./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn2.c --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-fpi/eqn2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c5e7a5b5183897e81f3d009c328161669eb0a8a3042b507053cc41bb75da51c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 21:05:11,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 21:05:11,462 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 21:05:11,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 21:05:11,467 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 21:05:11,499 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 21:05:11,499 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 21:05:11,499 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 21:05:11,500 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 21:05:11,502 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 21:05:11,506 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 21:05:11,506 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 21:05:11,507 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 21:05:11,507 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 21:05:11,507 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 21:05:11,507 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 21:05:11,507 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 21:05:11,508 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 21:05:11,508 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 21:05:11,508 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 21:05:11,508 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 21:05:11,509 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 21:05:11,511 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 21:05:11,512 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 21:05:11,512 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 21:05:11,512 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 21:05:11,513 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 21:05:11,513 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 21:05:11,513 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 21:05:11,514 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 21:05:11,514 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 21:05:11,515 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 21:05:11,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:05:11,515 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 21:05:11,516 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 21:05:11,516 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 21:05:11,516 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 21:05:11,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 21:05:11,516 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 21:05:11,517 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 21:05:11,517 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 21:05:11,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 21:05:11,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c5e7a5b5183897e81f3d009c328161669eb0a8a3042b507053cc41bb75da51c [2024-11-21 21:05:11,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 21:05:11,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 21:05:11,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 21:05:11,812 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 21:05:11,814 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 21:05:11,816 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn2.c [2024-11-21 21:05:13,192 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 21:05:13,363 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 21:05:13,364 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2.c [2024-11-21 21:05:13,370 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27cedd3eb/e7cc71f201fb46138136d0d6b74596be/FLAGfe8c9cf4b [2024-11-21 21:05:13,381 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27cedd3eb/e7cc71f201fb46138136d0d6b74596be [2024-11-21 21:05:13,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 21:05:13,384 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 21:05:13,385 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 21:05:13,385 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 21:05:13,390 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 21:05:13,390 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,391 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4251628c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13, skipping insertion in model container [2024-11-21 21:05:13,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,412 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 21:05:13,577 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2.c[587,600] [2024-11-21 21:05:13,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:05:13,613 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 21:05:13,626 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2.c[587,600] [2024-11-21 21:05:13,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:05:13,661 INFO L204 MainTranslator]: Completed translation [2024-11-21 21:05:13,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13 WrapperNode [2024-11-21 21:05:13,662 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 21:05:13,663 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 21:05:13,664 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 21:05:13,664 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 21:05:13,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,677 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,698 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2024-11-21 21:05:13,702 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 21:05:13,702 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 21:05:13,703 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 21:05:13,703 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 21:05:13,713 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,715 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,727 INFO L175 MemorySlicer]: Split 17 memory accesses to 4 slices as follows [2, 7, 4, 4]. 41 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 2, 2]. [2024-11-21 21:05:13,728 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,728 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,733 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,735 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,736 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,737 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,739 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 21:05:13,740 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 21:05:13,740 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 21:05:13,740 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 21:05:13,741 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (1/1) ... [2024-11-21 21:05:13,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:05:13,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:05:13,776 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 21:05:13,783 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 21:05:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 21:05:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 21:05:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-21 21:05:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-21 21:05:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-21 21:05:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-21 21:05:13,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-21 21:05:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-21 21:05:13,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-21 21:05:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-21 21:05:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 21:05:13,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 21:05:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-21 21:05:13,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-21 21:05:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-21 21:05:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-21 21:05:13,926 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 21:05:13,928 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 21:05:14,176 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-21 21:05:14,178 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 21:05:14,193 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 21:05:14,194 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-21 21:05:14,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:14 BoogieIcfgContainer [2024-11-21 21:05:14,194 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 21:05:14,196 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 21:05:14,196 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 21:05:14,200 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 21:05:14,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:05:13" (1/3) ... [2024-11-21 21:05:14,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afd75ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:14, skipping insertion in model container [2024-11-21 21:05:14,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:13" (2/3) ... [2024-11-21 21:05:14,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afd75ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:14, skipping insertion in model container [2024-11-21 21:05:14,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:14" (3/3) ... [2024-11-21 21:05:14,203 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn2.c [2024-11-21 21:05:14,217 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 21:05:14,218 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 21:05:14,277 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 21:05:14,285 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;@3c222089, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 21:05:14,285 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 21:05:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 21:05:14,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-21 21:05:14,295 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:05:14,295 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:05:14,296 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:05:14,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:05:14,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2024-11-21 21:05:14,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:05:14,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554632836] [2024-11-21 21:05:14,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:05:14,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:05:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:05:14,475 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 21:05:14,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:05:14,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554632836] [2024-11-21 21:05:14,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554632836] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:05:14,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:05:14,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-21 21:05:14,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89840367] [2024-11-21 21:05:14,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:05:14,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-21 21:05:14,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:05:14,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-21 21:05:14,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-21 21:05:14,501 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 21:05:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:05:14,512 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2024-11-21 21:05:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-21 21:05:14,514 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2024-11-21 21:05:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:05:14,520 INFO L225 Difference]: With dead ends: 38 [2024-11-21 21:05:14,521 INFO L226 Difference]: Without dead ends: 17 [2024-11-21 21:05:14,523 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 [2024-11-21 21:05:14,526 INFO L432 NwaCegarLoop]: 24 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, 24 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 [2024-11-21 21:05:14,527 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:05:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-21 21:05:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-21 21:05:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 21:05:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-21 21:05:14,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2024-11-21 21:05:14,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:05:14,553 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-21 21:05:14,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 21:05:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-21 21:05:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-21 21:05:14,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:05:14,556 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:05:14,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-21 21:05:14,556 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:05:14,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:05:14,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2024-11-21 21:05:14,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:05:14,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399696163] [2024-11-21 21:05:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:05:14,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:05:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-21 21:05:14,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730915091] [2024-11-21 21:05:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:05:14,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:05:14,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:05:14,625 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 21:05:14,627 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 21:05:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:05:14,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-21 21:05:14,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:05:14,793 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 [2024-11-21 21:05:14,879 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 21:05:14,879 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:05:14,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:05:14,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399696163] [2024-11-21 21:05:14,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:05:14,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730915091] [2024-11-21 21:05:14,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730915091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:05:14,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:05:14,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-21 21:05:14,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551771094] [2024-11-21 21:05:14,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:05:14,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-21 21:05:14,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:05:14,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-21 21:05:14,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-21 21:05:14,884 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 21:05:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:05:14,976 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2024-11-21 21:05:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-21 21:05:14,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2024-11-21 21:05:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:05:14,977 INFO L225 Difference]: With dead ends: 31 [2024-11-21 21:05:14,978 INFO L226 Difference]: Without dead ends: 29 [2024-11-21 21:05:14,978 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-21 21:05:14,979 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:05:14,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:05:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-21 21:05:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2024-11-21 21:05:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 21:05:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-21 21:05:14,991 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2024-11-21 21:05:14,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:05:14,992 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-21 21:05:14,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 21:05:14,992 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-21 21:05:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-21 21:05:14,995 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:05:14,995 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:05:15,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-21 21:05:15,195 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 21:05:15,196 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:05:15,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:05:15,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2024-11-21 21:05:15,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:05:15,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166836864] [2024-11-21 21:05:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:05:15,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:05:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:05:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:05:15,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:05:15,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166836864] [2024-11-21 21:05:15,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166836864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:05:15,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:05:15,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-21 21:05:15,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189260271] [2024-11-21 21:05:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:05:15,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-21 21:05:15,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:05:15,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-21 21:05:15,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-21 21:05:15,446 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:05:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:05:15,578 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-11-21 21:05:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-21 21:05:15,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-21 21:05:15,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:05:15,579 INFO L225 Difference]: With dead ends: 41 [2024-11-21 21:05:15,580 INFO L226 Difference]: Without dead ends: 32 [2024-11-21 21:05:15,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-21 21:05:15,581 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:05:15,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:05:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-21 21:05:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2024-11-21 21:05:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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 21:05:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-21 21:05:15,591 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2024-11-21 21:05:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:05:15,592 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-21 21:05:15,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:05:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-21 21:05:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-21 21:05:15,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:05:15,594 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:05:15,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-21 21:05:15,594 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:05:15,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:05:15,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2024-11-21 21:05:15,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:05:15,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586615025] [2024-11-21 21:05:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:05:15,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:05:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:05:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:05:15,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:05:15,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586615025] [2024-11-21 21:05:15,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586615025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:05:15,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238649376] [2024-11-21 21:05:15,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:05:15,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:05:15,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:05:15,730 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 21:05:15,732 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 21:05:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:05:15,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-21 21:05:15,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:05:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:05:15,888 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-21 21:05:15,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238649376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:05:15,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-21 21:05:15,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-11-21 21:05:15,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542641826] [2024-11-21 21:05:15,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:05:15,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-21 21:05:15,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:05:15,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-21 21:05:15,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-21 21:05:15,892 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 21:05:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:05:15,983 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2024-11-21 21:05:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-21 21:05:15,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-21 21:05:15,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:05:15,985 INFO L225 Difference]: With dead ends: 41 [2024-11-21 21:05:15,985 INFO L226 Difference]: Without dead ends: 27 [2024-11-21 21:05:15,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-11-21 21:05:15,987 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:05:15,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 35 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:05:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-21 21:05:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2024-11-21 21:05:15,992 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 21:05:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-21 21:05:15,995 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2024-11-21 21:05:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:05:15,995 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-21 21:05:15,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 21:05:15,996 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-21 21:05:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-21 21:05:15,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:05:15,997 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:05:16,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-21 21:05:16,197 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 [2024-11-21 21:05:16,198 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:05:16,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:05:16,198 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2024-11-21 21:05:16,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:05:16,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515175359] [2024-11-21 21:05:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:05:16,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:05:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-21 21:05:16,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372286258] [2024-11-21 21:05:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:05:16,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:05:16,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:05:16,277 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 21:05:16,279 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 21:05:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:05:16,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-21 21:05:16,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:05:16,372 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 [2024-11-21 21:05:16,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-21 21:05:16,453 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 21:05:16,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:05:16,713 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 21:05:16,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:05:16,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515175359] [2024-11-21 21:05:16,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:05:16,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372286258] [2024-11-21 21:05:16,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372286258] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:05:16,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-21 21:05:16,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2024-11-21 21:05:16,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698243884] [2024-11-21 21:05:16,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-21 21:05:16,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-21 21:05:16,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:05:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-21 21:05:16,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-21 21:05:16,719 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 21:05:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:05:16,883 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2024-11-21 21:05:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-21 21:05:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) Word has length 16 [2024-11-21 21:05:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:05:16,885 INFO L225 Difference]: With dead ends: 51 [2024-11-21 21:05:16,885 INFO L226 Difference]: Without dead ends: 49 [2024-11-21 21:05:16,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-21 21:05:16,886 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:05:16,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:05:16,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-21 21:05:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 26. [2024-11-21 21:05:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 21:05:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-21 21:05:16,891 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2024-11-21 21:05:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:05:16,892 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-21 21:05:16,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 21:05:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-21 21:05:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-21 21:05:16,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:05:16,893 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:05:16,901 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 21:05:17,093 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 [2024-11-21 21:05:17,094 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:05:17,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:05:17,095 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2024-11-21 21:05:17,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:05:17,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985607146] [2024-11-21 21:05:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:05:17,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:05:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-21 21:05:17,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984542871] [2024-11-21 21:05:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:05:17,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:05:17,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:05:17,186 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 21:05:17,188 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 21:05:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:05:17,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-21 21:05:17,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:05:17,300 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 [2024-11-21 21:05:17,311 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 [2024-11-21 21:05:17,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:05:17,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:05:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:05:17,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:05:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:05:18,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:05:18,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985607146] [2024-11-21 21:05:18,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:05:18,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984542871] [2024-11-21 21:05:18,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984542871] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:05:18,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-21 21:05:18,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2024-11-21 21:05:18,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212830093] [2024-11-21 21:05:18,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-21 21:05:18,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-21 21:05:18,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:05:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-21 21:05:18,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-21 21:05:18,051 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 21:05:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:05:18,748 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2024-11-21 21:05:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-21 21:05:18,752 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 20 [2024-11-21 21:05:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:05:18,753 INFO L225 Difference]: With dead ends: 78 [2024-11-21 21:05:18,753 INFO L226 Difference]: Without dead ends: 76 [2024-11-21 21:05:18,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2024-11-21 21:05:18,756 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:05:18,756 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 111 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:05:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-21 21:05:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2024-11-21 21:05:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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 21:05:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2024-11-21 21:05:18,771 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 20 [2024-11-21 21:05:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:05:18,771 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2024-11-21 21:05:18,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 21:05:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2024-11-21 21:05:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-21 21:05:18,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:05:18,773 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:05:18,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-21 21:05:18,976 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 [2024-11-21 21:05:18,977 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:05:18,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:05:18,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1334592554, now seen corresponding path program 2 times [2024-11-21 21:05:18,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:05:18,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254422024] [2024-11-21 21:05:18,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:05:18,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:05:19,011 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:05:19,014 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:05:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:05:19,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:05:19,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254422024] [2024-11-21 21:05:19,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254422024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:05:19,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529178228] [2024-11-21 21:05:19,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:05:19,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:05:19,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:05:19,161 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 21:05:19,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-21 21:05:19,222 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:05:19,223 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:05:19,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 21:05:19,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:05:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 21:05:19,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:05:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 21:05:19,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529178228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:05:19,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:05:19,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2024-11-21 21:05:19,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975750556] [2024-11-21 21:05:19,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:05:19,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-21 21:05:19,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:05:19,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-21 21:05:19,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:05:19,318 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:05:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:05:19,454 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2024-11-21 21:05:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-21 21:05:19,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-21 21:05:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:05:19,457 INFO L225 Difference]: With dead ends: 102 [2024-11-21 21:05:19,457 INFO L226 Difference]: Without dead ends: 79 [2024-11-21 21:05:19,457 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-21 21:05:19,458 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:05:19,458 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 58 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:05:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-21 21:05:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2024-11-21 21:05:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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 21:05:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-11-21 21:05:19,477 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 20 [2024-11-21 21:05:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:05:19,478 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-11-21 21:05:19,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:05:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-11-21 21:05:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-21 21:05:19,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:05:19,480 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:05:19,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-21 21:05:19,680 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 [2024-11-21 21:05:19,681 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:05:19,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:05:19,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 3 times [2024-11-21 21:05:19,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:05:19,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953837179] [2024-11-21 21:05:19,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:05:19,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:05:19,752 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:05:19,753 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:05:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:05:19,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:05:19,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953837179] [2024-11-21 21:05:19,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953837179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:05:19,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986378657] [2024-11-21 21:05:19,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:05:19,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:05:19,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:05:19,898 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) [2024-11-21 21:05:19,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-21 21:05:20,056 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:05:20,056 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:05:20,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-21 21:05:20,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:05:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:05:20,123 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:05:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:05:20,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986378657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:05:20,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:05:20,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-21 21:05:20,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518007451] [2024-11-21 21:05:20,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:05:20,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-21 21:05:20,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:05:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-21 21:05:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-21 21:05:20,174 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 21:05:20,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:05:20,329 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2024-11-21 21:05:20,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-21 21:05:20,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 22 [2024-11-21 21:05:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:05:20,330 INFO L225 Difference]: With dead ends: 94 [2024-11-21 21:05:20,330 INFO L226 Difference]: Without dead ends: 76 [2024-11-21 21:05:20,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-11-21 21:05:20,331 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:05:20,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 77 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:05:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-21 21:05:20,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2024-11-21 21:05:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 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 21:05:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2024-11-21 21:05:20,346 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 22 [2024-11-21 21:05:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:05:20,346 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2024-11-21 21:05:20,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 21:05:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2024-11-21 21:05:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-21 21:05:20,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:05:20,348 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:05:20,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-21 21:05:20,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:05:20,553 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:05:20,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:05:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 2 times [2024-11-21 21:05:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:05:20,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729314145] [2024-11-21 21:05:20,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:05:20,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:05:20,576 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:05:20,576 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:05:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:05:20,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:05:20,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729314145] [2024-11-21 21:05:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729314145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:05:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145805760] [2024-11-21 21:05:20,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:05:20,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:05:20,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:05:20,684 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:05:20,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-21 21:05:20,752 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:05:20,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:05:20,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-21 21:05:20,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:05:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:05:20,842 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:05:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:05:20,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145805760] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:05:20,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:05:20,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-21 21:05:20,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585231136] [2024-11-21 21:05:20,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:05:20,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-21 21:05:20,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:05:20,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-21 21:05:20,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-21 21:05:20,903 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 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 21:05:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:05:21,019 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2024-11-21 21:05:21,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-21 21:05:21,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-21 21:05:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:05:21,020 INFO L225 Difference]: With dead ends: 84 [2024-11-21 21:05:21,020 INFO L226 Difference]: Without dead ends: 64 [2024-11-21 21:05:21,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-21 21:05:21,021 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:05:21,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 66 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:05:21,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-21 21:05:21,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2024-11-21 21:05:21,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 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 21:05:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2024-11-21 21:05:21,031 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 24 [2024-11-21 21:05:21,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:05:21,032 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2024-11-21 21:05:21,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 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 21:05:21,032 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2024-11-21 21:05:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-21 21:05:21,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:05:21,032 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:05:21,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-21 21:05:21,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:05:21,237 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:05:21,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:05:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1083970380, now seen corresponding path program 3 times [2024-11-21 21:05:21,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:05:21,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414703963] [2024-11-21 21:05:21,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:05:21,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:05:21,280 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:05:21,280 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:05:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:05:21,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:05:21,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414703963] [2024-11-21 21:05:21,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414703963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:05:21,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248221139] [2024-11-21 21:05:21,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:05:21,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:05:21,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:05:21,366 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:05:21,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-21 21:05:21,486 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:05:21,486 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:05:21,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 21:05:21,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:05:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:05:21,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:05:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:05:21,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248221139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:05:21,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:05:21,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-21 21:05:21,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042421279] [2024-11-21 21:05:21,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:05:21,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-21 21:05:21,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:05:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-21 21:05:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-21 21:05:21,580 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:05:21,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:05:21,693 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2024-11-21 21:05:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-21 21:05:21,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-21 21:05:21,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:05:21,694 INFO L225 Difference]: With dead ends: 64 [2024-11-21 21:05:21,694 INFO L226 Difference]: Without dead ends: 55 [2024-11-21 21:05:21,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-11-21 21:05:21,695 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:05:21,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 36 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:05:21,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-21 21:05:21,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2024-11-21 21:05:21,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 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 21:05:21,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-11-21 21:05:21,702 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 24 [2024-11-21 21:05:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:05:21,703 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-11-21 21:05:21,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:05:21,703 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-11-21 21:05:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-21 21:05:21,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:05:21,704 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:05:21,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-21 21:05:21,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-21 21:05:21,905 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:05:21,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:05:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2024-11-21 21:05:21,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:05:21,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967895840] [2024-11-21 21:05:21,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:05:21,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:05:22,048 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:05:22,048 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-21 21:05:22,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175534074] [2024-11-21 21:05:22,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:05:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:05:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:05:22,052 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:05:22,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-21 21:05:22,237 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:05:22,237 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:05:22,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-21 21:05:22,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:05:22,247 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 [2024-11-21 21:05:22,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:05:22,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:05:22,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:05:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:05:22,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:05:46,898 WARN L286 SmtUtils]: Spent 16.03s on a formula simplification. DAG size of input: 16 DAG size of output: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-21 21:06:07,556 WARN L286 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 68 DAG size of output: 64 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-21 21:06:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:06:07,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:06:07,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967895840] [2024-11-21 21:06:07,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-21 21:06:07,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175534074] [2024-11-21 21:06:07,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175534074] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:06:07,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-21 21:06:07,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2024-11-21 21:06:07,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261616629] [2024-11-21 21:06:07,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-21 21:06:07,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-21 21:06:07,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:06:07,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-21 21:06:07,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-11-21 21:06:07,583 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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 21:06:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:06:08,256 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2024-11-21 21:06:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-21 21:06:08,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-21 21:06:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:06:08,259 INFO L225 Difference]: With dead ends: 107 [2024-11-21 21:06:08,259 INFO L226 Difference]: Without dead ends: 105 [2024-11-21 21:06:08,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2024-11-21 21:06:08,260 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 132 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 21:06:08,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 118 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 21:06:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-21 21:06:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 49. [2024-11-21 21:06:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 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 21:06:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-11-21 21:06:08,270 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 24 [2024-11-21 21:06:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:06:08,270 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-11-21 21:06:08,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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 21:06:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-11-21 21:06:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-21 21:06:08,271 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:06:08,271 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:06:08,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-21 21:06:08,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:06:08,472 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:06:08,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:06:08,472 INFO L85 PathProgramCache]: Analyzing trace with hash 149788298, now seen corresponding path program 4 times [2024-11-21 21:06:08,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:06:08,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264254199] [2024-11-21 21:06:08,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:06:08,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:06:08,502 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:06:08,503 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:06:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 21:06:08,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:06:08,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264254199] [2024-11-21 21:06:08,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264254199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:06:08,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857257128] [2024-11-21 21:06:08,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:06:08,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:06:08,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:06:08,642 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:06:08,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-21 21:06:08,742 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:06:08,742 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:06:08,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-21 21:06:08,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:06:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 21:06:08,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:06:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 21:06:08,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857257128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:06:08,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:06:08,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-21 21:06:08,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078500928] [2024-11-21 21:06:08,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:06:08,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-21 21:06:08,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:06:08,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-21 21:06:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:06:08,907 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 21:06:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:06:09,165 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2024-11-21 21:06:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-21 21:06:09,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 26 [2024-11-21 21:06:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:06:09,165 INFO L225 Difference]: With dead ends: 84 [2024-11-21 21:06:09,166 INFO L226 Difference]: Without dead ends: 75 [2024-11-21 21:06:09,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2024-11-21 21:06:09,166 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:06:09,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 21:06:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-21 21:06:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 49. [2024-11-21 21:06:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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 21:06:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-11-21 21:06:09,179 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 26 [2024-11-21 21:06:09,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:06:09,179 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-11-21 21:06:09,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 21:06:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-11-21 21:06:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-21 21:06:09,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:06:09,182 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:06:09,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-21 21:06:09,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-21 21:06:09,386 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:06:09,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:06:09,386 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 5 times [2024-11-21 21:06:09,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:06:09,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496295890] [2024-11-21 21:06:09,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:06:09,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:06:09,484 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-21 21:06:09,484 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-21 21:06:09,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328910548] [2024-11-21 21:06:09,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:06:09,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:06:09,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:06:09,490 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:06:09,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-21 21:06:09,793 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-21 21:06:09,793 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:06:09,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-21 21:06:09,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:06:09,839 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 [2024-11-21 21:06:09,849 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 [2024-11-21 21:06:09,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:06:09,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2024-11-21 21:06:10,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 21:06:10,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:06:10,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-21 21:06:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:06:10,522 INFO L311 TraceCheckSpWp]: Computing backward predicates...