./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/condn.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/array-fpi/condn.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 d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:34:23,237 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:34:23,292 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:34:23,295 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:34:23,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:34:23,316 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:34:23,317 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:34:23,317 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:34:23,317 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:34:23,318 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:34:23,318 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:34:23,319 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:34:23,319 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:34:23,319 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:34:23,320 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:34:23,320 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:34:23,320 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:34:23,320 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 -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2025-03-03 09:34:23,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:34:23,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:34:23,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:34:23,560 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:34:23,560 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:34:23,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condn.c [2025-03-03 09:34:24,752 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cdc49733/0050a6bd52164817a4d5863f135599c3/FLAG0c73677ab [2025-03-03 09:34:24,923 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:34:24,924 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2025-03-03 09:34:24,946 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cdc49733/0050a6bd52164817a4d5863f135599c3/FLAG0c73677ab [2025-03-03 09:34:24,967 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cdc49733/0050a6bd52164817a4d5863f135599c3 [2025-03-03 09:34:24,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:34:24,971 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:34:24,972 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:34:24,973 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:34:24,977 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:34:24,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:34:24" (1/1) ... [2025-03-03 09:34:24,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208935bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:24, skipping insertion in model container [2025-03-03 09:34:24,980 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:34:24" (1/1) ... [2025-03-03 09:34:24,990 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:34:25,093 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/array-fpi/condn.c[588,601] [2025-03-03 09:34:25,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:34:25,116 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:34:25,124 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/array-fpi/condn.c[588,601] [2025-03-03 09:34:25,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:34:25,139 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:34:25,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25 WrapperNode [2025-03-03 09:34:25,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:34:25,140 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:34:25,140 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:34:25,140 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:34:25,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,167 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2025-03-03 09:34:25,169 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:34:25,170 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:34:25,170 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:34:25,170 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:34:25,176 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,178 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,189 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 6, 8]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8]. The 3 writes are split as follows [0, 3, 0]. [2025-03-03 09:34:25,190 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,190 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,193 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,196 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,199 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:34:25,200 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:34:25,201 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:34:25,201 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:34:25,201 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (1/1) ... [2025-03-03 09:34:25,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:34:25,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:25,229 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 09:34:25,231 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 09:34:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:34:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:34:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 09:34:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-03 09:34:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 09:34:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 09:34:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-03 09:34:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-03 09:34:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:34:25,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:34:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 09:34:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 09:34:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-03 09:34:25,292 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:34:25,293 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:34:25,416 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-03 09:34:25,416 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:34:25,425 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:34:25,426 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:34:25,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:34:25 BoogieIcfgContainer [2025-03-03 09:34:25,427 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:34:25,429 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:34:25,429 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:34:25,432 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:34:25,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:34:24" (1/3) ... [2025-03-03 09:34:25,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a72277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:34:25, skipping insertion in model container [2025-03-03 09:34:25,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:34:25" (2/3) ... [2025-03-03 09:34:25,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a72277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:34:25, skipping insertion in model container [2025-03-03 09:34:25,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:34:25" (3/3) ... [2025-03-03 09:34:25,434 INFO L128 eAbstractionObserver]: Analyzing ICFG condn.c [2025-03-03 09:34:25,446 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:34:25,447 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG condn.c that has 1 procedures, 17 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 09:34:25,487 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:34:25,494 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;@4271e438, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:34:25,494 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:34:25,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 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 09:34:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 09:34:25,499 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:25,500 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:25,500 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:25,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:25,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1259808598, now seen corresponding path program 1 times [2025-03-03 09:34:25,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:25,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704382822] [2025-03-03 09:34:25,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:34:25,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:25,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 09:34:25,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 09:34:25,569 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:25,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:34:25,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704382822] [2025-03-03 09:34:25,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704382822] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:34:25,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:34:25,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-03 09:34:25,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17168957] [2025-03-03 09:34:25,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:34:25,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 09:34:25,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:25,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 09:34:25,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 09:34:25,625 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 09:34:25,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:25,631 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2025-03-03 09:34:25,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 09:34:25,632 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) Word has length 10 [2025-03-03 09:34:25,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:25,636 INFO L225 Difference]: With dead ends: 30 [2025-03-03 09:34:25,636 INFO L226 Difference]: Without dead ends: 14 [2025-03-03 09:34:25,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 09:34:25,639 INFO L435 NwaCegarLoop]: 21 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, 21 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 09:34:25,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:34:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-03-03 09:34:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-03-03 09:34:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 09:34:25,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2025-03-03 09:34:25,656 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2025-03-03 09:34:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:25,657 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2025-03-03 09:34:25,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 09:34:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2025-03-03 09:34:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 09:34:25,657 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:25,657 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:25,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:34:25,658 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:25,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:25,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2147312279, now seen corresponding path program 1 times [2025-03-03 09:34:25,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:25,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572568220] [2025-03-03 09:34:25,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:34:25,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:25,667 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 09:34:25,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 09:34:25,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:25,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:34:25,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:25,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572568220] [2025-03-03 09:34:25,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572568220] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:34:25,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:34:25,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 09:34:25,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260351946] [2025-03-03 09:34:25,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:34:25,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 09:34:25,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:25,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 09:34:25,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 09:34:25,781 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 09:34:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:25,826 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2025-03-03 09:34:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 09:34:25,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) Word has length 10 [2025-03-03 09:34:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:25,827 INFO L225 Difference]: With dead ends: 31 [2025-03-03 09:34:25,827 INFO L226 Difference]: Without dead ends: 23 [2025-03-03 09:34:25,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 09:34:25,828 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:25,828 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 11 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:34:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-03 09:34:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2025-03-03 09:34:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 09:34:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2025-03-03 09:34:25,831 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2025-03-03 09:34:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:25,831 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2025-03-03 09:34:25,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 09:34:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2025-03-03 09:34:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-03 09:34:25,832 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:25,832 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:25,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 09:34:25,832 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:25,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1405656438, now seen corresponding path program 1 times [2025-03-03 09:34:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:25,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59054031] [2025-03-03 09:34:25,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:34:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:25,848 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 09:34:25,866 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 09:34:25,866 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:25,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 09:34:26,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:26,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59054031] [2025-03-03 09:34:26,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59054031] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:26,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127798008] [2025-03-03 09:34:26,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:34:26,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:26,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:26,237 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 09:34:26,239 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 09:34:26,278 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 09:34:26,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 09:34:26,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:26,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:26,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 09:34:26,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:26,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:34:26,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-03 09:34:26,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-03 09:34:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:34:26,437 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 09:34:26,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127798008] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:26,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:26,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2025-03-03 09:34:26,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684843616] [2025-03-03 09:34:26,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:26,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 09:34:26,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:26,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 09:34:26,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:34:26,513 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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 09:34:26,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:26,650 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2025-03-03 09:34:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 09:34:26,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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) Word has length 14 [2025-03-03 09:34:26,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:26,651 INFO L225 Difference]: With dead ends: 36 [2025-03-03 09:34:26,651 INFO L226 Difference]: Without dead ends: 34 [2025-03-03 09:34:26,651 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2025-03-03 09:34:26,651 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:26,652 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 41 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:34:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-03 09:34:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 18. [2025-03-03 09:34:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 09:34:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2025-03-03 09:34:26,658 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 14 [2025-03-03 09:34:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:26,659 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2025-03-03 09:34:26,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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 09:34:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2025-03-03 09:34:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-03 09:34:26,659 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:26,659 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:26,665 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 09:34:26,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:26,864 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:26,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash -19319724, now seen corresponding path program 1 times [2025-03-03 09:34:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:26,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499042365] [2025-03-03 09:34:26,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:34:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:26,892 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-03 09:34:26,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 09:34:26,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:26,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 09:34:26,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:26,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499042365] [2025-03-03 09:34:26,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499042365] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:26,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870665033] [2025-03-03 09:34:26,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:34:26,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:26,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:26,963 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 09:34:26,964 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 09:34:26,993 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-03 09:34:27,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 09:34:27,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:27,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:27,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:34:27,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 09:34:27,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 09:34:27,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870665033] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:27,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:27,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-03 09:34:27,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102251606] [2025-03-03 09:34:27,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:27,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 09:34:27,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:27,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 09:34:27,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-03 09:34:27,095 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 09:34:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:27,167 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2025-03-03 09:34:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 09:34:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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) Word has length 17 [2025-03-03 09:34:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:27,167 INFO L225 Difference]: With dead ends: 48 [2025-03-03 09:34:27,167 INFO L226 Difference]: Without dead ends: 30 [2025-03-03 09:34:27,168 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-03-03 09:34:27,168 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:27,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:34:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-03 09:34:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2025-03-03 09:34:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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 09:34:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2025-03-03 09:34:27,172 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2025-03-03 09:34:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:27,172 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2025-03-03 09:34:27,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 09:34:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2025-03-03 09:34:27,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-03 09:34:27,172 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:27,173 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:27,178 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 09:34:27,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-03 09:34:27,377 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:27,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:27,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1490336141, now seen corresponding path program 2 times [2025-03-03 09:34:27,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:27,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384680089] [2025-03-03 09:34:27,378 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:34:27,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:27,385 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-03 09:34:27,402 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 09:34:27,403 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:34:27,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 09:34:27,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:27,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384680089] [2025-03-03 09:34:27,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384680089] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:27,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940636823] [2025-03-03 09:34:27,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:34:27,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:27,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:27,700 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 09:34:27,702 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 09:34:27,735 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-03 09:34:27,752 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 09:34:27,752 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:34:27,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:27,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-03 09:34:27,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:27,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:34:27,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:27,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-03 09:34:28,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2025-03-03 09:34:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:34:28,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 09:34:28,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940636823] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:28,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:28,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 27 [2025-03-03 09:34:28,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803652823] [2025-03-03 09:34:28,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:28,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 09:34:28,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:28,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 09:34:28,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2025-03-03 09:34:28,291 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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 09:34:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:28,619 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2025-03-03 09:34:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 09:34:28,620 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) Word has length 21 [2025-03-03 09:34:28,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:28,620 INFO L225 Difference]: With dead ends: 47 [2025-03-03 09:34:28,620 INFO L226 Difference]: Without dead ends: 45 [2025-03-03 09:34:28,621 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 09:34:28,622 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 121 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:28,622 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 46 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:34:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-03 09:34:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 25. [2025-03-03 09:34:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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 09:34:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2025-03-03 09:34:28,626 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2025-03-03 09:34:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:28,627 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2025-03-03 09:34:28,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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 09:34:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2025-03-03 09:34:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 09:34:28,627 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:28,627 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:28,633 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 09:34:28,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:28,832 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:28,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:28,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1526165961, now seen corresponding path program 3 times [2025-03-03 09:34:28,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:28,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128201666] [2025-03-03 09:34:28,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:34:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:28,841 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-03-03 09:34:28,852 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 09:34:28,852 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:34:28,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 09:34:28,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:28,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128201666] [2025-03-03 09:34:28,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128201666] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:28,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578189555] [2025-03-03 09:34:28,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:34:28,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:28,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:28,941 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 09:34:28,943 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 09:34:28,979 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-03-03 09:34:28,997 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 09:34:28,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:34:28,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:28,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 09:34:28,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 09:34:29,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 09:34:29,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578189555] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:29,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:29,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-03-03 09:34:29,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113749339] [2025-03-03 09:34:29,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:29,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 09:34:29,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:29,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 09:34:29,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:34:29,116 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 09:34:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:29,229 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2025-03-03 09:34:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 09:34:29,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) Word has length 24 [2025-03-03 09:34:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:29,229 INFO L225 Difference]: With dead ends: 64 [2025-03-03 09:34:29,230 INFO L226 Difference]: Without dead ends: 37 [2025-03-03 09:34:29,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:34:29,230 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:29,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 51 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:34:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-03 09:34:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2025-03-03 09:34:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 09:34:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2025-03-03 09:34:29,235 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 24 [2025-03-03 09:34:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:29,235 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2025-03-03 09:34:29,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 09:34:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2025-03-03 09:34:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-03 09:34:29,235 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:29,235 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:29,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 09:34:29,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:29,436 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:29,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:29,437 INFO L85 PathProgramCache]: Analyzing trace with hash 315277974, now seen corresponding path program 4 times [2025-03-03 09:34:29,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:29,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079455748] [2025-03-03 09:34:29,437 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:34:29,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:29,448 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-03 09:34:29,457 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 28 statements. [2025-03-03 09:34:29,458 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:34:29,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:34:29,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:29,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079455748] [2025-03-03 09:34:29,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079455748] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:29,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319109797] [2025-03-03 09:34:29,665 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:34:29,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:29,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:29,667 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 09:34:29,668 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 09:34:29,706 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-03 09:34:29,714 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 28 statements. [2025-03-03 09:34:29,714 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:34:29,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:29,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 09:34:29,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:29,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2025-03-03 09:34:29,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2025-03-03 09:34:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:34:29,828 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:29,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2025-03-03 09:34:29,933 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-03 09:34:29,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2025-03-03 09:34:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:34:29,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319109797] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:29,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:29,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2025-03-03 09:34:29,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181152978] [2025-03-03 09:34:29,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:29,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 09:34:29,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:29,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 09:34:29,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-03-03 09:34:29,943 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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 09:34:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:30,229 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2025-03-03 09:34:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 09:34:30,229 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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) Word has length 28 [2025-03-03 09:34:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:30,230 INFO L225 Difference]: With dead ends: 58 [2025-03-03 09:34:30,230 INFO L226 Difference]: Without dead ends: 56 [2025-03-03 09:34:30,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2025-03-03 09:34:30,230 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:30,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 84 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:34:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-03 09:34:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2025-03-03 09:34:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 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 09:34:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2025-03-03 09:34:30,235 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 28 [2025-03-03 09:34:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:30,236 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2025-03-03 09:34:30,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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 09:34:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2025-03-03 09:34:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-03 09:34:30,236 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:30,236 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:30,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 09:34:30,436 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 09:34:30,437 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:30,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:30,437 INFO L85 PathProgramCache]: Analyzing trace with hash -646481100, now seen corresponding path program 5 times [2025-03-03 09:34:30,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:30,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174696064] [2025-03-03 09:34:30,437 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:34:30,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:30,445 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 4 equivalence classes. [2025-03-03 09:34:30,453 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-03-03 09:34:30,454 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-03 09:34:30,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:34:30,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:30,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174696064] [2025-03-03 09:34:30,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174696064] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:30,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973758931] [2025-03-03 09:34:30,551 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:34:30,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:30,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:30,552 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 09:34:30,554 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 09:34:30,591 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 4 equivalence classes. [2025-03-03 09:34:30,611 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-03-03 09:34:30,611 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-03 09:34:30,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:30,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 09:34:30,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:34:30,684 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:34:30,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973758931] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:30,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:30,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2025-03-03 09:34:30,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786825004] [2025-03-03 09:34:30,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:30,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 09:34:30,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:30,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 09:34:30,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:34:30,731 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 09:34:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:30,825 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2025-03-03 09:34:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 09:34:30,825 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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) Word has length 31 [2025-03-03 09:34:30,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:30,826 INFO L225 Difference]: With dead ends: 80 [2025-03-03 09:34:30,826 INFO L226 Difference]: Without dead ends: 44 [2025-03-03 09:34:30,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2025-03-03 09:34:30,827 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:30,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 43 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:34:30,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-03 09:34:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2025-03-03 09:34:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 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 09:34:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2025-03-03 09:34:30,831 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 31 [2025-03-03 09:34:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:30,831 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2025-03-03 09:34:30,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 09:34:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2025-03-03 09:34:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-03 09:34:30,832 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:30,832 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:30,838 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 09:34:31,032 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 09:34:31,033 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:31,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash 837224147, now seen corresponding path program 6 times [2025-03-03 09:34:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:31,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451099468] [2025-03-03 09:34:31,033 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:34:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:31,042 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 35 statements into 5 equivalence classes. [2025-03-03 09:34:31,075 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 09:34:31,075 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 09:34:31,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 09:34:31,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:31,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451099468] [2025-03-03 09:34:31,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451099468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:31,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518110261] [2025-03-03 09:34:31,502 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:34:31,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:31,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:31,505 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 09:34:31,506 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 09:34:31,547 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 35 statements into 5 equivalence classes. [2025-03-03 09:34:31,568 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 09:34:31,568 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 09:34:31,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:31,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-03 09:34:31,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:31,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-03 09:34:31,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:34:31,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-03 09:34:31,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:34:31,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2025-03-03 09:34:31,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:34:31,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2025-03-03 09:34:31,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:34:31,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2025-03-03 09:34:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 09:34:31,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:32,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2025-03-03 