./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.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 e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:50:52,831 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:50:52,886 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:50:52,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:50:52,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:50:52,916 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:50:52,917 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:50:52,917 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:50:52,918 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:50:52,921 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:50:52,921 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:50:52,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:50:52,922 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:50:52,922 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:50:52,922 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:50:52,922 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:50:52,922 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:50:52,923 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:50:52,923 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:50:52,923 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:50:52,923 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:50:52,924 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:50:52,925 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:50:52,925 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:50:52,925 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:50:52,925 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:50:52,925 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:50:52,925 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:50:52,926 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:50:52,926 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:50:52,927 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:50:52,927 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:50:52,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:50:52,928 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:50:52,928 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:50:52,928 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:50:52,928 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:50:52,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:50:52,929 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:50:52,929 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:50:52,929 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:50:52,929 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:50:52,930 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 [2024-10-12 14:50:53,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:50:53,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:50:53,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:50:53,159 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:50:53,159 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:50:53,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2024-10-12 14:50:54,455 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:50:54,625 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:50:54,626 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2024-10-12 14:50:54,636 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d693d5820/b57b0837893145b8997d065ff700b9c3/FLAGd24d7de1f [2024-10-12 14:50:55,042 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d693d5820/b57b0837893145b8997d065ff700b9c3 [2024-10-12 14:50:55,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:50:55,045 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:50:55,047 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:50:55,047 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:50:55,054 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:50:55,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9f163b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55, skipping insertion in model container [2024-10-12 14:50:55,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,071 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:50:55,197 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2024-10-12 14:50:55,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:50:55,220 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:50:55,228 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2024-10-12 14:50:55,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:50:55,252 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:50:55,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55 WrapperNode [2024-10-12 14:50:55,252 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:50:55,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:50:55,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:50:55,254 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:50:55,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,265 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,285 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2024-10-12 14:50:55,285 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:50:55,286 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:50:55,286 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:50:55,286 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:50:55,294 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,294 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,296 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,309 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-12 14:50:55,309 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,309 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,313 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,319 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,321 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,323 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:50:55,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:50:55,324 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:50:55,324 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:50:55,325 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (1/1) ... [2024-10-12 14:50:55,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:50:55,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:55,348 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) [2024-10-12 14:50:55,354 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 [2024-10-12 14:50:55,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:50:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:50:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:50:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:50:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:50:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 14:50:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:50:55,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:50:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:50:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:50:55,453 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:50:55,455 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:50:55,636 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-10-12 14:50:55,636 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:50:55,664 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:50:55,665 INFO L314 CfgBuilder]: Removed 11 assume(true) statements. [2024-10-12 14:50:55,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:50:55 BoogieIcfgContainer [2024-10-12 14:50:55,665 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:50:55,667 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:50:55,667 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:50:55,687 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:50:55,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:50:55" (1/3) ... [2024-10-12 14:50:55,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da182e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:50:55, skipping insertion in model container [2024-10-12 14:50:55,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:50:55" (2/3) ... [2024-10-12 14:50:55,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da182e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:50:55, skipping insertion in model container [2024-10-12 14:50:55,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:50:55" (3/3) ... [2024-10-12 14:50:55,691 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2024-10-12 14:50:55,704 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:50:55,704 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:50:55,753 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:50:55,758 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;@18293eb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:50:55,758 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:50:55,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 14:50:55,765 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:55,765 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:55,766 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:55,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:55,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1439288402, now seen corresponding path program 1 times [2024-10-12 14:50:55,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:55,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108758904] [2024-10-12 14:50:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:55,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:50:55,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:55,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108758904] [2024-10-12 14:50:55,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108758904] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:50:55,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:50:55,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:50:55,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59379113] [2024-10-12 14:50:55,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:50:55,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 14:50:55,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:55,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 14:50:55,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:50:55,933 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 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) [2024-10-12 14:50:55,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:55,970 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2024-10-12 14:50:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 14:50:55,974 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 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) Word has length 26 [2024-10-12 14:50:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:55,979 INFO L225 Difference]: With dead ends: 57 [2024-10-12 14:50:55,979 INFO L226 Difference]: Without dead ends: 27 [2024-10-12 14:50:55,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:50:55,984 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:55,984 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:50:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-12 14:50:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-12 14:50:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 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) [2024-10-12 14:50:56,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-10-12 14:50:56,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 26 [2024-10-12 14:50:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:56,009 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-10-12 14:50:56,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 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) [2024-10-12 14:50:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-10-12 14:50:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 14:50:56,010 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:56,010 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:56,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:50:56,010 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:56,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:56,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1795376710, now seen corresponding path program 1 times [2024-10-12 14:50:56,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:56,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55919450] [2024-10-12 14:50:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:50:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:56,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55919450] [2024-10-12 14:50:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55919450] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:50:56,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:50:56,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 14:50:56,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915779802] [2024-10-12 14:50:56,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:50:56,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:50:56,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:56,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:50:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:50:56,122 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2024-10-12 14:50:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:56,173 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2024-10-12 14:50:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:50:56,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) Word has length 26 [2024-10-12 14:50:56,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:56,174 INFO L225 Difference]: With dead ends: 52 [2024-10-12 14:50:56,174 INFO L226 Difference]: Without dead ends: 28 [2024-10-12 14:50:56,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:50:56,176 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:56,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:50:56,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-12 14:50:56,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-12 14:50:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 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) [2024-10-12 14:50:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2024-10-12 14:50:56,184 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 26 [2024-10-12 14:50:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:56,184 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2024-10-12 14:50:56,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) [2024-10-12 14:50:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2024-10-12 14:50:56,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-12 14:50:56,186 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:56,186 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:56,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 14:50:56,187 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:56,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash -146231318, now seen corresponding path program 1 times [2024-10-12 14:50:56,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:56,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633145651] [2024-10-12 14:50:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:56,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:50:56,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:56,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633145651] [2024-10-12 14:50:56,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633145651] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:50:56,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:50:56,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 14:50:56,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069695208] [2024-10-12 14:50:56,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:50:56,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:50:56,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:56,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:50:56,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:50:56,291 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-10-12 14:50:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:56,366 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2024-10-12 14:50:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:50:56,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 27 [2024-10-12 14:50:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:56,367 INFO L225 Difference]: With dead ends: 60 [2024-10-12 14:50:56,367 INFO L226 Difference]: Without dead ends: 38 [2024-10-12 14:50:56,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:50:56,368 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:56,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 17 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:50:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-12 14:50:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-12 14:50:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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) [2024-10-12 14:50:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2024-10-12 14:50:56,379 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2024-10-12 14:50:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:56,379 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2024-10-12 14:50:56,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-10-12 14:50:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2024-10-12 14:50:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-12 14:50:56,381 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:56,381 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:56,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 14:50:56,381 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:56,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:56,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1466683388, now seen corresponding path program 1 times [2024-10-12 14:50:56,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:56,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366596434] [2024-10-12 14:50:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:56,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:50:56,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:56,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366596434] [2024-10-12 14:50:56,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366596434] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:56,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545307100] [2024-10-12 14:50:56,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:56,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:56,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:56,515 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) [2024-10-12 14:50:56,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:50:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:56,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:50:56,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:50:56,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:50:56,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545307100] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:56,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:56,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-12 14:50:56,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749364364] [2024-10-12 14:50:56,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:56,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 14:50:56,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 14:50:56,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:50:56,676 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:56,743 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2024-10-12 14:50:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:50:56,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-12 14:50:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:56,744 INFO L225 Difference]: With dead ends: 73 [2024-10-12 14:50:56,745 INFO L226 Difference]: Without dead ends: 39 [2024-10-12 14:50:56,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:50:56,746 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:56,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:50:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-12 14:50:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-10-12 14:50:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 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) [2024-10-12 14:50:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2024-10-12 14:50:56,757 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 37 [2024-10-12 14:50:56,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:56,757 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2024-10-12 14:50:56,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:50:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2024-10-12 14:50:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-12 14:50:56,758 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:56,758 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:56,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 14:50:56,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:56,959 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:56,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1465337896, now seen corresponding path program 2 times [2024-10-12 14:50:56,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:56,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156851980] [2024-10-12 14:50:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:50:57,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:57,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156851980] [2024-10-12 14:50:57,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156851980] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:57,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776254483] [2024-10-12 14:50:57,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:50:57,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:57,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:57,065 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) [2024-10-12 14:50:57,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:50:57,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:50:57,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:57,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:50:57,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:50:57,190 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:50:57,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776254483] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:50:57,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:50:57,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-12 14:50:57,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350322670] [2024-10-12 14:50:57,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:57,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 14:50:57,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:57,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 14:50:57,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-12 14:50:57,252 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-10-12 14:50:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:57,356 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2024-10-12 14:50:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 14:50:57,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) Word has length 38 [2024-10-12 14:50:57,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:57,357 INFO L225 Difference]: With dead ends: 80 [2024-10-12 14:50:57,357 INFO L226 Difference]: Without dead ends: 49 [2024-10-12 14:50:57,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-12 14:50:57,358 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:57,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:50:57,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-12 14:50:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-12 14:50:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 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) [2024-10-12 14:50:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-10-12 14:50:57,364 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 38 [2024-10-12 14:50:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:57,364 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-10-12 14:50:57,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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) [2024-10-12 14:50:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-10-12 14:50:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 14:50:57,365 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:57,366 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:50:57,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 14:50:57,566 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 [2024-10-12 14:50:57,567 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:57,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:57,567 INFO L85 PathProgramCache]: Analyzing trace with hash -937808826, now seen corresponding path program 3 times [2024-10-12 14:50:57,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:57,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915307317] [2024-10-12 14:50:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:57,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:51:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:51:00,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:51:00,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915307317] [2024-10-12 14:51:00,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915307317] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:51:00,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507258369] [2024-10-12 14:51:00,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:51:00,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:51:00,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:51:00,278 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) [2024-10-12 14:51:00,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:51:00,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-12 14:51:00,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:51:00,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-10-12 14:51:00,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:51:00,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 14:51:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:51:00,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:51:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 14:51:00,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507258369] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:51:00,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:51:00,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 21 [2024-10-12 14:51:00,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101836783] [2024-10-12 14:51:00,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:51:00,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 14:51:00,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:51:00,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 14:51:00,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-10-12 14:51:00,838 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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) [2024-10-12 14:51:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:51:01,139 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2024-10-12 14:51:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 14:51:01,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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 48 [2024-10-12 14:51:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:51:01,142 INFO L225 Difference]: With dead ends: 90 [2024-10-12 14:51:01,144 INFO L226 Difference]: Without dead ends: 86 [2024-10-12 14:51:01,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-10-12 14:51:01,145 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:51:01,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 174 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 14:51:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-12 14:51:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2024-10-12 14:51:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 83 states have internal predecessors, (103), 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) [2024-10-12 14:51:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2024-10-12 14:51:01,160 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 48 [2024-10-12 14:51:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:51:01,161 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2024-10-12 14:51:01,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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) [2024-10-12 14:51:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2024-10-12 14:51:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-12 14:51:01,162 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:51:01,163 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:51:01,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 14:51:01,363 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 [2024-10-12 14:51:01,364 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:51:01,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:51:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1905736107, now seen corresponding path program 4 times [2024-10-12 14:51:01,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:51:01,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018752615] [2024-10-12 14:51:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:51:01,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:51:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:51:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-12 14:51:01,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:51:01,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018752615] [2024-10-12 14:51:01,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018752615] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:51:01,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961849216] [2024-10-12 14:51:01,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:51:01,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:51:01,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:51:01,459 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) [2024-10-12 14:51:01,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:51:01,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:51:01,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:51:01,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 14:51:01,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:51:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-12 14:51:01,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:51:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-12 14:51:01,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961849216] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:51:01,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:51:01,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-10-12 14:51:01,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64573442] [2024-10-12 14:51:01,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:51:01,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-12 14:51:01,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:51:01,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-12 14:51:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-10-12 14:51:01,648 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:51:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:51:02,079 INFO L93 Difference]: Finished difference Result 175 states and 222 transitions. [2024-10-12 14:51:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 14:51:02,081 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-10-12 14:51:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:51:02,081 INFO L225 Difference]: With dead ends: 175 [2024-10-12 14:51:02,081 INFO L226 Difference]: Without dead ends: 60 [2024-10-12 14:51:02,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2024-10-12 14:51:02,082 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 14:51:02,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 65 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 14:51:02,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-12 14:51:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-10-12 14:51:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 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) [2024-10-12 14:51:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-10-12 14:51:02,091 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 49 [2024-10-12 14:51:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:51:02,091 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-10-12 14:51:02,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:51:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-10-12 14:51:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-12 14:51:02,092 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:51:02,092 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:51:02,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 14:51:02,292 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 [2024-10-12 14:51:02,293 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:51:02,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:51:02,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1240289028, now seen corresponding path program 5 times [2024-10-12 14:51:02,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:51:02,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784587137] [2024-10-12 14:51:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:51:02,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:51:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:51:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:51:06,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:51:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784587137] [2024-10-12 14:51:06,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784587137] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:51:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522817277] [2024-10-12 14:51:06,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:51:06,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:51:06,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:51:06,821 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) [2024-10-12 14:51:06,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:51:06,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-12 14:51:06,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:51:06,894 WARN L253 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-10-12 14:51:06,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:51:06,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 14:51:06,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-12 14:51:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:51:07,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:51:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:51:07,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522817277] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:51:07,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:51:07,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 15, 11] total 48 [2024-10-12 14:51:07,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187523275] [2024-10-12 14:51:07,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:51:07,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-12 14:51:07,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:51:07,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-12 14:51:07,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2024-10-12 14:51:07,778 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 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) [2024-10-12 14:51:10,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:51:10,717 INFO L93 Difference]: Finished difference Result 176 states and 219 transitions. [2024-10-12 14:51:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-12 14:51:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 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 59 [2024-10-12 14:51:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:51:10,721 INFO L225 Difference]: With dead ends: 176 [2024-10-12 14:51:10,721 INFO L226 Difference]: Without dead ends: 170 [2024-10-12 14:51:10,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=776, Invalid=5544, Unknown=0, NotChecked=0, Total=6320 [2024-10-12 14:51:10,724 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 407 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 3346 mSolverCounterSat, 1156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1156 IncrementalHoareTripleChecker+Valid, 3346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-10-12 14:51:10,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 163 Invalid, 4502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1156 Valid, 3346 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-10-12 14:51:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-12 14:51:10,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 63. [2024-10-12 14:51:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 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) [2024-10-12 14:51:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2024-10-12 14:51:10,739 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 59 [2024-10-12 14:51:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:51:10,740 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2024-10-12 14:51:10,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 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) [2024-10-12 14:51:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2024-10-12 14:51:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-12 14:51:10,742 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:51:10,742 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:51:10,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 14:51:10,942 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 [2024-10-12 14:51:10,943 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:51:10,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:51:10,943 INFO L85 PathProgramCache]: Analyzing trace with hash 446028942, now seen corresponding path program 6 times [2024-10-12 14:51:10,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:51:10,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097202473] [2024-10-12 14:51:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:51:10,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:51:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:51:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-10-12 14:51:11,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:51:11,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097202473] [2024-10-12 14:51:11,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097202473] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:51:11,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308393794] [2024-10-12 14:51:11,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 14:51:11,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:51:11,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:51:11,054 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) [2024-10-12 14:51:11,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:51:11,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-12 14:51:11,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:51:11,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 14:51:11,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:51:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-10-12 14:51:11,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:51:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-10-12 14:51:11,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308393794] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:51:11,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:51:11,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 14:51:11,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853420325] [2024-10-12 14:51:11,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:51:11,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 14:51:11,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:51:11,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 14:51:11,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-12 14:51:11,224 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 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) [2024-10-12 14:51:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:51:11,425 INFO L93 Difference]: Finished difference Result 178 states and 217 transitions. [2024-10-12 14:51:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 14:51:11,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 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 60 [2024-10-12 14:51:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:51:11,426 INFO L225 Difference]: With dead ends: 178 [2024-10-12 14:51:11,426 INFO L226 Difference]: Without dead ends: 75 [2024-10-12 14:51:11,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-10-12 14:51:11,427 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:51:11,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:51:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-12 14:51:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2024-10-12 14:51:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 69 states have internal predecessors, (80), 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) [2024-10-12 14:51:11,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2024-10-12 14:51:11,443 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 60 [2024-10-12 14:51:11,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:51:11,444 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2024-10-12 14:51:11,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 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) [2024-10-12 14:51:11,444 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2024-10-12 14:51:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-12 14:51:11,444 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:51:11,444 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:51:11,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 14:51:11,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:51:11,645 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:51:11,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:51:11,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1211467276, now seen corresponding path program 7 times [2024-10-12 14:51:11,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:51:11,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496282330] [2024-10-12 14:51:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:51:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:51:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:51:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-12 14:51:11,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:51:11,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496282330] [2024-10-12 14:51:11,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496282330] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:51:11,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519264304] [2024-10-12 14:51:11,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 14:51:11,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:51:11,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:51:11,772 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:51:11,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 14:51:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:51:11,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 14:51:11,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:51:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-12 14:51:11,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:51:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-12 14:51:12,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519264304] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:51:12,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:51:12,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 14:51:12,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153106153] [2024-10-12 14:51:12,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:51:12,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 14:51:12,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:51:12,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 14:51:12,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-12 14:51:12,020 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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) [2024-10-12 14:51:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:51:12,218 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-10-12 14:51:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 14:51:12,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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 69 [2024-10-12 14:51:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:51:12,219 INFO L225 Difference]: With dead ends: 75 [2024-10-12 14:51:12,219 INFO L226 Difference]: Without dead ends: 71 [2024-10-12 14:51:12,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 124 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2024-10-12 14:51:12,220 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:51:12,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:51:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-12 14:51:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-10-12 14:51:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 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) [2024-10-12 14:51:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2024-10-12 14:51:12,230 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 69 [2024-10-12 14:51:12,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:51:12,230 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2024-10-12 14:51:12,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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) [2024-10-12 14:51:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2024-10-12 14:51:12,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-12 14:51:12,231 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:51:12,231 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:51:12,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 14:51:12,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:51:12,436 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:51:12,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:51:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1063443898, now seen corresponding path program 8 times [2024-10-12 14:51:12,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:51:12,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364731486] [2024-10-12 14:51:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:51:12,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:51:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:51:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 3 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:51:16,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:51:16,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364731486] [2024-10-12 14:51:16,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364731486] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:51:16,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178525453] [2024-10-12 14:51:16,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:51:16,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:51:16,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:51:16,974 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:51:16,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 14:51:17,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:51:17,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:51:17,058 WARN L253 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-10-12 14:51:17,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:51:17,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 14:51:17,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:51:17,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:51:17,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 36 [2024-10-12 14:51:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:51:18,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:51:19,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2024-10-12 14:51:19,020 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:51:19,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 69 [2024-10-12 14:51:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:51:19,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178525453] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:51:19,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:51:19,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 22, 24] total 80 [2024-10-12 14:51:19,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330659714] [2024-10-12 14:51:19,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:51:19,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-10-12 14:51:19,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:51:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-10-12 14:51:19,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=5947, Unknown=0, NotChecked=0, Total=6320 [2024-10-12 14:51:19,204 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 80 states, 80 states have (on average 2.525) internal successors, (202), 80 states have internal predecessors, (202), 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) [2024-10-12 14:51:24,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:51:24,860 INFO L93 Difference]: Finished difference Result 330 states and 390 transitions. [2024-10-12 14:51:24,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-12 14:51:24,860 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.525) internal successors, (202), 80 states have internal predecessors, (202), 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 70 [2024-10-12 14:51:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:51:24,862 INFO L225 Difference]: With dead ends: 330 [2024-10-12 14:51:24,862 INFO L226 Difference]: Without dead ends: 205 [2024-10-12 14:51:24,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1633, Invalid=14623, Unknown=0, NotChecked=0, Total=16256 [2024-10-12 14:51:24,866 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 520 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 6206 mSolverCounterSat, 1598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 7804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1598 IncrementalHoareTripleChecker+Valid, 6206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-10-12 14:51:24,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 280 Invalid, 7804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1598 Valid, 6206 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-10-12 14:51:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-10-12 14:51:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 73. [2024-10-12 14:51:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 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) [2024-10-12 14:51:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2024-10-12 14:51:24,889 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 70 [2024-10-12 14:51:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:51:24,889 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2024-10-12 14:51:24,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.525) internal successors, (202), 80 states have internal predecessors, (202), 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) [2024-10-12 14:51:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2024-10-12 14:51:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-12 14:51:24,890 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:51:24,890 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:51:24,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 14:51:25,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-12 14:51:25,095 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:51:25,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:51:25,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1320222248, now seen corresponding path program 9 times [2024-10-12 14:51:25,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:51:25,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053621958] [2024-10-12 14:51:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:51:25,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:51:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:51:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-10-12 14:51:25,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:51:25,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053621958] [2024-10-12 14:51:25,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053621958] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:51:25,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714520253] [2024-10-12 14:51:25,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:51:25,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:51:25,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:51:25,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:51:25,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 14:51:25,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-12 14:51:25,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:51:25,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 14:51:25,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:51:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-10-12 14:51:25,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:51:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-10-12 14:51:25,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714520253] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:51:25,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:51:25,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2024-10-12 14:51:25,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337899185] [2024-10-12 14:51:25,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:51:25,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-12 14:51:25,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:51:25,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-12 14:51:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:51:25,548 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 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) [2024-10-12 14:51:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:51:25,892 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2024-10-12 14:51:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 14:51:25,892 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 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 72 [2024-10-12 14:51:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:51:25,893 INFO L225 Difference]: With dead ends: 141 [2024-10-12 14:51:25,893 INFO L226 Difference]: Without dead ends: 82 [2024-10-12 14:51:25,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2024-10-12 14:51:25,894 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 82 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:51:25,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 51 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:51:25,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-12 14:51:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-10-12 14:51:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 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) [2024-10-12 14:51:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2024-10-12 14:51:25,917 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 72 [2024-10-12 14:51:25,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:51:25,917 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2024-10-12 14:51:25,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 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) [2024-10-12 14:51:25,917 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2024-10-12 14:51:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-12 14:51:25,918 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:51:25,918 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:51:25,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-12 14:51:26,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:51:26,118 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:51:26,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:51:26,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1906442748, now seen corresponding path program 10 times [2024-10-12 14:51:26,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:51:26,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414681183] [2024-10-12 14:51:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:51:26,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:51:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:51:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 6 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:51:34,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:51:34,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414681183] [2024-10-12 14:51:34,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414681183] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:51:34,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222759843] [2024-10-12 14:51:34,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:51:34,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:51:34,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:51:34,753 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:51:34,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 14:51:34,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:51:34,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:51:34,847 WARN L253 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 209 conjuncts are in the unsatisfiable core [2024-10-12 14:51:34,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:51:34,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-12 14:51:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 5 proven. 150 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:51:41,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:51:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 14:51:42,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222759843] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:51:42,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:51:42,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 17, 15] total 77 [2024-10-12 14:51:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403262155] [2024-10-12 14:51:42,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:51:42,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-10-12 14:51:42,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:51:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-10-12 14:51:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=5566, Unknown=1, NotChecked=0, Total=5852 [2024-10-12 14:51:42,160 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 77 states, 77 states have (on average 2.961038961038961) internal successors, (228), 77 states have internal predecessors, (228), 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) [2024-10-12 14:52:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:52:13,832 INFO L93 Difference]: Finished difference Result 236 states and 279 transitions. [2024-10-12 14:52:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-10-12 14:52:13,833 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.961038961038961) internal successors, (228), 77 states have internal predecessors, (228), 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 81 [2024-10-12 14:52:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:52:13,834 INFO L225 Difference]: With dead ends: 236 [2024-10-12 14:52:13,834 INFO L226 Difference]: Without dead ends: 230 [2024-10-12 14:52:13,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4424 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=1815, Invalid=16269, Unknown=6, NotChecked=0, Total=18090 [2024-10-12 14:52:13,837 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 553 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 6452 mSolverCounterSat, 2253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 8705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2253 IncrementalHoareTripleChecker+Valid, 6452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:52:13,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 218 Invalid, 8705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2253 Valid, 6452 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-10-12 14:52:13,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-10-12 14:52:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 85. [2024-10-12 14:52:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 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) [2024-10-12 14:52:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2024-10-12 14:52:13,861 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 81 [2024-10-12 14:52:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:52:13,862 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2024-10-12 14:52:13,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.961038961038961) internal successors, (228), 77 states have internal predecessors, (228), 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) [2024-10-12 14:52:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2024-10-12 14:52:13,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-12 14:52:13,862 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:52:13,862 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:52:13,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-12 14:52:14,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-12 14:52:14,063 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:52:14,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:52:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2031370866, now seen corresponding path program 11 times [2024-10-12 14:52:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:52:14,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585955391] [2024-10-12 14:52:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:52:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:52:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:52:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-12 14:52:14,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:52:14,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585955391] [2024-10-12 14:52:14,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585955391] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:52:14,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862494786] [2024-10-12 14:52:14,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:52:14,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:52:14,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:52:14,223 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:52:14,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 14:52:14,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-12 14:52:14,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:52:14,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 14:52:14,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:52:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-12 14:52:14,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:52:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-12 14:52:14,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862494786] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:52:14,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:52:14,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-12 14:52:14,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527671894] [2024-10-12 14:52:14,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:52:14,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 14:52:14,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:52:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 14:52:14,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-12 14:52:14,599 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:52:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:52:14,921 INFO L93 Difference]: Finished difference Result 238 states and 277 transitions. [2024-10-12 14:52:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 14:52:14,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2024-10-12 14:52:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:52:14,922 INFO L225 Difference]: With dead ends: 238 [2024-10-12 14:52:14,922 INFO L226 Difference]: Without dead ends: 97 [2024-10-12 14:52:14,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 145 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-10-12 14:52:14,923 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:52:14,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 48 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:52:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-12 14:52:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2024-10-12 14:52:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.120879120879121) internal successors, (102), 91 states have internal predecessors, (102), 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) [2024-10-12 14:52:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-10-12 14:52:14,949 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 82 [2024-10-12 14:52:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:52:14,949 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-10-12 14:52:14,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:52:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-10-12 14:52:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-12 14:52:14,950 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:52:14,950 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:52:14,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-12 14:52:15,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-12 14:52:15,150 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:52:15,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:52:15,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1505378292, now seen corresponding path program 12 times [2024-10-12 14:52:15,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:52:15,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991950145] [2024-10-12 14:52:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:52:15,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:52:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:52:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-10-12 14:52:15,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:52:15,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991950145] [2024-10-12 14:52:15,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991950145] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:52:15,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849367298] [2024-10-12 14:52:15,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 14:52:15,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:52:15,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:52:15,305 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:52:15,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 14:52:15,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-12 14:52:15,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:52:15,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 14:52:15,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:52:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-10-12 14:52:15,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:52:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-10-12 14:52:15,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849367298] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:52:15,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:52:15,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-12 14:52:15,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509000996] [2024-10-12 14:52:15,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:52:15,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 14:52:15,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:52:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 14:52:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-12 14:52:15,692 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:52:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:52:15,980 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2024-10-12 14:52:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 14:52:15,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2024-10-12 14:52:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:52:15,981 INFO L225 Difference]: With dead ends: 97 [2024-10-12 14:52:15,981 INFO L226 Difference]: Without dead ends: 93 [2024-10-12 14:52:15,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2024-10-12 14:52:15,982 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:52:15,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:52:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-12 14:52:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-10-12 14:52:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 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) [2024-10-12 14:52:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2024-10-12 14:52:16,008 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 91 [2024-10-12 14:52:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:52:16,008 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2024-10-12 14:52:16,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:52:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2024-10-12 14:52:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-10-12 14:52:16,009 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:52:16,009 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:52:16,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-12 14:52:16,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-12 14:52:16,210 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:52:16,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:52:16,210 INFO L85 PathProgramCache]: Analyzing trace with hash 613689414, now seen corresponding path program 13 times [2024-10-12 14:52:16,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:52:16,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418696866] [2024-10-12 14:52:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:52:16,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:52:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat