./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.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-crafted/simple_array_index_value_1-1.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 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 22:15:37,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 22:15:37,144 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 22:15:37,156 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 22:15:37,156 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 22:15:37,180 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 22:15:37,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 22:15:37,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 22:15:37,182 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 22:15:37,182 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 22:15:37,183 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 22:15:37,183 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 22:15:37,184 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 22:15:37,184 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 22:15:37,186 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 22:15:37,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 22:15:37,186 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 22:15:37,187 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 22:15:37,187 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 22:15:37,187 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 22:15:37,191 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 22:15:37,192 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 22:15:37,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 22:15:37,192 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 22:15:37,192 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 22:15:37,192 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 22:15:37,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 22:15:37,193 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 22:15:37,193 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 22:15:37,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 22:15:37,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 22:15:37,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 22:15:37,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:15:37,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 22:15:37,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 22:15:37,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 22:15:37,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 22:15:37,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 22:15:37,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 22:15:37,195 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 22:15:37,195 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 22:15:37,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 22:15:37,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 [2024-11-09 22:15:37,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 22:15:37,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 22:15:37,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 22:15:37,465 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 22:15:37,466 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 22:15:37,467 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-11-09 22:15:38,883 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 22:15:39,068 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 22:15:39,068 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-11-09 22:15:39,074 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28916c278/83746b45fd6f4c1c87ab83f1c355b5f5/FLAG4136e71bf [2024-11-09 22:15:39,441 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28916c278/83746b45fd6f4c1c87ab83f1c355b5f5 [2024-11-09 22:15:39,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 22:15:39,445 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 22:15:39,446 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 22:15:39,446 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 22:15:39,452 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 22:15:39,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575c07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39, skipping insertion in model container [2024-11-09 22:15:39,454 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,481 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 22:15:39,678 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-crafted/simple_array_index_value_1-1.i[834,847] [2024-11-09 22:15:39,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:15:39,708 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 22:15:39,720 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-crafted/simple_array_index_value_1-1.i[834,847] [2024-11-09 22:15:39,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:15:39,744 INFO L204 MainTranslator]: Completed translation [2024-11-09 22:15:39,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39 WrapperNode [2024-11-09 22:15:39,748 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 22:15:39,749 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 22:15:39,749 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 22:15:39,750 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 22:15:39,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,763 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,776 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2024-11-09 22:15:39,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 22:15:39,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 22:15:39,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 22:15:39,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 22:15:39,786 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,788 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,799 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-09 22:15:39,799 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,800 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,804 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,804 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,806 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,807 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,809 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 22:15:39,810 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 22:15:39,810 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 22:15:39,810 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 22:15:39,812 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (1/1) ... [2024-11-09 22:15:39,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:15:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:15:39,847 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 22:15:39,854 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 22:15:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 22:15:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 22:15:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 22:15:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 22:15:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 22:15:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 22:15:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 22:15:39,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 22:15:39,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 22:15:39,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 22:15:39,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 22:15:39,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 22:15:39,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 22:15:39,985 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 22:15:39,987 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 22:15:40,131 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-09 22:15:40,131 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 22:15:40,143 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 22:15:40,144 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 22:15:40,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:15:40 BoogieIcfgContainer [2024-11-09 22:15:40,144 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 22:15:40,146 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 22:15:40,146 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 22:15:40,149 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 22:15:40,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:15:39" (1/3) ... [2024-11-09 22:15:40,150 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d31f97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:15:40, skipping insertion in model container [2024-11-09 22:15:40,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:15:39" (2/3) ... [2024-11-09 22:15:40,150 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d31f97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:15:40, skipping insertion in model container [2024-11-09 22:15:40,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:15:40" (3/3) ... [2024-11-09 22:15:40,152 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2024-11-09 22:15:40,167 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 22:15:40,167 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 22:15:40,232 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 22:15:40,238 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;@5b35b09c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 22:15:40,238 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 22:15:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 22:15:40,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 22:15:40,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:15:40,248 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:15:40,248 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:15:40,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:15:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1825996784, now seen corresponding path program 1 times [2024-11-09 22:15:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:15:40,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345092215] [2024-11-09 22:15:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:15:40,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:15:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:40,383 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 22:15:40,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:15:40,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345092215] [2024-11-09 22:15:40,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345092215] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:15:40,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:15:40,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 22:15:40,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776792502] [2024-11-09 22:15:40,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:15:40,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 22:15:40,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:15:40,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 22:15:40,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 22:15:40,411 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:15:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:15:40,428 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2024-11-09 22:15:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 22:15:40,429 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:15:40,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:15:40,434 INFO L225 Difference]: With dead ends: 45 [2024-11-09 22:15:40,435 INFO L226 Difference]: Without dead ends: 20 [2024-11-09 22:15:40,437 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 22:15:40,440 INFO L432 NwaCegarLoop]: 27 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, 27 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 22:15:40,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:15:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-09 22:15:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-09 22:15:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 22:15:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-09 22:15:40,469 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2024-11-09 22:15:40,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:15:40,470 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-09 22:15:40,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 22:15:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-09 22:15:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 22:15:40,471 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:15:40,472 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:15:40,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 22:15:40,472 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:15:40,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:15:40,473 INFO L85 PathProgramCache]: Analyzing trace with hash -296747962, now seen corresponding path program 1 times [2024-11-09 22:15:40,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:15:40,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520198760] [2024-11-09 22:15:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:15:40,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:15:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:40,588 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 22:15:40,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:15:40,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520198760] [2024-11-09 22:15:40,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520198760] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:15:40,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:15:40,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 22:15:40,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187722835] [2024-11-09 22:15:40,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:15:40,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 22:15:40,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:15:40,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 22:15:40,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 22:15:40,592 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 22:15:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:15:40,633 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-11-09 22:15:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 22:15:40,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2024-11-09 22:15:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:15:40,635 INFO L225 Difference]: With dead ends: 44 [2024-11-09 22:15:40,635 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 22:15:40,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 22:15:40,638 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:15:40,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:15:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 22:15:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2024-11-09 22:15:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 22:15:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-09 22:15:40,652 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2024-11-09 22:15:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:15:40,652 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-09 22:15:40,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 22:15:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-09 22:15:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 22:15:40,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:15:40,655 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:15:40,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 22:15:40,655 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:15:40,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:15:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash 263816359, now seen corresponding path program 1 times [2024-11-09 22:15:40,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:15:40,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956467997] [2024-11-09 22:15:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:15:40,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:15:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:15:40,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:15:40,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956467997] [2024-11-09 22:15:40,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956467997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:15:40,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023450828] [2024-11-09 22:15:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:15:40,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:15:40,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:15:40,955 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 22:15:40,956 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 22:15:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:41,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 22:15:41,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:15:41,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 22:15:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:15:41,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:15:41,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-09 22:15:41,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2024-11-09 22:15:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:15:41,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023450828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:15:41,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:15:41,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 9] total 14 [2024-11-09 22:15:41,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997670379] [2024-11-09 22:15:41,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:15:41,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 22:15:41,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:15:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 22:15:41,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-09 22:15:41,591 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:15:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:15:41,822 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2024-11-09 22:15:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 22:15:41,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-09 22:15:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:15:41,824 INFO L225 Difference]: With dead ends: 60 [2024-11-09 22:15:41,824 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 22:15:41,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-09 22:15:41,826 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:15:41,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 109 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:15:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 22:15:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-11-09 22:15:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 22:15:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-11-09 22:15:41,840 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 15 [2024-11-09 22:15:41,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:15:41,841 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-11-09 22:15:41,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:15:41,841 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-11-09 22:15:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 22:15:41,843 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:15:41,843 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:15:41,861 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 22:15:42,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:15:42,048 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:15:42,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:15:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1929875072, now seen corresponding path program 1 times [2024-11-09 22:15:42,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:15:42,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743843409] [2024-11-09 22:15:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:15:42,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:15:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:42,241 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 22:15:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 22:15:42,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:15:42,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743843409] [2024-11-09 22:15:42,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743843409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:15:42,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147042474] [2024-11-09 22:15:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:15:42,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:15:42,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:15:42,248 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 22:15:42,250 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 22:15:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:42,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 22:15:42,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:15:42,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 22:15:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:15:42,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:15:46,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-11-09 22:15:46,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 22:15:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:15:46,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147042474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:15:46,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:15:46,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 19 [2024-11-09 22:15:46,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95477904] [2024-11-09 22:15:46,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:15:46,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 22:15:46,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:15:46,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 22:15:46,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=276, Unknown=1, NotChecked=0, Total=342 [2024-11-09 22:15:46,922 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 22:15:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:15:47,836 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2024-11-09 22:15:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 22:15:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2024-11-09 22:15:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:15:47,838 INFO L225 Difference]: With dead ends: 88 [2024-11-09 22:15:47,838 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 22:15:47,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=159, Invalid=596, Unknown=1, NotChecked=0, Total=756 [2024-11-09 22:15:47,839 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 22:15:47,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 181 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 22:15:47,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 22:15:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2024-11-09 22:15:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 22:15:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-09 22:15:47,853 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 27 [2024-11-09 22:15:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:15:47,854 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-09 22:15:47,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 22:15:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-09 22:15:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 22:15:47,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:15:47,856 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:15:47,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 22:15:48,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-09 22:15:48,061 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:15:48,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:15:48,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1331861913, now seen corresponding path program 1 times [2024-11-09 22:15:48,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:15:48,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940361131] [2024-11-09 22:15:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:15:48,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:15:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:48,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-09 22:15:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:48,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:15:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 22:15:48,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:15:48,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940361131] [2024-11-09 22:15:48,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940361131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:15:48,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823638403] [2024-11-09 22:15:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:15:48,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:15:48,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:15:48,244 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 22:15:48,245 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 22:15:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:48,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 22:15:48,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:15:48,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 22:15:48,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 22:15:48,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 22:15:48,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-11-09 22:15:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 22:15:48,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:15:50,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 96 [2024-11-09 22:15:50,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 22:15:50,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 526 treesize of output 516 [2024-11-09 22:15:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 22:15:50,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823638403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:15:50,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:15:50,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 18] total 33 [2024-11-09 22:15:50,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924637075] [2024-11-09 22:15:50,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:15:50,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 22:15:50,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:15:50,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 22:15:50,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 22:15:50,994 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 33 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 32 states have internal predecessors, (80), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 22:15:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:15:53,630 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2024-11-09 22:15:53,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 22:15:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 32 states have internal predecessors, (80), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2024-11-09 22:15:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:15:53,632 INFO L225 Difference]: With dead ends: 136 [2024-11-09 22:15:53,632 INFO L226 Difference]: Without dead ends: 98 [2024-11-09 22:15:53,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=570, Invalid=2186, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 22:15:53,634 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 22:15:53,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 222 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 22:15:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-09 22:15:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2024-11-09 22:15:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 67 states have internal predecessors, (72), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 22:15:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2024-11-09 22:15:53,651 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 39 [2024-11-09 22:15:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:15:53,652 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2024-11-09 22:15:53,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 32 states have internal predecessors, (80), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 22:15:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2024-11-09 22:15:53,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 22:15:53,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:15:53,653 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:15:53,669 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 22:15:53,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:15:53,858 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:15:53,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:15:53,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1617112306, now seen corresponding path program 2 times [2024-11-09 22:15:53,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:15:53,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877825548] [2024-11-09 22:15:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:15:53,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:15:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:54,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:15:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:54,011 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-09 22:15:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:54,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 22:15:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:15:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 22:15:54,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:15:54,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877825548] [2024-11-09 22:15:54,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877825548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:15:54,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825562059] [2024-11-09 22:15:54,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:15:54,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:15:54,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:15:54,020 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 22:15:54,021 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 22:15:54,083 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:15:54,083 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:15:54,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 22:15:54,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:15:54,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 22:15:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 22:15:54,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:15:59,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-11-09 22:15:59,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 22:15:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 22:15:59,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825562059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:15:59,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:15:59,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 15] total 27 [2024-11-09 22:15:59,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404447898] [2024-11-09 22:15:59,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:15:59,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 22:15:59,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:15:59,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 22:15:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=586, Unknown=1, NotChecked=0, Total=702 [2024-11-09 22:15:59,222 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 27 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 22:16:03,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 22:16:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:16:07,895 INFO L93 Difference]: Finished difference Result 175 states and 201 transitions. [2024-11-09 22:16:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 22:16:07,896 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 51 [2024-11-09 22:16:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:16:07,897 INFO L225 Difference]: With dead ends: 175 [2024-11-09 22:16:07,897 INFO L226 Difference]: Without dead ends: 108 [2024-11-09 22:16:07,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=387, Invalid=1682, Unknown=1, NotChecked=0, Total=2070 [2024-11-09 22:16:07,899 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-09 22:16:07,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 357 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 431 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-11-09 22:16:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-09 22:16:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2024-11-09 22:16:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 73 states have (on average 1.082191780821918) internal successors, (79), 74 states have internal predecessors, (79), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 22:16:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2024-11-09 22:16:07,919 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 51 [2024-11-09 22:16:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:16:07,919 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2024-11-09 22:16:07,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 22:16:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2024-11-09 22:16:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 22:16:07,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:16:07,923 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:16:07,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 22:16:08,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:16:08,123 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:16:08,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:16:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2055906421, now seen corresponding path program 3 times [2024-11-09 22:16:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:16:08,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427431548] [2024-11-09 22:16:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:16:08,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:16:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:16:08,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 22:16:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:16:08,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-09 22:16:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:16:08,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-09 22:16:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:16:08,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-11-09 22:16:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:16:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 22:16:08,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:16:08,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427431548] [2024-11-09 22:16:08,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427431548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:16:08,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400274944] [2024-11-09 22:16:08,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 22:16:08,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:16:08,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:16:08,360 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:16:08,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 22:16:08,568 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 22:16:08,568 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:16:08,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-09 22:16:08,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:16:08,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 22:16:08,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-09 22:16:08,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 22:16:08,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2024-11-09 22:16:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 22:16:09,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:16:30,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 148 [2024-11-09 22:16:30,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 22:16:30,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2121 treesize of output 2073 [2024-11-09 22:16:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 21 proven. 74 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 22:16:31,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400274944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:16:31,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:16:31,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 21, 26] total 48 [2024-11-09 22:16:31,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642957582] [2024-11-09 22:16:31,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:16:31,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 22:16:31,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:16:31,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 22:16:31,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1921, Unknown=4, NotChecked=0, Total=2256 [2024-11-09 22:16:31,024 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 48 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 46 states have internal predecessors, (113), 11 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-09 22:16:44,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-09 22:16:52,874 WARN L286 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 83 DAG size of output: 77 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 22:17:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:17:02,006 INFO L93 Difference]: Finished difference Result 220 states and 249 transitions. [2024-11-09 22:17:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 22:17:02,007 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 46 states have internal predecessors, (113), 11 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 63 [2024-11-09 22:17:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:17:02,009 INFO L225 Difference]: With dead ends: 220 [2024-11-09 22:17:02,010 INFO L226 Difference]: Without dead ends: 146 [2024-11-09 22:17:02,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=1009, Invalid=4839, Unknown=4, NotChecked=0, Total=5852 [2024-11-09 22:17:02,012 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 149 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 110 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-09 22:17:02,012 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 514 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 758 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2024-11-09 22:17:02,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-09 22:17:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 135. [2024-11-09 22:17:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 111 states have (on average 1.0990990990990992) internal successors, (122), 113 states have internal predecessors, (122), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-09 22:17:02,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 152 transitions. [2024-11-09 22:17:02,054 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 152 transitions. Word has length 63 [2024-11-09 22:17:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:17:02,054 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 152 transitions. [2024-11-09 22:17:02,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 46 states have internal predecessors, (113), 11 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-09 22:17:02,055 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 152 transitions. [2024-11-09 22:17:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 22:17:02,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:17:02,056 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:17:02,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 22:17:02,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:17:02,257 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:17:02,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:17:02,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1892439396, now seen corresponding path program 4 times [2024-11-09 22:17:02,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:17:02,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329816359] [2024-11-09 22:17:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:17:02,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:17:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:02,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-09 22:17:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:02,484 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-09 22:17:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:02,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-09 22:17:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:02,489 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-09 22:17:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:02,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-09 22:17:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:17:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-09 22:17:02,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:17:02,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329816359] [2024-11-09 22:17:02,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329816359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:17:02,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868922164] [2024-11-09 22:17:02,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 22:17:02,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:17:02,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:17:02,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:17:02,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 22:17:02,570 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 22:17:02,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:17:02,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 22:17:02,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:17:02,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 22:17:02,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-09 22:17:02,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 22:17:02,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2024-11-09 22:17:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 18 proven. 117 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 22:17:03,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:17:07,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 147 [2024-11-09 22:17:07,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 22:17:07,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1454 treesize of output 1422 [2024-11-09 22:17:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 29 proven. 109 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 22:17:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868922164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:17:07,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:17:07,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23, 28] total 52 [2024-11-09 22:17:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285164337] [2024-11-09 22:17:07,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:17:07,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-09 22:17:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:17:07,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-09 22:17:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 22:17:07,633 INFO L87 Difference]: Start difference. First operand 135 states and 152 transitions. Second operand has 52 states, 46 states have (on average 2.760869565217391) internal successors, (127), 50 states have internal predecessors, (127), 13 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12)