./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/tree_max.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 e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 15:27:24,128 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 15:27:24,206 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 15:27:24,210 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 15:27:24,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 15:27:24,241 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 15:27:24,242 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 15:27:24,242 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 15:27:24,243 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 15:27:24,244 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 15:27:24,244 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 15:27:24,244 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 15:27:24,245 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 15:27:24,246 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 15:27:24,246 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 15:27:24,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 15:27:24,248 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 15:27:24,248 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 15:27:24,248 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 15:27:24,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 15:27:24,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 15:27:24,252 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 15:27:24,253 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 15:27:24,253 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 15:27:24,253 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 15:27:24,253 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 15:27:24,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 15:27:24,254 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 15:27:24,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 15:27:24,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 15:27:24,254 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 15:27:24,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 15:27:24,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:27:24,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 15:27:24,255 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 15:27:24,255 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 15:27:24,255 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 15:27:24,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 15:27:24,256 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 15:27:24,256 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 15:27:24,258 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 15:27:24,258 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 15:27:24,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2024-11-08 15:27:24,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 15:27:24,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 15:27:24,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 15:27:24,511 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 15:27:24,513 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 15:27:24,514 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2024-11-08 15:27:25,906 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 15:27:26,104 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 15:27:26,105 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2024-11-08 15:27:26,111 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4af34b8/d3436170e67d436e9aa65f2de576305d/FLAGa68fb1b26 [2024-11-08 15:27:26,128 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4af34b8/d3436170e67d436e9aa65f2de576305d [2024-11-08 15:27:26,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 15:27:26,132 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 15:27:26,134 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 15:27:26,134 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 15:27:26,139 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 15:27:26,140 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f54aefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26, skipping insertion in model container [2024-11-08 15:27:26,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,161 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 15:27:26,338 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2024-11-08 15:27:26,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:27:26,375 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 15:27:26,389 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2024-11-08 15:27:26,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 15:27:26,420 INFO L204 MainTranslator]: Completed translation [2024-11-08 15:27:26,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26 WrapperNode [2024-11-08 15:27:26,421 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 15:27:26,422 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 15:27:26,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 15:27:26,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 15:27:26,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,437 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,455 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 39 [2024-11-08 15:27:26,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 15:27:26,457 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 15:27:26,457 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 15:27:26,457 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 15:27:26,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,469 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,483 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-08 15:27:26,483 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,483 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,491 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,492 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,493 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,494 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,496 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 15:27:26,497 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 15:27:26,497 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 15:27:26,498 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 15:27:26,498 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (1/1) ... [2024-11-08 15:27:26,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 15:27:26,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:27:26,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 15:27:26,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 15:27:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-08 15:27:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-08 15:27:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 15:27:26,585 INFO L130 BoogieDeclarations]: Found specification of procedure max [2024-11-08 15:27:26,585 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2024-11-08 15:27:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2024-11-08 15:27:26,586 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2024-11-08 15:27:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 15:27:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 15:27:26,588 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-11-08 15:27:26,588 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-11-08 15:27:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-08 15:27:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-08 15:27:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 15:27:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 15:27:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 15:27:26,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 15:27:26,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 15:27:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 15:27:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 15:27:26,705 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 15:27:26,708 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 15:27:26,917 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-11-08 15:27:26,918 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 15:27:26,934 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 15:27:26,936 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 15:27:26,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:27:26 BoogieIcfgContainer [2024-11-08 15:27:26,937 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 15:27:26,939 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 15:27:26,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 15:27:26,942 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 15:27:26,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 03:27:26" (1/3) ... [2024-11-08 15:27:26,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8624c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:27:26, skipping insertion in model container [2024-11-08 15:27:26,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 03:27:26" (2/3) ... [2024-11-08 15:27:26,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8624c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 03:27:26, skipping insertion in model container [2024-11-08 15:27:26,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 03:27:26" (3/3) ... [2024-11-08 15:27:26,946 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2024-11-08 15:27:26,961 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 15:27:26,961 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 15:27:27,012 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 15:27:27,019 