./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.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 bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:52:37,112 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:52:37,162 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:52:37,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:52:37,166 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:52:37,184 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:52:37,185 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:52:37,185 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:52:37,186 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:52:37,186 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:52:37,186 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:52:37,186 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:52:37,186 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:52:37,186 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:52:37,187 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:52:37,187 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:52:37,187 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:52:37,188 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:52:37,188 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:52:37,188 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:52:37,188 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:52:37,188 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:52:37,188 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:52:37,188 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:52:37,188 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:52:37,189 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:52:37,189 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:52:37,189 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:52:37,189 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:52:37,189 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:52:37,189 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:52:37,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:52:37,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:52:37,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:52:37,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:52:37,190 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:52:37,190 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:52:37,190 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:52:37,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:52:37,190 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:52:37,190 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:52:37,190 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:52:37,190 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:52:37,190 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 -> bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e [2025-03-03 13:52:37,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:52:37,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:52:37,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:52:37,409 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:52:37,409 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:52:37,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2025-03-03 13:52:38,553 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b697a86a/5d3d358382ff4bc4bf78ba3d457a5822/FLAGff9ee13c9 [2025-03-03 13:52:38,830 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:52:38,834 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2025-03-03 13:52:38,841 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b697a86a/5d3d358382ff4bc4bf78ba3d457a5822/FLAGff9ee13c9 [2025-03-03 13:52:38,858 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b697a86a/5d3d358382ff4bc4bf78ba3d457a5822 [2025-03-03 13:52:38,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:52:38,861 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:52:38,863 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:52:38,863 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:52:38,866 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:52:38,867 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,868 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e635ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38, skipping insertion in model container [2025-03-03 13:52:38,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,878 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:52:38,978 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/egcd3-ll_valuebound2.c[490,503] [2025-03-03 13:52:38,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:52:39,005 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:52:39,013 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/egcd3-ll_valuebound2.c[490,503] [2025-03-03 13:52:39,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:52:39,031 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:52:39,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39 WrapperNode [2025-03-03 13:52:39,031 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:52:39,032 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:52:39,032 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:52:39,032 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:52:39,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,040 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,049 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2025-03-03 13:52:39,050 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:52:39,051 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:52:39,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:52:39,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:52:39,056 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,057 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,064 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 13:52:39,064 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,067 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,068 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,068 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,069 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:52:39,071 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:52:39,071 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:52:39,071 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:52:39,071 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (1/1) ... [2025-03-03 13:52:39,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:52:39,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:39,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 13:52:39,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 13:52:39,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:52:39,108 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-03 13:52:39,108 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-03 13:52:39,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:52:39,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:52:39,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:52:39,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:52:39,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:52:39,143 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:52:39,145 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:52:39,275 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 13:52:39,275 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:52:39,283 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:52:39,284 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:52:39,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:52:39 BoogieIcfgContainer [2025-03-03 13:52:39,284 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:52:39,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:52:39,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:52:39,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:52:39,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:52:38" (1/3) ... [2025-03-03 13:52:39,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd3bad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:52:39, skipping insertion in model container [2025-03-03 13:52:39,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:39" (2/3) ... [2025-03-03 13:52:39,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd3bad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:52:39, skipping insertion in model container [2025-03-03 13:52:39,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:52:39" (3/3) ... [2025-03-03 13:52:39,293 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.c [2025-03-03 13:52:39,306 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:52:39,307 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_valuebound2.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 13:52:39,337 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:52:39,344 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;@1c9cfc85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:52:39,345 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:52:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-03 13:52:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:52:39,352 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:39,352 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] [2025-03-03 13:52:39,353 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:39,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:39,357 INFO L85 PathProgramCache]: Analyzing trace with hash -743363080, now seen corresponding path program 1 times [2025-03-03 13:52:39,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:39,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323540797] [2025-03-03 13:52:39,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:39,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:39,415 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:39,426 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:39,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:39,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 13:52:39,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:39,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323540797] [2025-03-03 13:52:39,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323540797] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:39,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603473787] [2025-03-03 13:52:39,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:39,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:39,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:39,468 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:39,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:52:39,519 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:39,541 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:39,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:39,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:39,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-03 13:52:39,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 13:52:39,557 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:39,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603473787] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:39,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:39,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-03 13:52:39,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011855757] [2025-03-03 13:52:39,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:39,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 13:52:39,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:39,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 13:52:39,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:52:39,579 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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), 2 states have call successors, (4) [2025-03-03 13:52:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:39,590 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2025-03-03 13:52:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 13:52:39,591 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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), 2 states have call successors, (4) Word has length 29 [2025-03-03 13:52:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:39,595 INFO L225 Difference]: With dead ends: 61 [2025-03-03 13:52:39,595 INFO L226 Difference]: Without dead ends: 28 [2025-03-03 13:52:39,597 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:52:39,599 INFO L435 NwaCegarLoop]: 41 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, 41 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 [2025-03-03 13:52:39,599 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:39,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-03 13:52:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-03 13:52:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:52:39,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2025-03-03 13:52:39,623 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 29 [2025-03-03 13:52:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:39,623 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2025-03-03 13:52:39,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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), 2 states have call successors, (4) [2025-03-03 13:52:39,624 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2025-03-03 13:52:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:52:39,624 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:39,625 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] [2025-03-03 13:52:39,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:39,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-03 13:52:39,829 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:39,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1683090086, now seen corresponding path program 1 times [2025-03-03 13:52:39,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:39,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745889823] [2025-03-03 13:52:39,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:39,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:39,840 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:39,859 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:39,859 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:39,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:40,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:40,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745889823] [2025-03-03 13:52:40,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745889823] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:40,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:40,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-03 13:52:40,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996906264] [2025-03-03 13:52:40,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:40,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 13:52:40,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:40,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 13:52:40,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:40,034 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:40,116 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2025-03-03 13:52:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:40,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2025-03-03 13:52:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:40,117 INFO L225 Difference]: With dead ends: 44 [2025-03-03 13:52:40,117 INFO L226 Difference]: Without dead ends: 37 [2025-03-03 13:52:40,118 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:40,118 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:40,118 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-03 13:52:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2025-03-03 13:52:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:52:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2025-03-03 13:52:40,126 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 29 [2025-03-03 13:52:40,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:40,126 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2025-03-03 13:52:40,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2025-03-03 13:52:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-03 13:52:40,127 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:40,127 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] [2025-03-03 13:52:40,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 13:52:40,127 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:40,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:40,127 INFO L85 PathProgramCache]: Analyzing trace with hash -602638456, now seen corresponding path program 1 times [2025-03-03 13:52:40,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:40,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356196745] [2025-03-03 13:52:40,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:40,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:52:40,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:52:40,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:40,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:40,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364228212] [2025-03-03 13:52:40,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:40,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:40,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:40,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:40,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:52:40,184 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:52:40,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:52:40,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:40,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:40,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:52:40,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:40,290 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:40,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:40,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356196745] [2025-03-03 13:52:40,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:40,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364228212] [2025-03-03 13:52:40,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364228212] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:40,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:40,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:40,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867381378] [2025-03-03 13:52:40,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:40,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:40,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:40,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:40,294 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2025-03-03 13:52:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:40,328 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2025-03-03 13:52:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:40,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 30 [2025-03-03 13:52:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:40,329 INFO L225 Difference]: With dead ends: 43 [2025-03-03 13:52:40,329 INFO L226 Difference]: Without dead ends: 41 [2025-03-03 13:52:40,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:40,330 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:40,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-03 13:52:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2025-03-03 13:52:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 13:52:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2025-03-03 13:52:40,337 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 30 [2025-03-03 13:52:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:40,337 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2025-03-03 13:52:40,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2025-03-03 13:52:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2025-03-03 13:52:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 13:52:40,337 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:40,337 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, 1] [2025-03-03 13:52:40,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 13:52:40,543 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,SelfDestructingSolverStorable2 [2025-03-03 13:52:40,543 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:40,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:40,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1811518815, now seen corresponding path program 1 times [2025-03-03 13:52:40,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:40,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958033031] [2025-03-03 13:52:40,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:40,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:40,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-03 13:52:40,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:52:40,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:40,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:40,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:40,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958033031] [2025-03-03 13:52:40,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958033031] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:40,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324166494] [2025-03-03 13:52:40,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:40,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:40,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:40,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:40,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:52:40,728 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-03 13:52:40,742 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:52:40,743 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:40,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:40,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:52:40,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:40,793 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:40,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324166494] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:40,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:40,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-03-03 13:52:40,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328240226] [2025-03-03 13:52:40,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:40,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:52:40,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:40,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:52:40,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:52:40,877 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:41,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:41,009 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2025-03-03 13:52:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:52:41,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2025-03-03 13:52:41,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:41,010 INFO L225 Difference]: With dead ends: 82 [2025-03-03 13:52:41,010 INFO L226 Difference]: Without dead ends: 75 [2025-03-03 13:52:41,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:52:41,011 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:41,011 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 166 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-03 13:52:41,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2025-03-03 13:52:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 34 states have internal predecessors, (45), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-03 13:52:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2025-03-03 13:52:41,020 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 32 [2025-03-03 13:52:41,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:41,021 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2025-03-03 13:52:41,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2025-03-03 13:52:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:52:41,021 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:41,022 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] [2025-03-03 13:52:41,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 13:52:41,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:41,222 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:41,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash 356055075, now seen corresponding path program 1 times [2025-03-03 13:52:41,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:41,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710043047] [2025-03-03 13:52:41,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:41,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:41,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 13:52:41,233 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:52:41,233 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:41,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:41,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538254696] [2025-03-03 13:52:41,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:41,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:41,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:41,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:41,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:52:41,263 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 13:52:41,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:52:41,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:41,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:41,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-03 13:52:41,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:41,340 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:41,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:41,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710043047] [2025-03-03 13:52:41,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:41,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538254696] [2025-03-03 13:52:41,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538254696] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:41,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:41,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-03-03 13:52:41,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664526698] [2025-03-03 13:52:41,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:41,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 13:52:41,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:41,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 13:52:41,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:52:41,446 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:41,547 INFO L93 Difference]: Finished difference Result 83 states and 120 transitions. [2025-03-03 13:52:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:41,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2025-03-03 13:52:41,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:41,551 INFO L225 Difference]: With dead ends: 83 [2025-03-03 13:52:41,551 INFO L226 Difference]: Without dead ends: 81 [2025-03-03 13:52:41,551 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-03 13:52:41,551 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:41,551 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 246 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-03 13:52:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2025-03-03 13:52:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-03 13:52:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 114 transitions. [2025-03-03 13:52:41,590 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 114 transitions. Word has length 33 [2025-03-03 13:52:41,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:41,590 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 114 transitions. [2025-03-03 13:52:41,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:41,590 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 114 transitions. [2025-03-03 13:52:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 13:52:41,591 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:41,591 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:41,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:41,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:41,791 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:41,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:41,792 INFO L85 PathProgramCache]: Analyzing trace with hash -737481304, now seen corresponding path program 2 times [2025-03-03 13:52:41,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:41,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328489005] [2025-03-03 13:52:41,792 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:41,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:41,796 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-03 13:52:41,806 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 13:52:41,807 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:41,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:41,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:41,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328489005] [2025-03-03 13:52:41,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328489005] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:41,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:41,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:41,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461899211] [2025-03-03 13:52:41,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:41,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:41,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:41,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:41,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:41,887 INFO L87 Difference]: Start difference. First operand 77 states and 114 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2025-03-03 13:52:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:41,967 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2025-03-03 13:52:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:41,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 36 [2025-03-03 13:52:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:41,969 INFO L225 Difference]: With dead ends: 116 [2025-03-03 13:52:41,969 INFO L226 Difference]: Without dead ends: 87 [2025-03-03 13:52:41,969 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 [2025-03-03 13:52:41,970 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:41,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 122 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-03 13:52:41,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2025-03-03 13:52:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-03 13:52:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2025-03-03 13:52:41,989 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 36 [2025-03-03 13:52:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:41,989 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2025-03-03 13:52:41,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2025-03-03 13:52:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2025-03-03 13:52:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-03 13:52:41,991 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:41,991 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-03 13:52:41,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-03 13:52:41,991 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:41,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash 437747302, now seen corresponding path program 1 times [2025-03-03 13:52:41,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:41,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672725842] [2025-03-03 13:52:41,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:41,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:41,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 13:52:42,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:52:42,008 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:42,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029159330] [2025-03-03 13:52:42,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:42,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:42,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:52:42,037 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 13:52:42,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:52:42,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:42,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 13:52:42,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:42,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:42,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:42,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672725842] [2025-03-03 13:52:42,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:42,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029159330] [2025-03-03 13:52:42,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029159330] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:42,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:42,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-03 13:52:42,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580389462] [2025-03-03 13:52:42,184 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:42,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:52:42,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:42,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:52:42,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:52:42,188 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2025-03-03 13:52:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:42,309 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2025-03-03 13:52:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:52:42,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 38 [2025-03-03 13:52:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:42,310 INFO L225 Difference]: With dead ends: 79 [2025-03-03 13:52:42,310 INFO L226 Difference]: Without dead ends: 77 [2025-03-03 13:52:42,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:52:42,311 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:42,311 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 179 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-03 13:52:42,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2025-03-03 13:52:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-03 13:52:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2025-03-03 13:52:42,321 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 38 [2025-03-03 13:52:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:42,322 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2025-03-03 13:52:42,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2025-03-03 13:52:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2025-03-03 13:52:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-03 13:52:42,323 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:42,323 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:42,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 13:52:42,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,523 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:42,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:42,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1953213885, now seen corresponding path program 1 times [2025-03-03 13:52:42,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:42,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678919239] [2025-03-03 13:52:42,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:42,527 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 13:52:42,533 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 13:52:42,533 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:42,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181680998] [2025-03-03 13:52:42,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:42,536 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:42,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:52:42,557 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 13:52:42,569 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 13:52:42,570 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:42,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:52:42,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-03 13:52:42,620 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:42,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:42,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678919239] [2025-03-03 13:52:42,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:42,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181680998] [2025-03-03 13:52:42,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181680998] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:42,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:42,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:42,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923080844] [2025-03-03 13:52:42,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:42,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:42,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:42,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:42,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:42,622 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-03 13:52:42,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:42,688 INFO L93 Difference]: Finished difference Result 104 states and 148 transitions. [2025-03-03 13:52:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:42,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2025-03-03 13:52:42,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:42,690 INFO L225 Difference]: With dead ends: 104 [2025-03-03 13:52:42,690 INFO L226 Difference]: Without dead ends: 102 [2025-03-03 13:52:42,690 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:42,691 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:42,691 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-03 13:52:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2025-03-03 13:52:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2025-03-03 13:52:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2025-03-03 13:52:42,707 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 43 [2025-03-03 13:52:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:42,708 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2025-03-03 13:52:42,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-03 13:52:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2025-03-03 13:52:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:52:42,709 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:42,709 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] [2025-03-03 13:52:42,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 13:52:42,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,909 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:42,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:42,910 INFO L85 PathProgramCache]: Analyzing trace with hash -762809663, now seen corresponding path program 1 times [2025-03-03 13:52:42,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:42,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470959160] [2025-03-03 13:52:42,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:42,913 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:52:42,918 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:52:42,918 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:42,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170354854] [2025-03-03 13:52:42,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:42,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:42,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:52:42,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:52:42,954 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:52:42,954 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:42,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:52:42,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 13:52:42,985 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:42,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470959160] [2025-03-03 13:52:42,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170354854] [2025-03-03 13:52:42,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170354854] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:42,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:42,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:42,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889300201] [2025-03-03 13:52:42,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:42,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:42,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:42,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:42,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:42,986 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2025-03-03 13:52:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:43,038 INFO L93 Difference]: Finished difference Result 148 states and 231 transitions. [2025-03-03 13:52:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:43,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 45 [2025-03-03 13:52:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:43,042 INFO L225 Difference]: With dead ends: 148 [2025-03-03 13:52:43,042 INFO L226 Difference]: Without dead ends: 146 [2025-03-03 13:52:43,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:43,043 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:43,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2025-03-03 13:52:43,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2025-03-03 13:52:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2025-03-03 13:52:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 209 transitions. [2025-03-03 13:52:43,067 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 209 transitions. Word has length 45 [2025-03-03 13:52:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:43,067 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 209 transitions. [2025-03-03 13:52:43,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2025-03-03 13:52:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 209 transitions. [2025-03-03 13:52:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-03 13:52:43,068 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:43,068 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1] [2025-03-03 13:52:43,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 13:52:43,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:43,272 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:43,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:43,273 INFO L85 PathProgramCache]: Analyzing trace with hash 17136405, now seen corresponding path program 1 times [2025-03-03 13:52:43,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:43,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505604141] [2025-03-03 13:52:43,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:43,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:43,277 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-03 13:52:43,285 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 13:52:43,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:43,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:43,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585243123] [2025-03-03 13:52:43,286 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:43,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:43,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:43,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:43,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 13:52:43,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-03 13:52:43,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 13:52:43,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:43,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:43,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-03 13:52:43,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-03 13:52:43,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-03 13:52:44,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:44,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505604141] [2025-03-03 13:52:44,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:44,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585243123] [2025-03-03 13:52:44,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585243123] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:44,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:44,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-03-03 13:52:44,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974598031] [2025-03-03 13:52:44,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:44,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 13:52:44,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:44,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 13:52:44,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:52:44,157 INFO L87 Difference]: Start difference. First operand 134 states and 209 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:46,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:46,191 INFO L93 Difference]: Finished difference Result 358 states and 580 transitions. [2025-03-03 13:52:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-03 13:52:46,192 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 55 [2025-03-03 13:52:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:46,194 INFO L225 Difference]: With dead ends: 358 [2025-03-03 13:52:46,194 INFO L226 Difference]: Without dead ends: 276 [2025-03-03 13:52:46,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 13:52:46,199 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:46,199 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 293 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-03 13:52:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2025-03-03 13:52:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 204. [2025-03-03 13:52:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 106 states have internal predecessors, (130), 93 states have call successors, (93), 11 states have call predecessors, (93), 11 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-03 13:52:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 315 transitions. [2025-03-03 13:52:46,265 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 315 transitions. Word has length 55 [2025-03-03 13:52:46,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:46,266 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 315 transitions. [2025-03-03 13:52:46,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:46,266 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 315 transitions. [2025-03-03 13:52:46,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-03 13:52:46,267 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:46,268 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 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] [2025-03-03 13:52:46,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 13:52:46,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 13:52:46,470 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:46,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:46,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1304203768, now seen corresponding path program 1 times [2025-03-03 13:52:46,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:46,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119192660] [2025-03-03 13:52:46,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:46,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:46,475 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-03 13:52:46,485 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-03 13:52:46,487 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:46,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 13:52:46,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:46,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119192660] [2025-03-03 13:52:46,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119192660] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:46,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661394177] [2025-03-03 13:52:46,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:46,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:46,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:46,663 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:46,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 13:52:46,685 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-03 13:52:46,701 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-03 13:52:46,701 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:46,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:46,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 13:52:46,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 13:52:46,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 13:52:46,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661394177] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:46,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:46,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2025-03-03 13:52:46,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349629627] [2025-03-03 13:52:46,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:46,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:52:46,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:46,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:52:46,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:52:46,922 INFO L87 Difference]: Start difference. First operand 204 states and 315 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2025-03-03 13:52:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:47,261 INFO L93 Difference]: Finished difference Result 304 states and 465 transitions. [2025-03-03 13:52:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:52:47,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 59 [2025-03-03 13:52:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:47,263 INFO L225 Difference]: With dead ends: 304 [2025-03-03 13:52:47,263 INFO L226 Difference]: Without dead ends: 197 [2025-03-03 13:52:47,264 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:52:47,265 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:47,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 328 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:52:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2025-03-03 13:52:47,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 185. [2025-03-03 13:52:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 90 states have internal predecessors, (106), 89 states have call successors, (89), 11 states have call predecessors, (89), 11 states have return successors, (88), 83 states have call predecessors, (88), 88 states have call successors, (88) [2025-03-03 13:52:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 283 transitions. [2025-03-03 13:52:47,350 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 283 transitions. Word has length 59 [2025-03-03 13:52:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:47,351 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 283 transitions. [2025-03-03 13:52:47,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2025-03-03 13:52:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 283 transitions. [2025-03-03 13:52:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-03 13:52:47,353 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:47,353 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2025-03-03 13:52:47,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 13:52:47,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:47,553 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:47,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:47,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1757610922, now seen corresponding path program 1 times [2025-03-03 13:52:47,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:47,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629529887] [2025-03-03 13:52:47,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:47,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:47,562 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-03 13:52:47,570 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-03 13:52:47,570 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:47,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:47,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003142622] [2025-03-03 13:52:47,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:47,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:47,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:47,574 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:47,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:52:47,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-03 13:52:47,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-03 13:52:47,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:47,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:47,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-03 13:52:47,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-03-03 13:52:47,665 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2025-03-03 13:52:47,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:47,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629529887] [2025-03-03 13:52:47,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:47,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003142622] [2025-03-03 13:52:47,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003142622] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:47,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:47,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-03-03 13:52:47,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448109434] [2025-03-03 13:52:47,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:47,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:47,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:47,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:47,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:52:47,732 INFO L87 Difference]: Start difference. First operand 185 states and 283 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 13:52:47,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:47,806 INFO L93 Difference]: Finished difference Result 191 states and 288 transitions. [2025-03-03 13:52:47,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:47,807 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 66 [2025-03-03 13:52:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:47,809 INFO L225 Difference]: With dead ends: 191 [2025-03-03 13:52:47,809 INFO L226 Difference]: Without dead ends: 189 [2025-03-03 13:52:47,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:52:47,809 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 116 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 [2025-03-03 13:52:47,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 116 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2025-03-03 13:52:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2025-03-03 13:52:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 93 states have internal predecessors, (109), 89 states have call successors, (89), 12 states have call predecessors, (89), 12 states have return successors, (88), 83 states have call predecessors, (88), 88 states have call successors, (88) [2025-03-03 13:52:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 286 transitions. [2025-03-03 13:52:47,861 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 286 transitions. Word has length 66 [2025-03-03 13:52:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:47,861 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 286 transitions. [2025-03-03 13:52:47,862 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 13:52:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 286 transitions. [2025-03-03 13:52:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-03 13:52:47,862 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:47,863 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1] [2025-03-03 13:52:47,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:48,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 13:52:48,063 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:48,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1883736123, now seen corresponding path program 1 times [2025-03-03 13:52:48,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:48,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371568951] [2025-03-03 13:52:48,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:48,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:48,067 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-03 13:52:48,075 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-03 13:52:48,075 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:48,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:48,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925360902] [2025-03-03 13:52:48,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:48,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:48,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:48,078 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:48,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:52:48,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-03 13:52:48,126 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-03 13:52:48,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:48,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:48,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-03-03 13:52:48,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2025-03-03 13:52:48,920 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:49,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:49,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371568951] [2025-03-03 13:52:49,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:49,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925360902] [2025-03-03 13:52:49,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925360902] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:49,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:49,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-03 13:52:49,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504026129] [2025-03-03 13:52:49,843 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:49,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:52:49,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:49,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:52:49,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:52:49,844 INFO L87 Difference]: Start difference. First operand 189 states and 286 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-03 13:52:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:50,862 INFO L93 Difference]: Finished difference Result 289 states and 447 transitions. [2025-03-03 13:52:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:52:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2025-03-03 13:52:50,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:50,865 INFO L225 Difference]: With dead ends: 289 [2025-03-03 13:52:50,865 INFO L226 Difference]: Without dead ends: 286 [2025-03-03 13:52:50,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:52:50,867 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:50,867 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 288 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 13:52:50,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2025-03-03 13:52:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 277. [2025-03-03 13:52:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 119 states have (on average 1.2857142857142858) internal successors, (153), 129 states have internal predecessors, (153), 141 states have call successors, (141), 16 states have call predecessors, (141), 16 states have return successors, (140), 131 states have call predecessors, (140), 140 states have call successors, (140) [2025-03-03 13:52:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 434 transitions. [2025-03-03 13:52:50,950 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 434 transitions. Word has length 79 [2025-03-03 13:52:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:50,950 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 434 transitions. [2025-03-03 13:52:50,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-03 13:52:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 434 transitions. [2025-03-03 13:52:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-03 13:52:50,951 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:50,952 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 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] [2025-03-03 13:52:50,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 13:52:51,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 13:52:51,152 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:51,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:51,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1057848527, now seen corresponding path program 1 times [2025-03-03 13:52:51,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:51,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885322575] [2025-03-03 13:52:51,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:51,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:51,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 82 statements into 1 equivalence classes. [2025-03-03 13:52:51,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 82 of 82 statements. [2025-03-03 13:52:51,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:51,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2025-03-03 13:52:51,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:51,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885322575] [2025-03-03 13:52:51,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885322575] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:51,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897086495] [2025-03-03 13:52:51,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:51,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:51,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:51,414 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:51,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 13:52:51,441 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 82 statements into 1 equivalence classes. [2025-03-03 13:52:51,458 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 82 of 82 statements. [2025-03-03 13:52:51,459 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:51,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:51,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-03 13:52:51,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 54 proven. 16 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2025-03-03 13:52:51,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2025-03-03 13:52:51,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897086495] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:51,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:51,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2025-03-03 13:52:51,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457695793] [2025-03-03 13:52:51,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:51,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:52:51,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:51,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:52:51,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:52:51,781 INFO L87 Difference]: Start difference. First operand 277 states and 434 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) [2025-03-03 13:52:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:52,299 INFO L93 Difference]: Finished difference Result 412 states and 645 transitions. [2025-03-03 13:52:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 13:52:52,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) Word has length 82 [2025-03-03 13:52:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:52,302 INFO L225 Difference]: With dead ends: 412 [2025-03-03 13:52:52,302 INFO L226 Difference]: Without dead ends: 239 [2025-03-03 13:52:52,303 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 13:52:52,304 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 57 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:52,304 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 408 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:52:52,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2025-03-03 13:52:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2025-03-03 13:52:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 102 states have (on average 1.2745098039215685) internal successors, (130), 111 states have internal predecessors, (130), 121 states have call successors, (121), 14 states have call predecessors, (121), 14 states have return successors, (120), 112 states have call predecessors, (120), 120 states have call successors, (120) [2025-03-03 13:52:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 371 transitions. [2025-03-03 13:52:52,377 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 371 transitions. Word has length 82 [2025-03-03 13:52:52,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:52,377 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 371 transitions. [2025-03-03 13:52:52,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (38), 10 states have call predecessors, (38), 11 states have call successors, (38) [2025-03-03 13:52:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 371 transitions. [2025-03-03 13:52:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-03 13:52:52,378 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:52,378 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:52,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:52,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 13:52:52,578 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:52,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:52,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1271174515, now seen corresponding path program 1 times [2025-03-03 13:52:52,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:52,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117237610] [2025-03-03 13:52:52,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:52,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:52,582 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-03-03 13:52:52,589 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 13:52:52,589 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:52,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2025-03-03 13:52:52,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:52,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117237610] [2025-03-03 13:52:52,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117237610] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:52,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407669722] [2025-03-03 13:52:52,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:52,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:52,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:52,789 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:52,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 13:52:52,814 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-03-03 13:52:52,829 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 13:52:52,830 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:52,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:52,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 13:52:52,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 87 proven. 14 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-03-03 13:52:52,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2025-03-03 13:52:53,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407669722] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:53,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:53,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2025-03-03 13:52:53,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242025332] [2025-03-03 13:52:53,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:53,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 13:52:53,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:53,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 13:52:53,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2025-03-03 13:52:53,104 INFO L87 Difference]: Start difference. First operand 238 states and 371 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2025-03-03 13:52:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:53,390 INFO L93 Difference]: Finished difference Result 354 states and 534 transitions. [2025-03-03 13:52:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:52:53,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) Word has length 84 [2025-03-03 13:52:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:53,393 INFO L225 Difference]: With dead ends: 354 [2025-03-03 13:52:53,393 INFO L226 Difference]: Without dead ends: 186 [2025-03-03 13:52:53,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:52:53,394 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:53,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 299 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:52:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2025-03-03 13:52:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2025-03-03 13:52:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 91 states have internal predecessors, (110), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2025-03-03 13:52:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 263 transitions. [2025-03-03 13:52:53,459 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 263 transitions. Word has length 84 [2025-03-03 13:52:53,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:53,459 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 263 transitions. [2025-03-03 13:52:53,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (36), 9 states have call predecessors, (36), 10 states have call successors, (36) [2025-03-03 13:52:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 263 transitions. [2025-03-03 13:52:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-03-03 13:52:53,459 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:53,459 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 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] [2025-03-03 13:52:53,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-03 13:52:53,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 13:52:53,660 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:53,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:53,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1264614476, now seen corresponding path program 2 times [2025-03-03 13:52:53,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:53,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125664005] [2025-03-03 13:52:53,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:53,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:53,664 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 85 statements into 2 equivalence classes. [2025-03-03 13:52:53,683 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 85 of 85 statements. [2025-03-03 13:52:53,683 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:53,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2025-03-03 13:52:54,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:54,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125664005] [2025-03-03 13:52:54,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125664005] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:54,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446332051] [2025-03-03 13:52:54,061 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:54,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:54,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:54,063 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:54,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 13:52:54,085 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 85 statements into 2 equivalence classes. [2025-03-03 13:52:54,104 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 85 of 85 statements. [2025-03-03 13:52:54,105 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:54,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:54,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:52:54,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2025-03-03 13:52:54,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2025-03-03 13:52:54,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446332051] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:54,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:54,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 31 [2025-03-03 13:52:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475539102] [2025-03-03 13:52:54,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:54,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 13:52:54,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:54,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 13:52:54,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:52:54,539 INFO L87 Difference]: Start difference. First operand 182 states and 263 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 28 states have internal predecessors, (53), 12 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) [2025-03-03 13:52:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:55,423 INFO L93 Difference]: Finished difference Result 228 states and 322 transitions. [2025-03-03 13:52:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 13:52:55,423 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 28 states have internal predecessors, (53), 12 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) Word has length 85 [2025-03-03 13:52:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:55,425 INFO L225 Difference]: With dead ends: 228 [2025-03-03 13:52:55,425 INFO L226 Difference]: Without dead ends: 151 [2025-03-03 13:52:55,426 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=491, Invalid=2479, Unknown=0, NotChecked=0, Total=2970 [2025-03-03 13:52:55,426 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 197 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:55,426 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 488 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:52:55,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2025-03-03 13:52:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 128. [2025-03-03 13:52:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 70 states have internal predecessors, (78), 45 states have call successors, (45), 13 states have call predecessors, (45), 13 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2025-03-03 13:52:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 167 transitions. [2025-03-03 13:52:55,456 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 167 transitions. Word has length 85 [2025-03-03 13:52:55,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:55,456 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 167 transitions. [2025-03-03 13:52:55,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 28 states have internal predecessors, (53), 12 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) [2025-03-03 13:52:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 167 transitions. [2025-03-03 13:52:55,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-03-03 13:52:55,457 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:55,457 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:55,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 13:52:55,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:55,658 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:55,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:55,658 INFO L85 PathProgramCache]: Analyzing trace with hash -224873522, now seen corresponding path program 3 times [2025-03-03 13:52:55,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:55,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132061196] [2025-03-03 13:52:55,658 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:52:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:55,662 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 87 statements into 6 equivalence classes. [2025-03-03 13:52:55,670 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 72 of 87 statements. [2025-03-03 13:52:55,670 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:52:55,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2025-03-03 13:52:55,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:55,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132061196] [2025-03-03 13:52:55,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132061196] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:55,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244197867] [2025-03-03 13:52:55,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:52:55,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:55,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:55,835 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:55,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 13:52:55,857 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 87 statements into 6 equivalence classes. [2025-03-03 13:52:55,872 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 56 of 87 statements. [2025-03-03 13:52:55,873 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:52:55,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:55,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-03 13:52:55,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2025-03-03 13:52:55,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2025-03-03 13:52:56,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244197867] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:56,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:56,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 23 [2025-03-03 13:52:56,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969384994] [2025-03-03 13:52:56,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:56,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 13:52:56,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:56,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 13:52:56,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:52:56,111 INFO L87 Difference]: Start difference. First operand 128 states and 167 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 20 states have internal predecessors, (45), 11 states have call successors, (39), 4 states have call predecessors, (39), 2 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2025-03-03 13:52:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:56,718 INFO L93 Difference]: Finished difference Result 162 states and 203 transitions. [2025-03-03 13:52:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 13:52:56,719 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 20 states have internal predecessors, (45), 11 states have call successors, (39), 4 states have call predecessors, (39), 2 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) Word has length 87 [2025-03-03 13:52:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:56,720 INFO L225 Difference]: With dead ends: 162 [2025-03-03 13:52:56,720 INFO L226 Difference]: Without dead ends: 103 [2025-03-03 13:52:56,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 13:52:56,721 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 56 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:56,721 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 502 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:52:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-03-03 13:52:56,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2025-03-03 13:52:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-03 13:52:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2025-03-03 13:52:56,737 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 87 [2025-03-03 13:52:56,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:56,737 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2025-03-03 13:52:56,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 20 states have internal predecessors, (45), 11 states have call successors, (39), 4 states have call predecessors, (39), 2 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2025-03-03 13:52:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2025-03-03 13:52:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-03 13:52:56,738 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:56,738 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:56,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:56,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 13:52:56,939 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:56,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:56,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1015960117, now seen corresponding path program 2 times [2025-03-03 13:52:56,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:56,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031231206] [2025-03-03 13:52:56,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:56,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:56,942 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 97 statements into 2 equivalence classes. [2025-03-03 13:52:56,946 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 13:52:56,947 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:56,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2025-03-03 13:52:57,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:57,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031231206] [2025-03-03 13:52:57,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031231206] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:57,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306895003] [2025-03-03 13:52:57,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:57,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:57,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:57,105 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:57,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 13:52:57,130 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 97 statements into 2 equivalence classes. [2025-03-03 13:52:57,148 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 13:52:57,148 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:57,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:57,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-03 13:52:57,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2025-03-03 13:52:57,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2025-03-03 13:52:57,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306895003] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:57,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:57,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2025-03-03 13:52:57,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98807126] [2025-03-03 13:52:57,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:57,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 13:52:57,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:57,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 13:52:57,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:52:57,549 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 14 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (48), 12 states have call predecessors, (48), 13 states have call successors, (48) [2025-03-03 13:52:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:57,911 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2025-03-03 13:52:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:52:57,912 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 14 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (48), 12 states have call predecessors, (48), 13 states have call successors, (48) Word has length 97 [2025-03-03 13:52:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:57,913 INFO L225 Difference]: With dead ends: 85 [2025-03-03 13:52:57,913 INFO L226 Difference]: Without dead ends: 61 [2025-03-03 13:52:57,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:52:57,914 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 53 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:57,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 512 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:52:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-03 13:52:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2025-03-03 13:52:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-03 13:52:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2025-03-03 13:52:57,931 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 97 [2025-03-03 13:52:57,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:57,931 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2025-03-03 13:52:57,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 14 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (48), 12 states have call predecessors, (48), 13 states have call successors, (48) [2025-03-03 13:52:57,931 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2025-03-03 13:52:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-03-03 13:52:57,932 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:57,932 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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, 1, 1, 1, 1] [2025-03-03 13:52:57,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:58,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 13:52:58,136 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:58,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1783521350, now seen corresponding path program 3 times [2025-03-03 13:52:58,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:58,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19536725] [2025-03-03 13:52:58,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:52:58,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:58,141 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 11 equivalence classes. [2025-03-03 13:52:58,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 90 of 100 statements. [2025-03-03 13:52:58,159 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-03 13:52:58,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2025-03-03 13:52:58,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:58,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19536725] [2025-03-03 13:52:58,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19536725] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:58,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86865451] [2025-03-03 13:52:58,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:52:58,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:58,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:58,319 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:58,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 13:52:58,345 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 11 equivalence classes. [2025-03-03 13:52:58,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 54 of 100 statements. [2025-03-03 13:52:58,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:52:58,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:58,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-03 13:52:58,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 61 proven. 14 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2025-03-03 13:52:59,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:59,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86865451] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:59,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:59,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 29 [2025-03-03 13:52:59,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144260452] [2025-03-03 13:52:59,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:59,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 13:52:59,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:59,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 13:52:59,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 13:52:59,350 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 26 states have internal predecessors, (45), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2025-03-03 13:53:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:00,074 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2025-03-03 13:53:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:53:00,074 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 26 states have internal predecessors, (45), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 100 [2025-03-03 13:53:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:00,075 INFO L225 Difference]: With dead ends: 73 [2025-03-03 13:53:00,075 INFO L226 Difference]: Without dead ends: 0 [2025-03-03 13:53:00,075 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=2042, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 13:53:00,076 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:00,076 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 347 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:53:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-03 13:53:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-03 13:53:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:53:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-03 13:53:00,076 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2025-03-03 13:53:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:00,076 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-03 13:53:00,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 26 states have internal predecessors, (45), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2025-03-03 13:53:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-03 13:53:00,077 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-03 13:53:00,078 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-03 13:53:00,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:00,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:00,281 INFO L422 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:00,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-03 13:53:03,212 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-03 13:53:03,226 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 01:53:03 BoogieIcfgContainer [2025-03-03 13:53:03,226 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-03 13:53:03,227 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-03 13:53:03,227 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-03 13:53:03,227 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-03 13:53:03,227 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:52:39" (3/4) ... [2025-03-03 13:53:03,229 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-03 13:53:03,235 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2025-03-03 13:53:03,235 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-03-03 13:53:03,238 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2025-03-03 13:53:03,238 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-03 13:53:03,238 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-03 13:53:03,238 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-03 13:53:03,299 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-03 13:53:03,299 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-03 13:53:03,299 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-03 13:53:03,300 INFO L158 Benchmark]: Toolchain (without parser) took 24438.82ms. Allocated memory was 167.8MB in the beginning and 520.1MB in the end (delta: 352.3MB). Free memory was 123.9MB in the beginning and 200.4MB in the end (delta: -76.4MB). Peak memory consumption was 270.7MB. Max. memory is 16.1GB. [2025-03-03 13:53:03,300 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 117.4MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 13:53:03,300 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.57ms. Allocated memory is still 167.8MB. Free memory was 123.0MB in the beginning and 111.9MB in the end (delta: 11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 13:53:03,300 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.59ms. Allocated memory is still 167.8MB. Free memory was 111.9MB in the beginning and 110.9MB in the end (delta: 980.4kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 13:53:03,301 INFO L158 Benchmark]: Boogie Preprocessor took 18.92ms. Allocated memory is still 167.8MB. Free memory was 110.9MB in the beginning and 109.4MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 13:53:03,303 INFO L158 Benchmark]: IcfgBuilder took 213.37ms. Allocated memory is still 167.8MB. Free memory was 109.4MB in the beginning and 97.1MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 13:53:03,303 INFO L158 Benchmark]: TraceAbstraction took 23939.63ms. Allocated memory was 167.8MB in the beginning and 520.1MB in the end (delta: 352.3MB). Free memory was 96.1MB in the beginning and 208.7MB in the end (delta: -112.7MB). Peak memory consumption was 272.2MB. Max. memory is 16.1GB. [2025-03-03 13:53:03,303 INFO L158 Benchmark]: Witness Printer took 72.78ms. Allocated memory is still 520.1MB. Free memory was 208.7MB in the beginning and 200.4MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 13:53:03,304 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 117.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 168.57ms. Allocated memory is still 167.8MB. Free memory was 123.0MB in the beginning and 111.9MB in the end (delta: 11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.59ms. Allocated memory is still 167.8MB. Free memory was 111.9MB in the beginning and 110.9MB in the end (delta: 980.4kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.92ms. Allocated memory is still 167.8MB. Free memory was 110.9MB in the beginning and 109.4MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 213.37ms. Allocated memory is still 167.8MB. Free memory was 109.4MB in the beginning and 97.1MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 23939.63ms. Allocated memory was 167.8MB in the beginning and 520.1MB in the end (delta: 352.3MB). Free memory was 96.1MB in the beginning and 208.7MB in the end (delta: -112.7MB). Peak memory consumption was 272.2MB. Max. memory is 16.1GB. * Witness Printer took 72.78ms. Allocated memory is still 520.1MB. Free memory was 208.7MB in the beginning and 200.4MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.0s, OverallIterations: 19, TraceHistogramMax: 13, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 928 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 854 mSDsluCounter, 4779 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4101 mSDsCounter, 894 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4980 IncrementalHoareTripleChecker+Invalid, 5874 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 894 mSolverCounterUnsat, 678 mSDtfsCounter, 4980 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1988 GetRequests, 1577 SyntacticMatches, 14 SemanticMatches, 397 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=277occurred in iteration=13, InterpolantAutomatonStates: 252, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 19 MinimizatonAttempts, 244 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 2153 NumberOfCodeBlocks, 2051 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 2406 ConstructedInterpolants, 6 QuantifiedInterpolants, 8806 SizeOfPredicates, 47 NumberOfNonLiveVariables, 2621 ConjunctsInSsa, 368 ConjunctsInUnsatCore, 38 InterpolantComputations, 7 PerfectInterpolantSequences, 4998/5383 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Location Invariant Derived location invariant: (((((((((((((((p == 0) && (a == c)) && (a <= 2)) && ((((__int128) 2 * v) + c) <= (((__int128) b * 4) + 2))) && (b == x)) && (((__int128) b + 1) <= c)) && (q == 1)) && (k == 0)) && (s == 0)) && (1 <= x)) && (r == 1)) && ((((__int128) b * d) + c) == ((__int128) a + v))) && (c == y)) || (((((((((((((p == 1) && (1 <= y)) && (a == c)) && (b == y)) && ((((__int128) b + v) < ((__int128) c + 1)) || (c == v))) && (r == 0)) && (q == 0)) && (k == 0)) && (((__int128) 2 * b) <= v)) && (a == x)) && (x <= 2)) && (2 == d)) && (s == 1))) || (((((((((((((d == 1) && (p == 1)) && (1 <= y)) && (a == c)) && (b == y)) && (b == v)) && ((((__int128) b + v) < ((__int128) c + 1)) || (c == v))) && (r == 0)) && (q == 0)) && (k == 0)) && (a == x)) && (x <= 2)) && (s == 1))) - InvariantResult [Line: 42]: Location Invariant Derived location invariant: (((((((((((((((p == 0) && (y <= 2)) && (b == x)) && ((((__int128) 2 * b) + c) == a)) && (q == 1)) && (a <= y)) && (s == 0)) && (r == 1)) && (((__int128) c + 1) <= b)) && (1 <= ((__int128) b + c))) && (2 == k)) || (((((((((((c == 0) && (b == 1)) && (p == 1)) && (r == 0)) && (q == 0)) && (y == 1)) && (1 <= x)) && (k == x)) && (a == x)) && (x <= 2)) && (s == 1))) || (((((((((((k == 1) && (p == 1)) && (b == y)) && (r == 0)) && (q == 0)) && (a == x)) && ((((__int128) 2 * c) + 1) <= x)) && (x <= 2)) && (b <= x)) && (s == 1)) && (((__int128) b + c) == x))) || ((((((((((((p == 1) && (1 <= y)) && (a == c)) && (b == y)) && (b <= 2)) && (r == 0)) && (q == 0)) && (k == 0)) && (1 <= x)) && (a == x)) && (x <= 2)) && (s == 1))) || ((((((((((((p == 0) && (a <= 2)) && (((__int128) b + 1) <= a)) && (b == x)) && (((__int128) b + 1) <= c)) && (q == 1)) && (k == 0)) && (s == 0)) && (1 <= x)) && (c <= 2)) && (r == 1)) && (c == y))) - InvariantResult [Line: 35]: Location Invariant Derived location invariant: ((((((((((((s + ((__int128) 2 * r)) == 1) && (b == 0)) && ((((__int128) p * x) + ((__int128) 2 * r)) == 1)) && (2 == y)) && (a == 1)) && (1 <= x)) && ((q + ((__int128) 2 * p)) == 0)) && (x <= 2)) || ((((((((b == 1) && (p == 0)) && (2 == y)) && (x == 1)) && (q == 1)) && (s == 0)) && (r == 1)) && (2 == a))) || (((((((((y == ((a + ((__int128) s * y)) + ((__int128) q * x))) && (p == 0)) && (a == y)) && (a <= 2)) && (b == 0)) && (1 <= a)) && (1 <= x)) && (r == 1)) && (x <= 2))) || ((((((((((p == 1) && (b == y)) && (b <= 2)) && (1 <= b)) && (r == 0)) && (q == 0)) && (1 <= x)) && (a == x)) && (x <= 2)) && (s == 1))) RESULT: Ultimate proved your program to be correct! [2025-03-03 13:53:03,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE