./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_15x0-2.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_15x0-2.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 610248c6c4c4e7168ba971ed5fa38cec025658aa482465da336c99be91c3aa5c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 07:59:44,531 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 07:59:44,579 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 07:59:44,585 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 07:59:44,587 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 07:59:44,610 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 07:59:44,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 07:59:44,611 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 07:59:44,611 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 07:59:44,612 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 07:59:44,613 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 07:59:44,613 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 07:59:44,613 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 07:59:44,613 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 07:59:44,615 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 07:59:44,615 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 07:59:44,615 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 07:59:44,615 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 07:59:44,616 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 07:59:44,616 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 07:59:44,618 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 07:59:44,619 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 07:59:44,619 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 07:59:44,619 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 07:59:44,619 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 07:59:44,619 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 07:59:44,620 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 07:59:44,620 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 07:59:44,620 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 07:59:44,620 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 07:59:44,620 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 07:59:44,620 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 07:59:44,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:59:44,621 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 07:59:44,621 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 07:59:44,621 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 07:59:44,621 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 07:59:44,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 07:59:44,621 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 07:59:44,621 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 07:59:44,621 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 07:59:44,622 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 07:59:44,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610248c6c4c4e7168ba971ed5fa38cec025658aa482465da336c99be91c3aa5c [2024-11-16 07:59:44,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 07:59:44,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 07:59:44,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 07:59:44,821 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 07:59:44,821 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 07:59:44,822 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2024-11-16 07:59:46,018 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 07:59:46,169 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 07:59:46,170 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2024-11-16 07:59:46,178 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14b0f9542/2337423a7d754b71a69108f3b1f0c432/FLAG796df3054 [2024-11-16 07:59:46,585 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14b0f9542/2337423a7d754b71a69108f3b1f0c432 [2024-11-16 07:59:46,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 07:59:46,587 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 07:59:46,588 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 07:59:46,588 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 07:59:46,592 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 07:59:46,592 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,593 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35554431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46, skipping insertion in model container [2024-11-16 07:59:46,593 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,605 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 07:59:46,734 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_15x0-2.c[481,494] [2024-11-16 07:59:46,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:59:46,746 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 07:59:46,759 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_15x0-2.c[481,494] [2024-11-16 07:59:46,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 07:59:46,771 INFO L204 MainTranslator]: Completed translation [2024-11-16 07:59:46,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46 WrapperNode [2024-11-16 07:59:46,771 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 07:59:46,772 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 07:59:46,772 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 07:59:46,772 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 07:59:46,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,805 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2024-11-16 07:59:46,806 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 07:59:46,806 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 07:59:46,806 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 07:59:46,806 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 07:59:46,815 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,822 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,842 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 07:59:46,842 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,842 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,844 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,844 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,845 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,846 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 07:59:46,846 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 07:59:46,846 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 07:59:46,847 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 07:59:46,847 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (1/1) ... [2024-11-16 07:59:46,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 07:59:46,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:46,879 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 07:59:46,882 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 07:59:46,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 07:59:46,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 07:59:46,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 07:59:46,912 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-11-16 07:59:46,912 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-11-16 07:59:46,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 07:59:46,955 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 07:59:46,957 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 07:59:47,021 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L9: havoc #t~ret4; [2024-11-16 07:59:47,031 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-16 07:59:47,031 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 07:59:47,041 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 07:59:47,041 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 07:59:47,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:59:47 BoogieIcfgContainer [2024-11-16 07:59:47,042 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 07:59:47,044 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 07:59:47,044 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 07:59:47,046 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 07:59:47,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:59:46" (1/3) ... [2024-11-16 07:59:47,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b73de6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:59:47, skipping insertion in model container [2024-11-16 07:59:47,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:59:46" (2/3) ... [2024-11-16 07:59:47,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b73de6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:59:47, skipping insertion in model container [2024-11-16 07:59:47,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:59:47" (3/3) ... [2024-11-16 07:59:47,049 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2024-11-16 07:59:47,062 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 07:59:47,062 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 07:59:47,111 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 07:59:47,115 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;@21172dea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 07:59:47,115 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 07:59:47,118 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 07:59:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 07:59:47,123 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:47,123 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:47,124 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:47,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:47,127 INFO L85 PathProgramCache]: Analyzing trace with hash -253956851, now seen corresponding path program 1 times [2024-11-16 07:59:47,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:47,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044012485] [2024-11-16 07:59:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:47,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:47,299 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:47,372 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 07:59:47,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:47,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044012485] [2024-11-16 07:59:47,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044012485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 07:59:47,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 07:59:47,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 07:59:47,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759229904] [2024-11-16 07:59:47,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 07:59:47,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 07:59:47,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 07:59:47,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 07:59:47,395 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 07:59:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:47,449 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-11-16 07:59:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 07:59:47,451 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 07:59:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:47,457 INFO L225 Difference]: With dead ends: 28 [2024-11-16 07:59:47,457 INFO L226 Difference]: Without dead ends: 16 [2024-11-16 07:59:47,459 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 07:59:47,463 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 07:59:47,464 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 07:59:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-16 07:59:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-16 07:59:47,488 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 07:59:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-11-16 07:59:47,490 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2024-11-16 07:59:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:47,490 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-11-16 07:59:47,490 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 07:59:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-11-16 07:59:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-16 07:59:47,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:47,491 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:47,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 07:59:47,492 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:47,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1018036117, now seen corresponding path program 1 times [2024-11-16 07:59:47,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:47,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933290126] [2024-11-16 07:59:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:47,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:47,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:47,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:47,655 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 07:59:47,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:47,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933290126] [2024-11-16 07:59:47,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933290126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:47,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771691838] [2024-11-16 07:59:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:47,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:47,658 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 07:59:47,660 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 07:59:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:47,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 07:59:47,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:47,761 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 07:59:47,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:47,916 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 07:59:47,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771691838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:47,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:47,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-11-16 07:59:47,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176904849] [2024-11-16 07:59:47,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:47,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 07:59:47,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:47,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 07:59:47,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-16 07:59:47,920 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 07:59:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:47,964 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2024-11-16 07:59:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 07:59:47,965 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 07:59:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:47,965 INFO L225 Difference]: With dead ends: 24 [2024-11-16 07:59:47,966 INFO L226 Difference]: Without dead ends: 19 [2024-11-16 07:59:47,966 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 07:59:47,967 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 07:59:47,967 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 07:59:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-16 07:59:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-16 07:59:47,974 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 07:59:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-11-16 07:59:47,974 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2024-11-16 07:59:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:47,976 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-11-16 07:59:47,976 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 07:59:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-11-16 07:59:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-16 07:59:47,977 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:47,978 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:47,990 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 07:59:48,184 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 07:59:48,185 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:48,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash -94460851, now seen corresponding path program 2 times [2024-11-16 07:59:48,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:48,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198436728] [2024-11-16 07:59:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:48,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:48,250 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:48,320 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:48,352 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:48,370 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 07:59:48,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:48,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198436728] [2024-11-16 07:59:48,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198436728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:48,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969545540] [2024-11-16 07:59:48,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 07:59:48,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:48,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:48,376 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 07:59:48,377 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 07:59:48,410 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 07:59:48,411 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:59:48,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 07:59:48,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:48,452 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 07:59:48,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:48,704 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 07:59:48,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969545540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:48,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:48,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2024-11-16 07:59:48,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439917034] [2024-11-16 07:59:48,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:48,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 07:59:48,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:48,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 07:59:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-16 07:59:48,707 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 07:59:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:48,754 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2024-11-16 07:59:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 07:59:48,755 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 07:59:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:48,755 INFO L225 Difference]: With dead ends: 27 [2024-11-16 07:59:48,755 INFO L226 Difference]: Without dead ends: 22 [2024-11-16 07:59:48,756 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 07:59:48,756 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 07:59:48,757 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 07:59:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-16 07:59:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-16 07:59:48,760 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 07:59:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-16 07:59:48,760 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 23 [2024-11-16 07:59:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:48,760 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-16 07:59:48,761 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 07:59:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-16 07:59:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-16 07:59:48,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:48,761 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:48,774 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 07:59:48,963 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 07:59:48,964 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:48,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:48,964 INFO L85 PathProgramCache]: Analyzing trace with hash -472860373, now seen corresponding path program 3 times [2024-11-16 07:59:48,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:48,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153425638] [2024-11-16 07:59:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:48,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:49,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:49,077 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:49,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:49,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:49,159 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 07:59:49,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:49,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153425638] [2024-11-16 07:59:49,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153425638] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:49,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528860807] [2024-11-16 07:59:49,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 07:59:49,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:49,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:49,163 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 07:59:49,164 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 07:59:49,198 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 07:59:49,198 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:59:49,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 07:59:49,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:49,230 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 07:59:49,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:49,594 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 07:59:49,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528860807] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:49,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:49,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2024-11-16 07:59:49,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705744718] [2024-11-16 07:59:49,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:49,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 07:59:49,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:49,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 07:59:49,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-16 07:59:49,596 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 07:59:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:49,654 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2024-11-16 07:59:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 07:59:49,654 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 07:59:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:49,655 INFO L225 Difference]: With dead ends: 30 [2024-11-16 07:59:49,655 INFO L226 Difference]: Without dead ends: 25 [2024-11-16 07:59:49,656 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 07:59:49,656 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 07:59:49,657 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 07:59:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-16 07:59:49,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-16 07:59:49,660 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 07:59:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-11-16 07:59:49,661 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2024-11-16 07:59:49,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:49,661 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-11-16 07:59:49,661 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 07:59:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-11-16 07:59:49,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-16 07:59:49,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:49,662 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:49,675 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 07:59:49,863 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 07:59:49,863 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:49,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1015344013, now seen corresponding path program 4 times [2024-11-16 07:59:49,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:49,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827884809] [2024-11-16 07:59:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:49,906 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:49,947 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:49,978 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:49,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:50,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:50,029 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 07:59:50,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:50,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827884809] [2024-11-16 07:59:50,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827884809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:50,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114044685] [2024-11-16 07:59:50,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 07:59:50,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:50,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:50,031 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 07:59:50,032 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 07:59:50,077 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 07:59:50,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:59:50,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 07:59:50,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:50,121 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 07:59:50,122 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:50,703 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 07:59:50,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114044685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:50,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:50,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2024-11-16 07:59:50,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146135663] [2024-11-16 07:59:50,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:50,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 07:59:50,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:50,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 07:59:50,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-16 07:59:50,704 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 07:59:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:50,757 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2024-11-16 07:59:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 07:59:50,758 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 07:59:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:50,758 INFO L225 Difference]: With dead ends: 33 [2024-11-16 07:59:50,758 INFO L226 Difference]: Without dead ends: 28 [2024-11-16 07:59:50,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-11-16 07:59:50,759 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 07:59:50,760 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 07:59:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-16 07:59:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-16 07:59:50,764 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 07:59:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2024-11-16 07:59:50,766 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 35 [2024-11-16 07:59:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:50,766 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2024-11-16 07:59:50,766 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 07:59:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2024-11-16 07:59:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-16 07:59:50,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:50,767 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:50,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 07:59:50,971 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 07:59:50,972 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:50,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash -598941205, now seen corresponding path program 5 times [2024-11-16 07:59:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:50,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124187749] [2024-11-16 07:59:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:50,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:51,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:51,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:51,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:51,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:51,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:51,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:51,223 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 07:59:51,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:51,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124187749] [2024-11-16 07:59:51,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124187749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:51,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964336838] [2024-11-16 07:59:51,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 07:59:51,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:51,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:51,226 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 07:59:51,227 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 07:59:51,273 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-16 07:59:51,274 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:59:51,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 07:59:51,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:51,316 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 07:59:51,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:52,166 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 07:59:52,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964336838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:52,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:52,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2024-11-16 07:59:52,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337615760] [2024-11-16 07:59:52,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:52,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-16 07:59:52,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-16 07:59:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-16 07:59:52,168 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 07:59:52,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:52,258 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-11-16 07:59:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 07:59:52,259 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 07:59:52,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:52,259 INFO L225 Difference]: With dead ends: 36 [2024-11-16 07:59:52,259 INFO L226 Difference]: Without dead ends: 31 [2024-11-16 07:59:52,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-11-16 07:59:52,260 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 07:59:52,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 76 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 07:59:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-16 07:59:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-16 07:59:52,264 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 07:59:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2024-11-16 07:59:52,264 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 41 [2024-11-16 07:59:52,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:52,268 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2024-11-16 07:59:52,268 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 07:59:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2024-11-16 07:59:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-16 07:59:52,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:52,269 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:52,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 07:59:52,470 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 07:59:52,470 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:52,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:52,471 INFO L85 PathProgramCache]: Analyzing trace with hash -853294387, now seen corresponding path program 6 times [2024-11-16 07:59:52,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:52,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587284664] [2024-11-16 07:59:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:52,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:52,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:52,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:52,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:52,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:52,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:52,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:52,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:52,706 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 07:59:52,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:52,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587284664] [2024-11-16 07:59:52,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587284664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:52,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012319436] [2024-11-16 07:59:52,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 07:59:52,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:52,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:52,708 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 07:59:52,709 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 07:59:52,772 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-16 07:59:52,772 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:59:52,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-16 07:59:52,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:52,819 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 07:59:52,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:53,984 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 07:59:53,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012319436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:53,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:53,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2024-11-16 07:59:53,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746603877] [2024-11-16 07:59:53,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:53,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 07:59:53,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:53,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 07:59:53,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-11-16 07:59:53,986 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 07:59:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:54,050 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2024-11-16 07:59:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 07:59:54,051 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 07:59:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:54,053 INFO L225 Difference]: With dead ends: 39 [2024-11-16 07:59:54,053 INFO L226 Difference]: Without dead ends: 34 [2024-11-16 07:59:54,053 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 07:59:54,053 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 07:59:54,054 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 07:59:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-16 07:59:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-16 07:59:54,057 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 07:59:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-16 07:59:54,057 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 47 [2024-11-16 07:59:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:54,057 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-16 07:59:54,057 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 07:59:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-16 07:59:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-16 07:59:54,058 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:54,058 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:54,070 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 07:59:54,258 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 07:59:54,259 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:54,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:54,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1267565909, now seen corresponding path program 7 times [2024-11-16 07:59:54,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:54,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019529691] [2024-11-16 07:59:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:54,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:54,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:54,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:54,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:54,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:54,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:54,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:54,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:54,525 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:54,538 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 07:59:54,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:54,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019529691] [2024-11-16 07:59:54,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019529691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:54,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131094591] [2024-11-16 07:59:54,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 07:59:54,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:54,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:54,540 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 07:59:54,542 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 07:59:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:54,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-16 07:59:54,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:54,672 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 07:59:54,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:56,128 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 07:59:56,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131094591] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:56,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:56,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2024-11-16 07:59:56,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67597734] [2024-11-16 07:59:56,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:56,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 07:59:56,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 07:59:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-11-16 07:59:56,130 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 07:59:56,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:56,200 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-11-16 07:59:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 07:59:56,201 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 07:59:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:56,202 INFO L225 Difference]: With dead ends: 42 [2024-11-16 07:59:56,202 INFO L226 Difference]: Without dead ends: 37 [2024-11-16 07:59:56,202 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 07:59:56,203 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, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 07:59:56,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 07:59:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-16 07:59:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-16 07:59:56,206 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 07:59:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2024-11-16 07:59:56,206 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 53 [2024-11-16 07:59:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:56,207 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2024-11-16 07:59:56,207 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 07:59:56,207 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2024-11-16 07:59:56,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-16 07:59:56,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:56,208 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:56,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-16 07:59:56,409 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 07:59:56,410 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:56,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash -753980915, now seen corresponding path program 8 times [2024-11-16 07:59:56,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:56,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153055141] [2024-11-16 07:59:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:56,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:56,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:56,548 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:56,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:56,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:56,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:56,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:56,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:56,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:56,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:56,781 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 07:59:56,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:56,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153055141] [2024-11-16 07:59:56,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153055141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:56,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132575056] [2024-11-16 07:59:56,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 07:59:56,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:56,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:56,783 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 07:59:56,784 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 07:59:56,874 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 07:59:56,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:59:56,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-16 07:59:56,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:56,927 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 07:59:56,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 07:59:58,866 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 07:59:58,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132575056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 07:59:58,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 07:59:58,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2024-11-16 07:59:58,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981538934] [2024-11-16 07:59:58,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 07:59:58,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-16 07:59:58,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 07:59:58,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-16 07:59:58,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-11-16 07:59:58,868 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 07:59:58,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 07:59:58,979 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2024-11-16 07:59:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 07:59:58,980 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 07:59:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 07:59:58,982 INFO L225 Difference]: With dead ends: 45 [2024-11-16 07:59:58,982 INFO L226 Difference]: Without dead ends: 40 [2024-11-16 07:59:58,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2024-11-16 07:59:58,983 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 68 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 07:59:58,983 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 07:59:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-16 07:59:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-16 07:59:58,990 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 07:59:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2024-11-16 07:59:58,990 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 59 [2024-11-16 07:59:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 07:59:58,990 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2024-11-16 07:59:58,991 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 07:59:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2024-11-16 07:59:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-16 07:59:58,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 07:59:58,994 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 07:59:59,006 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 07:59:59,197 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 07:59:59,198 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 07:59:59,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 07:59:59,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1024621717, now seen corresponding path program 9 times [2024-11-16 07:59:59,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 07:59:59,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92378592] [2024-11-16 07:59:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 07:59:59,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 07:59:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:59,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:59,329 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:59,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:59,428 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:59,466 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:59,495 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:59,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:59,543 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:59,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:59,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 07:59:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 07:59:59,601 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 07:59:59,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 07:59:59,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92378592] [2024-11-16 07:59:59,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92378592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 07:59:59,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023671080] [2024-11-16 07:59:59,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 07:59:59,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 07:59:59,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 07:59:59,603 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 07:59:59,604 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 07:59:59,727 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-16 07:59:59,727 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 07:59:59,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-16 07:59:59,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 07:59:59,786 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 07:59:59,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:02,393 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 08:00:02,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023671080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:02,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:02,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2024-11-16 08:00:02,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324948077] [2024-11-16 08:00:02,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:02,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-16 08:00:02,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-16 08:00:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-11-16 08:00:02,396 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 08:00:02,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:02,500 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-11-16 08:00:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 08:00:02,501 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 08:00:02,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:02,502 INFO L225 Difference]: With dead ends: 48 [2024-11-16 08:00:02,502 INFO L226 Difference]: Without dead ends: 43 [2024-11-16 08:00:02,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 08:00:02,503 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 08:00:02,504 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 08:00:02,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-16 08:00:02,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-16 08:00:02,510 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 08:00:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2024-11-16 08:00:02,511 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 65 [2024-11-16 08:00:02,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:02,511 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2024-11-16 08:00:02,511 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 08:00:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2024-11-16 08:00:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-16 08:00:02,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:02,512 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:02,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 08:00:02,716 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 08:00:02,717 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:02,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash -971300531, now seen corresponding path program 10 times [2024-11-16 08:00:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:02,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069351915] [2024-11-16 08:00:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:02,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:02,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:02,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:02,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:02,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:03,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:03,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:03,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:03,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:03,127 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:03,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:03,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:03,179 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 08:00:03,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:03,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069351915] [2024-11-16 08:00:03,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069351915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:03,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549975323] [2024-11-16 08:00:03,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 08:00:03,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:03,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:03,181 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 08:00:03,182 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 08:00:03,345 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 08:00:03,345 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:03,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-16 08:00:03,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:03,411 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 08:00:03,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:07,007 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 08:00:07,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549975323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:07,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:07,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2024-11-16 08:00:07,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838049762] [2024-11-16 08:00:07,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:07,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 08:00:07,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:07,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 08:00:07,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-11-16 08:00:07,009 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 08:00:07,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:07,117 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2024-11-16 08:00:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 08:00:07,117 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 08:00:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:07,118 INFO L225 Difference]: With dead ends: 51 [2024-11-16 08:00:07,118 INFO L226 Difference]: Without dead ends: 46 [2024-11-16 08:00:07,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=958, Unknown=0, NotChecked=0, Total=1406 [2024-11-16 08:00:07,119 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 08:00:07,119 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 08:00:07,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-16 08:00:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-16 08:00:07,123 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 08:00:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2024-11-16 08:00:07,123 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 71 [2024-11-16 08:00:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:07,123 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2024-11-16 08:00:07,123 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 08:00:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2024-11-16 08:00:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-16 08:00:07,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:07,124 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:07,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-16 08:00:07,325 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 08:00:07,325 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:07,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:07,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1835662379, now seen corresponding path program 11 times [2024-11-16 08:00:07,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:07,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820371569] [2024-11-16 08:00:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:07,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,600 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,825 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:07,841 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 08:00:07,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:07,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820371569] [2024-11-16 08:00:07,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820371569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:07,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022853259] [2024-11-16 08:00:07,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 08:00:07,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:07,843 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 08:00:07,844 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 08:00:08,076 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-16 08:00:08,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:08,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-16 08:00:08,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:08,142 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 08:00:08,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:12,740 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 08:00:12,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022853259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:12,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:12,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2024-11-16 08:00:12,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955157446] [2024-11-16 08:00:12,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:12,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-16 08:00:12,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-16 08:00:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2024-11-16 08:00:12,744 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 08:00:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:12,926 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2024-11-16 08:00:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 08:00:12,926 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 08:00:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:12,927 INFO L225 Difference]: With dead ends: 54 [2024-11-16 08:00:12,927 INFO L226 Difference]: Without dead ends: 49 [2024-11-16 08:00:12,928 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 08:00:12,928 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 08:00:12,928 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 08:00:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-16 08:00:12,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-16 08:00:12,934 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 08:00:12,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2024-11-16 08:00:12,935 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 77 [2024-11-16 08:00:12,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:12,935 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2024-11-16 08:00:12,935 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 08:00:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2024-11-16 08:00:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-16 08:00:12,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:12,936 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:12,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-16 08:00:13,140 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 08:00:13,140 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:13,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1357141875, now seen corresponding path program 12 times [2024-11-16 08:00:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:13,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277791106] [2024-11-16 08:00:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:13,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,542 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 08:00:13,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,680 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,737 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:13,754 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 08:00:13,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:13,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277791106] [2024-11-16 08:00:13,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277791106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:13,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155617456] [2024-11-16 08:00:13,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 08:00:13,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:13,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:13,758 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 08:00:13,759 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 08:00:14,011 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-16 08:00:14,011 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:14,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-16 08:00:14,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:14,080 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 08:00:14,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:19,703 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 08:00:19,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155617456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:19,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:19,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2024-11-16 08:00:19,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024389590] [2024-11-16 08:00:19,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:19,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-16 08:00:19,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-16 08:00:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-11-16 08:00:19,706 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 08:00:19,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:19,839 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2024-11-16 08:00:19,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 08:00:19,840 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 08:00:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:19,840 INFO L225 Difference]: With dead ends: 57 [2024-11-16 08:00:19,842 INFO L226 Difference]: Without dead ends: 52 [2024-11-16 08:00:19,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=606, Invalid=1286, Unknown=0, NotChecked=0, Total=1892 [2024-11-16 08:00:19,843 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 08:00:19,844 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 08:00:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-16 08:00:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-16 08:00:19,849 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 08:00:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2024-11-16 08:00:19,850 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 83 [2024-11-16 08:00:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:19,850 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2024-11-16 08:00:19,850 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 08:00:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2024-11-16 08:00:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-16 08:00:19,851 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:19,851 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:19,864 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 08:00:20,054 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 08:00:20,055 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:20,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:20,055 INFO L85 PathProgramCache]: Analyzing trace with hash -392960789, now seen corresponding path program 13 times [2024-11-16 08:00:20,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:20,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611216935] [2024-11-16 08:00:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:20,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,589 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,680 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:20,758 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 08:00:20,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:20,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611216935] [2024-11-16 08:00:20,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611216935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:20,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796214002] [2024-11-16 08:00:20,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 08:00:20,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:20,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:20,760 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 08:00:20,761 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 08:00:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:21,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-16 08:00:21,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:21,168 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 08:00:21,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:28,517 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 08:00:28,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796214002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:28,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:28,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2024-11-16 08:00:28,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338758140] [2024-11-16 08:00:28,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:28,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-16 08:00:28,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-16 08:00:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2024-11-16 08:00:28,522 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 08:00:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:28,646 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2024-11-16 08:00:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 08:00:28,646 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 08:00:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:28,647 INFO L225 Difference]: With dead ends: 60 [2024-11-16 08:00:28,647 INFO L226 Difference]: Without dead ends: 55 [2024-11-16 08:00:28,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 175 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=694, Invalid=1468, Unknown=0, NotChecked=0, Total=2162 [2024-11-16 08:00:28,648 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 08:00:28,648 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 08:00:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-16 08:00:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-16 08:00:28,651 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 08:00:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2024-11-16 08:00:28,652 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 89 [2024-11-16 08:00:28,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:28,652 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2024-11-16 08:00:28,652 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 08:00:28,652 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2024-11-16 08:00:28,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-16 08:00:28,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:28,653 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:28,667 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 08:00:28,854 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 08:00:28,854 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:28,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:28,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1743044557, now seen corresponding path program 14 times [2024-11-16 08:00:28,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:28,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317727279] [2024-11-16 08:00:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:28,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:28,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,032 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,101 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,249 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,316 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,435 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,466 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,585 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:00:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:00:29,604 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 08:00:29,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:00:29,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317727279] [2024-11-16 08:00:29,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317727279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:00:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149686719] [2024-11-16 08:00:29,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 08:00:29,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:00:29,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:00:29,608 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 08:00:29,610 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 08:00:30,030 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 08:00:30,031 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:00:30,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-16 08:00:30,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:00:30,130 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 08:00:30,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:00:39,106 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 08:00:39,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149686719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:00:39,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:00:39,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 35 [2024-11-16 08:00:39,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64447168] [2024-11-16 08:00:39,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:00:39,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-16 08:00:39,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:00:39,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-16 08:00:39,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 08:00:39,108 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 35 states, 34 states have (on average 2.088235294117647) internal successors, (71), 35 states have internal predecessors, (71), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) [2024-11-16 08:00:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:00:39,265 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-11-16 08:00:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 08:00:39,265 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.088235294117647) internal successors, (71), 35 states have internal predecessors, (71), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) Word has length 95 [2024-11-16 08:00:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:00:39,266 INFO L225 Difference]: With dead ends: 63 [2024-11-16 08:00:39,266 INFO L226 Difference]: Without dead ends: 58 [2024-11-16 08:00:39,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 16 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=785, Invalid=1567, Unknown=0, NotChecked=0, Total=2352 [2024-11-16 08:00:39,267 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:00:39,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 130 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:00:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-16 08:00:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-16 08:00:39,271 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 08:00:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2024-11-16 08:00:39,271 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 95 [2024-11-16 08:00:39,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:00:39,271 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2024-11-16 08:00:39,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.088235294117647) internal successors, (71), 35 states have internal predecessors, (71), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) [2024-11-16 08:00:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2024-11-16 08:00:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-16 08:00:39,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:00:39,275 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:00:39,289 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 08:00:39,479 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 08:00:39,479 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:00:39,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:00:39,480 INFO L85 PathProgramCache]: Analyzing trace with hash -132694613, now seen corresponding path program 15 times [2024-11-16 08:00:39,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:00:39,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436446037] [2024-11-16 08:00:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:00:39,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:00:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 08:00:39,498 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 08:00:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 08:00:39,539 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 08:00:39,539 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 08:00:39,540 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-16 08:00:39,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-16 08:00:39,543 INFO L407 BasicCegarLoop]: Path program histogram: [15, 1] [2024-11-16 08:00:39,584 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-16 08:00:39,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 08:00:39 BoogieIcfgContainer [2024-11-16 08:00:39,586 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-16 08:00:39,586 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-16 08:00:39,586 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-16 08:00:39,587 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-16 08:00:39,587 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:59:47" (3/4) ... [2024-11-16 08:00:39,587 INFO L137 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-16 08:00:39,632 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-16 08:00:39,632 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-16 08:00:39,633 INFO L158 Benchmark]: Toolchain (without parser) took 53045.63ms. Allocated memory was 151.0MB in the beginning and 553.6MB in the end (delta: 402.7MB). Free memory was 81.8MB in the beginning and 326.3MB in the end (delta: -244.6MB). Peak memory consumption was 159.5MB. Max. memory is 16.1GB. [2024-11-16 08:00:39,633 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory was 74.5MB in the beginning and 74.4MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-16 08:00:39,633 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.43ms. Allocated memory is still 151.0MB. Free memory was 81.6MB in the beginning and 69.7MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-16 08:00:39,633 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.68ms. Allocated memory is still 151.0MB. Free memory was 69.7MB in the beginning and 124.9MB in the end (delta: -55.1MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. [2024-11-16 08:00:39,634 INFO L158 Benchmark]: Boogie Preprocessor took 39.80ms. Allocated memory is still 151.0MB. Free memory was 124.9MB in the beginning and 123.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 08:00:39,634 INFO L158 Benchmark]: IcfgBuilder took 195.57ms. Allocated memory is still 151.0MB. Free memory was 123.4MB in the beginning and 113.0MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-16 08:00:39,634 INFO L158 Benchmark]: TraceAbstraction took 52542.11ms. Allocated memory was 151.0MB in the beginning and 553.6MB in the end (delta: 402.7MB). Free memory was 112.3MB in the beginning and 329.5MB in the end (delta: -217.2MB). Peak memory consumption was 187.1MB. Max. memory is 16.1GB. [2024-11-16 08:00:39,634 INFO L158 Benchmark]: Witness Printer took 46.14ms. Allocated memory is still 553.6MB. Free memory was 329.5MB in the beginning and 326.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 08:00:39,635 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory was 74.5MB in the beginning and 74.4MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.43ms. Allocated memory is still 151.0MB. Free memory was 81.6MB in the beginning and 69.7MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.68ms. Allocated memory is still 151.0MB. Free memory was 69.7MB in the beginning and 124.9MB in the end (delta: -55.1MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.80ms. Allocated memory is still 151.0MB. Free memory was 124.9MB in the beginning and 123.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 195.57ms. Allocated memory is still 151.0MB. Free memory was 123.4MB in the beginning and 113.0MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 52542.11ms. Allocated memory was 151.0MB in the beginning and 553.6MB in the end (delta: 402.7MB). Free memory was 112.3MB in the beginning and 329.5MB in the end (delta: -217.2MB). Peak memory consumption was 187.1MB. Max. memory is 16.1GB. * Witness Printer took 46.14ms. Allocated memory is still 553.6MB. Free memory was 329.5MB in the beginning and 326.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 15; [L15] int b = 0; VAL [a=15, b=0] [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=15, \old(n)=0, \result=15] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) VAL [a=15, b=0] [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 52.4s, OverallIterations: 16, TraceHistogramMax: 16, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 797 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 647 mSDsluCounter, 1313 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1146 mSDsCounter, 234 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1014 IncrementalHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 234 mSolverCounterUnsat, 167 mSDtfsCounter, 1014 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2050 GetRequests, 1529 SyntacticMatches, 120 SemanticMatches, 401 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5366 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=15, InterpolantAutomatonStates: 180, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 45.6s InterpolantComputationTime, 1680 NumberOfCodeBlocks, 1680 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 2320 ConstructedInterpolants, 0 QuantifiedInterpolants, 6710 SizeOfPredicates, 105 NumberOfNonLiveVariables, 2576 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 43 InterpolantComputations, 1 PerfectInterpolantSequences, 3710/9450 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-16 08:00:39,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE