./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_25x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/sum_25x0-2.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 0189dbb29c824fc5d22409df9775c70fa543bd61c2bf554681db703f0a461966 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 08:00:05,490 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 08:00:05,556 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 08:00:05,560 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 08:00:05,561 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 08:00:05,591 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 08:00:05,591 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 08:00:05,592 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 08:00:05,592 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 08:00:05,603 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 08:00:05,604 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 08:00:05,604 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 08:00:05,605 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 08:00:05,606 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 08:00:05,607 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 08:00:05,607 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 08:00:05,607 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 08:00:05,608 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 08:00:05,608 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 08:00:05,608 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 08:00:05,610 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 08:00:05,610 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 08:00:05,610 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 08:00:05,611 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 08:00:05,611 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 08:00:05,611 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 08:00:05,612 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 08:00:05,612 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 08:00:05,612 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 08:00:05,612 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 08:00:05,613 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 08:00:05,613 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 08:00:05,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:00:05,614 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 08:00:05,614 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 08:00:05,614 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 08:00:05,615 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 08:00:05,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 08:00:05,615 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 08:00:05,616 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 08:00:05,616 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 08:00:05,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 08:00:05,617 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0189dbb29c824fc5d22409df9775c70fa543bd61c2bf554681db703f0a461966 [2024-11-16 08:00:05,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 08:00:05,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 08:00:05,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 08:00:05,905 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 08:00:05,905 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 08:00:05,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2024-11-16 08:00:07,317 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 08:00:07,531 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 08:00:07,532 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2024-11-16 08:00:07,542 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec98e2260/90cba107d930413b89afd2fcc5f38de9/FLAG0b04c214b [2024-11-16 08:00:07,901 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec98e2260/90cba107d930413b89afd2fcc5f38de9 [2024-11-16 08:00:07,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 08:00:07,904 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 08:00:07,905 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 08:00:07,905 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 08:00:07,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 08:00:07,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:00:07" (1/1) ... [2024-11-16 08:00:07,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0c1365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:07, skipping insertion in model container [2024-11-16 08:00:07,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:00:07" (1/1) ... [2024-11-16 08:00:07,924 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 08:00:08,088 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_25x0-2.c[481,494] [2024-11-16 08:00:08,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:00:08,100 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 08:00:08,113 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_25x0-2.c[481,494] [2024-11-16 08:00:08,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:00:08,133 INFO L204 MainTranslator]: Completed translation [2024-11-16 08:00:08,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08 WrapperNode [2024-11-16 08:00:08,136 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 08:00:08,137 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 08:00:08,137 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 08:00:08,137 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 08:00:08,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,167 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2024-11-16 08:00:08,167 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 08:00:08,168 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 08:00:08,168 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 08:00:08,168 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 08:00:08,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,179 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,191 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-16 08:00:08,192 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,192 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,198 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,199 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,200 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,200 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 08:00:08,202 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 08:00:08,202 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 08:00:08,202 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 08:00:08,203 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (1/1) ... [2024-11-16 08:00:08,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:00:08,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:08,243 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) [2024-11-16 08:00:08,250 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 [2024-11-16 08:00:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 08:00:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 08:00:08,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 08:00:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-11-16 08:00:08,295 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-11-16 08:00:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 08:00:08,358 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 08:00:08,360 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 08:00:08,470 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L9: havoc #t~ret4; [2024-11-16 08:00:08,483 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-16 08:00:08,483 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 08:00:08,500 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 08:00:08,500 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 08:00:08,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:00:08 BoogieIcfgContainer [2024-11-16 08:00:08,501 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 08:00:08,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 08:00:08,504 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 08:00:08,509 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 08:00:08,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:00:07" (1/3) ... [2024-11-16 08:00:08,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1828ac10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:00:08, skipping insertion in model container [2024-11-16 08:00:08,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:00:08" (2/3) ... [2024-11-16 08:00:08,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1828ac10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:00:08, skipping insertion in model container [2024-11-16 08:00:08,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:00:08" (3/3) ... [2024-11-16 08:00:08,512 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2024-11-16 08:00:08,529 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 08:00:08,531 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 08:00:08,594 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 08:00:08,603 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;@79bf7dea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 08:00:08,603 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 08:00:08,607 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 08:00:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 08:00:08,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:08,614 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:08,614 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:08,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash -253956851, now seen corresponding path program 1 times [2024-11-16 08:00:08,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:08,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960307357] [2024-11-16 08:00:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:08,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:08,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:00:08,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:08,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960307357] [2024-11-16 08:00:08,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960307357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 08:00:08,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 08:00:08,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 08:00:08,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613074754] [2024-11-16 08:00:08,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 08:00:08,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 08:00:08,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 08:00:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 08:00:08,933 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:00:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:08,994 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-11-16 08:00:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 08:00:08,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-16 08:00:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:09,005 INFO L225 Difference]: With dead ends: 28 [2024-11-16 08:00:09,005 INFO L226 Difference]: Without dead ends: 16 [2024-11-16 08:00:09,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 08:00:09,011 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:09,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 08:00:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-16 08:00:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-16 08:00:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 08:00:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-11-16 08:00:09,039 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2024-11-16 08:00:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:09,040 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-11-16 08:00:09,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:00:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-11-16 08:00:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-16 08:00:09,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:09,042 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:09,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 08:00:09,042 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:09,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:09,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1018036117, now seen corresponding path program 1 times [2024-11-16 08:00:09,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:09,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976301923] [2024-11-16 08:00:09,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:09,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:09,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:09,257 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 08:00:09,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:09,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976301923] [2024-11-16 08:00:09,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976301923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:09,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803618574] [2024-11-16 08:00:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:09,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:09,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:09,309 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) [2024-11-16 08:00:09,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 08:00:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:09,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 08:00:09,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 08:00:09,496 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 08:00:09,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803618574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:09,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:09,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-11-16 08:00:09,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564941770] [2024-11-16 08:00:09,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:09,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 08:00:09,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:09,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 08:00:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-16 08:00:09,725 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-16 08:00:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:09,775 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2024-11-16 08:00:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 08:00:09,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 17 [2024-11-16 08:00:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:09,778 INFO L225 Difference]: With dead ends: 24 [2024-11-16 08:00:09,778 INFO L226 Difference]: Without dead ends: 19 [2024-11-16 08:00:09,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-16 08:00:09,780 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:09,783 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 08:00:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-16 08:00:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-16 08:00:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 08:00:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-11-16 08:00:09,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2024-11-16 08:00:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:09,790 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-11-16 08:00:09,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-16 08:00:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-11-16 08:00:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-16 08:00:09,791 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:09,791 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:09,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 08:00:09,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:09,993 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:09,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:09,993 INFO L85 PathProgramCache]: Analyzing trace with hash -94460851, now seen corresponding path program 2 times [2024-11-16 08:00:09,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:09,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126507562] [2024-11-16 08:00:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:09,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:10,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:10,159 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:10,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-16 08:00:10,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:10,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126507562] [2024-11-16 08:00:10,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126507562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:10,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157630582] [2024-11-16 08:00:10,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 08:00:10,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:10,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:10,224 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) [2024-11-16 08:00:10,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 08:00:10,278 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 08:00:10,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:10,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 08:00:10,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-16 08:00:10,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 08:00:10,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157630582] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:10,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:10,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2024-11-16 08:00:10,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676638619] [2024-11-16 08:00:10,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:10,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 08:00:10,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 08:00:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-16 08:00:10,669 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 12 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-16 08:00:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:10,732 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2024-11-16 08:00:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 08:00:10,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 23 [2024-11-16 08:00:10,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:10,734 INFO L225 Difference]: With dead ends: 27 [2024-11-16 08:00:10,735 INFO L226 Difference]: Without dead ends: 22 [2024-11-16 08:00:10,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-16 08:00:10,736 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:10,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 50 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 08:00:10,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-16 08:00:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-16 08:00:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-16 08:00:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-16 08:00:10,745 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 23 [2024-11-16 08:00:10,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:10,745 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-16 08:00:10,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-16 08:00:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-16 08:00:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-16 08:00:10,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:10,747 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:10,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-16 08:00:10,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-16 08:00:10,948 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:10,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash -472860373, now seen corresponding path program 3 times [2024-11-16 08:00:10,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:10,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686554435] [2024-11-16 08:00:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:10,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:11,010 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:11,056 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:11,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:11,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 08:00:11,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:11,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686554435] [2024-11-16 08:00:11,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686554435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:11,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158569694] [2024-11-16 08:00:11,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 08:00:11,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:11,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:11,139 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) [2024-11-16 08:00:11,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 08:00:11,188 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 08:00:11,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:11,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 08:00:11,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 08:00:11,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 08:00:11,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158569694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:11,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:11,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2024-11-16 08:00:11,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776423179] [2024-11-16 08:00:11,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:11,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 08:00:11,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 08:00:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-16 08:00:11,735 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-16 08:00:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:11,799 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2024-11-16 08:00:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 08:00:11,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 29 [2024-11-16 08:00:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:11,800 INFO L225 Difference]: With dead ends: 30 [2024-11-16 08:00:11,800 INFO L226 Difference]: Without dead ends: 25 [2024-11-16 08:00:11,801 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2024-11-16 08:00:11,802 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:11,802 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 08:00:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-16 08:00:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-16 08:00:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 08:00:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-11-16 08:00:11,807 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2024-11-16 08:00:11,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:11,808 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-11-16 08:00:11,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-16 08:00:11,808 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-11-16 08:00:11,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-16 08:00:11,809 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:11,809 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:11,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 08:00:12,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:12,014 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:12,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:12,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1015344013, now seen corresponding path program 4 times [2024-11-16 08:00:12,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:12,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436630254] [2024-11-16 08:00:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:12,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:12,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:12,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:12,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:12,246 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:12,274 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-16 08:00:12,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:12,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436630254] [2024-11-16 08:00:12,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436630254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:12,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701924671] [2024-11-16 08:00:12,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 08:00:12,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:12,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:12,297 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) [2024-11-16 08:00:12,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 08:00:12,354 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 08:00:12,354 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:12,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 08:00:12,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-16 08:00:12,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 08:00:13,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701924671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:13,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:13,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2024-11-16 08:00:13,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854110764] [2024-11-16 08:00:13,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:13,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 08:00:13,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:13,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 08:00:13,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-16 08:00:13,174 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-16 08:00:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:13,240 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2024-11-16 08:00:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 08:00:13,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 35 [2024-11-16 08:00:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:13,241 INFO L225 Difference]: With dead ends: 33 [2024-11-16 08:00:13,242 INFO L226 Difference]: Without dead ends: 28 [2024-11-16 08:00:13,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-11-16 08:00:13,243 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:13,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 60 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 08:00:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-16 08:00:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-16 08:00:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-16 08:00:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2024-11-16 08:00:13,248 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 35 [2024-11-16 08:00:13,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:13,249 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2024-11-16 08:00:13,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-16 08:00:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2024-11-16 08:00:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-16 08:00:13,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:13,250 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:13,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 08:00:13,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:13,451 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:13,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:13,453 INFO L85 PathProgramCache]: Analyzing trace with hash -598941205, now seen corresponding path program 5 times [2024-11-16 08:00:13,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:13,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830463287] [2024-11-16 08:00:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:13,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 08:00:13,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:13,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830463287] [2024-11-16 08:00:13,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830463287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:13,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197912722] [2024-11-16 08:00:13,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 08:00:13,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:13,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:13,754 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) [2024-11-16 08:00:13,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 08:00:13,810 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-16 08:00:13,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:13,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 08:00:13,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 08:00:13,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 08:00:14,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197912722] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:14,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:14,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2024-11-16 08:00:14,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491856269] [2024-11-16 08:00:14,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:14,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-16 08:00:14,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:14,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-16 08:00:14,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-16 08:00:14,940 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-16 08:00:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:15,022 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-11-16 08:00:15,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 08:00:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 41 [2024-11-16 08:00:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:15,023 INFO L225 Difference]: With dead ends: 36 [2024-11-16 08:00:15,023 INFO L226 Difference]: Without dead ends: 31 [2024-11-16 08:00:15,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-11-16 08:00:15,024 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:15,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 76 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 08:00:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-16 08:00:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-16 08:00:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-16 08:00:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2024-11-16 08:00:15,029 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 41 [2024-11-16 08:00:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:15,030 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2024-11-16 08:00:15,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-16 08:00:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2024-11-16 08:00:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-16 08:00:15,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:15,031 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:15,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 08:00:15,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:15,236 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:15,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash -853294387, now seen corresponding path program 6 times [2024-11-16 08:00:15,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:15,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87454178] [2024-11-16 08:00:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:15,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,534 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-16 08:00:15,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:15,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87454178] [2024-11-16 08:00:15,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87454178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:15,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575658116] [2024-11-16 08:00:15,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 08:00:15,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:15,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:15,610 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) [2024-11-16 08:00:15,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 08:00:15,687 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-16 08:00:15,687 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:15,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-16 08:00:15,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-16 08:00:15,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-16 08:00:17,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575658116] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:17,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:17,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2024-11-16 08:00:17,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518680726] [2024-11-16 08:00:17,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:17,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 08:00:17,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:17,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 08:00:17,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-11-16 08:00:17,116 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 20 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-16 08:00:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:17,206 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2024-11-16 08:00:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 08:00:17,207 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 20 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 47 [2024-11-16 08:00:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:17,208 INFO L225 Difference]: With dead ends: 39 [2024-11-16 08:00:17,208 INFO L226 Difference]: Without dead ends: 34 [2024-11-16 08:00:17,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2024-11-16 08:00:17,209 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:17,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 89 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 08:00:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-16 08:00:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-16 08:00:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-16 08:00:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-16 08:00:17,214 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 47 [2024-11-16 08:00:17,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:17,215 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-16 08:00:17,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 20 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-16 08:00:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-16 08:00:17,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-16 08:00:17,216 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:17,216 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:17,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-16 08:00:17,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:17,417 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:17,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1267565909, now seen corresponding path program 7 times [2024-11-16 08:00:17,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:17,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175324251] [2024-11-16 08:00:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:17,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,600 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,682 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-16 08:00:17,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:17,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175324251] [2024-11-16 08:00:17,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175324251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:17,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582987193] [2024-11-16 08:00:17,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 08:00:17,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:17,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:17,791 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) [2024-11-16 08:00:17,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 08:00:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:17,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-16 08:00:17,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-16 08:00:17,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-16 08:00:19,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582987193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:19,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:19,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2024-11-16 08:00:19,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560274961] [2024-11-16 08:00:19,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:19,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 08:00:19,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:19,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 08:00:19,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-11-16 08:00:19,703 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 20 states have (on average 2.2) internal successors, (44), 22 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-16 08:00:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:19,796 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-11-16 08:00:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 08:00:19,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.2) internal successors, (44), 22 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 53 [2024-11-16 08:00:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:19,798 INFO L225 Difference]: With dead ends: 42 [2024-11-16 08:00:19,798 INFO L226 Difference]: Without dead ends: 37 [2024-11-16 08:00:19,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 103 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2024-11-16 08:00:19,799 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:19,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:00:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-16 08:00:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-16 08:00:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-16 08:00:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2024-11-16 08:00:19,805 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 53 [2024-11-16 08:00:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:19,806 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2024-11-16 08:00:19,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.2) internal successors, (44), 22 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-16 08:00:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2024-11-16 08:00:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-16 08:00:19,807 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:19,807 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:19,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 08:00:20,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:20,009 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:20,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:20,009 INFO L85 PathProgramCache]: Analyzing trace with hash -753980915, now seen corresponding path program 8 times [2024-11-16 08:00:20,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:20,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102649982] [2024-11-16 08:00:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:20,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,249 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,438 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-16 08:00:20,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:20,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102649982] [2024-11-16 08:00:20,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102649982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:20,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718860250] [2024-11-16 08:00:20,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 08:00:20,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:20,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:20,480 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) [2024-11-16 08:00:20,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 08:00:20,607 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 08:00:20,607 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:20,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-16 08:00:20,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-16 08:00:20,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-16 08:00:23,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718860250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:23,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:23,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2024-11-16 08:00:23,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753165339] [2024-11-16 08:00:23,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:23,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-16 08:00:23,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-16 08:00:23,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-11-16 08:00:23,205 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 24 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2024-11-16 08:00:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:23,324 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2024-11-16 08:00:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 08:00:23,324 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 24 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 59 [2024-11-16 08:00:23,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:23,325 INFO L225 Difference]: With dead ends: 45 [2024-11-16 08:00:23,325 INFO L226 Difference]: Without dead ends: 40 [2024-11-16 08:00:23,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2024-11-16 08:00:23,326 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 68 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:23,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 98 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:00:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-16 08:00:23,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-16 08:00:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-16 08:00:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2024-11-16 08:00:23,332 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 59 [2024-11-16 08:00:23,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:23,332 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2024-11-16 08:00:23,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 24 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2024-11-16 08:00:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2024-11-16 08:00:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-16 08:00:23,334 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:23,334 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:23,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 08:00:23,537 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,SelfDestructingSolverStorable8 [2024-11-16 08:00:23,538 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:23,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1024621717, now seen corresponding path program 9 times [2024-11-16 08:00:23,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:23,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519874163] [2024-11-16 08:00:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:23,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:23,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:23,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:23,834 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:23,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:23,945 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:23,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:24,021 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:24,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:24,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:24,114 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-16 08:00:24,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:24,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519874163] [2024-11-16 08:00:24,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519874163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:24,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311048918] [2024-11-16 08:00:24,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 08:00:24,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:24,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:24,136 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) [2024-11-16 08:00:24,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 08:00:24,302 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-16 08:00:24,303 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:24,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-16 08:00:24,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-16 08:00:24,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 08:00:27,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311048918] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:27,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:27,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2024-11-16 08:00:27,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152230384] [2024-11-16 08:00:27,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:27,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-16 08:00:27,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-16 08:00:27,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-11-16 08:00:27,710 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 26 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2024-11-16 08:00:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:27,824 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-11-16 08:00:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 08:00:27,824 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 26 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 65 [2024-11-16 08:00:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:27,825 INFO L225 Difference]: With dead ends: 48 [2024-11-16 08:00:27,825 INFO L226 Difference]: Without dead ends: 43 [2024-11-16 08:00:27,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 08:00:27,826 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:27,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 113 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:00:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-16 08:00:27,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-16 08:00:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-16 08:00:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2024-11-16 08:00:27,832 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 65 [2024-11-16 08:00:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:27,832 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2024-11-16 08:00:27,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 26 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2024-11-16 08:00:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2024-11-16 08:00:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-16 08:00:27,834 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:27,834 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:27,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-16 08:00:28,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-16 08:00:28,039 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:28,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash -971300531, now seen corresponding path program 10 times [2024-11-16 08:00:28,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:28,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512467046] [2024-11-16 08:00:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:28,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,533 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-16 08:00:28,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:28,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512467046] [2024-11-16 08:00:28,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512467046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:28,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624990431] [2024-11-16 08:00:28,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 08:00:28,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:28,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:28,709 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) [2024-11-16 08:00:28,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 08:00:28,912 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 08:00:28,913 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:28,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-16 08:00:28,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-16 08:00:28,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-16 08:00:33,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624990431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:33,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:33,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2024-11-16 08:00:33,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654064479] [2024-11-16 08:00:33,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:33,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 08:00:33,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 08:00:33,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-11-16 08:00:33,441 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 28 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-16 08:00:33,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:33,587 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2024-11-16 08:00:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 08:00:33,588 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 28 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 71 [2024-11-16 08:00:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:33,589 INFO L225 Difference]: With dead ends: 51 [2024-11-16 08:00:33,589 INFO L226 Difference]: Without dead ends: 46 [2024-11-16 08:00:33,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=958, Unknown=0, NotChecked=0, Total=1406 [2024-11-16 08:00:33,590 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:33,590 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 111 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:00:33,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-16 08:00:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-16 08:00:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-16 08:00:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2024-11-16 08:00:33,595 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 71 [2024-11-16 08:00:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:33,596 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2024-11-16 08:00:33,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 28 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-16 08:00:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2024-11-16 08:00:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-16 08:00:33,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:33,597 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:33,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 08:00:33,798 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,SelfDestructingSolverStorable10 [2024-11-16 08:00:33,798 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:33,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:33,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1835662379, now seen corresponding path program 11 times [2024-11-16 08:00:33,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:33,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733792406] [2024-11-16 08:00:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:33,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:33,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,156 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,428 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-16 08:00:34,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:34,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733792406] [2024-11-16 08:00:34,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733792406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:34,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210413793] [2024-11-16 08:00:34,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 08:00:34,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:34,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:34,503 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) [2024-11-16 08:00:34,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 08:00:34,790 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-16 08:00:34,790 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:34,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-16 08:00:34,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-16 08:00:34,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-16 08:00:40,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210413793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:40,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:40,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2024-11-16 08:00:40,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204789805] [2024-11-16 08:00:40,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:40,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-16 08:00:40,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-16 08:00:40,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2024-11-16 08:00:40,570 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 30 states, 28 states have (on average 2.142857142857143) internal successors, (60), 30 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2024-11-16 08:00:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:40,713 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2024-11-16 08:00:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 08:00:40,714 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.142857142857143) internal successors, (60), 30 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 77 [2024-11-16 08:00:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:40,715 INFO L225 Difference]: With dead ends: 54 [2024-11-16 08:00:40,716 INFO L226 Difference]: Without dead ends: 49 [2024-11-16 08:00:40,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2024-11-16 08:00:40,718 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:40,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 120 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:00:40,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-16 08:00:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-16 08:00:40,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-16 08:00:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2024-11-16 08:00:40,728 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 77 [2024-11-16 08:00:40,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:40,728 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2024-11-16 08:00:40,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.142857142857143) internal successors, (60), 30 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2024-11-16 08:00:40,729 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2024-11-16 08:00:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-16 08:00:40,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:40,730 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:40,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-16 08:00:40,930 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,SelfDestructingSolverStorable11 [2024-11-16 08:00:40,930 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:40,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1357141875, now seen corresponding path program 12 times [2024-11-16 08:00:40,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:40,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310356850] [2024-11-16 08:00:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:40,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,037 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,165 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,569 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-16 08:00:41,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:41,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310356850] [2024-11-16 08:00:41,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310356850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:41,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537194172] [2024-11-16 08:00:41,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 08:00:41,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:41,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:41,738 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) [2024-11-16 08:00:41,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 08:00:42,117 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-16 08:00:42,118 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:42,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-16 08:00:42,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-16 08:00:42,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-16 08:00:49,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537194172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:49,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:49,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2024-11-16 08:00:49,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849602153] [2024-11-16 08:00:49,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:49,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-16 08:00:49,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:49,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-16 08:00:49,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-11-16 08:00:49,503 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 32 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 32 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2024-11-16 08:00:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:49,668 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2024-11-16 08:00:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 08:00:49,669 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 32 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 83 [2024-11-16 08:00:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:49,670 INFO L225 Difference]: With dead ends: 57 [2024-11-16 08:00:49,670 INFO L226 Difference]: Without dead ends: 52 [2024-11-16 08:00:49,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=606, Invalid=1286, Unknown=0, NotChecked=0, Total=1892 [2024-11-16 08:00:49,671 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:49,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 125 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:00:49,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-16 08:00:49,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-16 08:00:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-16 08:00:49,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2024-11-16 08:00:49,677 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 83 [2024-11-16 08:00:49,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:49,678 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2024-11-16 08:00:49,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 32 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2024-11-16 08:00:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2024-11-16 08:00:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-16 08:00:49,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:49,679 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:49,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-16 08:00:49,879 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,SelfDestructingSolverStorable12 [2024-11-16 08:00:49,880 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:49,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash -392960789, now seen corresponding path program 13 times [2024-11-16 08:00:49,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:49,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60254144] [2024-11-16 08:00:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:49,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,162 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,838 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-16 08:00:50,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60254144] [2024-11-16 08:00:50,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60254144] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341138846] [2024-11-16 08:00:50,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 08:00:50,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:50,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:50,864 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) [2024-11-16 08:00:50,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 08:00:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:51,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-16 08:00:51,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-16 08:00:51,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-16 08:01:00,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341138846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:01:00,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:01:00,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2024-11-16 08:01:00,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008357023] [2024-11-16 08:01:00,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:00,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-16 08:01:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-16 08:01:00,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2024-11-16 08:01:00,775 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 34 states, 32 states have (on average 2.125) internal successors, (68), 34 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2024-11-16 08:01:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:00,929 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2024-11-16 08:01:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 08:01:00,929 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.125) internal successors, (68), 34 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 89 [2024-11-16 08:01:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:00,930 INFO L225 Difference]: With dead ends: 60 [2024-11-16 08:01:00,930 INFO L226 Difference]: Without dead ends: 55 [2024-11-16 08:01:00,931 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 175 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=694, Invalid=1468, Unknown=0, NotChecked=0, Total=2162 [2024-11-16 08:01:00,931 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:00,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 124 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-16 08:01:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-16 08:01:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-16 08:01:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2024-11-16 08:01:00,936 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 89 [2024-11-16 08:01:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:00,937 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2024-11-16 08:01:00,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.125) internal successors, (68), 34 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2024-11-16 08:01:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2024-11-16 08:01:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-16 08:01:00,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:00,938 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:00,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-16 08:01:01,139 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,SelfDestructingSolverStorable13 [2024-11-16 08:01:01,139 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:01,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1743044557, now seen corresponding path program 14 times [2024-11-16 08:01:01,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:01,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604120944] [2024-11-16 08:01:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:01,262 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:01,378 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:01,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:01,581 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:01,663 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:01,731 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:01,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:01,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:01,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:01,981 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:02,032 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:02,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:02,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:02,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:02,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-16 08:01:02,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:02,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604120944] [2024-11-16 08:01:02,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604120944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:02,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758385981] [2024-11-16 08:01:02,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 08:01:02,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:02,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:02,200 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) [2024-11-16 08:01:02,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 08:01:02,833 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 08:01:02,833 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:01:02,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-16 08:01:02,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-16 08:01:02,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-16 08:01:14,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758385981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:01:14,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:01:14,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 36 [2024-11-16 08:01:14,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911100339] [2024-11-16 08:01:14,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:14,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-16 08:01:14,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-16 08:01:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2024-11-16 08:01:14,286 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 36 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 36 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2024-11-16 08:01:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:14,473 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-11-16 08:01:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 08:01:14,473 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 36 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 95 [2024-11-16 08:01:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:14,474 INFO L225 Difference]: With dead ends: 63 [2024-11-16 08:01:14,474 INFO L226 Difference]: Without dead ends: 58 [2024-11-16 08:01:14,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2024-11-16 08:01:14,476 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:14,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 130 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:14,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-16 08:01:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-16 08:01:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-16 08:01:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2024-11-16 08:01:14,487 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 95 [2024-11-16 08:01:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:14,488 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2024-11-16 08:01:14,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 36 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2024-11-16 08:01:14,488 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2024-11-16 08:01:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-16 08:01:14,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:14,489 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:14,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-16 08:01:14,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:14,689 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:14,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:14,690 INFO L85 PathProgramCache]: Analyzing trace with hash -132694613, now seen corresponding path program 15 times [2024-11-16 08:01:14,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:14,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324729109] [2024-11-16 08:01:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:14,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:14,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:14,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,066 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,162 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,242 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,460 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,634 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-16 08:01:15,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:15,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324729109] [2024-11-16 08:01:15,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324729109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:15,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725212722] [2024-11-16 08:01:15,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 08:01:15,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:15,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:15,767 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) [2024-11-16 08:01:15,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-16 08:01:16,439 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-16 08:01:16,439 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:01:16,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-16 08:01:16,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-16 08:01:16,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-16 08:01:30,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725212722] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:01:30,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:01:30,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 38 [2024-11-16 08:01:30,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824478838] [2024-11-16 08:01:30,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:30,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-16 08:01:30,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:30,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-16 08:01:30,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2024-11-16 08:01:30,653 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 38 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2024-11-16 08:01:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:30,822 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2024-11-16 08:01:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 08:01:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 38 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 101 [2024-11-16 08:01:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:30,823 INFO L225 Difference]: With dead ends: 66 [2024-11-16 08:01:30,823 INFO L226 Difference]: Without dead ends: 61 [2024-11-16 08:01:30,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=888, Invalid=1868, Unknown=0, NotChecked=0, Total=2756 [2024-11-16 08:01:30,824 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:30,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 150 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-16 08:01:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-16 08:01:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-16 08:01:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2024-11-16 08:01:30,832 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 101 [2024-11-16 08:01:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:30,832 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2024-11-16 08:01:30,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 38 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2024-11-16 08:01:30,833 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2024-11-16 08:01:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-16 08:01:30,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:30,835 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:30,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-16 08:01:31,035 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,SelfDestructingSolverStorable15 [2024-11-16 08:01:31,035 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:31,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:31,036 INFO L85 PathProgramCache]: Analyzing trace with hash -615880947, now seen corresponding path program 16 times [2024-11-16 08:01:31,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:31,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607797728] [2024-11-16 08:01:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:31,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,843 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:32,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:32,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:32,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:32,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:32,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:32,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-16 08:01:32,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:32,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607797728] [2024-11-16 08:01:32,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607797728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:32,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059092201] [2024-11-16 08:01:32,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 08:01:32,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:32,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:32,231 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) [2024-11-16 08:01:32,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process