./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_const_m5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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_const_m5.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 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 19:53:48,939 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 19:53:49,026 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 19:53:49,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 19:53:49,034 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 19:53:49,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 19:53:49,068 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 19:53:49,069 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 19:53:49,069 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 19:53:49,071 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 19:53:49,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 19:53:49,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 19:53:49,072 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 19:53:49,073 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 19:53:49,074 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 19:53:49,075 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 19:53:49,075 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 19:53:49,075 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 19:53:49,076 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 19:53:49,076 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 19:53:49,076 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 19:53:49,080 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 19:53:49,080 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 19:53:49,080 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 19:53:49,081 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 19:53:49,081 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 19:53:49,081 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 19:53:49,081 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 19:53:49,082 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 19:53:49,082 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 19:53:49,082 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 19:53:49,082 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 19:53:49,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:53:49,083 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 19:53:49,083 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 19:53:49,083 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 19:53:49,084 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 19:53:49,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 19:53:49,084 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 19:53:49,085 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 19:53:49,086 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 19:53:49,086 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 19:53:49,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4 [2024-10-23 19:53:49,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 19:53:49,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 19:53:49,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 19:53:49,340 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 19:53:49,341 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 19:53:49,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c [2024-10-23 19:53:50,733 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 19:53:50,917 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 19:53:50,917 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c [2024-10-23 19:53:50,926 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51a2cc773/5c8a95b37e834809aedead71ad4cf59b/FLAGbdc5ada17 [2024-10-23 19:53:50,940 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51a2cc773/5c8a95b37e834809aedead71ad4cf59b [2024-10-23 19:53:50,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 19:53:50,944 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 19:53:50,946 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 19:53:50,946 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 19:53:50,951 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 19:53:50,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:53:50" (1/1) ... [2024-10-23 19:53:50,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b06d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:50, skipping insertion in model container [2024-10-23 19:53:50,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:53:50" (1/1) ... [2024-10-23 19:53:50,973 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 19:53:51,149 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_const_m5.c[408,421] [2024-10-23 19:53:51,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:53:51,195 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 19:53:51,208 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_const_m5.c[408,421] [2024-10-23 19:53:51,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:53:51,246 INFO L204 MainTranslator]: Completed translation [2024-10-23 19:53:51,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51 WrapperNode [2024-10-23 19:53:51,247 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 19:53:51,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 19:53:51,248 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 19:53:51,248 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 19:53:51,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,263 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,291 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2024-10-23 19:53:51,292 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 19:53:51,293 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 19:53:51,293 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 19:53:51,293 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 19:53:51,304 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,307 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,330 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]. [2024-10-23 19:53:51,331 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,331 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,337 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,343 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,347 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,351 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 19:53:51,352 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 19:53:51,352 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 19:53:51,352 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 19:53:51,353 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (1/1) ... [2024-10-23 19:53:51,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:53:51,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:53:51,385 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) [2024-10-23 19:53:51,395 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 [2024-10-23 19:53:51,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 19:53:51,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 19:53:51,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-23 19:53:51,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-23 19:53:51,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-23 19:53:51,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-23 19:53:51,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 19:53:51,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 19:53:51,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-23 19:53:51,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-23 19:53:51,524 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 19:53:51,526 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 19:53:51,804 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-10-23 19:53:51,804 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 19:53:51,852 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 19:53:51,853 INFO L314 CfgBuilder]: Removed 11 assume(true) statements. [2024-10-23 19:53:51,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:53:51 BoogieIcfgContainer [2024-10-23 19:53:51,853 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 19:53:51,856 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 19:53:51,856 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 19:53:51,860 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 19:53:51,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:53:50" (1/3) ... [2024-10-23 19:53:51,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2494422b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:53:51, skipping insertion in model container [2024-10-23 19:53:51,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:51" (2/3) ... [2024-10-23 19:53:51,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2494422b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:53:51, skipping insertion in model container [2024-10-23 19:53:51,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:53:51" (3/3) ... [2024-10-23 19:53:51,864 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c [2024-10-23 19:53:51,881 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 19:53:51,881 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 19:53:51,949 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 19:53:51,956 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;@53c3441b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 19:53:51,956 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 19:53:51,961 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) [2024-10-23 19:53:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-23 