09:34:32,328 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2025-03-03 09:34:32,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 81 [2025-03-03 09:34:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 09:34:32,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518110261] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:32,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:32,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 16] total 41 [2025-03-03 09:34:32,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743464167] [2025-03-03 09:34:32,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:32,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-03 09:34:32,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:32,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-03 09:34:32,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 09:34:32,361 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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 09:34:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:33,528 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2025-03-03 09:34:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-03 09:34:33,529 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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) Word has length 35 [2025-03-03 09:34:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:33,530 INFO L225 Difference]: With dead ends: 125 [2025-03-03 09:34:33,530 INFO L226 Difference]: Without dead ends: 123 [2025-03-03 09:34:33,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=869, Invalid=4101, Unknown=0, NotChecked=0, Total=4970 [2025-03-03 09:34:33,532 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 161 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:33,532 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 171 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:34:33,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-03-03 09:34:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 51. [2025-03-03 09:34:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 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 09:34:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2025-03-03 09:34:33,547 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 35 [2025-03-03 09:34:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:33,547 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2025-03-03 09:34:33,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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 09:34:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2025-03-03 09:34:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-03 09:34:33,549 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:33,549 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:33,555 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 09:34:33,750 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 09:34:33,750 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:33,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2017198093, now seen corresponding path program 1 times [2025-03-03 09:34:33,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:33,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411582146] [2025-03-03 09:34:33,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:34:33,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:33,760 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-03 09:34:33,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 09:34:33,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:33,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:34:34,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:34,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411582146] [2025-03-03 09:34:34,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411582146] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:34,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823644476] [2025-03-03 09:34:34,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:34:34,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:34,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:34,128 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 09:34:34,129 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 09:34:34,167 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-03 09:34:34,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 09:34:34,185 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:34,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:34,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-03 09:34:34,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:34,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:34:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 09:34:34,327 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:34,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2025-03-03 09:34:34,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2025-03-03 09:34:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 09:34:34,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823644476] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:34,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:34,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 12] total 33 [2025-03-03 09:34:34,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550550822] [2025-03-03 09:34:34,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:34,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-03 09:34:34,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:34,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-03 09:34:34,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 09:34:34,467 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 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 09:34:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:34,941 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2025-03-03 09:34:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 09:34:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 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) Word has length 35 [2025-03-03 09:34:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:34,942 INFO L225 Difference]: With dead ends: 96 [2025-03-03 09:34:34,942 INFO L226 Difference]: Without dead ends: 94 [2025-03-03 09:34:34,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=1973, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 09:34:34,943 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 128 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:34,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 198 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 09:34:34,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-03-03 09:34:34,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 39. [2025-03-03 09:34:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 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 09:34:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2025-03-03 09:34:34,949 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 35 [2025-03-03 09:34:34,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:34,949 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2025-03-03 09:34:34,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 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 09:34:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2025-03-03 09:34:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-03 09:34:34,949 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:34,949 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:34,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 09:34:35,153 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 09:34:35,154 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:35,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:35,154 INFO L85 PathProgramCache]: Analyzing trace with hash 870347223, now seen corresponding path program 7 times [2025-03-03 09:34:35,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:35,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998594615] [2025-03-03 09:34:35,154 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:34:35,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:35,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 09:34:35,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 09:34:35,164 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:35,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:34:35,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998594615] [2025-03-03 09:34:35,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998594615] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588873270] [2025-03-03 09:34:35,273 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:34:35,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:35,277 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 09:34:35,284 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 09:34:35,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 09:34:35,355 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 09:34:35,355 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:35,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:35,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 09:34:35,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:34:35,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:34:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588873270] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:35,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:35,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2025-03-03 09:34:35,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037776231] [2025-03-03 09:34:35,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:35,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 09:34:35,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:35,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 09:34:35,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2025-03-03 09:34:35,521 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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 09:34:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:35,670 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2025-03-03 09:34:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 09:34:35,671 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) Word has length 38 [2025-03-03 09:34:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:35,671 INFO L225 Difference]: With dead ends: 96 [2025-03-03 09:34:35,671 INFO L226 Difference]: Without dead ends: 51 [2025-03-03 09:34:35,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2025-03-03 09:34:35,672 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:35,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 65 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:34:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-03 09:34:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2025-03-03 09:34:35,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 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 09:34:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2025-03-03 09:34:35,682 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 38 [2025-03-03 09:34:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:35,682 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2025-03-03 09:34:35,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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 09:34:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2025-03-03 09:34:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-03 09:34:35,684 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:35,684 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:35,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 09:34:35,884 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 09:34:35,884 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:35,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1553768522, now seen corresponding path program 8 times [2025-03-03 09:34:35,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:35,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822099196] [2025-03-03 09:34:35,885 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:34:35,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:35,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-03 09:34:35,905 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-03 09:34:35,907 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:34:35,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:34:36,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:36,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822099196] [2025-03-03 09:34:36,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822099196] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:36,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297578285] [2025-03-03 09:34:36,520 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:34:36,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:36,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:36,522 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 09:34:36,523 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 09:34:36,565 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-03 09:34:36,586 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-03 09:34:36,586 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:34:36,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:36,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-03 09:34:36,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:36,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:34:36,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:36,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:36,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:36,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:36,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-03 09:34:36,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-03 09:34:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:34:36,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 09:34:37,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297578285] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:37,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:37,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 15] total 48 [2025-03-03 09:34:37,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041434819] [2025-03-03 09:34:37,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:37,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-03 09:34:37,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:37,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-03 09:34:37,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2015, Unknown=0, NotChecked=0, Total=2256 [2025-03-03 09:34:37,320 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 48 states, 48 states have (on average 2.3125) internal successors, (111), 48 states have internal predecessors, (111), 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 09:34:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:38,895 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2025-03-03 09:34:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2025-03-03 09:34:38,895 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3125) internal successors, (111), 48 states have internal predecessors, (111), 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) Word has length 42 [2025-03-03 09:34:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:38,896 INFO L225 Difference]: With dead ends: 169 [2025-03-03 09:34:38,896 INFO L226 Difference]: Without dead ends: 128 [2025-03-03 09:34:38,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2886 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1228, Invalid=8672, Unknown=0, NotChecked=0, Total=9900 [2025-03-03 09:34:38,898 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 327 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:38,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 261 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 09:34:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-03 09:34:38,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 64. [2025-03-03 09:34:38,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 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 09:34:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2025-03-03 09:34:38,906 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 42 [2025-03-03 09:34:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:38,906 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2025-03-03 09:34:38,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3125) internal successors, (111), 48 states have internal predecessors, (111), 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 09:34:38,907 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2025-03-03 09:34:38,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-03 09:34:38,909 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:38,909 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:38,915 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 09:34:39,109 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 09:34:39,110 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:39,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:39,110 INFO L85 PathProgramCache]: Analyzing trace with hash 699728503, now seen corresponding path program 2 times [2025-03-03 09:34:39,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:39,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053237112] [2025-03-03 09:34:39,110 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:34:39,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:39,118 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 48 statements into 2 equivalence classes. [2025-03-03 09:34:39,125 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-03 09:34:39,125 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:34:39,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 09:34:39,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:39,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053237112] [2025-03-03 09:34:39,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053237112] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:39,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042658444] [2025-03-03 09:34:39,243 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:34:39,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:39,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:39,245 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 09:34:39,247 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 09:34:39,298 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 48 statements into 2 equivalence classes. [2025-03-03 09:34:39,320 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-03 09:34:39,320 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:34:39,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:39,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 09:34:39,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 09:34:39,419 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 09:34:39,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042658444] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:39,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:39,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2025-03-03 09:34:39,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306895641] [2025-03-03 09:34:39,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:39,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 09:34:39,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:39,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 09:34:39,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2025-03-03 09:34:39,523 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 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 09:34:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:39,642 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2025-03-03 09:34:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 09:34:39,643 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 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) Word has length 48 [2025-03-03 09:34:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:39,643 INFO L225 Difference]: With dead ends: 103 [2025-03-03 09:34:39,644 INFO L226 Difference]: Without dead ends: 58 [2025-03-03 09:34:39,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 78 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2025-03-03 09:34:39,645 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:39,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 44 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:34:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-03 09:34:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2025-03-03 09:34:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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 09:34:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2025-03-03 09:34:39,654 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 48 [2025-03-03 09:34:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:39,654 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2025-03-03 09:34:39,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 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 09:34:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2025-03-03 09:34:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 09:34:39,655 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:39,655 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:39,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 09:34:39,856 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 09:34:39,856 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:39,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash -847573197, now seen corresponding path program 9 times [2025-03-03 09:34:39,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:39,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722958056] [2025-03-03 09:34:39,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:34:39,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:39,864 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 7 equivalence classes. [2025-03-03 09:34:39,889 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 46 of 49 statements. [2025-03-03 09:34:39,889 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 09:34:39,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 34 proven. 43 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-03 09:34:40,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:40,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722958056] [2025-03-03 09:34:40,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722958056] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:40,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933414457] [2025-03-03 09:34:40,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:34:40,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:40,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:40,334 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 09:34:40,336 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 09:34:40,386 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 7 equivalence classes. [2025-03-03 09:34:40,425 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 46 of 49 statements. [2025-03-03 09:34:40,425 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 09:34:40,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:40,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-03 09:34:40,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:40,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2025-03-03 09:34:40,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-03-03 09:34:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-03 09:34:40,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:41,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2025-03-03 09:34:41,176 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-03 09:34:41,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 25 [2025-03-03 09:34:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-03 09:34:41,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933414457] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:41,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:41,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 49 [2025-03-03 09:34:41,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219663826] [2025-03-03 09:34:41,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:41,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-03 09:34:41,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:41,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-03 09:34:41,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2013, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 09:34:41,223 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 49 states, 49 states have (on average 1.836734693877551) internal successors, (90), 49 states have internal predecessors, (90), 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 09:34:43,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:43,361 INFO L93 Difference]: Finished difference Result 208 states and 245 transitions. [2025-03-03 09:34:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2025-03-03 09:34:43,362 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.836734693877551) internal successors, (90), 49 states have internal predecessors, (90), 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) Word has length 49 [2025-03-03 09:34:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:43,362 INFO L225 Difference]: With dead ends: 208 [2025-03-03 09:34:43,362 INFO L226 Difference]: Without dead ends: 104 [2025-03-03 09:34:43,366 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5486 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2223, Invalid=14547, Unknown=0, NotChecked=0, Total=16770 [2025-03-03 09:34:43,367 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 451 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:43,367 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 270 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 09:34:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-03 09:34:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 62. [2025-03-03 09:34:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 61 states have internal predecessors, (73), 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 09:34:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2025-03-03 09:34:43,379 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 49 [2025-03-03 09:34:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:43,379 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2025-03-03 09:34:43,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.836734693877551) internal successors, (90), 49 states have internal predecessors, (90), 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 09:34:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2025-03-03 09:34:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 09:34:43,379 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:43,380 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:43,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 09:34:43,580 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 09:34:43,580 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:43,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1049953228, now seen corresponding path program 10 times [2025-03-03 09:34:43,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:43,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770317087] [2025-03-03 09:34:43,581 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:34:43,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:43,588 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-03-03 09:34:43,593 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 42 of 53 statements. [2025-03-03 09:34:43,593 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:34:43,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-03 09:34:43,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:43,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770317087] [2025-03-03 09:34:43,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770317087] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:43,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174694793] [2025-03-03 09:34:43,844 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:34:43,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:43,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:43,846 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 09:34:43,848 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 09:34:43,902 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-03-03 09:34:43,916 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 42 of 53 statements. [2025-03-03 09:34:43,916 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:34:43,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:43,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-03 09:34:43,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:43,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2025-03-03 09:34:43,992 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-03 09:34:43,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2025-03-03 09:34:44,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2025-03-03 09:34:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-03 09:34:44,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:44,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2025-03-03 09:34:44,324 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-03 09:34:44,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2025-03-03 09:34:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-03 09:34:44,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174694793] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:44,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:44,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 33 [2025-03-03 09:34:44,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385586629] [2025-03-03 09:34:44,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:44,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-03 09:34:44,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:44,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-03 09:34:44,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 09:34:44,345 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 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 09:34:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:44,914 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2025-03-03 09:34:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-03 09:34:44,914 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 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) Word has length 53 [2025-03-03 09:34:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:44,915 INFO L225 Difference]: With dead ends: 115 [2025-03-03 09:34:44,915 INFO L226 Difference]: Without dead ends: 113 [2025-03-03 09:34:44,915 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=1972, Unknown=0, NotChecked=0, Total=2162 [2025-03-03 09:34:44,916 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:44,916 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 204 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:34:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-03-03 09:34:44,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 57. [2025-03-03 09:34:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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 09:34:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2025-03-03 09:34:44,925 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 53 [2025-03-03 09:34:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:44,925 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2025-03-03 09:34:44,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 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 09:34:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2025-03-03 09:34:44,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-03 09:34:44,926 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:44,926 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:44,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 09:34:45,130 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 09:34:45,130 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:45,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:45,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1091073238, now seen corresponding path program 11 times [2025-03-03 09:34:45,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:45,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686852994] [2025-03-03 09:34:45,130 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:34:45,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:45,139 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 56 statements into 8 equivalence classes. [2025-03-03 09:34:45,183 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 56 of 56 statements. [2025-03-03 09:34:45,183 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-03 09:34:45,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-03 09:34:45,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:45,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686852994] [2025-03-03 09:34:45,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686852994] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:45,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737216872] [2025-03-03 09:34:45,528 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:34:45,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:45,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:45,530 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 09:34:45,536 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 09:34:45,592 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 56 statements into 8 equivalence classes. [2025-03-03 09:34:45,637 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 56 of 56 statements. [2025-03-03 09:34:45,637 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-03 09:34:45,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:45,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-03 09:34:45,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:45,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:34:45,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:45,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:45,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:45,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:45,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:45,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:45,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-03 09:34:46,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-03 09:34:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:34:46,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-03 09:34:46,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737216872] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:46,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:46,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 54 [2025-03-03 09:34:46,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32517539] [2025-03-03 09:34:46,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:46,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-03-03 09:34:46,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:46,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-03-03 09:34:46,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2639, Unknown=0, NotChecked=0, Total=2862 [2025-03-03 09:34:46,633 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 54 states, 54 states have (on average 2.6481481481481484) internal successors, (143), 54 states have internal predecessors, (143), 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 09:34:47,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:47,482 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2025-03-03 09:34:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-03 09:34:47,483 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6481481481481484) internal successors, (143), 54 states have internal predecessors, (143), 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) Word has length 56 [2025-03-03 09:34:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:47,483 INFO L225 Difference]: With dead ends: 102 [2025-03-03 09:34:47,483 INFO L226 Difference]: Without dead ends: 100 [2025-03-03 09:34:47,484 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=397, Invalid=4715, Unknown=0, NotChecked=0, Total=5112 [2025-03-03 09:34:47,484 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 124 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:47,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 273 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 09:34:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-03 09:34:47,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 60. [2025-03-03 09:34:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 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 09:34:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2025-03-03 09:34:47,493 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 56 [2025-03-03 09:34:47,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:47,493 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2025-03-03 09:34:47,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.6481481481481484) internal successors, (143), 54 states have internal predecessors, (143), 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 09:34:47,493 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2025-03-03 09:34:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-03 09:34:47,493 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:47,493 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:47,499 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 09:34:47,694 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 09:34:47,694 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:47,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:47,694 INFO L85 PathProgramCache]: Analyzing trace with hash -148791052, now seen corresponding path program 12 times [2025-03-03 09:34:47,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:47,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976828884] [2025-03-03 09:34:47,694 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:34:47,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:47,701 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 59 statements into 8 equivalence classes. [2025-03-03 09:34:47,721 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 59 of 59 statements. [2025-03-03 09:34:47,722 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-03 09:34:47,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-03 09:34:47,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976828884] [2025-03-03 09:34:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976828884] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610088737] [2025-03-03 09:34:47,912 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:34:47,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:47,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:47,914 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 09:34:47,915 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 09:34:47,976 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 59 statements into 8 equivalence classes. [2025-03-03 09:34:48,019 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 59 of 59 statements. [2025-03-03 09:34:48,019 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-03 09:34:48,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:48,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 09:34:48,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-03 09:34:48,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-03 09:34:48,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610088737] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:48,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:48,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2025-03-03 09:34:48,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976511476] [2025-03-03 09:34:48,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:48,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 09:34:48,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:48,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 09:34:48,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2025-03-03 09:34:48,311 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 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 09:34:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:48,470 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2025-03-03 09:34:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 09:34:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 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) Word has length 59 [2025-03-03 09:34:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:48,471 INFO L225 Difference]: With dead ends: 144 [2025-03-03 09:34:48,471 INFO L226 Difference]: Without dead ends: 72 [2025-03-03 09:34:48,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 09:34:48,472 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 223 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:48,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 72 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:34:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-03-03 09:34:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2025-03-03 09:34:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 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 09:34:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2025-03-03 09:34:48,481 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 59 [2025-03-03 09:34:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:48,481 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2025-03-03 09:34:48,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 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 09:34:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2025-03-03 09:34:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-03 09:34:48,482 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:48,482 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:48,488 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 09:34:48,682 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 09:34:48,682 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:48,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:48,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1190043757, now seen corresponding path program 13 times [2025-03-03 09:34:48,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:48,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973469091] [2025-03-03 09:34:48,682 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:34:48,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:48,691 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-03 09:34:48,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-03 09:34:48,702 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:48,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:34:49,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:49,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973469091] [2025-03-03 09:34:49,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973469091] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:49,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688021851] [2025-03-03 09:34:49,628 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:34:49,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:49,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:49,630 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 09:34:49,631 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 09:34:49,702 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-03 09:34:49,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-03 09:34:49,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:34:49,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:49,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-03-03 09:34:49,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:49,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:34:49,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:49,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:49,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:49,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:49,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:49,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:49,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:49,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-03 09:34:50,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-03 09:34:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:34:50,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 09:34:51,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688021851] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:51,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:51,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 22, 21] total 69 [2025-03-03 09:34:51,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914797377] [2025-03-03 09:34:51,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:51,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2025-03-03 09:34:51,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:51,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2025-03-03 09:34:51,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=4364, Unknown=0, NotChecked=0, Total=4692 [2025-03-03 09:34:51,077 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 69 states, 69 states have (on average 2.4782608695652173) internal successors, (171), 69 states have internal predecessors, (171), 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 09:34:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:52,749 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2025-03-03 09:34:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-03 09:34:52,749 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.4782608695652173) internal successors, (171), 69 states have internal predecessors, (171), 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) Word has length 63 [2025-03-03 09:34:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:52,750 INFO L225 Difference]: With dead ends: 113 [2025-03-03 09:34:52,750 INFO L226 Difference]: Without dead ends: 111 [2025-03-03 09:34:52,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3037 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1043, Invalid=10513, Unknown=0, NotChecked=0, Total=11556 [2025-03-03 09:34:52,751 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 337 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:52,751 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 322 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 09:34:52,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-03 09:34:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 67. [2025-03-03 09:34:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 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 09:34:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2025-03-03 09:34:52,762 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 63 [2025-03-03 09:34:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:52,763 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2025-03-03 09:34:52,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.4782608695652173) internal successors, (171), 69 states have internal predecessors, (171), 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 09:34:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2025-03-03 09:34:52,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-03 09:34:52,763 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:52,763 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:52,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-03 09:34:52,963 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 09:34:52,964 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:52,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:52,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1932631785, now seen corresponding path program 14 times [2025-03-03 09:34:52,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:52,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007653770] [2025-03-03 09:34:52,964 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:34:52,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:52,973 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 66 statements into 2 equivalence classes. [2025-03-03 09:34:52,979 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 66 of 66 statements. [2025-03-03 09:34:52,979 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:34:52,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-03 09:34:53,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:53,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007653770] [2025-03-03 09:34:53,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007653770] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:53,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696932301] [2025-03-03 09:34:53,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:34:53,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:53,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:53,177 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 09:34:53,179 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 09:34:53,252 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 66 statements into 2 equivalence classes. [2025-03-03 09:34:53,276 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 66 of 66 statements. [2025-03-03 09:34:53,276 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:34:53,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:53,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 09:34:53,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-03 09:34:53,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-03 09:34:53,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696932301] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:53,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:53,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2025-03-03 09:34:53,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083082014] [2025-03-03 09:34:53,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:53,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 09:34:53,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:53,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 09:34:53,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2025-03-03 09:34:53,610 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 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 09:34:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:34:53,819 INFO L93 Difference]: Finished difference Result 160 states and 185 transitions. [2025-03-03 09:34:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 09:34:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 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) Word has length 66 [2025-03-03 09:34:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:34:53,820 INFO L225 Difference]: With dead ends: 160 [2025-03-03 09:34:53,820 INFO L226 Difference]: Without dead ends: 79 [2025-03-03 09:34:53,821 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 104 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 09:34:53,821 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 245 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:34:53,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 96 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:34:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-03 09:34:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2025-03-03 09:34:53,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 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 09:34:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2025-03-03 09:34:53,832 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 66 [2025-03-03 09:34:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:34:53,832 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2025-03-03 09:34:53,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 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 09:34:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2025-03-03 09:34:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-03 09:34:53,833 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:34:53,833 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:34:53,839 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 09:34:54,033 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 09:34:54,033 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:34:54,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:34:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2024800758, now seen corresponding path program 15 times [2025-03-03 09:34:54,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:34:54,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658582015] [2025-03-03 09:34:54,034 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:34:54,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:34:54,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 70 statements into 10 equivalence classes. [2025-03-03 09:34:54,070 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 67 of 70 statements. [2025-03-03 09:34:54,070 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-03 09:34:54,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 63 proven. 115 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 09:34:54,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:34:54,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658582015] [2025-03-03 09:34:54,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658582015] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:34:54,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799512891] [2025-03-03 09:34:54,585 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:34:54,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:34:54,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:34:54,587 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:34:54,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 09:34:54,657 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 70 statements into 10 equivalence classes. [2025-03-03 09:34:54,811 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 67 of 70 statements. [2025-03-03 09:34:54,811 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-03 09:34:54,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:34:54,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-03-03 09:34:54,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:34:55,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2025-03-03 09:34:55,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:34:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 19 proven. 192 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-03 09:34:55,485 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:34:55,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2025-03-03 09:34:55,854 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-03 09:34:55,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2025-03-03 09:34:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-03 09:34:56,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799512891] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:34:56,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:34:56,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 31] total 72 [2025-03-03 09:34:56,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593228121] [2025-03-03 09:34:56,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:34:56,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2025-03-03 09:34:56,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:34:56,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2025-03-03 09:34:56,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4183, Unknown=0, NotChecked=0, Total=5112 [2025-03-03 09:34:56,075 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 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 09:35:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:00,489 INFO L93 Difference]: Finished difference Result 308 states and 350 transitions. [2025-03-03 09:35:00,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2025-03-03 09:35:00,491 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 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) Word has length 70 [2025-03-03 09:35:00,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:00,492 INFO L225 Difference]: With dead ends: 308 [2025-03-03 09:35:00,492 INFO L226 Difference]: Without dead ends: 136 [2025-03-03 09:35:00,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 83 SyntacticMatches, 12 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24649 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=8819, Invalid=55951, Unknown=0, NotChecked=0, Total=64770 [2025-03-03 09:35:00,498 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 759 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1921 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 1921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:00,498 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 392 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 1921 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-03 09:35:00,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2025-03-03 09:35:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 83. [2025-03-03 09:35:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 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 09:35:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2025-03-03 09:35:00,517 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 70 [2025-03-03 09:35:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:00,518 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2025-03-03 09:35:00,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 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 09:35:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2025-03-03 09:35:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-03-03 09:35:00,518 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:00,518 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:00,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 09:35:00,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:00,719 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:00,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:00,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1832741321, now seen corresponding path program 16 times [2025-03-03 09:35:00,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:00,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048173919] [2025-03-03 09:35:00,719 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:35:00,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:00,731 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 74 statements into 2 equivalence classes. [2025-03-03 09:35:00,737 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 60 of 74 statements. [2025-03-03 09:35:00,738 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:35:00,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-03-03 09:35:01,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:01,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048173919] [2025-03-03 09:35:01,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048173919] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:01,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96161995] [2025-03-03 09:35:01,072 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:35:01,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:01,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:01,073 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:01,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 09:35:01,150 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 74 statements into 2 equivalence classes. [2025-03-03 09:35:01,166 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 60 of 74 statements. [2025-03-03 09:35:01,166 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:35:01,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:01,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-03 09:35:01,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:01,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2025-03-03 09:35:01,215 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-03 09:35:01,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2025-03-03 09:35:01,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2025-03-03 09:35:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-03 09:35:01,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:01,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2025-03-03 09:35:01,743 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-03 09:35:01,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2025-03-03 09:35:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-03 09:35:01,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96161995] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:01,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:01,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 45 [2025-03-03 09:35:01,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763835031] [2025-03-03 09:35:01,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:01,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-03 09:35:01,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:01,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-03 09:35:01,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1832, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 09:35:01,761 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 45 states, 45 states have (on average 2.7777777777777777) internal successors, (125), 45 states have internal predecessors, (125), 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 09:35:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:02,800 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2025-03-03 09:35:02,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-03-03 09:35:02,800 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.7777777777777777) internal successors, (125), 45 states have internal predecessors, (125), 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) Word has length 74 [2025-03-03 09:35:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:02,801 INFO L225 Difference]: With dead ends: 156 [2025-03-03 09:35:02,802 INFO L226 Difference]: Without dead ends: 154 [2025-03-03 09:35:02,802 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=262, Invalid=3898, Unknown=0, NotChecked=0, Total=4160 [2025-03-03 09:35:02,803 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:02,803 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 527 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2881 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 09:35:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-03-03 09:35:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 83. [2025-03-03 09:35:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 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 09:35:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2025-03-03 09:35:02,820 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 74 [2025-03-03 09:35:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:02,820 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2025-03-03 09:35:02,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.7777777777777777) internal successors, (125), 45 states have internal predecessors, (125), 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 09:35:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2025-03-03 09:35:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-03-03 09:35:02,820 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:02,820 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:02,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-03 09:35:03,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:03,021 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:03,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1571555341, now seen corresponding path program 17 times [2025-03-03 09:35:03,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:03,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162418170] [2025-03-03 09:35:03,021 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:35:03,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:03,030 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 77 statements into 11 equivalence classes. [2025-03-03 09:35:03,058 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 77 of 77 statements. [2025-03-03 09:35:03,058 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 09:35:03,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 09:35:03,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:03,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162418170] [2025-03-03 09:35:03,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162418170] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:03,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649517389] [2025-03-03 09:35:03,541 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:35:03,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:03,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:03,543 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:03,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 09:35:03,635 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 77 statements into 11 equivalence classes. [2025-03-03 09:35:03,720 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 77 of 77 statements. [2025-03-03 09:35:03,720 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 09:35:03,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:03,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 98 conjuncts are in the unsatisfiable core [2025-03-03 09:35:03,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:03,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:35:03,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:03,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:03,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:03,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:03,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:03,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:03,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:03,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:03,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:03,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-03 09:35:04,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-03 09:35:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:35:04,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 09:35:05,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649517389] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:05,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:05,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26] total 74 [2025-03-03 09:35:05,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902471151] [2025-03-03 09:35:05,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:05,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2025-03-03 09:35:05,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:05,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2025-03-03 09:35:05,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=5083, Unknown=0, NotChecked=0, Total=5402 [2025-03-03 09:35:05,440 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 74 states, 74 states have (on average 2.7027027027027026) internal successors, (200), 74 states have internal predecessors, (200), 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 09:35:07,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:07,195 INFO L93 Difference]: Finished difference Result 171 states and 188 transitions. [2025-03-03 09:35:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-03 09:35:07,198 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.7027027027027026) internal successors, (200), 74 states have internal predecessors, (200), 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) Word has length 77 [2025-03-03 09:35:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:07,199 INFO L225 Difference]: With dead ends: 171 [2025-03-03 09:35:07,199 INFO L226 Difference]: Without dead ends: 169 [2025-03-03 09:35:07,200 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 97 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2681 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=550, Invalid=8956, Unknown=0, NotChecked=0, Total=9506 [2025-03-03 09:35:07,200 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 124 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 4339 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 4379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:07,201 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 906 Invalid, 4379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4339 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-03 09:35:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-03-03 09:35:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 81. [2025-03-03 09:35:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1625) internal successors, (93), 80 states have internal predecessors, (93), 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 09:35:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2025-03-03 09:35:07,217 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 77 [2025-03-03 09:35:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:07,218 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2025-03-03 09:35:07,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.7027027027027026) internal successors, (200), 74 states have internal predecessors, (200), 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 09:35:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2025-03-03 09:35:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-03-03 09:35:07,218 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:07,218 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:07,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-03 09:35:07,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 09:35:07,419 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:07,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1836614992, now seen corresponding path program 3 times [2025-03-03 09:35:07,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:07,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463466061] [2025-03-03 09:35:07,419 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:35:07,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:07,428 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 77 statements into 11 equivalence classes. [2025-03-03 09:35:07,479 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 74 of 77 statements. [2025-03-03 09:35:07,479 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 09:35:07,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 36 proven. 136 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-03-03 09:35:07,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:07,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463466061] [2025-03-03 09:35:07,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463466061] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:07,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74968552] [2025-03-03 09:35:07,729 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:35:07,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:07,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:07,731 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:07,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 09:35:07,825 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 77 statements into 11 equivalence classes. [2025-03-03 09:35:07,924 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 74 of 77 statements. [2025-03-03 09:35:07,924 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 09:35:07,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:07,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 09:35:07,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 45 proven. 127 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-03-03 09:35:08,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 45 proven. 127 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-03-03 09:35:08,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74968552] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:08,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:08,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2025-03-03 09:35:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995975618] [2025-03-03 09:35:08,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:08,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-03 09:35:08,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:08,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-03 09:35:08,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 09:35:08,212 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 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 09:35:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:08,453 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2025-03-03 09:35:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 09:35:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 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) Word has length 77 [2025-03-03 09:35:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:08,454 INFO L225 Difference]: With dead ends: 120 [2025-03-03 09:35:08,454 INFO L226 Difference]: Without dead ends: 86 [2025-03-03 09:35:08,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 122 SyntacticMatches, 20 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=492, Invalid=1578, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 09:35:08,455 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 197 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:08,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 113 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:35:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-03-03 09:35:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2025-03-03 09:35:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1625) internal successors, (93), 80 states have internal predecessors, (93), 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 09:35:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2025-03-03 09:35:08,471 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 77 [2025-03-03 09:35:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:08,471 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2025-03-03 09:35:08,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 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 09:35:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2025-03-03 09:35:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-03-03 09:35:08,472 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:08,472 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:08,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-03 09:35:08,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-03 09:35:08,673 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:08,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1234201783, now seen corresponding path program 18 times [2025-03-03 09:35:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:08,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146488210] [2025-03-03 09:35:08,673 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:35:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:08,682 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 80 statements into 11 equivalence classes. [2025-03-03 09:35:08,714 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 80 of 80 statements. [2025-03-03 09:35:08,714 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 09:35:08,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 127 proven. 173 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 09:35:08,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:08,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146488210] [2025-03-03 09:35:08,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146488210] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:08,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431902155] [2025-03-03 09:35:08,976 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:35:08,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:08,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:08,978 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:08,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-03 09:35:09,079 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 80 statements into 11 equivalence classes. [2025-03-03 09:35:09,154 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 80 of 80 statements. [2025-03-03 09:35:09,154 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 09:35:09,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:09,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 09:35:09,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 09:35:09,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-03 09:35:09,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431902155] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:09,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:09,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2025-03-03 09:35:09,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174265440] [2025-03-03 09:35:09,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:09,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-03 09:35:09,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:09,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-03 09:35:09,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 09:35:09,510 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 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 09:35:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:09,760 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2025-03-03 09:35:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 09:35:09,761 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 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) Word has length 80 [2025-03-03 09:35:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:09,761 INFO L225 Difference]: With dead ends: 192 [2025-03-03 09:35:09,761 INFO L226 Difference]: Without dead ends: 93 [2025-03-03 09:35:09,762 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 127 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2025-03-03 09:35:09,762 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 250 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:09,762 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 106 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:35:09,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-03 09:35:09,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2025-03-03 09:35:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 84 states have internal predecessors, (98), 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 09:35:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2025-03-03 09:35:09,779 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 80 [2025-03-03 09:35:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:09,779 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2025-03-03 09:35:09,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 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 09:35:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2025-03-03 09:35:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-03 09:35:09,779 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:09,779 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:09,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-03 09:35:09,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:09,980 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:09,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:09,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1999632618, now seen corresponding path program 19 times [2025-03-03 09:35:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:09,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438639309] [2025-03-03 09:35:09,980 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:35:09,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:09,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-03-03 09:35:10,014 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 09:35:10,014 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:35:10,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:35:11,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:11,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438639309] [2025-03-03 09:35:11,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438639309] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:11,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824257709] [2025-03-03 09:35:11,296 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:35:11,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:11,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:11,298 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:11,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-03 09:35:11,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-03-03 09:35:11,428 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 09:35:11,428 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:35:11,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:11,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 101 conjuncts are in the unsatisfiable core [2025-03-03 09:35:11,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:11,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:35:11,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:11,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:11,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:11,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:11,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:11,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:11,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:11,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:11,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:11,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:11,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-03 09:35:12,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-03 09:35:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:35:12,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-03 09:35:13,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824257709] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:13,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:13,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 28, 27] total 90 [2025-03-03 09:35:13,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208919692] [2025-03-03 09:35:13,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:13,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2025-03-03 09:35:13,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:13,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2025-03-03 09:35:13,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=7559, Unknown=0, NotChecked=0, Total=8010 [2025-03-03 09:35:13,729 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 90 states, 90 states have (on average 2.566666666666667) internal successors, (231), 90 states have internal predecessors, (231), 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 09:35:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:16,426 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2025-03-03 09:35:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2025-03-03 09:35:16,426 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.566666666666667) internal successors, (231), 90 states have internal predecessors, (231), 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) Word has length 84 [2025-03-03 09:35:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:16,427 INFO L225 Difference]: With dead ends: 146 [2025-03-03 09:35:16,427 INFO L226 Difference]: Without dead ends: 144 [2025-03-03 09:35:16,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 114 SyntacticMatches, 14 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5258 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1469, Invalid=18271, Unknown=0, NotChecked=0, Total=19740 [2025-03-03 09:35:16,428 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 415 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 4187 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 4292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 4187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:16,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 592 Invalid, 4292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 4187 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-03 09:35:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-03 09:35:16,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 88. [2025-03-03 09:35:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.160919540229885) internal successors, (101), 87 states have internal predecessors, (101), 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 09:35:16,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2025-03-03 09:35:16,447 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 84 [2025-03-03 09:35:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:16,447 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2025-03-03 09:35:16,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.566666666666667) internal successors, (231), 90 states have internal predecessors, (231), 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 09:35:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2025-03-03 09:35:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-03-03 09:35:16,447 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:16,447 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:16,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-03 09:35:16,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:16,648 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:16,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:16,648 INFO L85 PathProgramCache]: Analyzing trace with hash 141944500, now seen corresponding path program 20 times [2025-03-03 09:35:16,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:16,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735402846] [2025-03-03 09:35:16,648 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:35:16,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:16,658 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 87 statements into 2 equivalence classes. [2025-03-03 09:35:16,665 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 87 of 87 statements. [2025-03-03 09:35:16,666 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:35:16,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2025-03-03 09:35:16,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735402846] [2025-03-03 09:35:16,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735402846] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815727712] [2025-03-03 09:35:16,975 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:35:16,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:16,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:16,977 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:16,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-03 09:35:17,097 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 87 statements into 2 equivalence classes. [2025-03-03 09:35:17,132 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 87 of 87 statements. [2025-03-03 09:35:17,132 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:35:17,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:17,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 09:35:17,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2025-03-03 09:35:17,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2025-03-03 09:35:17,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815727712] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:17,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:17,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2025-03-03 09:35:17,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004644339] [2025-03-03 09:35:17,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:17,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-03 09:35:17,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:17,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-03 09:35:17,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 09:35:17,645 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 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 09:35:17,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:17,923 INFO L93 Difference]: Finished difference Result 208 states and 239 transitions. [2025-03-03 09:35:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 09:35:17,923 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 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) Word has length 87 [2025-03-03 09:35:17,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:17,924 INFO L225 Difference]: With dead ends: 208 [2025-03-03 09:35:17,924 INFO L226 Difference]: Without dead ends: 100 [2025-03-03 09:35:17,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 137 SyntacticMatches, 23 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=648, Invalid=2004, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 09:35:17,925 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 412 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:17,925 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 122 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:35:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-03 09:35:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2025-03-03 09:35:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.164835164835165) internal successors, (106), 91 states have internal predecessors, (106), 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 09:35:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2025-03-03 09:35:17,943 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 87 [2025-03-03 09:35:17,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:17,943 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2025-03-03 09:35:17,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 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 09:35:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2025-03-03 09:35:17,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-03 09:35:17,944 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:17,944 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:17,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-03 09:35:18,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-03 09:35:18,146 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:18,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:18,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1164761171, now seen corresponding path program 21 times [2025-03-03 09:35:18,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:18,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004742045] [2025-03-03 09:35:18,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:35:18,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:18,158 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 13 equivalence classes. [2025-03-03 09:35:18,210 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 88 of 91 statements. [2025-03-03 09:35:18,210 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-03 09:35:18,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 135 proven. 175 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2025-03-03 09:35:18,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:18,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004742045] [2025-03-03 09:35:18,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004742045] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:18,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752880187] [2025-03-03 09:35:18,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:35:18,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:18,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:18,961 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:18,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-03 09:35:19,066 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 13 equivalence classes. [2025-03-03 09:35:19,299 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 88 of 91 statements. [2025-03-03 09:35:19,299 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-03 09:35:19,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:19,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-03-03 09:35:19,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:19,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2025-03-03 09:35:20,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 34 proven. 265 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2025-03-03 09:35:20,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:20,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2025-03-03 09:35:20,612 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-03 09:35:20,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 25 [2025-03-03 09:35:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2025-03-03 09:35:20,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752880187] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:20,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:20,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 80 [2025-03-03 09:35:20,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854224613] [2025-03-03 09:35:20,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:20,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2025-03-03 09:35:20,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:20,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2025-03-03 09:35:20,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1069, Invalid=5251, Unknown=0, NotChecked=0, Total=6320 [2025-03-03 09:35:20,744 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 80 states have internal predecessors, (160), 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 09:35:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:27,233 INFO L93 Difference]: Finished difference Result 395 states and 446 transitions. [2025-03-03 09:35:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2025-03-03 09:35:27,233 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 80 states have internal predecessors, (160), 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) Word has length 91 [2025-03-03 09:35:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:27,234 INFO L225 Difference]: With dead ends: 395 [2025-03-03 09:35:27,234 INFO L226 Difference]: Without dead ends: 169 [2025-03-03 09:35:27,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 122 SyntacticMatches, 13 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39099 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=11780, Invalid=89026, Unknown=0, NotChecked=0, Total=100806 [2025-03-03 09:35:27,237 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 1121 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 2633 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 2633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:27,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 522 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 2633 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-03 09:35:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-03-03 09:35:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 104. [2025-03-03 09:35:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 103 states have internal predecessors, (120), 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 09:35:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2025-03-03 09:35:27,264 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 91 [2025-03-03 09:35:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:27,264 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2025-03-03 09:35:27,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 80 states have internal predecessors, (160), 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 09:35:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2025-03-03 09:35:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-03 09:35:27,264 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:27,264 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:27,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-03 09:35:27,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-03 09:35:27,465 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:27,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1736562476, now seen corresponding path program 22 times [2025-03-03 09:35:27,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:27,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399226804] [2025-03-03 09:35:27,465 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:35:27,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:27,476 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 95 statements into 2 equivalence classes. [2025-03-03 09:35:27,483 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 78 of 95 statements. [2025-03-03 09:35:27,483 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:35:27,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 433 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-03 09:35:28,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:28,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399226804] [2025-03-03 09:35:28,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399226804] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:28,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822587263] [2025-03-03 09:35:28,033 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:35:28,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:28,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:28,035 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:28,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-03 09:35:28,165 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 95 statements into 2 equivalence classes. [2025-03-03 09:35:28,193 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 78 of 95 statements. [2025-03-03 09:35:28,193 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:35:28,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:28,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-03 09:35:28,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:28,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2025-03-03 09:35:28,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2025-03-03 09:35:28,305 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2025-03-03 09:35:28,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 41 [2025-03-03 09:35:28,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2025-03-03 09:35:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-03-03 09:35:28,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:29,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2025-03-03 09:35:29,177 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-03 09:35:29,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2025-03-03 09:35:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-03-03 09:35:29,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822587263] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:29,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:29,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 57 [2025-03-03 09:35:29,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642462321] [2025-03-03 09:35:29,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:29,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-03 09:35:29,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:29,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-03 09:35:29,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3002, Unknown=0, NotChecked=0, Total=3192 [2025-03-03 09:35:29,202 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 57 states, 57 states have (on average 2.824561403508772) internal successors, (161), 57 states have internal predecessors, (161), 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 09:35:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:30,993 INFO L93 Difference]: Finished difference Result 198 states and 217 transitions. [2025-03-03 09:35:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-03-03 09:35:30,993 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.824561403508772) internal successors, (161), 57 states have internal predecessors, (161), 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) Word has length 95 [2025-03-03 09:35:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:30,994 INFO L225 Difference]: With dead ends: 198 [2025-03-03 09:35:30,994 INFO L226 Difference]: Without dead ends: 196 [2025-03-03 09:35:30,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 155 SyntacticMatches, 9 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=334, Invalid=6472, Unknown=0, NotChecked=0, Total=6806 [2025-03-03 09:35:30,995 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 88 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 4602 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 4645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 4602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:30,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 840 Invalid, 4645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 4602 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-03 09:35:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2025-03-03 09:35:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 104. [2025-03-03 09:35:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 103 states have internal predecessors, (120), 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 09:35:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2025-03-03 09:35:31,023 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 95 [2025-03-03 09:35:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:31,023 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2025-03-03 09:35:31,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.824561403508772) internal successors, (161), 57 states have internal predecessors, (161), 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 09:35:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2025-03-03 09:35:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-03 09:35:31,023 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:31,023 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:31,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-03 09:35:31,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-03 09:35:31,224 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:31,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1050770378, now seen corresponding path program 23 times [2025-03-03 09:35:31,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:31,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651570350] [2025-03-03 09:35:31,224 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:35:31,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:31,235 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 98 statements into 14 equivalence classes. [2025-03-03 09:35:31,275 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 09:35:31,275 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-03 09:35:31,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-03 09:35:31,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:31,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651570350] [2025-03-03 09:35:31,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651570350] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:31,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690493040] [2025-03-03 09:35:31,868 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:35:31,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:31,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:31,870 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:31,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-03 09:35:31,987 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 98 statements into 14 equivalence classes. [2025-03-03 09:35:32,334 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 09:35:32,334 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-03 09:35:32,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:32,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 114 conjuncts are in the unsatisfiable core [2025-03-03 09:35:32,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:32,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:35:32,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:32,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-03 09:35:32,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-03 09:35:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:35:32,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-03 09:35:34,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690493040] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:34,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:34,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 31] total 75 [2025-03-03 09:35:34,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504740875] [2025-03-03 09:35:34,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:34,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2025-03-03 09:35:34,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:34,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2025-03-03 09:35:34,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=5261, Unknown=0, NotChecked=0, Total=5550 [2025-03-03 09:35:34,115 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 75 states, 75 states have (on average 2.96) internal successors, (222), 75 states have internal predecessors, (222), 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 09:35:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:36,434 INFO L93 Difference]: Finished difference Result 213 states and 233 transitions. [2025-03-03 09:35:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-03-03 09:35:36,434 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.96) internal successors, (222), 75 states have internal predecessors, (222), 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) Word has length 98 [2025-03-03 09:35:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:36,435 INFO L225 Difference]: With dead ends: 213 [2025-03-03 09:35:36,435 INFO L226 Difference]: Without dead ends: 211 [2025-03-03 09:35:36,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 141 SyntacticMatches, 13 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3296 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=533, Invalid=10179, Unknown=0, NotChecked=0, Total=10712 [2025-03-03 09:35:36,436 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 150 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 5433 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 5476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 5433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:36,436 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1225 Invalid, 5476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 5433 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-03 09:35:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2025-03-03 09:35:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 102. [2025-03-03 09:35:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 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 09:35:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2025-03-03 09:35:36,464 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 98 [2025-03-03 09:35:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:36,465 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2025-03-03 09:35:36,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.96) internal successors, (222), 75 states have internal predecessors, (222), 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 09:35:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2025-03-03 09:35:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-03 09:35:36,465 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:36,465 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:36,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-03 09:35:36,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-03 09:35:36,666 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:36,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:36,666 INFO L85 PathProgramCache]: Analyzing trace with hash 3524121, now seen corresponding path program 4 times [2025-03-03 09:35:36,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:36,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567511382] [2025-03-03 09:35:36,666 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:35:36,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:36,677 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 98 statements into 2 equivalence classes. [2025-03-03 09:35:36,680 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 81 of 98 statements. [2025-03-03 09:35:36,680 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:35:36,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 260 proven. 210 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2025-03-03 09:35:36,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:36,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567511382] [2025-03-03 09:35:36,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567511382] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:36,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901068930] [2025-03-03 09:35:36,944 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:35:36,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:36,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:36,946 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:36,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-03 09:35:37,071 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 98 statements into 2 equivalence classes. [2025-03-03 09:35:37,090 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 81 of 98 statements. [2025-03-03 09:35:37,090 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:35:37,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:37,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-03 09:35:37,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 259 proven. 210 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-03 09:35:37,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 259 proven. 210 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-03 09:35:37,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901068930] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:37,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:37,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 42 [2025-03-03 09:35:37,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938328576] [2025-03-03 09:35:37,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:37,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-03 09:35:37,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:37,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-03 09:35:37,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 09:35:37,567 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 42 states have internal predecessors, (128), 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 09:35:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:37,823 INFO L93 Difference]: Finished difference Result 150 states and 167 transitions. [2025-03-03 09:35:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-03 09:35:37,824 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 42 states have internal predecessors, (128), 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) Word has length 98 [2025-03-03 09:35:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:37,824 INFO L225 Difference]: With dead ends: 150 [2025-03-03 09:35:37,824 INFO L226 Difference]: Without dead ends: 107 [2025-03-03 09:35:37,824 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 25 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=2252, Unknown=0, NotChecked=0, Total=2970 [2025-03-03 09:35:37,825 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 184 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:37,825 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 143 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:35:37,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-03-03 09:35:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2025-03-03 09:35:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 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 09:35:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2025-03-03 09:35:37,853 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 98 [2025-03-03 09:35:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:37,853 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2025-03-03 09:35:37,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0476190476190474) internal successors, (128), 42 states have internal predecessors, (128), 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 09:35:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2025-03-03 09:35:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2025-03-03 09:35:37,853 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:37,853 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:37,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-03 09:35:38,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:38,054 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:38,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1777805932, now seen corresponding path program 24 times [2025-03-03 09:35:38,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:38,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867403344] [2025-03-03 09:35:38,054 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:35:38,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:38,065 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 101 statements into 14 equivalence classes. [2025-03-03 09:35:38,107 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) and asserted 101 of 101 statements. [2025-03-03 09:35:38,107 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2025-03-03 09:35:38,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2025-03-03 09:35:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867403344] [2025-03-03 09:35:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867403344] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136390351] [2025-03-03 09:35:38,477 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:35:38,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:38,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:38,479 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:38,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-03 09:35:38,607 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 101 statements into 14 equivalence classes. [2025-03-03 09:35:38,801 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) and asserted 101 of 101 statements. [2025-03-03 09:35:38,801 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2025-03-03 09:35:38,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:38,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 09:35:38,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2025-03-03 09:35:39,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2025-03-03 09:35:39,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136390351] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:39,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:39,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2025-03-03 09:35:39,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987901125] [2025-03-03 09:35:39,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:39,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-03 09:35:39,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:39,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-03 09:35:39,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2025-03-03 09:35:39,377 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 47 states, 47 states have (on average 2.382978723404255) internal successors, (112), 47 states have internal predecessors, (112), 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 09:35:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:39,697 INFO L93 Difference]: Finished difference Result 240 states and 275 transitions. [2025-03-03 09:35:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-03 09:35:39,697 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.382978723404255) internal successors, (112), 47 states have internal predecessors, (112), 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) Word has length 101 [2025-03-03 09:35:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:39,698 INFO L225 Difference]: With dead ends: 240 [2025-03-03 09:35:39,698 INFO L226 Difference]: Without dead ends: 114 [2025-03-03 09:35:39,699 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 159 SyntacticMatches, 27 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=853, Invalid=2687, Unknown=0, NotChecked=0, Total=3540 [2025-03-03 09:35:39,699 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 448 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:39,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 132 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:35:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-03-03 09:35:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2025-03-03 09:35:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.161904761904762) internal successors, (122), 105 states have internal predecessors, (122), 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 09:35:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2025-03-03 09:35:39,729 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 101 [2025-03-03 09:35:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:39,729 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2025-03-03 09:35:39,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.382978723404255) internal successors, (112), 47 states have internal predecessors, (112), 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 09:35:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2025-03-03 09:35:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-03 09:35:39,729 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:39,730 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:39,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2025-03-03 09:35:39,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:39,930 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:39,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:39,930 INFO L85 PathProgramCache]: Analyzing trace with hash 218497203, now seen corresponding path program 25 times [2025-03-03 09:35:39,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:39,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243466050] [2025-03-03 09:35:39,930 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:35:39,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:39,941 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 105 statements into 1 equivalence classes. [2025-03-03 09:35:39,971 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 105 of 105 statements. [2025-03-03 09:35:39,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:35:39,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:35:41,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:41,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243466050] [2025-03-03 09:35:41,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243466050] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:41,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362088545] [2025-03-03 09:35:41,133 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:35:41,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:41,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:41,135 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:41,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-03 09:35:41,269 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 105 statements into 1 equivalence classes. [2025-03-03 09:35:41,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 105 of 105 statements. [2025-03-03 09:35:41,307 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:35:41,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:41,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 125 conjuncts are in the unsatisfiable core [2025-03-03 09:35:41,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:41,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-03 09:35:41,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-03 09:35:41,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-03 09:35:42,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-03 09:35:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:35:42,514 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 547 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-03 09:35:44,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362088545] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:44,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:44,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 34, 33] total 111 [2025-03-03 09:35:44,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372415170] [2025-03-03 09:35:44,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:44,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2025-03-03 09:35:44,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:44,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2025-03-03 09:35:44,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=11641, Unknown=0, NotChecked=0, Total=12210 [2025-03-03 09:35:44,601 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 111 states, 111 states have (on average 2.6216216216216215) internal successors, (291), 111 states have internal predecessors, (291), 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 09:35:48,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:48,655 INFO L93 Difference]: Finished difference Result 179 states and 199 transitions. [2025-03-03 09:35:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2025-03-03 09:35:48,655 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.6216216216216215) internal successors, (291), 111 states have internal predecessors, (291), 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) Word has length 105 [2025-03-03 09:35:48,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:48,656 INFO L225 Difference]: With dead ends: 179 [2025-03-03 09:35:48,656 INFO L226 Difference]: Without dead ends: 177 [2025-03-03 09:35:48,657 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 135 SyntacticMatches, 13 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8233 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1924, Invalid=28178, Unknown=0, NotChecked=0, Total=30102 [2025-03-03 09:35:48,658 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 550 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 7224 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 7366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 7224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:48,658 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1003 Invalid, 7366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 7224 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2025-03-03 09:35:48,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2025-03-03 09:35:48,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 109. [2025-03-03 09:35:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 108 states have internal predecessors, (125), 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 09:35:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2025-03-03 09:35:48,689 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 105 [2025-03-03 09:35:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:48,690 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2025-03-03 09:35:48,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.6216216216216215) internal successors, (291), 111 states have internal predecessors, (291), 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 09:35:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2025-03-03 09:35:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2025-03-03 09:35:48,690 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:48,690 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:48,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-03-03 09:35:48,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-03-03 09:35:48,891 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:48,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:48,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1919374345, now seen corresponding path program 26 times [2025-03-03 09:35:48,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:48,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008152361] [2025-03-03 09:35:48,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:35:48,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:48,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-03 09:35:48,912 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 09:35:48,913 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:35:48,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2025-03-03 09:35:49,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:35:49,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008152361] [2025-03-03 09:35:49,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008152361] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:35:49,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755468480] [2025-03-03 09:35:49,320 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:35:49,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:49,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:35:49,322 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:35:49,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-03 09:35:49,464 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-03 09:35:49,498 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 09:35:49,498 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:35:49,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:35:49,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-03 09:35:49,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:35:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2025-03-03 09:35:49,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:35:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2025-03-03 09:35:50,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755468480] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:35:50,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:35:50,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2025-03-03 09:35:50,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076086558] [2025-03-03 09:35:50,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:35:50,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-03 09:35:50,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:35:50,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-03 09:35:50,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 09:35:50,110 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 50 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 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 09:35:50,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:35:50,499 INFO L93 Difference]: Finished difference Result 256 states and 293 transitions. [2025-03-03 09:35:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-03 09:35:50,500 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 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) Word has length 108 [2025-03-03 09:35:50,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:35:50,500 INFO L225 Difference]: With dead ends: 256 [2025-03-03 09:35:50,500 INFO L226 Difference]: Without dead ends: 121 [2025-03-03 09:35:50,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 170 SyntacticMatches, 29 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=966, Invalid=3066, Unknown=0, NotChecked=0, Total=4032 [2025-03-03 09:35:50,501 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 460 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:35:50,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 169 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:35:50,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2025-03-03 09:35:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 113. [2025-03-03 09:35:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 112 states have internal predecessors, (130), 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 09:35:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2025-03-03 09:35:50,532 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 108 [2025-03-03 09:35:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:35:50,532 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2025-03-03 09:35:50,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 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 09:35:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2025-03-03 09:35:50,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2025-03-03 09:35:50,533 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:35:50,533 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:35:50,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-03 09:35:50,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:35:50,733 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:35:50,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:35:50,734 INFO L85 PathProgramCache]: Analyzing trace with hash -472811178, now seen corresponding path program 27 times [2025-03-03 09:35:50,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:35:50,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382587173] [2025-03-03 09:35:50,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:35:50,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:35:50,747 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 112 statements into 16 equivalence classes. [2025-03-03 09:35:50,834 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 109 of 112 statements. [2025-03-03 09:35:50,834 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-03 09:35:50,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat