./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i --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/loop-invgen/sendmail-close-angle.i -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 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 22:17:12,817 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 22:17:12,888 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 22:17:12,894 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 22:17:12,895 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 22:17:12,919 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 22:17:12,919 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 22:17:12,920 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 22:17:12,920 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 22:17:12,920 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 22:17:12,920 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 22:17:12,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 22:17:12,921 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 22:17:12,921 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 22:17:12,921 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 22:17:12,922 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 22:17:12,922 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 22:17:12,922 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 22:17:12,926 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 22:17:12,926 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 22:17:12,927 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 22:17:12,927 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 22:17:12,927 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 22:17:12,927 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 22:17:12,927 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 22:17:12,927 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 22:17:12,928 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 22:17:12,928 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 22:17:12,928 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 22:17:12,928 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 22:17:12,928 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 22:17:12,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 22:17:12,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:17:12,928 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 22:17:12,929 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 22:17:12,929 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 22:17:12,929 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 22:17:12,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 22:17:12,929 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 22:17:12,929 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 22:17:12,929 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 22:17:12,933 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 22:17:12,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 [2024-11-09 22:17:13,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 22:17:13,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 22:17:13,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 22:17:13,147 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 22:17:13,148 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 22:17:13,149 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2024-11-09 22:17:14,364 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 22:17:14,528 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 22:17:14,529 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2024-11-09 22:17:14,541 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa70fdc2f/c8cb83a84e904552b093cf1e94388757/FLAG7e6737a02 [2024-11-09 22:17:14,909 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa70fdc2f/c8cb83a84e904552b093cf1e94388757 [2024-11-09 22:17:14,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 22:17:14,912 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 22:17:14,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 22:17:14,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 22:17:14,917 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 22:17:14,917 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:17:14" (1/1) ... [2024-11-09 22:17:14,918 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489456bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:14, skipping insertion in model container [2024-11-09 22:17:14,918 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:17:14" (1/1) ... [2024-11-09 22:17:14,933 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 22:17:15,063 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/loop-invgen/sendmail-close-angle.i[893,906] [2024-11-09 22:17:15,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:17:15,081 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 22:17:15,089 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/loop-invgen/sendmail-close-angle.i[893,906] [2024-11-09 22:17:15,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:17:15,105 INFO L204 MainTranslator]: Completed translation [2024-11-09 22:17:15,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15 WrapperNode [2024-11-09 22:17:15,105 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 22:17:15,106 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 22:17:15,106 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 22:17:15,106 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 22:17:15,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,116 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,127 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2024-11-09 22:17:15,127 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 22:17:15,128 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 22:17:15,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 22:17:15,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 22:17:15,134 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,135 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,135 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,143 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-09 22:17:15,143 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,143 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,180 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,181 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,181 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,182 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 22:17:15,188 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 22:17:15,188 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 22:17:15,188 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 22:17:15,193 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (1/1) ... [2024-11-09 22:17:15,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:17:15,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:17:15,250 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 22:17:15,253 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 22:17:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 22:17:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 22:17:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 22:17:15,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 22:17:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 22:17:15,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 22:17:15,339 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 22:17:15,342 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 22:17:15,468 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-09 22:17:15,468 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 22:17:15,479 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 22:17:15,480 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 22:17:15,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:17:15 BoogieIcfgContainer [2024-11-09 22:17:15,481 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 22:17:15,483 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 22:17:15,483 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 22:17:15,485 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 22:17:15,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:17:14" (1/3) ... [2024-11-09 22:17:15,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d25d228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:17:15, skipping insertion in model container [2024-11-09 22:17:15,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:17:15" (2/3) ... [2024-11-09 22:17:15,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d25d228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:17:15, skipping insertion in model container [2024-11-09 22:17:15,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:17:15" (3/3) ... [2024-11-09 22:17:15,488 INFO L112 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2024-11-09 22:17:15,501 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 22:17:15,501 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 22:17:15,548 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 22:17:15,553 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;@1707ebcb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 22:17:15,553 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 22:17:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 22:17:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 22:17:15,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:17:15,563 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:15,563 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:17:15,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:17:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1719796118, now seen corresponding path program 1 times [2024-11-09 22:17:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:17:15,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090768434] [2024-11-09 22:17:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:17:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:15,709 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 22:17:15,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:17:15,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090768434] [2024-11-09 22:17:15,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090768434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:17:15,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:17:15,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 22:17:15,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197677209] [2024-11-09 22:17:15,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:17:15,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 22:17:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:17:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 22:17:15,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 22:17:15,738 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:17:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:17:15,757 INFO L93 Difference]: Finished difference Result 58 states and 89 transitions. [2024-11-09 22:17:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 22:17:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 22:17:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:17:15,763 INFO L225 Difference]: With dead ends: 58 [2024-11-09 22:17:15,763 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 22:17:15,766 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 22:17:15,769 INFO L432 NwaCegarLoop]: 42 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, 42 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 22:17:15,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:17:15,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 22:17:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-09 22:17:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 22:17:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2024-11-09 22:17:15,800 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 11 [2024-11-09 22:17:15,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:17:15,801 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2024-11-09 22:17:15,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:17:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2024-11-09 22:17:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 22:17:15,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:17:15,803 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:15,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 22:17:15,804 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:17:15,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:17:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -22115628, now seen corresponding path program 1 times [2024-11-09 22:17:15,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:17:15,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800991699] [2024-11-09 22:17:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:15,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:17:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:15,993 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 22:17:15,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:17:15,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800991699] [2024-11-09 22:17:15,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800991699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:17:15,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:17:15,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:17:15,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958520742] [2024-11-09 22:17:15,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:17:15,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:17:15,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:17:15,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:17:15,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:17:15,999 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:17:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:17:16,080 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2024-11-09 22:17:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:17:16,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 22:17:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:17:16,081 INFO L225 Difference]: With dead ends: 33 [2024-11-09 22:17:16,081 INFO L226 Difference]: Without dead ends: 30 [2024-11-09 22:17:16,081 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:17:16,082 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:17:16,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:17:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-09 22:17:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-09 22:17:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 22:17:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-09 22:17:16,101 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2024-11-09 22:17:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:17:16,101 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-09 22:17:16,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:17:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-09 22:17:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 22:17:16,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:17:16,102 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:16,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 22:17:16,103 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:17:16,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:17:16,103 INFO L85 PathProgramCache]: Analyzing trace with hash 955104942, now seen corresponding path program 1 times [2024-11-09 22:17:16,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:17:16,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712830615] [2024-11-09 22:17:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:16,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:17:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-09 22:17:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:17:16,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:17:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712830615] [2024-11-09 22:17:16,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712830615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:17:16,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:17:16,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 22:17:16,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509935071] [2024-11-09 22:17:16,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:17:16,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 22:17:16,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:17:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 22:17:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:17:16,251 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 22:17:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:17:16,354 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2024-11-09 22:17:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 22:17:16,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-09 22:17:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:17:16,355 INFO L225 Difference]: With dead ends: 46 [2024-11-09 22:17:16,355 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 22:17:16,356 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 22:17:16,357 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:17:16,357 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 108 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:17:16,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 22:17:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-11-09 22:17:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.2) internal successors, (30), 28 states have internal predecessors, (30), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 22:17:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2024-11-09 22:17:16,371 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 17 [2024-11-09 22:17:16,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:17:16,371 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2024-11-09 22:17:16,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 22:17:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2024-11-09 22:17:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 22:17:16,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:17:16,373 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:16,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 22:17:16,373 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:17:16,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:17:16,373 INFO L85 PathProgramCache]: Analyzing trace with hash 437570850, now seen corresponding path program 1 times [2024-11-09 22:17:16,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:17:16,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349068061] [2024-11-09 22:17:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:16,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:17:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,460 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:17:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:17:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 22:17:16,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:17:16,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349068061] [2024-11-09 22:17:16,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349068061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:17:16,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:17:16,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 22:17:16,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466847482] [2024-11-09 22:17:16,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:17:16,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 22:17:16,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:17:16,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 22:17:16,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:17:16,470 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 22:17:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:17:16,526 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2024-11-09 22:17:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 22:17:16,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-09 22:17:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:17:16,528 INFO L225 Difference]: With dead ends: 53 [2024-11-09 22:17:16,528 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 22:17:16,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 22:17:16,529 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 13 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:17:16,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 196 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:17:16,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 22:17:16,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2024-11-09 22:17:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 22:17:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-11-09 22:17:16,536 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 25 [2024-11-09 22:17:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:17:16,536 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-11-09 22:17:16,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 22:17:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-11-09 22:17:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 22:17:16,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:17:16,538 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:16,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 22:17:16,538 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:17:16,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:17:16,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1276745352, now seen corresponding path program 1 times [2024-11-09 22:17:16,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:17:16,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904842553] [2024-11-09 22:17:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:16,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:17:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-09 22:17:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,611 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 22:17:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,615 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 22:17:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 22:17:16,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:17:16,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904842553] [2024-11-09 22:17:16,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904842553] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:17:16,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:17:16,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 22:17:16,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229901653] [2024-11-09 22:17:16,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:17:16,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 22:17:16,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:17:16,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 22:17:16,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 22:17:16,621 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 22:17:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:17:16,721 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2024-11-09 22:17:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 22:17:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-11-09 22:17:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:17:16,722 INFO L225 Difference]: With dead ends: 72 [2024-11-09 22:17:16,722 INFO L226 Difference]: Without dead ends: 64 [2024-11-09 22:17:16,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-09 22:17:16,723 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:17:16,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 110 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:17:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-09 22:17:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2024-11-09 22:17:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 42 states have internal predecessors, (44), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-09 22:17:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2024-11-09 22:17:16,732 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2024-11-09 22:17:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:17:16,733 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2024-11-09 22:17:16,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 22:17:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2024-11-09 22:17:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 22:17:16,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:17:16,734 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:16,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 22:17:16,734 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:17:16,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:17:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2034662816, now seen corresponding path program 1 times [2024-11-09 22:17:16,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:17:16,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236068700] [2024-11-09 22:17:16,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:16,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:17:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,803 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:17:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:17:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-09 22:17:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 22:17:16,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:17:16,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236068700] [2024-11-09 22:17:16,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236068700] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:17:16,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:17:16,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 22:17:16,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180608189] [2024-11-09 22:17:16,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:17:16,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 22:17:16,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:17:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 22:17:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 22:17:16,827 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 22:17:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:17:16,913 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2024-11-09 22:17:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 22:17:16,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-09 22:17:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:17:16,914 INFO L225 Difference]: With dead ends: 74 [2024-11-09 22:17:16,915 INFO L226 Difference]: Without dead ends: 71 [2024-11-09 22:17:16,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-09 22:17:16,916 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:17:16,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 137 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:17:16,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-09 22:17:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2024-11-09 22:17:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.119047619047619) internal successors, (47), 45 states have internal predecessors, (47), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-09 22:17:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2024-11-09 22:17:16,925 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 30 [2024-11-09 22:17:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:17:16,925 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2024-11-09 22:17:16,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 22:17:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2024-11-09 22:17:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 22:17:16,927 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:17:16,927 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:16,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 22:17:16,927 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:17:16,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:17:16,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1150883144, now seen corresponding path program 1 times [2024-11-09 22:17:16,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:17:16,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508544563] [2024-11-09 22:17:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:16,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:17:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:17,067 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:17:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:17,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:17:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:17,074 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-09 22:17:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:17,077 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-09 22:17:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:17,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-09 22:17:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:17,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 22:17:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:17,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-09 22:17:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 22:17:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:17:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508544563] [2024-11-09 22:17:17,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508544563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:17:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096895709] [2024-11-09 22:17:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:17,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:17:17,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:17:17,092 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 22:17:17,098 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 22:17:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:17,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 22:17:17,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:17:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 22:17:17,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:17:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 22:17:17,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096895709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:17:17,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:17:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 19 [2024-11-09 22:17:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975347240] [2024-11-09 22:17:17,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:17:17,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 22:17:17,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:17:17,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 22:17:17,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-11-09 22:17:17,476 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 19 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-09 22:17:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:17:17,754 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2024-11-09 22:17:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 22:17:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 53 [2024-11-09 22:17:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:17:17,757 INFO L225 Difference]: With dead ends: 104 [2024-11-09 22:17:17,757 INFO L226 Difference]: Without dead ends: 88 [2024-11-09 22:17:17,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2024-11-09 22:17:17,758 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:17:17,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 202 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:17:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-09 22:17:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-09 22:17:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 58 states have internal predecessors, (60), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-09 22:17:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2024-11-09 22:17:17,774 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 53 [2024-11-09 22:17:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:17:17,775 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2024-11-09 22:17:17,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-09 22:17:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2024-11-09 22:17:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 22:17:17,777 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:17:17,778 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:17,793 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 22:17:17,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:17:17,979 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:17:17,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:17:17,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1250919888, now seen corresponding path program 1 times [2024-11-09 22:17:17,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:17:17,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004809011] [2024-11-09 22:17:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:17,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:17:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:18,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:17:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:18,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:17:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:18,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-09 22:17:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:18,225 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-09 22:17:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:18,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-09 22:17:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:18,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-09 22:17:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:18,247 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-09 22:17:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 22:17:18,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:17:18,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004809011] [2024-11-09 22:17:18,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004809011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:17:18,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460143088] [2024-11-09 22:17:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:18,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:17:18,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:17:18,259 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 22:17:18,261 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 22:17:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:18,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 22:17:18,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:17:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 22:17:18,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:17:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 22:17:18,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460143088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:17:18,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:17:18,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-09 22:17:18,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848267959] [2024-11-09 22:17:18,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:17:18,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 22:17:18,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:17:18,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 22:17:18,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-09 22:17:18,537 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 14 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2024-11-09 22:17:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:17:18,637 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2024-11-09 22:17:18,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 22:17:18,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 55 [2024-11-09 22:17:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:17:18,639 INFO L225 Difference]: With dead ends: 95 [2024-11-09 22:17:18,639 INFO L226 Difference]: Without dead ends: 92 [2024-11-09 22:17:18,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-11-09 22:17:18,640 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:17:18,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 275 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:17:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-09 22:17:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-09 22:17:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 61 states have internal predecessors, (63), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-09 22:17:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2024-11-09 22:17:18,648 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 55 [2024-11-09 22:17:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:17:18,649 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2024-11-09 22:17:18,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2024-11-09 22:17:18,649 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2024-11-09 22:17:18,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-09 22:17:18,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:17:18,650 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:18,662 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 22:17:18,850 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,SelfDestructingSolverStorable7 [2024-11-09 22:17:18,851 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:17:18,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:17:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1891570592, now seen corresponding path program 2 times [2024-11-09 22:17:18,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:17:18,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506508406] [2024-11-09 22:17:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:18,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:17:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:17:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,010 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:17:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,013 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-09 22:17:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-09 22:17:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-09 22:17:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-09 22:17:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-09 22:17:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,021 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-09 22:17:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,023 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-11-09 22:17:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-11-09 22:17:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,041 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-09 22:17:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 48 proven. 24 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-11-09 22:17:19,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:17:19,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506508406] [2024-11-09 22:17:19,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506508406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:17:19,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550810294] [2024-11-09 22:17:19,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:17:19,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:17:19,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:17:19,045 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 22:17:19,046 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 22:17:19,087 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:17:19,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:17:19,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 22:17:19,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:17:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 22:17:19,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:17:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 22:17:19,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550810294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:17:19,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:17:19,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2024-11-09 22:17:19,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751982658] [2024-11-09 22:17:19,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:17:19,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 22:17:19,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:17:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 22:17:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-11-09 22:17:19,446 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 22 states, 20 states have (on average 3.05) internal successors, (61), 21 states have internal predecessors, (61), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-11-09 22:17:19,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:17:19,845 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2024-11-09 22:17:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 22:17:19,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 21 states have internal predecessors, (61), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 80 [2024-11-09 22:17:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:17:19,847 INFO L225 Difference]: With dead ends: 104 [2024-11-09 22:17:19,847 INFO L226 Difference]: Without dead ends: 101 [2024-11-09 22:17:19,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 22:17:19,848 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:17:19,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 220 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:17:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-09 22:17:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2024-11-09 22:17:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 64 states have internal predecessors, (66), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-09 22:17:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2024-11-09 22:17:19,858 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 80 [2024-11-09 22:17:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:17:19,858 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2024-11-09 22:17:19,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 21 states have internal predecessors, (61), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-11-09 22:17:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2024-11-09 22:17:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 22:17:19,859 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:17:19,860 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:19,878 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 22:17:20,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:17:20,064 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:17:20,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:17:20,064 INFO L85 PathProgramCache]: Analyzing trace with hash -962227016, now seen corresponding path program 2 times [2024-11-09 22:17:20,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:17:20,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141374889] [2024-11-09 22:17:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:20,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:17:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 22:17:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,289 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 22:17:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-09 22:17:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-09 22:17:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-09 22:17:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-09 22:17:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-09 22:17:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-09 22:17:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,329 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-11-09 22:17:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,331 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-11-09 22:17:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-09 22:17:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,349 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-11-09 22:17:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,352 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-11-09 22:17:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-09 22:17:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-11-09 22:17:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 56 proven. 49 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-09 22:17:20,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:17:20,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141374889] [2024-11-09 22:17:20,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141374889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:17:20,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232939978] [2024-11-09 22:17:20,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:17:20,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:17:20,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:17:20,359 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 22:17:20,364 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 22:17:20,413 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:17:20,413 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:17:20,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 22:17:20,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:17:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 64 proven. 69 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2024-11-09 22:17:20,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:17:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 71 proven. 62 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2024-11-09 22:17:20,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232939978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:17:20,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:17:20,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 20 [2024-11-09 22:17:20,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219327053] [2024-11-09 22:17:20,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:17:20,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 22:17:20,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:17:20,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 22:17:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-09 22:17:20,711 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2024-11-09 22:17:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:17:21,043 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2024-11-09 22:17:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 22:17:21,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) Word has length 103 [2024-11-09 22:17:21,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:17:21,044 INFO L225 Difference]: With dead ends: 107 [2024-11-09 22:17:21,044 INFO L226 Difference]: Without dead ends: 0 [2024-11-09 22:17:21,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 226 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2024-11-09 22:17:21,045 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 16 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:17:21,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 272 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:17:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-09 22:17:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-09 22:17:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:17:21,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-09 22:17:21,046 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2024-11-09 22:17:21,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:17:21,046 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 22:17:21,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2024-11-09 22:17:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-09 22:17:21,047 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-09 22:17:21,049 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 22:17:21,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 22:17:21,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:17:21,257 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:21,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-09 22:17:21,846 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 22:17:21,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 10:17:21 BoogieIcfgContainer [2024-11-09 22:17:21,863 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 22:17:21,864 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 22:17:21,864 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 22:17:21,864 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 22:17:21,865 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:17:15" (3/4) ... [2024-11-09 22:17:21,867 INFO L143 WitnessPrinter]: Generating witness for correct program [2024-11-09 22:17:21,871 INFO L393 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-09 22:17:21,875 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-09 22:17:21,875 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-09 22:17:21,875 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-09 22:17:21,875 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-09 22:17:22,005 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-09 22:17:22,005 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-09 22:17:22,005 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 22:17:22,005 INFO L158 Benchmark]: Toolchain (without parser) took 7093.67ms. Allocated memory was 184.5MB in the beginning and 247.5MB in the end (delta: 62.9MB). Free memory was 115.5MB in the beginning and 92.4MB in the end (delta: 23.1MB). Peak memory consumption was 87.5MB. Max. memory is 16.1GB. [2024-11-09 22:17:22,005 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory is still 77.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 22:17:22,006 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.10ms. Allocated memory is still 184.5MB. Free memory was 115.5MB in the beginning and 102.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 22:17:22,006 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.05ms. Allocated memory is still 184.5MB. Free memory was 102.9MB in the beginning and 101.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 22:17:22,006 INFO L158 Benchmark]: Boogie Preprocessor took 55.18ms. Allocated memory is still 184.5MB. Free memory was 101.3MB in the beginning and 157.2MB in the end (delta: -55.9MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2024-11-09 22:17:22,006 INFO L158 Benchmark]: IcfgBuilder took 293.16ms. Allocated memory is still 184.5MB. Free memory was 157.2MB in the beginning and 145.6MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-09 22:17:22,006 INFO L158 Benchmark]: TraceAbstraction took 6380.27ms. Allocated memory was 184.5MB in the beginning and 247.5MB in the end (delta: 62.9MB). Free memory was 144.9MB in the beginning and 96.6MB in the end (delta: 48.4MB). Peak memory consumption was 112.0MB. Max. memory is 16.1GB. [2024-11-09 22:17:22,006 INFO L158 Benchmark]: Witness Printer took 141.00ms. Allocated memory is still 247.5MB. Free memory was 96.6MB in the beginning and 92.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 22:17:22,008 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory is still 77.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 193.10ms. Allocated memory is still 184.5MB. Free memory was 115.5MB in the beginning and 102.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.05ms. Allocated memory is still 184.5MB. Free memory was 102.9MB in the beginning and 101.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.18ms. Allocated memory is still 184.5MB. Free memory was 101.3MB in the beginning and 157.2MB in the end (delta: -55.9MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. * IcfgBuilder took 293.16ms. Allocated memory is still 184.5MB. Free memory was 157.2MB in the beginning and 145.6MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6380.27ms. Allocated memory was 184.5MB in the beginning and 247.5MB in the end (delta: 62.9MB). Free memory was 144.9MB in the beginning and 96.6MB in the end (delta: 48.4MB). Peak memory consumption was 112.0MB. Max. memory is 16.1GB. * Witness Printer took 141.00ms. Allocated memory is still 247.5MB. Free memory was 96.6MB in the beginning and 92.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.7s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 312 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 258 mSDsluCounter, 1644 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1338 mSDsCounter, 196 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1082 IncrementalHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 196 mSolverCounterUnsat, 306 mSDtfsCounter, 1082 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 788 GetRequests, 642 SyntacticMatches, 17 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=9, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 705 NumberOfCodeBlocks, 705 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 978 ConstructedInterpolants, 0 QuantifiedInterpolants, 3129 SizeOfPredicates, 14 NumberOfNonLiveVariables, 622 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 2594/2923 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Location Invariant Derived location invariant: null - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: (cond != 0) RESULT: Ultimate proved your program to be correct! [2024-11-09 22:17:22,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE