./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/vnew1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/vnew1.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 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 19:53:11,048 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 19:53:11,112 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 19:53:11,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 19:53:11,118 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 19:53:11,139 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 19:53:11,139 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 19:53:11,139 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 19:53:11,140 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 19:53:11,143 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 19:53:11,143 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 19:53:11,143 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 19:53:11,143 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 19:53:11,145 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 19:53:11,145 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 19:53:11,145 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 19:53:11,145 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 19:53:11,145 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 19:53:11,145 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 19:53:11,145 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 19:53:11,146 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 19:53:11,146 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 19:53:11,146 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 19:53:11,147 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 19:53:11,147 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 19:53:11,148 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 19:53:11,148 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 19:53:11,148 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 19:53:11,148 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 19:53:11,148 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 19:53:11,148 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 19:53:11,149 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 19:53:11,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:53:11,149 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 19:53:11,149 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 19:53:11,149 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 19:53:11,149 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 19:53:11,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 19:53:11,149 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 19:53:11,150 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 19:53:11,150 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 19:53:11,151 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 19:53:11,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 [2024-11-11 19:53:11,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 19:53:11,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 19:53:11,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 19:53:11,422 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 19:53:11,423 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 19:53:11,424 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/vnew1.c [2024-11-11 19:53:12,730 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 19:53:12,923 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 19:53:12,923 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/vnew1.c [2024-11-11 19:53:12,929 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d9175b63/4d4e8f7696894736882ce39389eb4bcb/FLAG725b42fec [2024-11-11 19:53:12,941 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d9175b63/4d4e8f7696894736882ce39389eb4bcb [2024-11-11 19:53:12,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 19:53:12,944 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 19:53:12,946 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 19:53:12,947 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 19:53:12,953 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 19:53:12,954 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:53:12" (1/1) ... [2024-11-11 19:53:12,955 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b47e495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:12, skipping insertion in model container [2024-11-11 19:53:12,955 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:53:12" (1/1) ... [2024-11-11 19:53:12,969 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 19:53:13,098 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/loops-crafted-1/vnew1.c[403,416] [2024-11-11 19:53:13,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:53:13,125 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 19:53:13,137 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/loops-crafted-1/vnew1.c[403,416] [2024-11-11 19:53:13,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:53:13,158 INFO L204 MainTranslator]: Completed translation [2024-11-11 19:53:13,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13 WrapperNode [2024-11-11 19:53:13,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 19:53:13,160 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 19:53:13,161 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 19:53:13,161 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 19:53:13,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,172 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,186 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2024-11-11 19:53:13,187 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 19:53:13,187 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 19:53:13,188 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 19:53:13,188 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 19:53:13,200 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,207 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,221 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-11-11 19:53:13,222 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,222 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,225 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,232 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,232 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,233 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 19:53:13,234 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 19:53:13,234 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 19:53:13,234 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 19:53:13,235 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (1/1) ... [2024-11-11 19:53:13,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:53:13,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:53:13,269 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) [2024-11-11 19:53:13,275 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 [2024-11-11 19:53:13,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 19:53:13,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 19:53:13,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 19:53:13,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 19:53:13,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 19:53:13,372 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 19:53:13,375 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 19:53:13,561 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-11 19:53:13,561 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 19:53:13,574 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 19:53:13,575 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-11 19:53:13,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:53:13 BoogieIcfgContainer [2024-11-11 19:53:13,575 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 19:53:13,577 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 19:53:13,577 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 19:53:13,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 19:53:13,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 07:53:12" (1/3) ... [2024-11-11 19:53:13,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4febd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:53:13, skipping insertion in model container [2024-11-11 19:53:13,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:53:13" (2/3) ... [2024-11-11 19:53:13,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4febd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:53:13, skipping insertion in model container [2024-11-11 19:53:13,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:53:13" (3/3) ... [2024-11-11 19:53:13,583 INFO L112 eAbstractionObserver]: Analyzing ICFG vnew1.c [2024-11-11 19:53:13,598 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 19:53:13,598 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 19:53:13,654 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 19:53:13,662 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;@5674d577, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 19:53:13,663 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 19:53:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 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) [2024-11-11 19:53:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-11 19:53:13,672 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:53:13,673 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:53:13,673 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:53:13,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:53:13,679 INFO L85 PathProgramCache]: Analyzing trace with hash 185205049, now seen corresponding path program 1 times [2024-11-11 19:53:13,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:53:13,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846900769] [2024-11-11 19:53:13,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:53:13,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:53:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:53:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:13,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:53:13,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846900769] [2024-11-11 19:53:13,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846900769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:53:13,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:53:13,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 19:53:13,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417656221] [2024-11-11 19:53:13,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:53:13,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 19:53:13,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:53:13,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 19:53:13,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 19:53:13,854 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-11-11 19:53:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:53:13,864 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2024-11-11 19:53:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 19:53:13,866 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2024-11-11 19:53:13,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:53:13,871 INFO L225 Difference]: With dead ends: 24 [2024-11-11 19:53:13,871 INFO L226 Difference]: Without dead ends: 10 [2024-11-11 19:53:13,873 INFO L434 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 [2024-11-11 19:53:13,875 INFO L435 NwaCegarLoop]: 16 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, 16 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 [2024-11-11 19:53:13,876 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:53:13,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-11 19:53:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-11 19:53:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2024-11-11 19:53:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2024-11-11 19:53:13,898 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2024-11-11 19:53:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:53:13,898 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2024-11-11 19:53:13,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2024-11-11 19:53:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2024-11-11 19:53:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-11 19:53:13,899 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:53:13,899 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:53:13,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 19:53:13,900 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:53:13,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:53:13,900 INFO L85 PathProgramCache]: Analyzing trace with hash 181510965, now seen corresponding path program 1 times [2024-11-11 19:53:13,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:53:13,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127822673] [2024-11-11 19:53:13,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:53:13,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:53:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:53:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:14,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:53:14,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127822673] [2024-11-11 19:53:14,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127822673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:53:14,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:53:14,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 19:53:14,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858133105] [2024-11-11 19:53:14,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:53:14,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-11 19:53:14,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:53:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-11 19:53:14,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-11 19:53:14,277 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-11 19:53:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:53:14,377 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2024-11-11 19:53:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 19:53:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2024-11-11 19:53:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:53:14,378 INFO L225 Difference]: With dead ends: 17 [2024-11-11 19:53:14,378 INFO L226 Difference]: Without dead ends: 15 [2024-11-11 19:53:14,378 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-11 19:53:14,379 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:53:14,379 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 14 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:53:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-11 19:53:14,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2024-11-11 19:53:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2024-11-11 19:53:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-11 19:53:14,388 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2024-11-11 19:53:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:53:14,389 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-11 19:53:14,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-11 19:53:14,390 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-11 19:53:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-11 19:53:14,390 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:53:14,391 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:53:14,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 19:53:14,392 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:53:14,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:53:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1383318765, now seen corresponding path program 1 times [2024-11-11 19:53:14,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:53:14,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066291178] [2024-11-11 19:53:14,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:53:14,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:53:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:53:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:14,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:53:14,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066291178] [2024-11-11 19:53:14,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066291178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:53:14,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976572670] [2024-11-11 19:53:14,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:53:14,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:53:14,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:53:14,786 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) [2024-11-11 19:53:14,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 19:53:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:53:14,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-11 19:53:14,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:53:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:15,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:53:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:15,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976572670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:53:15,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:53:15,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-11 19:53:15,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219575307] [2024-11-11 19:53:15,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:53:15,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-11 19:53:15,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:53:15,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-11 19:53:15,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-11 19:53:15,379 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2024-11-11 19:53:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:53:15,642 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2024-11-11 19:53:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-11 19:53:15,642 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) Word has length 9 [2024-11-11 19:53:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:53:15,644 INFO L225 Difference]: With dead ends: 28 [2024-11-11 19:53:15,645 INFO L226 Difference]: Without dead ends: 26 [2024-11-11 19:53:15,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2024-11-11 19:53:15,648 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:53:15,649 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 51 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:53:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-11 19:53:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2024-11-11 19:53:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:53:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-11-11 19:53:15,658 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 9 [2024-11-11 19:53:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:53:15,658 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-11-11 19:53:15,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2024-11-11 19:53:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-11-11 19:53:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-11 19:53:15,659 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:53:15,659 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:53:15,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 19:53:15,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:53:15,864 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:53:15,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:53:15,865 INFO L85 PathProgramCache]: Analyzing trace with hash 34157897, now seen corresponding path program 1 times [2024-11-11 19:53:15,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:53:15,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251322341] [2024-11-11 19:53:15,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:53:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:53:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:53:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 19:53:16,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:53:16,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251322341] [2024-11-11 19:53:16,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251322341] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:53:16,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:53:16,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 19:53:16,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544928849] [2024-11-11 19:53:16,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:53:16,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 19:53:16,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:53:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 19:53:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 19:53:16,010 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-11-11 19:53:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:53:16,029 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-11-11 19:53:16,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 19:53:16,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-11 19:53:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:53:16,030 INFO L225 Difference]: With dead ends: 29 [2024-11-11 19:53:16,030 INFO L226 Difference]: Without dead ends: 21 [2024-11-11 19:53:16,030 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 19:53:16,031 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:53:16,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:53:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-11 19:53:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-11 19:53:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2024-11-11 19:53:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-11 19:53:16,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2024-11-11 19:53:16,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:53:16,036 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-11 19:53:16,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-11-11 19:53:16,036 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-11 19:53:16,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-11 19:53:16,037 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:53:16,037 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:53:16,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-11 19:53:16,037 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:53:16,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:53:16,037 INFO L85 PathProgramCache]: Analyzing trace with hash -215461579, now seen corresponding path program 2 times [2024-11-11 19:53:16,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:53:16,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040410304] [2024-11-11 19:53:16,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:53:16,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:53:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:53:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:16,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:53:16,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040410304] [2024-11-11 19:53:16,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040410304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:53:16,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792089879] [2024-11-11 19:53:16,238 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 19:53:16,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:53:16,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:53:16,243 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) [2024-11-11 19:53:16,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 19:53:16,298 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 19:53:16,299 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:53:16,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-11 19:53:16,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:53:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:16,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:53:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:16,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792089879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:53:16,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:53:16,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-11 19:53:16,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428735688] [2024-11-11 19:53:16,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:53:16,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-11 19:53:16,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:53:16,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-11 19:53:16,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-11 19:53:16,629 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 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) [2024-11-11 19:53:24,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-11 19:53:29,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-11 19:53:37,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-11 19:53:40,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-11 19:53:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:53:40,433 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2024-11-11 19:53:40,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-11 19:53:40,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 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 12 [2024-11-11 19:53:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:53:40,435 INFO L225 Difference]: With dead ends: 54 [2024-11-11 19:53:40,435 INFO L226 Difference]: Without dead ends: 52 [2024-11-11 19:53:40,435 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=309, Invalid=1173, Unknown=0, NotChecked=0, Total=1482 [2024-11-11 19:53:40,436 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 12 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:53:40,436 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 73 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 198 Invalid, 3 Unknown, 0 Unchecked, 15.1s Time] [2024-11-11 19:53:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-11 19:53:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2024-11-11 19:53:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 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) [2024-11-11 19:53:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-11-11 19:53:40,446 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 12 [2024-11-11 19:53:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:53:40,446 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-11-11 19:53:40,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 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) [2024-11-11 19:53:40,447 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-11-11 19:53:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-11 19:53:40,447 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:53:40,448 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:53:40,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 19:53:40,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:53:40,652 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:53:40,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:53:40,652 INFO L85 PathProgramCache]: Analyzing trace with hash 655979117, now seen corresponding path program 1 times [2024-11-11 19:53:40,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:53:40,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112697437] [2024-11-11 19:53:40,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:53:40,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:53:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:53:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 19:53:40,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:53:40,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112697437] [2024-11-11 19:53:40,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112697437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:53:40,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228217034] [2024-11-11 19:53:40,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:53:40,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:53:40,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:53:40,846 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) [2024-11-11 19:53:40,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 19:53:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:53:40,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-11 19:53:40,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:53:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:41,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:53:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:41,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228217034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:53:41,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:53:41,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-11 19:53:41,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997848978] [2024-11-11 19:53:41,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:53:41,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-11 19:53:41,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:53:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-11 19:53:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-11-11 19:53:41,177 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:53:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:53:41,352 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2024-11-11 19:53:41,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 19:53:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-11 19:53:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:53:41,353 INFO L225 Difference]: With dead ends: 54 [2024-11-11 19:53:41,353 INFO L226 Difference]: Without dead ends: 35 [2024-11-11 19:53:41,354 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2024-11-11 19:53:41,354 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:53:41,354 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 49 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:53:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-11 19:53:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-11 19:53:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 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) [2024-11-11 19:53:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-11-11 19:53:41,361 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 15 [2024-11-11 19:53:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:53:41,362 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-11-11 19:53:41,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:53:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-11-11 19:53:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-11 19:53:41,362 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:53:41,362 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:53:41,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 19:53:41,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:53:41,563 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:53:41,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:53:41,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2023044661, now seen corresponding path program 3 times [2024-11-11 19:53:41,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:53:41,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906027180] [2024-11-11 19:53:41,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:53:41,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:53:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:53:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:42,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:53:42,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906027180] [2024-11-11 19:53:42,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906027180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:53:42,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426400676] [2024-11-11 19:53:42,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 19:53:42,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:53:42,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:53:42,061 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) [2024-11-11 19:53:42,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 19:53:42,135 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-11 19:53:42,135 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:53:42,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-11 19:53:42,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:53:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:42,665 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:53:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:53:43,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426400676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:53:43,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:53:43,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2024-11-11 19:53:43,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944627927] [2024-11-11 19:53:43,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:53:43,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-11 19:53:43,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:53:43,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-11 19:53:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2024-11-11 19:53:43,374 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 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) [2024-11-11 19:53:53,332 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-11 19:54:01,697 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-11 19:54:13,964 WARN L286 SmtUtils]: Spent 12.04s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-11 19:54:22,127 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-11 19:54:24,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-11 19:54:40,798 WARN L286 SmtUtils]: Spent 12.04s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-11 19:54:49,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-11 19:54:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:50,240 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2024-11-11 19:54:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-11 19:54:50,241 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 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 18 [2024-11-11 19:54:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:50,242 INFO L225 Difference]: With dead ends: 114 [2024-11-11 19:54:50,242 INFO L226 Difference]: Without dead ends: 112 [2024-11-11 19:54:50,243 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 61.3s TimeCoverageRelationStatistics Valid=1041, Invalid=4509, Unknown=0, NotChecked=0, Total=5550 [2024-11-11 19:54:50,244 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 220 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:50,244 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 124 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 605 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2024-11-11 19:54:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-11 19:54:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 64. [2024-11-11 19:54:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 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) [2024-11-11 19:54:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2024-11-11 19:54:50,256 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 18 [2024-11-11 19:54:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:50,257 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2024-11-11 19:54:50,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 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) [2024-11-11 19:54:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2024-11-11 19:54:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-11 19:54:50,258 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:50,258 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:54:50,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 19:54:50,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:50,461 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:50,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash -172742419, now seen corresponding path program 2 times [2024-11-11 19:54:50,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:50,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584146314] [2024-11-11 19:54:50,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:50,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:51,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:51,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584146314] [2024-11-11 19:54:51,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584146314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:54:51,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475772524] [2024-11-11 19:54:51,093 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 19:54:51,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:51,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:54:51,095 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) [2024-11-11 19:54:51,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 19:54:51,157 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 19:54:51,157 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:54:51,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-11 19:54:51,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:54:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:51,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:54:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:52,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475772524] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:54:52,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:54:52,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2024-11-11 19:54:52,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585517118] [2024-11-11 19:54:52,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:54:52,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-11 19:54:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:52,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-11 19:54:52,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2024-11-11 19:54:52,179 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 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) [2024-11-11 19:54:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:53,243 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2024-11-11 19:54:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-11 19:54:53,243 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 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 23 [2024-11-11 19:54:53,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:53,244 INFO L225 Difference]: With dead ends: 95 [2024-11-11 19:54:53,244 INFO L226 Difference]: Without dead ends: 64 [2024-11-11 19:54:53,244 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=411, Invalid=2345, Unknown=0, NotChecked=0, Total=2756 [2024-11-11 19:54:53,245 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:53,245 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 93 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 19:54:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-11 19:54:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-11 19:54:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 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) [2024-11-11 19:54:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2024-11-11 19:54:53,265 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 23 [2024-11-11 19:54:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:53,265 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2024-11-11 19:54:53,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 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) [2024-11-11 19:54:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2024-11-11 19:54:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-11 19:54:53,266 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:53,266 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:54:53,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-11 19:54:53,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:53,467 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:53,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash -946138643, now seen corresponding path program 3 times [2024-11-11 19:54:53,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:53,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089188675] [2024-11-11 19:54:53,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:53,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:54,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:54,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089188675] [2024-11-11 19:54:54,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089188675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:54:54,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468162958] [2024-11-11 19:54:54,227 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 19:54:54,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:54,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:54:54,232 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) [2024-11-11 19:54:54,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 19:54:54,305 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-11 19:54:54,305 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:54:54,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-11 19:54:54,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:54:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:54,783 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:54:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:55,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468162958] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:54:55,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:54:55,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2024-11-11 19:54:55,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661317800] [2024-11-11 19:54:55,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:54:55,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-11 19:54:55,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:55,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-11 19:54:55,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2024-11-11 19:54:55,336 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 37 states have internal predecessors, (70), 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)