./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_01.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_two_index_01.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 49688e6ac5964d079e81b93cbef6c2e6f5f14699441dc6a4423fa686d49b3f7f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 20:39:12,080 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 20:39:12,158 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 20:39:12,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 20:39:12,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 20:39:12,191 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 20:39:12,192 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 20:39:12,192 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 20:39:12,193 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 20:39:12,193 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 20:39:12,194 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 20:39:12,194 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 20:39:12,195 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 20:39:12,195 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 20:39:12,196 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 20:39:12,196 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 20:39:12,196 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 20:39:12,197 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 20:39:12,197 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 20:39:12,199 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 20:39:12,199 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 20:39:12,200 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 20:39:12,204 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 20:39:12,205 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 20:39:12,205 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 20:39:12,205 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 20:39:12,205 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 20:39:12,205 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 20:39:12,206 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 20:39:12,206 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 20:39:12,206 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 20:39:12,206 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 20:39:12,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:39:12,207 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 20:39:12,208 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 20:39:12,208 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 20:39:12,209 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 20:39:12,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 20:39:12,210 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 20:39:12,210 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 20:39:12,210 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 20:39:12,211 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 20:39:12,211 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49688e6ac5964d079e81b93cbef6c2e6f5f14699441dc6a4423fa686d49b3f7f [2024-11-21 20:39:12,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 20:39:12,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 20:39:12,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 20:39:12,511 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 20:39:12,512 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 20:39:12,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_01.i [2024-11-21 20:39:13,961 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 20:39:14,125 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 20:39:14,126 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_01.i [2024-11-21 20:39:14,132 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b894d2c1/8165bbd8b88b488abdc3ef142623c8aa/FLAG4df7e2b0e [2024-11-21 20:39:14,530 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b894d2c1/8165bbd8b88b488abdc3ef142623c8aa [2024-11-21 20:39:14,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 20:39:14,533 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 20:39:14,534 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 20:39:14,534 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 20:39:14,539 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 20:39:14,540 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,541 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f5bc20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14, skipping insertion in model container [2024-11-21 20:39:14,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,563 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 20:39:14,737 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_01.i[814,827] [2024-11-21 20:39:14,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:39:14,760 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 20:39:14,772 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_01.i[814,827] [2024-11-21 20:39:14,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:39:14,797 INFO L204 MainTranslator]: Completed translation [2024-11-21 20:39:14,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14 WrapperNode [2024-11-21 20:39:14,798 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 20:39:14,799 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 20:39:14,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 20:39:14,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 20:39:14,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,815 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,830 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2024-11-21 20:39:14,831 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 20:39:14,832 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 20:39:14,832 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 20:39:14,832 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 20:39:14,839 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,841 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,852 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 3, 2]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-21 20:39:14,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,858 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,861 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,862 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,863 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,865 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 20:39:14,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 20:39:14,866 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 20:39:14,866 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 20:39:14,868 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (1/1) ... [2024-11-21 20:39:14,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:39:14,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:39:14,905 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) [2024-11-21 20:39:14,909 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 [2024-11-21 20:39:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 20:39:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 20:39:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-21 20:39:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-21 20:39:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-21 20:39:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-21 20:39:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-21 20:39:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-21 20:39:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 20:39:14,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 20:39:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-21 20:39:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-21 20:39:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-21 20:39:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-21 20:39:15,018 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 20:39:15,020 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 20:39:15,137 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-21 20:39:15,137 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 20:39:15,150 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 20:39:15,153 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-21 20:39:15,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:39:15 BoogieIcfgContainer [2024-11-21 20:39:15,154 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 20:39:15,156 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 20:39:15,156 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 20:39:15,159 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 20:39:15,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:39:14" (1/3) ... [2024-11-21 20:39:15,160 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3ff7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:39:15, skipping insertion in model container [2024-11-21 20:39:15,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:39:14" (2/3) ... [2024-11-21 20:39:15,161 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3ff7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:39:15, skipping insertion in model container [2024-11-21 20:39:15,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:39:15" (3/3) ... [2024-11-21 20:39:15,162 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_01.i [2024-11-21 20:39:15,178 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 20:39:15,178 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 20:39:15,231 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 20:39:15,237 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;@5a4c3ba7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 20:39:15,238 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 20:39:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:15,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-21 20:39:15,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:39:15,248 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:39:15,249 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:39:15,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:39:15,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2024-11-21 20:39:15,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:39:15,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007986525] [2024-11-21 20:39:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:39:15,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:39:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:39:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:39:15,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:39:15,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007986525] [2024-11-21 20:39:15,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007986525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:39:15,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:39:15,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-21 20:39:15,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58487219] [2024-11-21 20:39:15,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:39:15,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-21 20:39:15,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:39:15,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-21 20:39:15,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 20:39:15,560 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:39:15,675 INFO L93 Difference]: Finished difference Result 34 states and 51 transitions. [2024-11-21 20:39:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-21 20:39:15,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-21 20:39:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:39:15,689 INFO L225 Difference]: With dead ends: 34 [2024-11-21 20:39:15,689 INFO L226 Difference]: Without dead ends: 18 [2024-11-21 20:39:15,693 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 [2024-11-21 20:39:15,696 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:39:15,699 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:39:15,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-21 20:39:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2024-11-21 20:39:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-11-21 20:39:15,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2024-11-21 20:39:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:39:15,732 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-11-21 20:39:15,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:15,734 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-11-21 20:39:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-21 20:39:15,735 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:39:15,735 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:39:15,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-21 20:39:15,736 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:39:15,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:39:15,737 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2024-11-21 20:39:15,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:39:15,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450611667] [2024-11-21 20:39:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:39:15,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:39:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:39:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:39:15,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:39:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450611667] [2024-11-21 20:39:15,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450611667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:39:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618852243] [2024-11-21 20:39:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:39:15,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:39:15,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:39:15,888 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) [2024-11-21 20:39:15,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-21 20:39:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:39:15,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-21 20:39:15,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:39:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:39:16,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:39:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:39:16,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618852243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:39:16,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:39:16,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-21 20:39:16,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352751025] [2024-11-21 20:39:16,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:39:16,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-21 20:39:16,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:39:16,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-21 20:39:16,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-21 20:39:16,049 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:39:16,131 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2024-11-21 20:39:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-21 20:39:16,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-21 20:39:16,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:39:16,133 INFO L225 Difference]: With dead ends: 44 [2024-11-21 20:39:16,134 INFO L226 Difference]: Without dead ends: 35 [2024-11-21 20:39:16,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-21 20:39:16,136 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:39:16,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:39:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-21 20:39:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2024-11-21 20:39:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-21 20:39:16,146 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2024-11-21 20:39:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:39:16,147 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-21 20:39:16,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-21 20:39:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-21 20:39:16,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:39:16,150 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:39:16,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-21 20:39:16,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:39:16,352 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:39:16,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:39:16,353 INFO L85 PathProgramCache]: Analyzing trace with hash -57020904, now seen corresponding path program 2 times [2024-11-21 20:39:16,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:39:16,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025754089] [2024-11-21 20:39:16,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:39:16,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:39:16,422 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:39:16,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:39:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-21 20:39:16,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:39:16,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025754089] [2024-11-21 20:39:16,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025754089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:39:16,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451711148] [2024-11-21 20:39:16,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:39:16,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:39:16,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:39:16,569 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) [2024-11-21 20:39:16,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-21 20:39:16,642 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:39:16,642 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:39:16,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 20:39:16,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:39:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-21 20:39:16,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:39:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-21 20:39:16,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451711148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:39:16,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:39:16,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-21 20:39:16,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289476586] [2024-11-21 20:39:16,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:39:16,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-21 20:39:16,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:39:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-21 20:39:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-21 20:39:16,753 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:16,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:39:16,876 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2024-11-21 20:39:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-21 20:39:16,877 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-21 20:39:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:39:16,878 INFO L225 Difference]: With dead ends: 89 [2024-11-21 20:39:16,879 INFO L226 Difference]: Without dead ends: 77 [2024-11-21 20:39:16,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-21 20:39:16,881 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:39:16,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 40 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:39:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-21 20:39:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 31. [2024-11-21 20:39:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-11-21 20:39:16,892 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2024-11-21 20:39:16,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:39:16,893 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-11-21 20:39:16,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:16,893 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-11-21 20:39:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-21 20:39:16,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:39:16,895 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:39:16,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-21 20:39:17,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-21 20:39:17,097 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:39:17,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:39:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash 163360248, now seen corresponding path program 3 times [2024-11-21 20:39:17,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:39:17,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562038193] [2024-11-21 20:39:17,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:39:17,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:39:17,206 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 20:39:17,207 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:39:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-21 20:39:17,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:39:17,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562038193] [2024-11-21 20:39:17,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562038193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:39:17,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872645608] [2024-11-21 20:39:17,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:39:17,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:39:17,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:39:17,508 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) [2024-11-21 20:39:17,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-21 20:39:17,781 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 20:39:17,782 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:39:17,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-21 20:39:17,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:39:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-21 20:39:17,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:39:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-21 20:39:18,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872645608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:39:18,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:39:18,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 26 [2024-11-21 20:39:18,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710383210] [2024-11-21 20:39:18,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:39:18,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-21 20:39:18,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:39:18,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-21 20:39:18,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2024-11-21 20:39:18,103 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:39:18,352 INFO L93 Difference]: Finished difference Result 179 states and 206 transitions. [2024-11-21 20:39:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-21 20:39:18,353 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-21 20:39:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:39:18,354 INFO L225 Difference]: With dead ends: 179 [2024-11-21 20:39:18,354 INFO L226 Difference]: Without dead ends: 161 [2024-11-21 20:39:18,355 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2024-11-21 20:39:18,356 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 249 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 20:39:18,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 75 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 20:39:18,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-21 20:39:18,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 55. [2024-11-21 20:39:18,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2024-11-21 20:39:18,373 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 29 [2024-11-21 20:39:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:39:18,373 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2024-11-21 20:39:18,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2024-11-21 20:39:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-21 20:39:18,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:39:18,376 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:39:18,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-21 20:39:18,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:39:18,580 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:39:18,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:39:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1745446328, now seen corresponding path program 4 times [2024-11-21 20:39:18,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:39:18,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722045979] [2024-11-21 20:39:18,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:39:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:39:18,655 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:39:18,656 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:39:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-21 20:39:19,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:39:19,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722045979] [2024-11-21 20:39:19,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722045979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:39:19,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707965553] [2024-11-21 20:39:19,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:39:19,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:39:19,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:39:19,376 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) [2024-11-21 20:39:19,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-21 20:39:19,520 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:39:19,520 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:39:19,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-21 20:39:19,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:39:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-21 20:39:19,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:39:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-21 20:39:20,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707965553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:39:20,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:39:20,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-21 20:39:20,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208825162] [2024-11-21 20:39:20,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:39:20,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-21 20:39:20,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:39:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-21 20:39:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-21 20:39:20,382 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:20,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:39:20,971 INFO L93 Difference]: Finished difference Result 359 states and 410 transitions. [2024-11-21 20:39:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-21 20:39:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-21 20:39:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:39:20,977 INFO L225 Difference]: With dead ends: 359 [2024-11-21 20:39:20,979 INFO L226 Difference]: Without dead ends: 329 [2024-11-21 20:39:20,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-21 20:39:20,981 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 636 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 20:39:20,981 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 150 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 20:39:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-11-21 20:39:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 103. [2024-11-21 20:39:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2024-11-21 20:39:21,004 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 53 [2024-11-21 20:39:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:39:21,004 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2024-11-21 20:39:21,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:39:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2024-11-21 20:39:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-21 20:39:21,009 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:39:21,009 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:39:21,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-21 20:39:21,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:39:21,210 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:39:21,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:39:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1914156344, now seen corresponding path program 5 times [2024-11-21 20:39:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:39:21,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329422234] [2024-11-21 20:39:21,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:39:21,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:39:21,626 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-11-21 20:39:21,626 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:39:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2024-11-21 20:39:23,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:39:23,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329422234] [2024-11-21 20:39:23,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329422234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:39:23,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43431402] [2024-11-21 20:39:23,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:39:23,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:39:23,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:39:23,993 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) [2024-11-21 20:39:23,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process