19:53:51,968 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:51,969 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] [2024-10-23 19:53:51,970 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:51,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:51,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1439288402, now seen corresponding path program 1 times [2024-10-23 19:53:51,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:51,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852646694] [2024-10-23 19:53:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:51,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:53:52,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:52,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852646694] [2024-10-23 19:53:52,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852646694] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:53:52,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:53:52,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 19:53:52,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604151023] [2024-10-23 19:53:52,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:53:52,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-23 19:53:52,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:52,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-23 19:53:52,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-23 19:53:52,273 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) [2024-10-23 19:53:52,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:52,331 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2024-10-23 19:53:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-23 19:53:52,334 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 [2024-10-23 19:53:52,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:52,341 INFO L225 Difference]: With dead ends: 57 [2024-10-23 19:53:52,342 INFO L226 Difference]: Without dead ends: 27 [2024-10-23 19:53:52,344 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 [2024-10-23 19:53:52,347 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 [2024-10-23 19:53:52,350 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] [2024-10-23 19:53:52,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-23 19:53:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-23 19:53:52,374 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) [2024-10-23 19:53:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-10-23 19:53:52,376 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 26 [2024-10-23 19:53:52,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:52,377 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-10-23 19:53:52,377 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) [2024-10-23 19:53:52,378 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-10-23 19:53:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-23 19:53:52,378 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:52,379 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] [2024-10-23 19:53:52,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 19:53:52,379 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:52,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:52,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1795376710, now seen corresponding path program 1 times [2024-10-23 19:53:52,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:52,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060061864] [2024-10-23 19:53:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:52,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:53:52,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060061864] [2024-10-23 19:53:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060061864] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:53:52,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:53:52,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 19:53:52,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091116042] [2024-10-23 19:53:52,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:53:52,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:53:52,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:52,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:53:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:53:52,524 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) [2024-10-23 19:53:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:52,593 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2024-10-23 19:53:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:53:52,594 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 [2024-10-23 19:53:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:52,595 INFO L225 Difference]: With dead ends: 52 [2024-10-23 19:53:52,595 INFO L226 Difference]: Without dead ends: 28 [2024-10-23 19:53:52,595 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 [2024-10-23 19:53:52,597 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:53:52,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:53:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-23 19:53:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-23 19:53:52,604 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) [2024-10-23 19:53:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2024-10-23 19:53:52,606 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 26 [2024-10-23 19:53:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:52,607 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2024-10-23 19:53:52,607 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) [2024-10-23 19:53:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2024-10-23 19:53:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-23 19:53:52,609 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:52,609 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] [2024-10-23 19:53:52,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-23 19:53:52,610 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:52,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:52,614 INFO L85 PathProgramCache]: Analyzing trace with hash -146231318, now seen corresponding path program 1 times [2024-10-23 19:53:52,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:52,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252114912] [2024-10-23 19:53:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:52,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-23 19:53:52,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:52,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252114912] [2024-10-23 19:53:52,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252114912] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:53:52,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:53:52,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-23 19:53:52,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265557450] [2024-10-23 19:53:52,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:53:52,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 19:53:52,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 19:53:52,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:53:52,730 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) [2024-10-23 19:53:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:52,820 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2024-10-23 19:53:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:53:52,821 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 [2024-10-23 19:53:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:52,821 INFO L225 Difference]: With dead ends: 60 [2024-10-23 19:53:52,821 INFO L226 Difference]: Without dead ends: 38 [2024-10-23 19:53:52,822 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 [2024-10-23 19:53:52,825 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-10-23 19:53:52,825 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] [2024-10-23 19:53:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-23 19:53:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-23 19:53:52,834 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) [2024-10-23 19:53:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2024-10-23 19:53:52,835 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2024-10-23 19:53:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:52,835 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2024-10-23 19:53:52,835 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) [2024-10-23 19:53:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2024-10-23 19:53:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-23 19:53:52,836 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:52,837 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] [2024-10-23 19:53:52,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-23 19:53:52,837 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:52,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:52,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1466683388, now seen corresponding path program 1 times [2024-10-23 19:53:52,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:52,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178303736] [2024-10-23 19:53:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:52,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-23 19:53:53,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:53,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178303736] [2024-10-23 19:53:53,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178303736] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:53:53,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246158893] [2024-10-23 19:53:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:53,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:53,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:53:53,032 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) [2024-10-23 19:53:53,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 19:53:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:53,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:53:53,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:53:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-23 19:53:53,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:53:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-23 19:53:53,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246158893] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:53:53,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:53:53,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-23 19:53:53,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116418964] [2024-10-23 19:53:53,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:53:53,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-23 19:53:53,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:53,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-23 19:53:53,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:53:53,258 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) [2024-10-23 19:53:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:53,351 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2024-10-23 19:53:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:53:53,352 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 [2024-10-23 19:53:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:53,353 INFO L225 Difference]: With dead ends: 73 [2024-10-23 19:53:53,354 INFO L226 Difference]: Without dead ends: 39 [2024-10-23 19:53:53,355 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 [2024-10-23 19:53:53,356 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-10-23 19:53:53,360 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] [2024-10-23 19:53:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-23 19:53:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-10-23 19:53:53,370 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) [2024-10-23 19:53:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2024-10-23 19:53:53,371 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 37 [2024-10-23 19:53:53,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:53,372 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2024-10-23 19:53:53,373 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) [2024-10-23 19:53:53,373 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2024-10-23 19:53:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-23 19:53:53,378 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:53,378 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] [2024-10-23 19:53:53,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-23 19:53:53,579 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 [2024-10-23 19:53:53,580 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:53,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:53,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1465337896, now seen corresponding path program 2 times [2024-10-23 19:53:53,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:53,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859015974] [2024-10-23 19:53:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:53,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:53:53,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:53,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859015974] [2024-10-23 19:53:53,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859015974] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:53:53,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273732720] [2024-10-23 19:53:53,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:53:53,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:53,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:53:53,724 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) [2024-10-23 19:53:53,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 19:53:53,814 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:53:53,814 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:53:53,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:53:53,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:53:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:53:53,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:53:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:53:53,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273732720] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:53:53,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:53:53,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-23 19:53:53,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308407296] [2024-10-23 19:53:53,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:53:53,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-23 19:53:53,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:53,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-23 19:53:53,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-23 19:53:53,983 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) [2024-10-23 19:53:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:54,117 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2024-10-23 19:53:54,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-23 19:53:54,118 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 [2024-10-23 19:53:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:54,118 INFO L225 Difference]: With dead ends: 80 [2024-10-23 19:53:54,118 INFO L226 Difference]: Without dead ends: 49 [2024-10-23 19:53:54,119 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 [2024-10-23 19:53:54,120 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 [2024-10-23 19:53:54,120 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] [2024-10-23 19:53:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-23 19:53:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-23 19:53:54,126 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) [2024-10-23 19:53:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-10-23 19:53:54,127 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 38 [2024-10-23 19:53:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:54,127 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-10-23 19:53:54,127 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) [2024-10-23 19:53:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-10-23 19:53:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-23 19:53:54,128 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:54,128 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] [2024-10-23 19:53:54,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-23 19:53:54,329 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 [2024-10-23 19:53:54,329 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:54,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:54,330 INFO L85 PathProgramCache]: Analyzing trace with hash -937808826, now seen corresponding path program 3 times [2024-10-23 19:53:54,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:54,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080689412] [2024-10-23 19:53:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:54,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:53:58,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:58,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080689412] [2024-10-23 19:53:58,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080689412] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:53:58,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949684117] [2024-10-23 19:53:58,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:53:58,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:58,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:53:58,563 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) [2024-10-23 19:53:58,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 19:53:58,643 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-23 19:53:58,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:53:58,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-10-23 19:53:58,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:53:58,700 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 [2024-10-23 19:53:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:53:59,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 19:54:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949684117] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:01,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:01,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 29] total 64 [2024-10-23 19:54:01,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270691177] [2024-10-23 19:54:01,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:01,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-10-23 19:54:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:01,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-10-23 19:54:01,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3844, Unknown=0, NotChecked=0, Total=4032 [2024-10-23 19:54:01,046 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 64 states, 64 states have (on average 1.75) internal successors, (112), 64 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) [2024-10-23 19:54:02,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:02,053 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2024-10-23 19:54:02,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-23 19:54:02,053 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.75) internal successors, (112), 64 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 [2024-10-23 19:54:02,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:02,054 INFO L225 Difference]: With dead ends: 90 [2024-10-23 19:54:02,054 INFO L226 Difference]: Without dead ends: 86 [2024-10-23 19:54:02,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=188, Invalid=3844, Unknown=0, NotChecked=0, Total=4032 [2024-10-23 19:54:02,057 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 1907 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:02,059 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 327 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1907 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-23 19:54:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-23 19:54:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2024-10-23 19:54:02,076 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) [2024-10-23 19:54:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2024-10-23 19:54:02,078 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 48 [2024-10-23 19:54:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:02,079 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2024-10-23 19:54:02,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.75) internal successors, (112), 64 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) [2024-10-23 19:54:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2024-10-23 19:54:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-23 19:54:02,081 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:02,082 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] [2024-10-23 19:54:02,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-23 19:54:02,285 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 [2024-10-23 19:54:02,286 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:02,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1905736107, now seen corresponding path program 4 times [2024-10-23 19:54:02,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:02,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480016319] [2024-10-23 19:54:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:02,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-23 19:54:02,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:02,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480016319] [2024-10-23 19:54:02,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480016319] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:02,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165276672] [2024-10-23 19:54:02,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:54:02,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:02,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:02,417 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) [2024-10-23 19:54:02,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 19:54:02,494 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:54:02,494 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:02,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-23 19:54:02,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-23 19:54:02,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-23 19:54:02,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165276672] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:02,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:02,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-10-23 19:54:02,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489264345] [2024-10-23 19:54:02,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:02,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-23 19:54:02,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-23 19:54:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-10-23 19:54:02,670 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) [2024-10-23 19:54:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:03,312 INFO L93 Difference]: Finished difference Result 175 states and 222 transitions. [2024-10-23 19:54:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-23 19:54:03,313 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 [2024-10-23 19:54:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:03,314 INFO L225 Difference]: With dead ends: 175 [2024-10-23 19:54:03,314 INFO L226 Difference]: Without dead ends: 60 [2024-10-23 19:54:03,315 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 [2024-10-23 19:54:03,317 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:03,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 74 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-23 19:54:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-23 19:54:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-10-23 19:54:03,327 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) [2024-10-23 19:54:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-10-23 19:54:03,328 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 49 [2024-10-23 19:54:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:03,332 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-10-23 19:54:03,332 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) [2024-10-23 19:54:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-10-23 19:54:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-23 19:54:03,333 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:03,333 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] [2024-10-23 19:54:03,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-23 19:54:03,533 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 [2024-10-23 19:54:03,534 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:03,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:03,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1240289028, now seen corresponding path program 5 times [2024-10-23 19:54:03,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:03,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806948683] [2024-10-23 19:54:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:03,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:54:10,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:10,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806948683] [2024-10-23 19:54:10,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806948683] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:10,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317991784] [2024-10-23 19:54:10,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 19:54:10,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:10,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:10,365 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) [2024-10-23 19:54:10,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 19:54:10,480 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-23 19:54:10,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:10,483 WARN L253 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-10-23 19:54:10,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:10,565 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 [2024-10-23 19:54:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:54:12,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:15,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317991784] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:15,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:15,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 39, 39] total 119 [2024-10-23 19:54:15,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738634677] [2024-10-23 19:54:15,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:15,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2024-10-23 19:54:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2024-10-23 19:54:15,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=13647, Unknown=0, NotChecked=0, Total=14042 [2024-10-23 19:54:15,901 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 119 states, 119 states have (on average 1.3865546218487395) internal successors, (165), 119 states have internal predecessors, (165), 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) [2024-10-23 19:54:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:26,307 INFO L93 Difference]: Finished difference Result 249 states and 298 transitions. [2024-10-23 19:54:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-10-23 19:54:26,308 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.3865546218487395) internal successors, (165), 119 states have internal predecessors, (165), 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 [2024-10-23 19:54:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:26,310 INFO L225 Difference]: With dead ends: 249 [2024-10-23 19:54:26,310 INFO L226 Difference]: Without dead ends: 197 [2024-10-23 19:54:26,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1248, Invalid=32058, Unknown=0, NotChecked=0, Total=33306 [2024-10-23 19:54:26,317 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 236 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 9165 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 9655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 9165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:26,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 680 Invalid, 9655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 9165 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-10-23 19:54:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-10-23 19:54:26,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2024-10-23 19:54:26,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 126 states have internal predecessors, (150), 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) [2024-10-23 19:54:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2024-10-23 19:54:26,342 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 59 [2024-10-23 19:54:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:26,342 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2024-10-23 19:54:26,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.3865546218487395) internal successors, (165), 119 states have internal predecessors, (165), 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) [2024-10-23 19:54:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2024-10-23 19:54:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-23 19:54:26,344 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:26,344 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] [2024-10-23 19:54:26,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-23 19:54:26,544 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 [2024-10-23 19:54:26,545 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:26,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash -990766119, now seen corresponding path program 6 times [2024-10-23 19:54:26,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:26,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236482207] [2024-10-23 19:54:26,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:26,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-10-23 19:54:26,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:26,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236482207] [2024-10-23 19:54:26,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236482207] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:26,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820379521] [2024-10-23 19:54:26,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 19:54:26,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:26,688 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) [2024-10-23 19:54:26,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-23 19:54:26,771 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-23 19:54:26,771 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:26,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-23 19:54:26,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-10-23 19:54:26,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-10-23 19:54:27,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820379521] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:27,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:27,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2024-10-23 19:54:27,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582912721] [2024-10-23 19:54:27,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:27,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-23 19:54:27,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-23 19:54:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2024-10-23 19:54:27,035 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 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) [2024-10-23 19:54:27,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:27,658 INFO L93 Difference]: Finished difference Result 183 states and 222 transitions. [2024-10-23 19:54:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-23 19:54:27,659 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 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 [2024-10-23 19:54:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:27,659 INFO L225 Difference]: With dead ends: 183 [2024-10-23 19:54:27,659 INFO L226 Difference]: Without dead ends: 71 [2024-10-23 19:54:27,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2024-10-23 19:54:27,661 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:27,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 80 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-23 19:54:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-23 19:54:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-10-23 19:54:27,672 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) [2024-10-23 19:54:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2024-10-23 19:54:27,673 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 60 [2024-10-23 19:54:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:27,674 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2024-10-23 19:54:27,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 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) [2024-10-23 19:54:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2024-10-23 19:54:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-23 19:54:27,675 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:27,675 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] [2024-10-23 19:54:27,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-23 19:54:27,875 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 [2024-10-23 19:54:27,876 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:27,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:27,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1063443898, now seen corresponding path program 7 times [2024-10-23 19:54:27,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:27,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641213734] [2024-10-23 19:54:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:27,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:54:35,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:35,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641213734] [2024-10-23 19:54:35,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641213734] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:35,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999761172] [2024-10-23 19:54:35,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 19:54:35,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:35,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:35,135 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) [2024-10-23 19:54:35,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-23 19:54:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:35,218 WARN L253 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-10-23 19:54:35,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:35,340 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 [2024-10-23 19:54:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:54:39,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-23 19:54:45,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999761172] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:45,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:45,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 50, 49] total 151 [2024-10-23 19:54:45,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671352031] [2024-10-23 19:54:45,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:45,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2024-10-23 19:54:45,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:45,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2024-10-23 19:54:45,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=22177, Unknown=0, NotChecked=0, Total=22650 [2024-10-23 19:54:45,176 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 151 states, 151 states have (on average 1.304635761589404) internal successors, (197), 151 states have internal predecessors, (197), 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) [2024-10-23 19:55:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:55:00,002 INFO L93 Difference]: Finished difference Result 245 states and 290 transitions. [2024-10-23 19:55:00,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-10-23 19:55:00,002 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.304635761589404) internal successors, (197), 151 states have internal predecessors, (197), 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 [2024-10-23 19:55:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:55:00,003 INFO L225 Difference]: With dead ends: 245 [2024-10-23 19:55:00,003 INFO L226 Difference]: Without dead ends: 184 [2024-10-23 19:55:00,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9110 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=1538, Invalid=49764, Unknown=0, NotChecked=0, Total=51302 [2024-10-23 19:55:00,007 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 421 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 12758 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 13977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 12758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:55:00,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 565 Invalid, 13977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 12758 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-10-23 19:55:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-10-23 19:55:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 147. [2024-10-23 19:55:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1575342465753424) internal successors, (169), 146 states have internal predecessors, (169), 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) [2024-10-23 19:55:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2024-10-23 19:55:00,040 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 70 [2024-10-23 19:55:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:55:00,040 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2024-10-23 19:55:00,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.304635761589404) internal successors, (197), 151 states have internal predecessors, (197), 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) [2024-10-23 19:55:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2024-10-23 19:55:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-23 19:55:00,041 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:55:00,041 INFO L215 NwaCegarLoop]: trace histogram [5, 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] [2024-10-23 19:55:00,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-23 19:55:00,241 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 [2024-10-23 19:55:00,242 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:55:00,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:55:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash -821465836, now seen corresponding path program 8 times [2024-10-23 19:55:00,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:55:00,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643582957] [2024-10-23 19:55:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:55:00,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:55:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-23 19:55:00,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:55:00,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643582957] [2024-10-23 19:55:00,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643582957] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:55:00,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050542913] [2024-10-23 19:55:00,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:55:00,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:55:00,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:55:00,424 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) [2024-10-23 19:55:00,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-23 19:55:00,503 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:55:00,503 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:55:00,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-23 19:55:00,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:55:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-23 19:55:00,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:55:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-23 19:55:00,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050542913] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:55:00,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:55:00,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-23 19:55:00,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303407220] [2024-10-23 19:55:00,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:55:00,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-23 19:55:00,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:55:00,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-23 19:55:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-10-23 19:55:00,712 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 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) [2024-10-23 19:55:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:55:01,011 INFO L93 Difference]: Finished difference Result 272 states and 315 transitions. [2024-10-23 19:55:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-23 19:55:01,011 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 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 71 [2024-10-23 19:55:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:55:01,012 INFO L225 Difference]: With dead ends: 272 [2024-10-23 19:55:01,012 INFO L226 Difference]: Without dead ends: 86 [2024-10-23 19:55:01,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-10-23 19:55:01,013 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 19:55:01,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 19:55:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-23 19:55:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2024-10-23 19:55:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 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) [2024-10-23 19:55:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2024-10-23 19:55:01,028 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 71 [2024-10-23 19:55:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:55:01,028 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2024-10-23 19:55:01,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 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) [2024-10-23 19:55:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2024-10-23 19:55:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-10-23 19:55:01,029 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:55:01,029 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2024-10-23 19:55:01,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-23 19:55:01,229 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 [2024-10-23 19:55:01,230 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:55:01,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:55:01,230 INFO L85 PathProgramCache]: Analyzing trace with hash 198891414, now seen corresponding path program 9 times [2024-10-23 19:55:01,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:55:01,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431795578] [2024-10-23 19:55:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:55:01,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:55:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-23 19:55:01,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:55:01,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431795578] [2024-10-23 19:55:01,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431795578] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:55:01,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942019590] [2024-10-23 19:55:01,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:55:01,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:55:01,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:55:01,407 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) [2024-10-23 19:55:01,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-23 19:55:01,497 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-23 19:55:01,497 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:55:01,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-23 19:55:01,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:55:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-23 19:55:01,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:55:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-10-23 19:55:01,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942019590] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:55:01,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:55:01,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-23 19:55:01,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720129528] [2024-10-23 19:55:01,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:55:01,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-23 19:55:01,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:55:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-23 19:55:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-10-23 19:55:01,701 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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) [2024-10-23 19:55:01,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:55:01,977 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2024-10-23 19:55:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-23 19:55:01,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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 80 [2024-10-23 19:55:01,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:55:01,979 INFO L225 Difference]: With dead ends: 86 [2024-10-23 19:55:01,979 INFO L226 Difference]: Without dead ends: 82 [2024-10-23 19:55:01,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 148 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2024-10-23 19:55:01,979 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 19:55:01,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 38 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 19:55:01,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-23 19:55:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-10-23 19:55:01,991 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) [2024-10-23 19:55:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2024-10-23 19:55:01,991 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 80 [2024-10-23 19:55:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:55:01,992 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2024-10-23 19:55:01,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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) [2024-10-23 19:55:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2024-10-23 19:55:01,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-23 19:55:01,993 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:55:01,993 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] [2024-10-23 19:55:02,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-23 19:55:02,193 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 [2024-10-23 19:55:02,194 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:55:02,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:55:02,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1906442748, now seen corresponding path program 10 times [2024-10-23 19:55:02,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:55:02,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924541314] [2024-10-23 19:55:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:55:02,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:55:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat