./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f 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/array-fpi/ifeqn3.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 c28ec531d32a995842654b11d319d79f5f6e1bd0d3e33d9bd3cc173d0787760c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 18:23:59,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 18:23:59,286 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 18:23:59,290 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 18:23:59,292 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 18:23:59,323 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 18:23:59,324 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 18:23:59,324 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 18:23:59,324 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 18:23:59,325 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 18:23:59,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 18:23:59,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 18:23:59,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 18:23:59,331 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 18:23:59,332 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 18:23:59,332 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 18:23:59,332 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 18:23:59,332 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 18:23:59,333 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 18:23:59,333 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 18:23:59,333 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 18:23:59,334 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 18:23:59,334 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 18:23:59,337 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 18:23:59,337 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 18:23:59,337 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 18:23:59,337 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 18:23:59,338 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 18:23:59,338 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 18:23:59,338 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 18:23:59,338 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 18:23:59,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 18:23:59,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 18:23:59,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 18:23:59,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 18:23:59,340 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 18:23:59,340 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 18:23:59,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 18:23:59,340 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 18:23:59,341 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 18:23:59,342 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 18:23:59,342 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 18:23:59,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c28ec531d32a995842654b11d319d79f5f6e1bd0d3e33d9bd3cc173d0787760c [2024-11-09 18:23:59,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 18:23:59,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 18:23:59,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 18:23:59,635 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 18:23:59,635 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 18:23:59,637 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn3.c [2024-11-09 18:24:01,245 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 18:24:01,463 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 18:24:01,463 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn3.c [2024-11-09 18:24:01,470 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0540e1908/4bfae812ff76482ba12bbf58de091df2/FLAGe406322d1 [2024-11-09 18:24:01,484 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0540e1908/4bfae812ff76482ba12bbf58de091df2 [2024-11-09 18:24:01,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 18:24:01,489 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 18:24:01,491 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 18:24:01,492 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 18:24:01,497 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 18:24:01,498 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,499 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21933c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01, skipping insertion in model container [2024-11-09 18:24:01,499 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,521 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 18:24:01,702 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2024-11-09 18:24:01,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 18:24:01,737 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 18:24:01,749 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2024-11-09 18:24:01,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 18:24:01,779 INFO L204 MainTranslator]: Completed translation [2024-11-09 18:24:01,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01 WrapperNode [2024-11-09 18:24:01,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 18:24:01,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 18:24:01,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 18:24:01,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 18:24:01,787 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,827 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,845 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-11-09 18:24:01,847 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 18:24:01,848 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 18:24:01,848 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 18:24:01,848 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 18:24:01,858 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,864 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,885 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2024-11-09 18:24:01,885 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,886 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,892 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,896 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,897 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,898 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 18:24:01,903 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 18:24:01,903 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 18:24:01,903 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 18:24:01,904 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (1/1) ... [2024-11-09 18:24:01,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 18:24:01,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 18:24:01,951 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) [2024-11-09 18:24:01,957 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 [2024-11-09 18:24:01,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 18:24:01,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 18:24:01,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 18:24:01,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 18:24:01,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 18:24:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 18:24:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 18:24:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 18:24:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 18:24:01,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 18:24:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 18:24:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 18:24:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 18:24:02,067 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 18:24:02,069 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 18:24:02,206 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-09 18:24:02,207 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 18:24:02,217 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 18:24:02,217 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 18:24:02,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 06:24:02 BoogieIcfgContainer [2024-11-09 18:24:02,218 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 18:24:02,220 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 18:24:02,220 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 18:24:02,223 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 18:24:02,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:24:01" (1/3) ... [2024-11-09 18:24:02,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cd03d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:24:02, skipping insertion in model container [2024-11-09 18:24:02,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:24:01" (2/3) ... [2024-11-09 18:24:02,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cd03d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:24:02, skipping insertion in model container [2024-11-09 18:24:02,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 06:24:02" (3/3) ... [2024-11-09 18:24:02,226 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn3.c [2024-11-09 18:24:02,243 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 18:24:02,244 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 18:24:02,297 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 18:24:02,304 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;@7f1d39fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 18:24:02,304 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 18:24:02,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 18:24:02,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:02,314 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:02,315 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:02,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:02,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1069608112, now seen corresponding path program 1 times [2024-11-09 18:24:02,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:02,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576048879] [2024-11-09 18:24:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:02,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 18:24:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:02,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 18:24:02,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576048879] [2024-11-09 18:24:02,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576048879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 18:24:02,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 18:24:02,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 18:24:02,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194232247] [2024-11-09 18:24:02,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 18:24:02,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 18:24:02,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 18:24:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 18:24:02,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 18:24:02,517 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 18:24:02,532 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-11-09 18:24:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 18:24:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-09 18:24:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 18:24:02,543 INFO L225 Difference]: With dead ends: 49 [2024-11-09 18:24:02,543 INFO L226 Difference]: Without dead ends: 22 [2024-11-09 18:24:02,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 18:24:02,552 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 18:24:02,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 18:24:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-09 18:24:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-09 18:24:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-09 18:24:02,584 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2024-11-09 18:24:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 18:24:02,585 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-09 18:24:02,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-09 18:24:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 18:24:02,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:02,587 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:02,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 18:24:02,587 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:02,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1000123861, now seen corresponding path program 1 times [2024-11-09 18:24:02,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:02,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088533529] [2024-11-09 18:24:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:02,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 18:24:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:02,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 18:24:02,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088533529] [2024-11-09 18:24:02,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088533529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 18:24:02,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 18:24:02,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 18:24:02,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349481925] [2024-11-09 18:24:02,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 18:24:02,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 18:24:02,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 18:24:02,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 18:24:02,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 18:24:02,796 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 18:24:02,859 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2024-11-09 18:24:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 18:24:02,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-09 18:24:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 18:24:02,861 INFO L225 Difference]: With dead ends: 54 [2024-11-09 18:24:02,861 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 18:24:02,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 18:24:02,862 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 18:24:02,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 23 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 18:24:02,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 18:24:02,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2024-11-09 18:24:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-09 18:24:02,868 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2024-11-09 18:24:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 18:24:02,869 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-09 18:24:02,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-09 18:24:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 18:24:02,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:02,871 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:02,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 18:24:02,872 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:02,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:02,874 INFO L85 PathProgramCache]: Analyzing trace with hash -679156117, now seen corresponding path program 1 times [2024-11-09 18:24:02,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:02,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857043024] [2024-11-09 18:24:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:02,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 18:24:02,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486207850] [2024-11-09 18:24:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:02,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:02,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 18:24:02,931 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) [2024-11-09 18:24:02,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 18:24:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 18:24:03,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 18:24:03,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 18:24:03,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 18:24:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 18:24:03,153 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 18:24:03,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 18:24:03,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857043024] [2024-11-09 18:24:03,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 18:24:03,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486207850] [2024-11-09 18:24:03,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486207850] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 18:24:03,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 18:24:03,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 18:24:03,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23325204] [2024-11-09 18:24:03,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 18:24:03,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 18:24:03,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 18:24:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 18:24:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 18:24:03,160 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 18:24:03,272 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2024-11-09 18:24:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 18:24:03,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-09 18:24:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 18:24:03,273 INFO L225 Difference]: With dead ends: 47 [2024-11-09 18:24:03,273 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 18:24:03,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 18:24:03,274 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 18:24:03,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 18:24:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 18:24:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2024-11-09 18:24:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-11-09 18:24:03,280 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2024-11-09 18:24:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 18:24:03,281 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-11-09 18:24:03,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-11-09 18:24:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 18:24:03,282 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:03,282 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:03,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 18:24:03,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:03,487 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:03,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:03,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1393513842, now seen corresponding path program 1 times [2024-11-09 18:24:03,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:03,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988084961] [2024-11-09 18:24:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:03,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 18:24:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 18:24:03,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 18:24:03,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988084961] [2024-11-09 18:24:03,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988084961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 18:24:03,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108260811] [2024-11-09 18:24:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:03,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:03,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 18:24:03,662 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) [2024-11-09 18:24:03,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 18:24:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 18:24:03,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 18:24:03,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 18:24:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 18:24:03,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 18:24:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 18:24:03,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108260811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 18:24:03,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 18:24:03,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-09 18:24:03,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624666088] [2024-11-09 18:24:03,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 18:24:03,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 18:24:03,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 18:24:03,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 18:24:03,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-09 18:24:03,869 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:04,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 18:24:04,044 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2024-11-09 18:24:04,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 18:24:04,044 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-09 18:24:04,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 18:24:04,045 INFO L225 Difference]: With dead ends: 85 [2024-11-09 18:24:04,047 INFO L226 Difference]: Without dead ends: 52 [2024-11-09 18:24:04,047 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-09 18:24:04,049 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 18:24:04,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 77 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 18:24:04,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-09 18:24:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 34. [2024-11-09 18:24:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-11-09 18:24:04,058 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 28 [2024-11-09 18:24:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 18:24:04,058 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-11-09 18:24:04,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-11-09 18:24:04,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 18:24:04,059 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:04,060 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:04,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 18:24:04,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-09 18:24:04,261 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:04,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:04,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1003348149, now seen corresponding path program 1 times [2024-11-09 18:24:04,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:04,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850746571] [2024-11-09 18:24:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:04,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 18:24:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712265012] [2024-11-09 18:24:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:04,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 18:24:04,368 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) [2024-11-09 18:24:04,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 18:24:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 18:24:04,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 18:24:04,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 18:24:04,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 18:24:04,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-11-09 18:24:04,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-09 18:24:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:04,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 18:24:04,813 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 18:24:04,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 163 [2024-11-09 18:24:05,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2024-11-09 18:24:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 18:24:05,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 18:24:05,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850746571] [2024-11-09 18:24:05,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 18:24:05,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712265012] [2024-11-09 18:24:05,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712265012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 18:24:05,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 18:24:05,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-09 18:24:05,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669000201] [2024-11-09 18:24:05,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 18:24:05,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 18:24:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 18:24:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 18:24:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-09 18:24:05,051 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:05,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 18:24:05,355 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2024-11-09 18:24:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 18:24:05,359 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-09 18:24:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 18:24:05,360 INFO L225 Difference]: With dead ends: 133 [2024-11-09 18:24:05,361 INFO L226 Difference]: Without dead ends: 107 [2024-11-09 18:24:05,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-09 18:24:05,362 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 18:24:05,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 173 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 18:24:05,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-09 18:24:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 51. [2024-11-09 18:24:05,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-11-09 18:24:05,378 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 32 [2024-11-09 18:24:05,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 18:24:05,378 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-11-09 18:24:05,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-11-09 18:24:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 18:24:05,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:05,381 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:05,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 18:24:05,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:05,582 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:05,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1119166034, now seen corresponding path program 1 times [2024-11-09 18:24:05,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:05,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031782281] [2024-11-09 18:24:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:05,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 18:24:05,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319972020] [2024-11-09 18:24:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:05,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:05,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 18:24:05,643 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) [2024-11-09 18:24:05,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 18:24:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 18:24:05,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 18:24:05,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 18:24:05,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 18:24:05,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 18:24:05,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 18:24:05,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-09 18:24:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:06,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 18:24:06,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2024-11-09 18:24:06,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 18:24:06,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 73 [2024-11-09 18:24:06,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2024-11-09 18:24:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:06,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 18:24:06,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031782281] [2024-11-09 18:24:06,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 18:24:06,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319972020] [2024-11-09 18:24:06,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319972020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 18:24:06,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 18:24:06,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2024-11-09 18:24:06,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618826719] [2024-11-09 18:24:06,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 18:24:06,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 18:24:06,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 18:24:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 18:24:06,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-11-09 18:24:06,801 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 18:24:09,749 INFO L93 Difference]: Finished difference Result 296 states and 329 transitions. [2024-11-09 18:24:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 18:24:09,750 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-09 18:24:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 18:24:09,753 INFO L225 Difference]: With dead ends: 296 [2024-11-09 18:24:09,753 INFO L226 Difference]: Without dead ends: 293 [2024-11-09 18:24:09,754 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 18:24:09,754 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 530 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 18:24:09,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 407 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 18:24:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-09 18:24:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 133. [2024-11-09 18:24:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.2272727272727273) internal successors, (162), 132 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2024-11-09 18:24:09,807 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 36 [2024-11-09 18:24:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 18:24:09,808 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2024-11-09 18:24:09,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2024-11-09 18:24:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 18:24:09,809 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:09,809 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:09,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 18:24:10,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:10,011 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:10,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:10,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1174191655, now seen corresponding path program 2 times [2024-11-09 18:24:10,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:10,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116160615] [2024-11-09 18:24:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:10,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 18:24:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 18:24:10,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 18:24:10,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116160615] [2024-11-09 18:24:10,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116160615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 18:24:10,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461028186] [2024-11-09 18:24:10,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 18:24:10,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:10,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 18:24:10,243 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) [2024-11-09 18:24:10,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 18:24:10,309 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 18:24:10,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 18:24:10,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 18:24:10,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 18:24:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 18:24:10,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 18:24:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 18:24:10,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461028186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 18:24:10,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 18:24:10,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-09 18:24:10,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280333570] [2024-11-09 18:24:10,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 18:24:10,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 18:24:10,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 18:24:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 18:24:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-09 18:24:10,480 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:10,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 18:24:10,641 INFO L93 Difference]: Finished difference Result 263 states and 307 transitions. [2024-11-09 18:24:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 18:24:10,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-09 18:24:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 18:24:10,645 INFO L225 Difference]: With dead ends: 263 [2024-11-09 18:24:10,645 INFO L226 Difference]: Without dead ends: 168 [2024-11-09 18:24:10,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-09 18:24:10,646 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 18:24:10,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 141 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 18:24:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-09 18:24:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 141. [2024-11-09 18:24:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 140 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 166 transitions. [2024-11-09 18:24:10,664 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 166 transitions. Word has length 40 [2024-11-09 18:24:10,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 18:24:10,665 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 166 transitions. [2024-11-09 18:24:10,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 166 transitions. [2024-11-09 18:24:10,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 18:24:10,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:10,666 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:10,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 18:24:10,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:10,871 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:10,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:10,872 INFO L85 PathProgramCache]: Analyzing trace with hash 522942393, now seen corresponding path program 3 times [2024-11-09 18:24:10,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:10,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615530529] [2024-11-09 18:24:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:10,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 18:24:10,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294149906] [2024-11-09 18:24:10,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 18:24:10,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:10,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 18:24:10,939 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) [2024-11-09 18:24:10,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 18:24:11,610 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 18:24:11,610 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 18:24:11,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 18:24:11,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 18:24:11,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 18:24:11,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-09 18:24:12,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 18:24:12,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-11-09 18:24:12,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 18:24:12,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-09 18:24:12,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 18:24:12,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-09 18:24:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:12,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 18:24:13,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 91 [2024-11-09 18:24:13,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 18:24:13,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 548 treesize of output 502 [2024-11-09 18:24:21,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-09 18:24:21,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 91 [2024-11-09 18:24:21,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 18:24:21,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2262 treesize of output 1914 [2024-11-09 18:24:21,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 93 [2024-11-09 18:24:21,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 18:24:21,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 425 treesize of output 332 [2024-11-09 18:24:21,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-09 18:24:22,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 95 [2024-11-09 18:24:22,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 68 [2024-11-09 18:24:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:22,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 18:24:22,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615530529] [2024-11-09 18:24:22,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 18:24:22,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294149906] [2024-11-09 18:24:22,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294149906] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 18:24:22,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 18:24:22,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2024-11-09 18:24:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587336500] [2024-11-09 18:24:22,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 18:24:22,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 18:24:22,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 18:24:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 18:24:22,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1412, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 18:24:22,152 INFO L87 Difference]: Start difference. First operand 141 states and 166 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 42 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:37,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 18:24:37,305 INFO L93 Difference]: Finished difference Result 596 states and 676 transitions. [2024-11-09 18:24:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-09 18:24:37,305 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 42 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-09 18:24:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 18:24:37,307 INFO L225 Difference]: With dead ends: 596 [2024-11-09 18:24:37,307 INFO L226 Difference]: Without dead ends: 463 [2024-11-09 18:24:37,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3672 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=3129, Invalid=9527, Unknown=0, NotChecked=0, Total=12656 [2024-11-09 18:24:37,316 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 1053 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-09 18:24:37,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 692 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-09 18:24:37,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2024-11-09 18:24:37,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 255. [2024-11-09 18:24:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.2007874015748032) internal successors, (305), 254 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 305 transitions. [2024-11-09 18:24:37,362 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 305 transitions. Word has length 48 [2024-11-09 18:24:37,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 18:24:37,363 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 305 transitions. [2024-11-09 18:24:37,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 42 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 305 transitions. [2024-11-09 18:24:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 18:24:37,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:37,368 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:37,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 18:24:37,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:37,569 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:37,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash 780337765, now seen corresponding path program 2 times [2024-11-09 18:24:37,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:37,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934484468] [2024-11-09 18:24:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:37,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 18:24:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:37,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 18:24:37,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934484468] [2024-11-09 18:24:37,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934484468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 18:24:37,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521012477] [2024-11-09 18:24:37,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 18:24:37,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:37,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 18:24:37,802 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) [2024-11-09 18:24:37,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 18:24:37,870 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 18:24:37,871 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 18:24:37,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 18:24:37,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 18:24:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 18:24:37,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 18:24:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 18:24:38,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521012477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 18:24:38,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 18:24:38,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2024-11-09 18:24:38,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560848667] [2024-11-09 18:24:38,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 18:24:38,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 18:24:38,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 18:24:38,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 18:24:38,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-11-09 18:24:38,056 INFO L87 Difference]: Start difference. First operand 255 states and 305 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:38,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 18:24:38,321 INFO L93 Difference]: Finished difference Result 412 states and 474 transitions. [2024-11-09 18:24:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 18:24:38,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-09 18:24:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 18:24:38,323 INFO L225 Difference]: With dead ends: 412 [2024-11-09 18:24:38,323 INFO L226 Difference]: Without dead ends: 258 [2024-11-09 18:24:38,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2024-11-09 18:24:38,324 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 134 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 18:24:38,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 160 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 18:24:38,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-09 18:24:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 204. [2024-11-09 18:24:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1822660098522169) internal successors, (240), 203 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 240 transitions. [2024-11-09 18:24:38,395 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 240 transitions. Word has length 48 [2024-11-09 18:24:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 18:24:38,396 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 240 transitions. [2024-11-09 18:24:38,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:38,396 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 240 transitions. [2024-11-09 18:24:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 18:24:38,397 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:38,397 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:38,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 18:24:38,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:38,598 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:38,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:38,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1814863323, now seen corresponding path program 4 times [2024-11-09 18:24:38,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:38,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121405982] [2024-11-09 18:24:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:38,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 18:24:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 18:24:38,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 18:24:38,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121405982] [2024-11-09 18:24:38,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121405982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 18:24:38,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714595269] [2024-11-09 18:24:38,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 18:24:38,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:38,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 18:24:38,913 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) [2024-11-09 18:24:38,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 18:24:38,969 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 18:24:38,970 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 18:24:38,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 18:24:38,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 18:24:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 18:24:39,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 18:24:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 18:24:39,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714595269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 18:24:39,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 18:24:39,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2024-11-09 18:24:39,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732378236] [2024-11-09 18:24:39,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 18:24:39,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 18:24:39,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 18:24:39,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 18:24:39,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-09 18:24:39,159 INFO L87 Difference]: Start difference. First operand 204 states and 240 transitions. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 18:24:39,609 INFO L93 Difference]: Finished difference Result 375 states and 435 transitions. [2024-11-09 18:24:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 18:24:39,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-09 18:24:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 18:24:39,611 INFO L225 Difference]: With dead ends: 375 [2024-11-09 18:24:39,611 INFO L226 Difference]: Without dead ends: 179 [2024-11-09 18:24:39,612 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 18:24:39,613 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 238 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 18:24:39,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 333 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 18:24:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-09 18:24:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 93. [2024-11-09 18:24:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.076086956521739) internal successors, (99), 92 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2024-11-09 18:24:39,631 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 48 [2024-11-09 18:24:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 18:24:39,631 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2024-11-09 18:24:39,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2024-11-09 18:24:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 18:24:39,632 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:39,632 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:39,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 18:24:39,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 18:24:39,833 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:39,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:39,834 INFO L85 PathProgramCache]: Analyzing trace with hash -397231640, now seen corresponding path program 3 times [2024-11-09 18:24:39,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:39,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094047024] [2024-11-09 18:24:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:39,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 18:24:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:40,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 18:24:40,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094047024] [2024-11-09 18:24:40,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094047024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 18:24:40,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18197479] [2024-11-09 18:24:40,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 18:24:40,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:40,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 18:24:40,097 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) [2024-11-09 18:24:40,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 18:24:40,863 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 18:24:40,863 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 18:24:40,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 18:24:40,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 18:24:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:40,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 18:24:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:41,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18197479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 18:24:41,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 18:24:41,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-09 18:24:41,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842242789] [2024-11-09 18:24:41,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 18:24:41,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 18:24:41,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 18:24:41,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 18:24:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-09 18:24:41,100 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 18:24:41,348 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2024-11-09 18:24:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 18:24:41,348 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-09 18:24:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 18:24:41,349 INFO L225 Difference]: With dead ends: 165 [2024-11-09 18:24:41,350 INFO L226 Difference]: Without dead ends: 138 [2024-11-09 18:24:41,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-11-09 18:24:41,351 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 189 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 18:24:41,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 195 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 18:24:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-09 18:24:41,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2024-11-09 18:24:41,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 92 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2024-11-09 18:24:41,373 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 52 [2024-11-09 18:24:41,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 18:24:41,374 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2024-11-09 18:24:41,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 18:24:41,375 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2024-11-09 18:24:41,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 18:24:41,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 18:24:41,376 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 18:24:41,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 18:24:41,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:41,577 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 18:24:41,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 18:24:41,578 INFO L85 PathProgramCache]: Analyzing trace with hash -70120807, now seen corresponding path program 5 times [2024-11-09 18:24:41,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 18:24:41,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76304369] [2024-11-09 18:24:41,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 18:24:41,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 18:24:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 18:24:41,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398888161] [2024-11-09 18:24:41,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 18:24:41,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 18:24:41,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 18:24:41,689 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) [2024-11-09 18:24:41,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 18:24:42,185 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-09 18:24:42,185 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 18:24:42,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 18:24:42,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 18:24:42,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 18:24:42,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-09 18:24:42,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 18:24:42,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-09 18:24:42,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 18:24:42,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2024-11-09 18:24:42,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 18:24:42,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-09 18:24:42,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 18:24:42,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-09 18:24:42,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 18:24:42,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-09 18:24:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 20 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 18:24:43,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 18:24:52,825 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 18:25:33,513 WARN L286 SmtUtils]: Spent 24.19s on a formula simplification. DAG size of input: 76 DAG size of output: 73 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)