18:09:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 18:09:33,558 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 73 [2025-03-16 18:09:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:33,560 INFO L225 Difference]: With dead ends: 302 [2025-03-16 18:09:33,560 INFO L226 Difference]: Without dead ends: 298 [2025-03-16 18:09:33,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2025-03-16 18:09:33,560 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:33,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 275 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:09:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2025-03-16 18:09:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2025-03-16 18:09:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 199 states have (on average 1.1658291457286432) internal successors, (232), 202 states have internal predecessors, (232), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-03-16 18:09:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 358 transitions. [2025-03-16 18:09:33,587 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 358 transitions. Word has length 73 [2025-03-16 18:09:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:33,587 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 358 transitions. [2025-03-16 18:09:33,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-16 18:09:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 358 transitions. [2025-03-16 18:09:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-16 18:09:33,588 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:33,588 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 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, 1, 1] [2025-03-16 18:09:33,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:33,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-16 18:09:33,793 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:33,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:33,793 INFO L85 PathProgramCache]: Analyzing trace with hash -92347712, now seen corresponding path program 1 times [2025-03-16 18:09:33,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:33,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891702758] [2025-03-16 18:09:33,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:33,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:33,799 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-16 18:09:33,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 18:09:33,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:33,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:33,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353428389] [2025-03-16 18:09:33,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:33,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:33,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:33,809 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) [2025-03-16 18:09:33,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 18:09:33,834 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-16 18:09:33,853 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 18:09:33,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:33,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:33,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-16 18:09:33,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2025-03-16 18:09:34,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-03-16 18:09:34,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:34,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891702758] [2025-03-16 18:09:34,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:34,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353428389] [2025-03-16 18:09:34,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353428389] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:34,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:09:34,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-03-16 18:09:34,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86351338] [2025-03-16 18:09:34,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:34,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-16 18:09:34,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:34,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-16 18:09:34,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-03-16 18:09:34,579 INFO L87 Difference]: Start difference. First operand 297 states and 358 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-03-16 18:09:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:36,086 INFO L93 Difference]: Finished difference Result 434 states and 580 transitions. [2025-03-16 18:09:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-16 18:09:36,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2025-03-16 18:09:36,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:36,088 INFO L225 Difference]: With dead ends: 434 [2025-03-16 18:09:36,088 INFO L226 Difference]: Without dead ends: 427 [2025-03-16 18:09:36,089 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 18:09:36,089 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 128 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:36,089 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 636 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-16 18:09:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2025-03-16 18:09:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 390. [2025-03-16 18:09:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 255 states have (on average 1.231372549019608) internal successors, (314), 258 states have internal predecessors, (314), 100 states have call successors, (100), 34 states have call predecessors, (100), 34 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2025-03-16 18:09:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 512 transitions. [2025-03-16 18:09:36,156 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 512 transitions. Word has length 79 [2025-03-16 18:09:36,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:36,156 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 512 transitions. [2025-03-16 18:09:36,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-03-16 18:09:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 512 transitions. [2025-03-16 18:09:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-03-16 18:09:36,157 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:36,157 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:36,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:36,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-16 18:09:36,360 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:36,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash -854395746, now seen corresponding path program 4 times [2025-03-16 18:09:36,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:36,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984046580] [2025-03-16 18:09:36,360 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:09:36,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:36,366 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-03-16 18:09:36,371 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 81 of 90 statements. [2025-03-16 18:09:36,374 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 18:09:36,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-03-16 18:09:36,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:36,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984046580] [2025-03-16 18:09:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984046580] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:36,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:09:36,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:09:36,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515075625] [2025-03-16 18:09:36,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:36,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:09:36,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:36,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:09:36,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:09:36,434 INFO L87 Difference]: Start difference. First operand 390 states and 512 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2025-03-16 18:09:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:36,538 INFO L93 Difference]: Finished difference Result 586 states and 830 transitions. [2025-03-16 18:09:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:09:36,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 90 [2025-03-16 18:09:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:36,541 INFO L225 Difference]: With dead ends: 586 [2025-03-16 18:09:36,542 INFO L226 Difference]: Without dead ends: 461 [2025-03-16 18:09:36,542 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:09:36,543 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:36,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 182 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2025-03-16 18:09:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 409. [2025-03-16 18:09:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 266 states have (on average 1.2406015037593985) internal successors, (330), 269 states have internal predecessors, (330), 108 states have call successors, (108), 34 states have call predecessors, (108), 34 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2025-03-16 18:09:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 544 transitions. [2025-03-16 18:09:36,612 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 544 transitions. Word has length 90 [2025-03-16 18:09:36,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:36,612 INFO L471 AbstractCegarLoop]: Abstraction has 409 states and 544 transitions. [2025-03-16 18:09:36,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2025-03-16 18:09:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 544 transitions. [2025-03-16 18:09:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-03-16 18:09:36,613 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:36,613 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:09:36,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-16 18:09:36,614 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:36,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:36,614 INFO L85 PathProgramCache]: Analyzing trace with hash -596793106, now seen corresponding path program 1 times [2025-03-16 18:09:36,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:36,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546609340] [2025-03-16 18:09:36,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:36,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:36,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 96 statements into 1 equivalence classes. [2025-03-16 18:09:36,633 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 96 of 96 statements. [2025-03-16 18:09:36,633 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:36,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:36,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152078647] [2025-03-16 18:09:36,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:36,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:36,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:36,637 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) [2025-03-16 18:09:36,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 18:09:36,666 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 96 statements into 1 equivalence classes. [2025-03-16 18:09:36,690 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 96 of 96 statements. [2025-03-16 18:09:36,690 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:36,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:36,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-16 18:09:36,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 68 proven. 39 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2025-03-16 18:09:37,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2025-03-16 18:09:45,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:45,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546609340] [2025-03-16 18:09:45,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:45,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152078647] [2025-03-16 18:09:45,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152078647] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:45,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:09:45,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2025-03-16 18:09:45,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613566990] [2025-03-16 18:09:45,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:45,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 18:09:45,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:45,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 18:09:45,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2025-03-16 18:09:45,020 INFO L87 Difference]: Start difference. First operand 409 states and 544 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 21 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2025-03-16 18:09:54,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:09:58,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:10:07,001 WARN L286 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-16 18:10:17,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:10:25,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:10:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:25,424 INFO L93 Difference]: Finished difference Result 564 states and 793 transitions. [2025-03-16 18:10:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-16 18:10:25,425 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 21 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) Word has length 96 [2025-03-16 18:10:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:25,427 INFO L225 Difference]: With dead ends: 564 [2025-03-16 18:10:25,427 INFO L226 Difference]: Without dead ends: 562 [2025-03-16 18:10:25,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=432, Invalid=1547, Unknown=1, NotChecked=0, Total=1980 [2025-03-16 18:10:25,428 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 178 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 142 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:25,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 483 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 543 Invalid, 3 Unknown, 0 Unchecked, 18.0s Time] [2025-03-16 18:10:25,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2025-03-16 18:10:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 516. [2025-03-16 18:10:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 327 states have (on average 1.2874617737003058) internal successors, (421), 334 states have internal predecessors, (421), 152 states have call successors, (152), 36 states have call predecessors, (152), 36 states have return successors, (150), 145 states have call predecessors, (150), 150 states have call successors, (150) [2025-03-16 18:10:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 723 transitions. [2025-03-16 18:10:25,562 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 723 transitions. Word has length 96 [2025-03-16 18:10:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:25,562 INFO L471 AbstractCegarLoop]: Abstraction has 516 states and 723 transitions. [2025-03-16 18:10:25,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 21 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2025-03-16 18:10:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 723 transitions. [2025-03-16 18:10:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-03-16 18:10:25,563 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:25,563 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:10:25,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 18:10:25,767 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,SelfDestructingSolverStorable16 [2025-03-16 18:10:25,767 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:25,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:25,767 INFO L85 PathProgramCache]: Analyzing trace with hash -692017517, now seen corresponding path program 1 times [2025-03-16 18:10:25,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:25,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806518889] [2025-03-16 18:10:25,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:10:25,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:25,776 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-16 18:10:25,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-16 18:10:25,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:10:25,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2025-03-16 18:10:25,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:25,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806518889] [2025-03-16 18:10:25,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806518889] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:25,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112381119] [2025-03-16 18:10:25,858 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:10:25,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:25,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:25,860 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) [2025-03-16 18:10:25,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 18:10:25,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-16 18:10:25,910 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-16 18:10:25,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:10:25,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:25,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:10:25,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2025-03-16 18:10:25,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2025-03-16 18:10:26,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112381119] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:10:26,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:10:26,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2025-03-16 18:10:26,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138606329] [2025-03-16 18:10:26,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:26,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 18:10:26,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:26,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 18:10:26,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:10:26,010 INFO L87 Difference]: Start difference. First operand 516 states and 723 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-03-16 18:10:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:26,340 INFO L93 Difference]: Finished difference Result 680 states and 986 transitions. [2025-03-16 18:10:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 18:10:26,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 111 [2025-03-16 18:10:26,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:26,344 INFO L225 Difference]: With dead ends: 680 [2025-03-16 18:10:26,344 INFO L226 Difference]: Without dead ends: 667 [2025-03-16 18:10:26,344 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 221 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-16 18:10:26,344 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 31 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:26,345 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 380 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:10:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2025-03-16 18:10:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 530. [2025-03-16 18:10:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 341 states have (on average 1.281524926686217) internal successors, (437), 348 states have internal predecessors, (437), 152 states have call successors, (152), 36 states have call predecessors, (152), 36 states have return successors, (150), 145 states have call predecessors, (150), 150 states have call successors, (150) [2025-03-16 18:10:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 739 transitions. [2025-03-16 18:10:26,481 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 739 transitions. Word has length 111 [2025-03-16 18:10:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:26,481 INFO L471 AbstractCegarLoop]: Abstraction has 530 states and 739 transitions. [2025-03-16 18:10:26,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-03-16 18:10:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 739 transitions. [2025-03-16 18:10:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-03-16 18:10:26,482 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:26,482 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:10:26,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 18:10:26,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:26,683 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:26,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:26,683 INFO L85 PathProgramCache]: Analyzing trace with hash 188735012, now seen corresponding path program 1 times [2025-03-16 18:10:26,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:26,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689207123] [2025-03-16 18:10:26,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:10:26,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:26,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-16 18:10:26,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-16 18:10:26,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:10:26,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-16 18:10:26,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:26,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689207123] [2025-03-16 18:10:26,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689207123] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:26,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053337815] [2025-03-16 18:10:26,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:10:26,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:26,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:26,829 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) [2025-03-16 18:10:26,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 18:10:26,856 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-16 18:10:26,878 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-16 18:10:26,879 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:10:26,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:26,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 18:10:26,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-03-16 18:10:26,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-16 18:10:27,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053337815] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:10:27,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:10:27,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2025-03-16 18:10:27,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286674289] [2025-03-16 18:10:27,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:27,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 18:10:27,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:27,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 18:10:27,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2025-03-16 18:10:27,129 INFO L87 Difference]: Start difference. First operand 530 states and 739 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) [2025-03-16 18:10:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:27,816 INFO L93 Difference]: Finished difference Result 1809 states and 2574 transitions. [2025-03-16 18:10:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-16 18:10:27,817 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) Word has length 111 [2025-03-16 18:10:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:27,822 INFO L225 Difference]: With dead ends: 1809 [2025-03-16 18:10:27,823 INFO L226 Difference]: Without dead ends: 1532 [2025-03-16 18:10:27,824 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2025-03-16 18:10:27,824 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 255 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:27,825 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 274 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:10:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2025-03-16 18:10:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1464. [2025-03-16 18:10:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 902 states have (on average 1.2195121951219512) internal successors, (1100), 929 states have internal predecessors, (1100), 445 states have call successors, (445), 116 states have call predecessors, (445), 116 states have return successors, (429), 418 states have call predecessors, (429), 429 states have call successors, (429) [2025-03-16 18:10:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1974 transitions. [2025-03-16 18:10:28,306 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1974 transitions. Word has length 111 [2025-03-16 18:10:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:28,307 INFO L471 AbstractCegarLoop]: Abstraction has 1464 states and 1974 transitions. [2025-03-16 18:10:28,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 9 states have call successors, (49), 6 states have call predecessors, (49), 5 states have return successors, (48), 8 states have call predecessors, (48), 8 states have call successors, (48) [2025-03-16 18:10:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1974 transitions. [2025-03-16 18:10:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2025-03-16 18:10:28,307 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:28,308 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:10:28,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-16 18:10:28,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:28,508 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:28,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2015910491, now seen corresponding path program 2 times [2025-03-16 18:10:28,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:28,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216941054] [2025-03-16 18:10:28,508 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:10:28,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:28,514 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 113 statements into 2 equivalence classes. [2025-03-16 18:10:28,535 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 113 of 113 statements. [2025-03-16 18:10:28,535 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:10:28,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:28,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454690881] [2025-03-16 18:10:28,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:10:28,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:28,538 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) [2025-03-16 18:10:28,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 18:10:28,570 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 113 statements into 2 equivalence classes. [2025-03-16 18:10:28,596 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 113 of 113 statements. [2025-03-16 18:10:28,597 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:10:28,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:28,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-16 18:10:28,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 58 proven. 56 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2025-03-16 18:10:29,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2025-03-16 18:10:29,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:29,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216941054] [2025-03-16 18:10:29,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:29,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454690881] [2025-03-16 18:10:29,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454690881] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:10:29,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:10:29,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2025-03-16 18:10:29,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220798470] [2025-03-16 18:10:29,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:29,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 18:10:29,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:29,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 18:10:29,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-03-16 18:10:29,173 INFO L87 Difference]: Start difference. First operand 1464 states and 1974 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 19 states have internal predecessors, (59), 8 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2025-03-16 18:10:30,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:30,562 INFO L93 Difference]: Finished difference Result 1556 states and 2092 transitions. [2025-03-16 18:10:30,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 18:10:30,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 19 states have internal predecessors, (59), 8 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 113 [2025-03-16 18:10:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:30,568 INFO L225 Difference]: With dead ends: 1556 [2025-03-16 18:10:30,568 INFO L226 Difference]: Without dead ends: 1541 [2025-03-16 18:10:30,569 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 18:10:30,569 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 84 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:30,570 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 624 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 18:10:30,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2025-03-16 18:10:31,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1477. [2025-03-16 18:10:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 923 states have (on average 1.2123510292524378) internal successors, (1119), 942 states have internal predecessors, (1119), 430 states have call successors, (430), 123 states have call predecessors, (430), 123 states have return successors, (421), 411 states have call predecessors, (421), 421 states have call successors, (421) [2025-03-16 18:10:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1970 transitions. [2025-03-16 18:10:31,052 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1970 transitions. Word has length 113 [2025-03-16 18:10:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:31,053 INFO L471 AbstractCegarLoop]: Abstraction has 1477 states and 1970 transitions. [2025-03-16 18:10:31,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 19 states have internal predecessors, (59), 8 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2025-03-16 18:10:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1970 transitions. [2025-03-16 18:10:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2025-03-16 18:10:31,054 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:31,054 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:10:31,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-16 18:10:31,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:31,258 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:31,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:31,258 INFO L85 PathProgramCache]: Analyzing trace with hash -288700997, now seen corresponding path program 3 times [2025-03-16 18:10:31,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:31,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010774372] [2025-03-16 18:10:31,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:10:31,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:31,263 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 114 statements into 7 equivalence classes. [2025-03-16 18:10:31,285 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 114 of 114 statements. [2025-03-16 18:10:31,285 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 18:10:31,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:31,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484809939] [2025-03-16 18:10:31,286 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:10:31,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:31,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:31,289 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) [2025-03-16 18:10:31,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 18:10:31,323 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 114 statements into 7 equivalence classes. [2025-03-16 18:10:31,346 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 84 of 114 statements. [2025-03-16 18:10:31,346 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:10:31,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:31,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-16 18:10:31,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 86 proven. 53 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2025-03-16 18:10:31,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:32,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:32,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010774372] [2025-03-16 18:10:32,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:32,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484809939] [2025-03-16 18:10:32,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484809939] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:32,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:10:32,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2025-03-16 18:10:32,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723529403] [2025-03-16 18:10:32,264 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:32,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 18:10:32,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:32,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 18:10:32,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-03-16 18:10:32,264 INFO L87 Difference]: Start difference. First operand 1477 states and 1970 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2025-03-16 18:10:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:32,856 INFO L93 Difference]: Finished difference Result 1566 states and 2080 transitions. [2025-03-16 18:10:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 18:10:32,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 114 [2025-03-16 18:10:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:32,862 INFO L225 Difference]: With dead ends: 1566 [2025-03-16 18:10:32,863 INFO L226 Difference]: Without dead ends: 1564 [2025-03-16 18:10:32,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-03-16 18:10:32,864 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 18 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:32,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 340 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:10:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2025-03-16 18:10:33,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1557. [2025-03-16 18:10:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 970 states have (on average 1.2082474226804123) internal successors, (1172), 989 states have internal predecessors, (1172), 454 states have call successors, (454), 132 states have call predecessors, (454), 132 states have return successors, (445), 435 states have call predecessors, (445), 445 states have call successors, (445) [2025-03-16 18:10:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2071 transitions. [2025-03-16 18:10:33,383 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2071 transitions. Word has length 114 [2025-03-16 18:10:33,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:33,384 INFO L471 AbstractCegarLoop]: Abstraction has 1557 states and 2071 transitions. [2025-03-16 18:10:33,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2025-03-16 18:10:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2071 transitions. [2025-03-16 18:10:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-03-16 18:10:33,385 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:33,385 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:10:33,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-16 18:10:33,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:33,585 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:33,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:33,590 INFO L85 PathProgramCache]: Analyzing trace with hash -824635413, now seen corresponding path program 4 times [2025-03-16 18:10:33,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:33,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774677078] [2025-03-16 18:10:33,590 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:10:33,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:33,594 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 118 statements into 2 equivalence classes. [2025-03-16 18:10:33,611 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-03-16 18:10:33,611 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:10:33,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:33,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800189708] [2025-03-16 18:10:33,612 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:10:33,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:33,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:33,614 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) [2025-03-16 18:10:33,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 18:10:33,642 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 118 statements into 2 equivalence classes. [2025-03-16 18:10:33,662 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 108 of 118 statements. [2025-03-16 18:10:33,662 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 18:10:33,662 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:33,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-03-16 18:10:33,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 57 proven. 65 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2025-03-16 18:10:34,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 65 proven. 48 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2025-03-16 18:10:34,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:34,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774677078] [2025-03-16 18:10:34,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:34,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800189708] [2025-03-16 18:10:34,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800189708] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:10:34,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:10:34,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2025-03-16 18:10:34,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161093346] [2025-03-16 18:10:34,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:34,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 18:10:34,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:34,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 18:10:34,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2025-03-16 18:10:34,861 INFO L87 Difference]: Start difference. First operand 1557 states and 2071 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 25 states have internal predecessors, (66), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2025-03-16 18:10:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:37,626 INFO L93 Difference]: Finished difference Result 2046 states and 2727 transitions. [2025-03-16 18:10:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-16 18:10:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 25 states have internal predecessors, (66), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) Word has length 118 [2025-03-16 18:10:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:37,633 INFO L225 Difference]: With dead ends: 2046 [2025-03-16 18:10:37,633 INFO L226 Difference]: Without dead ends: 2042 [2025-03-16 18:10:37,634 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2025-03-16 18:10:37,635 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 158 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:37,635 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 704 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-16 18:10:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2025-03-16 18:10:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1877. [2025-03-16 18:10:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1188 states have (on average 1.2079124579124578) internal successors, (1435), 1218 states have internal predecessors, (1435), 522 states have call successors, (522), 167 states have call predecessors, (522), 166 states have return successors, (513), 491 states have call predecessors, (513), 513 states have call successors, (513) [2025-03-16 18:10:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 2470 transitions. [2025-03-16 18:10:38,201 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 2470 transitions. Word has length 118 [2025-03-16 18:10:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:38,201 INFO L471 AbstractCegarLoop]: Abstraction has 1877 states and 2470 transitions. [2025-03-16 18:10:38,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 25 states have internal predecessors, (66), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2025-03-16 18:10:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 2470 transitions. [2025-03-16 18:10:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2025-03-16 18:10:38,203 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:38,203 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:10:38,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-16 18:10:38,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:38,403 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:38,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:38,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2129915560, now seen corresponding path program 1 times [2025-03-16 18:10:38,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:38,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160047389] [2025-03-16 18:10:38,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:10:38,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:38,408 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 128 statements into 1 equivalence classes. [2025-03-16 18:10:38,413 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 128 of 128 statements. [2025-03-16 18:10:38,413 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:10:38,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-16 18:10:38,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:38,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160047389] [2025-03-16 18:10:38,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160047389] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:38,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063048148] [2025-03-16 18:10:38,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:10:38,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:38,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:38,555 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) [2025-03-16 18:10:38,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 18:10:38,587 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 128 statements into 1 equivalence classes. [2025-03-16 18:10:38,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 128 of 128 statements. [2025-03-16 18:10:38,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:10:38,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:38,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 18:10:38,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-03-16 18:10:38,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-16 18:10:38,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063048148] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:10:38,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:10:38,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2025-03-16 18:10:38,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390906151] [2025-03-16 18:10:38,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:38,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 18:10:38,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:38,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 18:10:38,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2025-03-16 18:10:38,862 INFO L87 Difference]: Start difference. First operand 1877 states and 2470 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 11 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 10 states have call predecessors, (60), 10 states have call successors, (60) [2025-03-16 18:10:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:39,691 INFO L93 Difference]: Finished difference Result 1946 states and 2536 transitions. [2025-03-16 18:10:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-16 18:10:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 11 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 10 states have call predecessors, (60), 10 states have call successors, (60) Word has length 128 [2025-03-16 18:10:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:39,698 INFO L225 Difference]: With dead ends: 1946 [2025-03-16 18:10:39,698 INFO L226 Difference]: Without dead ends: 1906 [2025-03-16 18:10:39,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2025-03-16 18:10:39,699 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 173 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:39,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 285 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:10:39,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2025-03-16 18:10:40,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1892. [2025-03-16 18:10:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1203 states have (on average 1.1787198669991688) internal successors, (1418), 1233 states have internal predecessors, (1418), 522 states have call successors, (522), 167 states have call predecessors, (522), 166 states have return successors, (513), 491 states have call predecessors, (513), 513 states have call successors, (513) [2025-03-16 18:10:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2453 transitions. [2025-03-16 18:10:40,261 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2453 transitions. Word has length 128 [2025-03-16 18:10:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:40,262 INFO L471 AbstractCegarLoop]: Abstraction has 1892 states and 2453 transitions. [2025-03-16 18:10:40,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 11 states have call successors, (61), 7 states have call predecessors, (61), 6 states have return successors, (60), 10 states have call predecessors, (60), 10 states have call successors, (60) [2025-03-16 18:10:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2453 transitions. [2025-03-16 18:10:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2025-03-16 18:10:40,263 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:40,263 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:10:40,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-16 18:10:40,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:40,464 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:40,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1655392464, now seen corresponding path program 2 times [2025-03-16 18:10:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:40,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892088260] [2025-03-16 18:10:40,464 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:10:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:40,468 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 129 statements into 2 equivalence classes. [2025-03-16 18:10:40,478 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 129 of 129 statements. [2025-03-16 18:10:40,478 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:10:40,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:40,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506947342] [2025-03-16 18:10:40,479 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:10:40,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:40,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:40,481 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) [2025-03-16 18:10:40,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 18:10:40,511 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 129 statements into 2 equivalence classes. [2025-03-16 18:10:40,541 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 129 of 129 statements. [2025-03-16 18:10:40,541 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:10:40,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:40,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-03-16 18:10:40,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-16 18:10:41,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-16 18:10:41,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:41,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892088260] [2025-03-16 18:10:41,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:41,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506947342] [2025-03-16 18:10:41,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506947342] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:10:41,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:10:41,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2025-03-16 18:10:41,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479534341] [2025-03-16 18:10:41,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:41,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 18:10:41,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:41,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 18:10:41,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2025-03-16 18:10:41,574 INFO L87 Difference]: Start difference. First operand 1892 states and 2453 transitions. Second operand has 22 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2025-03-16 18:10:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:46,956 INFO L93 Difference]: Finished difference Result 2313 states and 3080 transitions. [2025-03-16 18:10:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-03-16 18:10:46,956 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) Word has length 129 [2025-03-16 18:10:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:46,964 INFO L225 Difference]: With dead ends: 2313 [2025-03-16 18:10:46,964 INFO L226 Difference]: Without dead ends: 2278 [2025-03-16 18:10:46,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=791, Invalid=3115, Unknown=0, NotChecked=0, Total=3906 [2025-03-16 18:10:46,968 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 236 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:46,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1156 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2025-03-16 18:10:46,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2025-03-16 18:10:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2094. [2025-03-16 18:10:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 1324 states have (on average 1.1858006042296072) internal successors, (1570), 1352 states have internal predecessors, (1570), 594 states have call successors, (594), 176 states have call predecessors, (594), 175 states have return successors, (585), 565 states have call predecessors, (585), 585 states have call successors, (585) [2025-03-16 18:10:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 2749 transitions. [2025-03-16 18:10:47,734 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 2749 transitions. Word has length 129 [2025-03-16 18:10:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:47,734 INFO L471 AbstractCegarLoop]: Abstraction has 2094 states and 2749 transitions. [2025-03-16 18:10:47,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.9) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2025-03-16 18:10:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 2749 transitions. [2025-03-16 18:10:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-16 18:10:47,736 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:47,736 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:10:47,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-16 18:10:47,936 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,SelfDestructingSolverStorable23 [2025-03-16 18:10:47,936 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:47,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:47,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1833779838, now seen corresponding path program 5 times [2025-03-16 18:10:47,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:47,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546678128] [2025-03-16 18:10:47,937 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:10:47,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:47,942 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 146 statements into 7 equivalence classes. [2025-03-16 18:10:47,957 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 146 of 146 statements. [2025-03-16 18:10:47,957 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 18:10:47,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:47,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750635298] [2025-03-16 18:10:47,958 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:10:47,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:47,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:47,960 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) [2025-03-16 18:10:47,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 18:10:48,002 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 146 statements into 7 equivalence classes. [2025-03-16 18:10:48,076 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 146 of 146 statements. [2025-03-16 18:10:48,077 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 18:10:48,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:48,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-16 18:10:48,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 105 proven. 111 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2025-03-16 18:10:56,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:56,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:56,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546678128] [2025-03-16 18:10:56,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:56,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750635298] [2025-03-16 18:10:56,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750635298] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:56,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:10:56,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2025-03-16 18:10:56,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602082462] [2025-03-16 18:10:56,562 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:56,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 18:10:56,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:56,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 18:10:56,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2025-03-16 18:10:56,563 INFO L87 Difference]: Start difference. First operand 2094 states and 2749 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2025-03-16 18:10:58,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-03-16 18:11:00,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-03-16 18:11:04,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-03-16 18:11:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:05,805 INFO L93 Difference]: Finished difference Result 2131 states and 2779 transitions. [2025-03-16 18:11:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 18:11:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 146 [2025-03-16 18:11:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:05,812 INFO L225 Difference]: With dead ends: 2131 [2025-03-16 18:11:05,813 INFO L226 Difference]: Without dead ends: 2127 [2025-03-16 18:11:05,813 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2025-03-16 18:11:05,814 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 41 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:05,814 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 739 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 606 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2025-03-16 18:11:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2025-03-16 18:11:06,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2117. [2025-03-16 18:11:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 1342 states have (on average 1.1825633383010432) internal successors, (1587), 1369 states have internal predecessors, (1587), 593 states have call successors, (593), 182 states have call predecessors, (593), 181 states have return successors, (585), 565 states have call predecessors, (585), 585 states have call successors, (585) [2025-03-16 18:11:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 2765 transitions. [2025-03-16 18:11:06,600 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 2765 transitions. Word has length 146 [2025-03-16 18:11:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:06,601 INFO L471 AbstractCegarLoop]: Abstraction has 2117 states and 2765 transitions. [2025-03-16 18:11:06,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2025-03-16 18:11:06,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 2765 transitions. [2025-03-16 18:11:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2025-03-16 18:11:06,602 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:06,602 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:06,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-16 18:11:06,803 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,SelfDestructingSolverStorable24 [2025-03-16 18:11:06,803 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:06,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash 690145443, now seen corresponding path program 3 times [2025-03-16 18:11:06,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:06,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934427229] [2025-03-16 18:11:06,804 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:11:06,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:06,808 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 148 statements into 12 equivalence classes. [2025-03-16 18:11:06,832 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 148 of 148 statements. [2025-03-16 18:11:06,835 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-16 18:11:06,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:06,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942610233] [2025-03-16 18:11:06,836 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:11:06,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:06,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:06,838 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) [2025-03-16 18:11:06,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 18:11:06,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 148 statements into 12 equivalence classes. [2025-03-16 18:11:06,900 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 72 of 148 statements. [2025-03-16 18:11:06,900 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:11:06,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:06,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-16 18:11:06,903 INFO L279 TraceCheckSpWp]: Computing forward predicates...