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;@1530c60a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 15:27:27,019 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 15:27:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 15:27:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-08 15:27:27,033 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:27,034 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:27:27,034 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:27,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:27,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1128634237, now seen corresponding path program 1 times [2024-11-08 15:27:27,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:27,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101104243] [2024-11-08 15:27:27,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:27,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:27,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:27,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 15:27:27,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:27:27,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101104243] [2024-11-08 15:27:27,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101104243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:27:27,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:27:27,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 15:27:27,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116794016] [2024-11-08 15:27:27,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:27:27,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 15:27:27,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:27:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 15:27:27,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-08 15:27:27,661 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 15:27:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:27:28,068 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2024-11-08 15:27:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 15:27:28,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-08 15:27:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:27:28,079 INFO L225 Difference]: With dead ends: 70 [2024-11-08 15:27:28,079 INFO L226 Difference]: Without dead ends: 36 [2024-11-08 15:27:28,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-08 15:27:28,088 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:27:28,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 114 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 15:27:28,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-08 15:27:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-08 15:27:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 26 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-08 15:27:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-11-08 15:27:28,122 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 19 [2024-11-08 15:27:28,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:27:28,123 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-11-08 15:27:28,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 15:27:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-11-08 15:27:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 15:27:28,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:28,125 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 15:27:28,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 15:27:28,126 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:28,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:28,126 INFO L85 PathProgramCache]: Analyzing trace with hash 92344634, now seen corresponding path program 1 times [2024-11-08 15:27:28,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:28,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703242468] [2024-11-08 15:27:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:28,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:28,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:28,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:28,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:28,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 15:27:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 15:27:28,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:27:28,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703242468] [2024-11-08 15:27:28,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703242468] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 15:27:28,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 15:27:28,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-08 15:27:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206061490] [2024-11-08 15:27:28,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 15:27:28,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 15:27:28,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:27:28,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 15:27:28,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-08 15:27:28,487 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 15:27:28,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:27:28,693 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-11-08 15:27:28,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 15:27:28,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-11-08 15:27:28,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:27:28,695 INFO L225 Difference]: With dead ends: 49 [2024-11-08 15:27:28,695 INFO L226 Difference]: Without dead ends: 38 [2024-11-08 15:27:28,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-08 15:27:28,696 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 15:27:28,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 115 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 15:27:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-08 15:27:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-08 15:27:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.25) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-08 15:27:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2024-11-08 15:27:28,705 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 31 [2024-11-08 15:27:28,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:27:28,705 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2024-11-08 15:27:28,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-08 15:27:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2024-11-08 15:27:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 15:27:28,707 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:28,707 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1] [2024-11-08 15:27:28,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 15:27:28,707 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:28,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash 962263030, now seen corresponding path program 1 times [2024-11-08 15:27:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:28,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038911686] [2024-11-08 15:27:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:29,327 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:29,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:29,349 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:29,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 15:27:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:29,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:29,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 15:27:29,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:27:29,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038911686] [2024-11-08 15:27:29,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038911686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:27:29,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405451367] [2024-11-08 15:27:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:29,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:29,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:27:29,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:27:29,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 15:27:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:29,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-08 15:27:29,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:27:29,713 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 8 treesize of output 1 [2024-11-08 15:27:29,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 15:27:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 15:27:30,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:27:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 15:27:30,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405451367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:27:30,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:27:30,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 23 [2024-11-08 15:27:30,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680724624] [2024-11-08 15:27:30,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:27:30,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 15:27:30,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:27:30,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 15:27:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2024-11-08 15:27:30,298 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 23 states, 20 states have (on average 2.0) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-08 15:27:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:27:30,848 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2024-11-08 15:27:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 15:27:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.0) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 44 [2024-11-08 15:27:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:27:30,850 INFO L225 Difference]: With dead ends: 47 [2024-11-08 15:27:30,850 INFO L226 Difference]: Without dead ends: 45 [2024-11-08 15:27:30,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2024-11-08 15:27:30,852 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:27:30,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 183 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 15:27:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-08 15:27:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2024-11-08 15:27:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-08 15:27:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-11-08 15:27:30,865 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 44 [2024-11-08 15:27:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:27:30,865 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-11-08 15:27:30,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.0) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-08 15:27:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-11-08 15:27:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 15:27:30,869 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:30,869 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-08 15:27:30,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 15:27:31,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:31,070 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:31,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:31,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1004737340, now seen corresponding path program 1 times [2024-11-08 15:27:31,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:31,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357275101] [2024-11-08 15:27:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:31,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:31,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:31,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:31,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 15:27:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:31,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:31,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 15:27:31,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:27:31,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357275101] [2024-11-08 15:27:31,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357275101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:27:31,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901733282] [2024-11-08 15:27:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:31,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:31,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:27:31,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:27:31,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 15:27:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:32,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-08 15:27:32,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:27:32,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 15:27:32,116 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 8 treesize of output 1 [2024-11-08 15:27:32,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-08 15:27:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 15:27:32,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:27:33,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-08 15:27:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 15:27:33,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901733282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:27:33,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:27:33,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 20] total 47 [2024-11-08 15:27:33,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087013275] [2024-11-08 15:27:33,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:27:33,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-08 15:27:33,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:27:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-08 15:27:33,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 15:27:33,649 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 47 states, 40 states have (on average 2.025) internal successors, (81), 36 states have internal predecessors, (81), 16 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-08 15:27:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:27:35,732 INFO L93 Difference]: Finished difference Result 117 states and 156 transitions. [2024-11-08 15:27:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-08 15:27:35,733 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 40 states have (on average 2.025) internal successors, (81), 36 states have internal predecessors, (81), 16 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) Word has length 50 [2024-11-08 15:27:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:27:35,735 INFO L225 Difference]: With dead ends: 117 [2024-11-08 15:27:35,735 INFO L226 Difference]: Without dead ends: 105 [2024-11-08 15:27:35,738 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=511, Invalid=5341, Unknown=0, NotChecked=0, Total=5852 [2024-11-08 15:27:35,738 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 263 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 15:27:35,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 371 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 15:27:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-08 15:27:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2024-11-08 15:27:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.25) internal successors, (75), 64 states have internal predecessors, (75), 16 states have call successors, (16), 8 states have call predecessors, (16), 11 states have return successors, (33), 15 states have call predecessors, (33), 12 states have call successors, (33) [2024-11-08 15:27:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 124 transitions. [2024-11-08 15:27:35,758 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 124 transitions. Word has length 50 [2024-11-08 15:27:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:27:35,759 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 124 transitions. [2024-11-08 15:27:35,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 40 states have (on average 2.025) internal successors, (81), 36 states have internal predecessors, (81), 16 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-08 15:27:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 124 transitions. [2024-11-08 15:27:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 15:27:35,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:35,762 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-11-08 15:27:35,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 15:27:35,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-08 15:27:35,963 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:35,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:35,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1121100986, now seen corresponding path program 1 times [2024-11-08 15:27:35,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:35,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468959134] [2024-11-08 15:27:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:35,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:36,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:36,460 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:36,465 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:36,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 15:27:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:36,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:36,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 15:27:36,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:27:36,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468959134] [2024-11-08 15:27:36,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468959134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:27:36,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325227164] [2024-11-08 15:27:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:36,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:36,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:27:36,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:27:36,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 15:27:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:36,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-08 15:27:36,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:27:36,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 15:27:36,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 15:27:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 15:27:36,963 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:27:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 15:27:37,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325227164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:27:37,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:27:37,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 21 [2024-11-08 15:27:37,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457261896] [2024-11-08 15:27:37,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:27:37,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 15:27:37,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:27:37,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 15:27:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-11-08 15:27:37,108 INFO L87 Difference]: Start difference. First operand 88 states and 124 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 13 states have internal predecessors, (48), 6 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-08 15:27:37,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:27:37,658 INFO L93 Difference]: Finished difference Result 126 states and 165 transitions. [2024-11-08 15:27:37,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 15:27:37,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 13 states have internal predecessors, (48), 6 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) Word has length 50 [2024-11-08 15:27:37,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:27:37,661 INFO L225 Difference]: With dead ends: 126 [2024-11-08 15:27:37,662 INFO L226 Difference]: Without dead ends: 107 [2024-11-08 15:27:37,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2024-11-08 15:27:37,664 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 15:27:37,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 168 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 15:27:37,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-08 15:27:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2024-11-08 15:27:37,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 69 states have internal predecessors, (81), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (32), 16 states have call predecessors, (32), 12 states have call successors, (32) [2024-11-08 15:27:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 130 transitions. [2024-11-08 15:27:37,689 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 130 transitions. Word has length 50 [2024-11-08 15:27:37,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:27:37,689 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 130 transitions. [2024-11-08 15:27:37,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 13 states have internal predecessors, (48), 6 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-08 15:27:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 130 transitions. [2024-11-08 15:27:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-08 15:27:37,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:37,692 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2024-11-08 15:27:37,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 15:27:37,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:37,893 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:37,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1563658441, now seen corresponding path program 2 times [2024-11-08 15:27:37,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:37,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135895320] [2024-11-08 15:27:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:37,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:38,440 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:38,572 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:38,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:38,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:38,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:38,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-08 15:27:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:38,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:38,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 15:27:38,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:27:38,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135895320] [2024-11-08 15:27:38,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135895320] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:27:38,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964279231] [2024-11-08 15:27:38,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 15:27:38,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:38,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:27:38,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:27:38,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 15:27:38,871 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 15:27:38,872 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:27:38,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-08 15:27:38,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:27:38,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 15:27:38,915 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 19 treesize of output 1 [2024-11-08 15:27:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-08 15:27:39,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:27:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-08 15:27:39,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964279231] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:27:39,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:27:39,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 44 [2024-11-08 15:27:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563251196] [2024-11-08 15:27:39,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:27:39,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-08 15:27:39,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:27:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-08 15:27:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1733, Unknown=0, NotChecked=0, Total=1892 [2024-11-08 15:27:39,794 INFO L87 Difference]: Start difference. First operand 95 states and 130 transitions. Second operand has 44 states, 37 states have (on average 2.054054054054054) internal successors, (76), 34 states have internal predecessors, (76), 15 states have call successors, (21), 7 states have call predecessors, (21), 12 states have return successors, (17), 16 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-08 15:27:40,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:27:40,899 INFO L93 Difference]: Finished difference Result 150 states and 208 transitions. [2024-11-08 15:27:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 15:27:40,900 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 37 states have (on average 2.054054054054054) internal successors, (76), 34 states have internal predecessors, (76), 15 states have call successors, (21), 7 states have call predecessors, (21), 12 states have return successors, (17), 16 states have call predecessors, (17), 11 states have call successors, (17) Word has length 62 [2024-11-08 15:27:40,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:27:40,906 INFO L225 Difference]: With dead ends: 150 [2024-11-08 15:27:40,906 INFO L226 Difference]: Without dead ends: 131 [2024-11-08 15:27:40,907 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=274, Invalid=3032, Unknown=0, NotChecked=0, Total=3306 [2024-11-08 15:27:40,909 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 15:27:40,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 381 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 15:27:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-08 15:27:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 105. [2024-11-08 15:27:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 77 states have internal predecessors, (93), 17 states have call successors, (17), 9 states have call predecessors, (17), 13 states have return successors, (39), 18 states have call predecessors, (39), 12 states have call successors, (39) [2024-11-08 15:27:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 149 transitions. [2024-11-08 15:27:40,936 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 149 transitions. Word has length 62 [2024-11-08 15:27:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:27:40,936 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 149 transitions. [2024-11-08 15:27:40,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 37 states have (on average 2.054054054054054) internal successors, (76), 34 states have internal predecessors, (76), 15 states have call successors, (21), 7 states have call predecessors, (21), 12 states have return successors, (17), 16 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-08 15:27:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 149 transitions. [2024-11-08 15:27:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-08 15:27:40,939 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:40,940 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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] [2024-11-08 15:27:40,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 15:27:41,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:41,140 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:41,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:41,141 INFO L85 PathProgramCache]: Analyzing trace with hash -448743200, now seen corresponding path program 2 times [2024-11-08 15:27:41,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:41,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338066303] [2024-11-08 15:27:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:41,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:41,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:41,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:41,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:41,779 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 15:27:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:41,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:41,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:41,799 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:41,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-08 15:27:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-08 15:27:41,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:27:41,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338066303] [2024-11-08 15:27:41,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338066303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:27:41,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627746531] [2024-11-08 15:27:41,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 15:27:41,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:41,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:27:41,807 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:27:41,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 15:27:41,920 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 15:27:41,921 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:27:41,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-08 15:27:41,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:27:41,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:27:41,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:27:41,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-08 15:27:41,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-08 15:27:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-08 15:27:42,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:27:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-08 15:27:42,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627746531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:27:42,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:27:42,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14] total 27 [2024-11-08 15:27:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934492772] [2024-11-08 15:27:42,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:27:42,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 15:27:42,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:27:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 15:27:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2024-11-08 15:27:42,819 INFO L87 Difference]: Start difference. First operand 105 states and 149 transitions. Second operand has 27 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 19 states have internal predecessors, (55), 9 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-08 15:27:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:27:43,583 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2024-11-08 15:27:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 15:27:43,583 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 19 states have internal predecessors, (55), 9 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) Word has length 63 [2024-11-08 15:27:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:27:43,585 INFO L225 Difference]: With dead ends: 228 [2024-11-08 15:27:43,586 INFO L226 Difference]: Without dead ends: 183 [2024-11-08 15:27:43,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 15:27:43,588 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 73 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 15:27:43,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 270 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 15:27:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-08 15:27:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 114. [2024-11-08 15:27:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 80 states have (on average 1.25) internal successors, (100), 83 states have internal predecessors, (100), 18 states have call successors, (18), 10 states have call predecessors, (18), 15 states have return successors, (45), 20 states have call predecessors, (45), 13 states have call successors, (45) [2024-11-08 15:27:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 163 transitions. [2024-11-08 15:27:43,622 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 163 transitions. Word has length 63 [2024-11-08 15:27:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:27:43,623 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 163 transitions. [2024-11-08 15:27:43,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 19 states have internal predecessors, (55), 9 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-08 15:27:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 163 transitions. [2024-11-08 15:27:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-08 15:27:43,628 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:43,628 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2024-11-08 15:27:43,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 15:27:43,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:43,829 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:43,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:43,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1539805773, now seen corresponding path program 3 times [2024-11-08 15:27:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:43,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389027429] [2024-11-08 15:27:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:44,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:45,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:45,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:45,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:45,061 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:45,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-08 15:27:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:45,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:45,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:45,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:45,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-08 15:27:45,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:27:45,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389027429] [2024-11-08 15:27:45,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389027429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:27:45,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600223183] [2024-11-08 15:27:45,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 15:27:45,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:45,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:27:45,502 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:27:45,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 15:27:45,680 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-08 15:27:45,681 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:27:45,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-08 15:27:45,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:27:45,710 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 15 treesize of output 1 [2024-11-08 15:27:45,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 15:27:46,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-08 15:27:46,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-08 15:27:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-08 15:27:46,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:27:47,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:27:47,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2024-11-08 15:27:47,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600223183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:27:47,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 15:27:47,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 47 [2024-11-08 15:27:47,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330389621] [2024-11-08 15:27:47,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 15:27:47,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-08 15:27:47,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:27:47,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-08 15:27:47,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3228, Unknown=0, NotChecked=0, Total=3422 [2024-11-08 15:27:47,715 INFO L87 Difference]: Start difference. First operand 114 states and 163 transitions. Second operand has 47 states, 38 states have (on average 1.763157894736842) internal successors, (67), 35 states have internal predecessors, (67), 15 states have call successors, (20), 7 states have call predecessors, (20), 11 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2024-11-08 15:27:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:27:49,775 INFO L93 Difference]: Finished difference Result 221 states and 364 transitions. [2024-11-08 15:27:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-08 15:27:49,776 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 38 states have (on average 1.763157894736842) internal successors, (67), 35 states have internal predecessors, (67), 15 states have call successors, (20), 7 states have call predecessors, (20), 11 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) Word has length 75 [2024-11-08 15:27:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:27:49,779 INFO L225 Difference]: With dead ends: 221 [2024-11-08 15:27:49,779 INFO L226 Difference]: Without dead ends: 219 [2024-11-08 15:27:49,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=502, Invalid=6980, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 15:27:49,781 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 85 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-08 15:27:49,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 507 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-08 15:27:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-08 15:27:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 159. [2024-11-08 15:27:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 113 states have (on average 1.247787610619469) internal successors, (141), 118 states have internal predecessors, (141), 22 states have call successors, (22), 12 states have call predecessors, (22), 23 states have return successors, (89), 28 states have call predecessors, (89), 14 states have call successors, (89) [2024-11-08 15:27:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 252 transitions. [2024-11-08 15:27:49,819 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 252 transitions. Word has length 75 [2024-11-08 15:27:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:27:49,819 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 252 transitions. [2024-11-08 15:27:49,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 38 states have (on average 1.763157894736842) internal successors, (67), 35 states have internal predecessors, (67), 15 states have call successors, (20), 7 states have call predecessors, (20), 11 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2024-11-08 15:27:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 252 transitions. [2024-11-08 15:27:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-08 15:27:49,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:49,822 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 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] [2024-11-08 15:27:49,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 15:27:50,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:50,027 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:50,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:50,027 INFO L85 PathProgramCache]: Analyzing trace with hash 817966526, now seen corresponding path program 1 times [2024-11-08 15:27:50,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:50,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354778378] [2024-11-08 15:27:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:50,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,171 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-08 15:27:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,508 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-08 15:27:51,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:27:51,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354778378] [2024-11-08 15:27:51,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354778378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:27:51,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946251123] [2024-11-08 15:27:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:51,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:51,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:27:51,763 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:27:51,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 15:27:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:51,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-08 15:27:51,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:27:51,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 15:27:51,976 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 19 treesize of output 1 [2024-11-08 15:27:53,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-08 15:27:53,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-08 15:27:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 15:27:53,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:27:54,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:27:54,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2024-11-08 15:27:54,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946251123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:27:54,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 15:27:54,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 55 [2024-11-08 15:27:54,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209477377] [2024-11-08 15:27:54,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 15:27:54,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-08 15:27:54,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:27:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-08 15:27:54,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=4468, Unknown=0, NotChecked=0, Total=4692 [2024-11-08 15:27:54,467 INFO L87 Difference]: Start difference. First operand 159 states and 252 transitions. Second operand has 55 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 39 states have internal predecessors, (74), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-08 15:27:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:27:57,405 INFO L93 Difference]: Finished difference Result 347 states and 622 transitions. [2024-11-08 15:27:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-08 15:27:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 39 states have internal predecessors, (74), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) Word has length 76 [2024-11-08 15:27:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:27:57,409 INFO L225 Difference]: With dead ends: 347 [2024-11-08 15:27:57,409 INFO L226 Difference]: Without dead ends: 226 [2024-11-08 15:27:57,413 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=576, Invalid=9524, Unknown=0, NotChecked=0, Total=10100 [2024-11-08 15:27:57,414 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 73 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-08 15:27:57,414 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 476 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-08 15:27:57,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-08 15:27:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 175. [2024-11-08 15:27:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 126 states have (on average 1.2380952380952381) internal successors, (156), 129 states have internal predecessors, (156), 23 states have call successors, (23), 12 states have call predecessors, (23), 25 states have return successors, (103), 33 states have call predecessors, (103), 15 states have call successors, (103) [2024-11-08 15:27:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 282 transitions. [2024-11-08 15:27:57,446 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 282 transitions. Word has length 76 [2024-11-08 15:27:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:27:57,448 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 282 transitions. [2024-11-08 15:27:57,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 39 states have internal predecessors, (74), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-08 15:27:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 282 transitions. [2024-11-08 15:27:57,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-08 15:27:57,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:57,450 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 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] [2024-11-08 15:27:57,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 15:27:57,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:57,651 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:57,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1714423632, now seen corresponding path program 2 times [2024-11-08 15:27:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:57,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972416397] [2024-11-08 15:27:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:57,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:57,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:57,782 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:57,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:57,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:57,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-08 15:27:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:57,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:57,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:57,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:27:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:57,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:27:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:27:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 15:27:57,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:27:57,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972416397] [2024-11-08 15:27:57,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972416397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:27:57,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824108675] [2024-11-08 15:27:57,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 15:27:57,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:27:57,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:27:57,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:27:57,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 15:27:58,113 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 15:27:58,114 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:27:58,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 15:27:58,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:27:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 15:27:58,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:27:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 15:27:58,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824108675] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:27:58,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:27:58,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2024-11-08 15:27:58,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670494002] [2024-11-08 15:27:58,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:27:58,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 15:27:58,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:27:58,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 15:27:58,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2024-11-08 15:27:58,534 INFO L87 Difference]: Start difference. First operand 175 states and 282 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-08 15:27:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:27:59,106 INFO L93 Difference]: Finished difference Result 346 states and 642 transitions. [2024-11-08 15:27:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 15:27:59,107 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 76 [2024-11-08 15:27:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:27:59,110 INFO L225 Difference]: With dead ends: 346 [2024-11-08 15:27:59,110 INFO L226 Difference]: Without dead ends: 209 [2024-11-08 15:27:59,113 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 155 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=1342, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 15:27:59,114 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 15:27:59,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 211 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 15:27:59,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-08 15:27:59,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2024-11-08 15:27:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 138 states have (on average 1.2028985507246377) internal successors, (166), 141 states have internal predecessors, (166), 23 states have call successors, (23), 12 states have call predecessors, (23), 29 states have return successors, (124), 37 states have call predecessors, (124), 15 states have call successors, (124) [2024-11-08 15:27:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 313 transitions. [2024-11-08 15:27:59,146 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 313 transitions. Word has length 76 [2024-11-08 15:27:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:27:59,147 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 313 transitions. [2024-11-08 15:27:59,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-08 15:27:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 313 transitions. [2024-11-08 15:27:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-08 15:27:59,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:27:59,149 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-08 15:27:59,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 15:27:59,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 15:27:59,350 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:27:59,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:27:59,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1380137023, now seen corresponding path program 1 times [2024-11-08 15:27:59,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:27:59,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726141886] [2024-11-08 15:27:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:27:59,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:27:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:28:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:28:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-08 15:28:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:28:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,780 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:28:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-08 15:28:00,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:28:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726141886] [2024-11-08 15:28:00,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726141886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:28:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158820924] [2024-11-08 15:28:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:28:00,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:28:00,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:28:00,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:28:00,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 15:28:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:00,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-08 15:28:00,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:28:00,990 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 19 treesize of output 1 [2024-11-08 15:28:00,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 15:28:02,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:28:02,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2024-11-08 15:28:02,367 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-08 15:28:02,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-11-08 15:28:02,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-08 15:28:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-08 15:28:02,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:28:03,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:28:03,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2024-11-08 15:28:04,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158820924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:28:04,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 15:28:04,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 34] total 60 [2024-11-08 15:28:04,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934749866] [2024-11-08 15:28:04,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 15:28:04,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-08 15:28:04,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:28:04,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-08 15:28:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=5441, Unknown=0, NotChecked=0, Total=5700 [2024-11-08 15:28:04,294 INFO L87 Difference]: Start difference. First operand 191 states and 313 transitions. Second operand has 60 states, 50 states have (on average 1.54) internal successors, (77), 43 states have internal predecessors, (77), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-08 15:28:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:28:07,939 INFO L93 Difference]: Finished difference Result 251 states and 408 transitions. [2024-11-08 15:28:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-08 15:28:07,940 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 50 states have (on average 1.54) internal successors, (77), 43 states have internal predecessors, (77), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) Word has length 77 [2024-11-08 15:28:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:28:07,943 INFO L225 Difference]: With dead ends: 251 [2024-11-08 15:28:07,943 INFO L226 Difference]: Without dead ends: 249 [2024-11-08 15:28:07,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=697, Invalid=12875, Unknown=0, NotChecked=0, Total=13572 [2024-11-08 15:28:07,948 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-08 15:28:07,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 448 Invalid, 2657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-08 15:28:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-08 15:28:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 192. [2024-11-08 15:28:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.20863309352518) internal successors, (168), 142 states have internal predecessors, (168), 23 states have call successors, (23), 12 states have call predecessors, (23), 29 states have return successors, (124), 37 states have call predecessors, (124), 15 states have call successors, (124) [2024-11-08 15:28:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 315 transitions. [2024-11-08 15:28:07,986 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 315 transitions. Word has length 77 [2024-11-08 15:28:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:28:07,986 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 315 transitions. [2024-11-08 15:28:07,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 50 states have (on average 1.54) internal successors, (77), 43 states have internal predecessors, (77), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-08 15:28:07,987 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 315 transitions. [2024-11-08 15:28:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-08 15:28:07,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:28:07,989 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2024-11-08 15:28:08,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 15:28:08,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:28:08,190 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:28:08,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:28:08,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1407278464, now seen corresponding path program 1 times [2024-11-08 15:28:08,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:28:08,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240400170] [2024-11-08 15:28:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:28:08,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:28:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,099 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:28:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:28:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-08 15:28:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:28:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:28:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 15:28:09,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:28:09,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240400170] [2024-11-08 15:28:09,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240400170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:28:09,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650782070] [2024-11-08 15:28:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:28:09,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:28:09,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:28:09,630 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:28:09,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 15:28:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:09,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-08 15:28:09,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:28:09,815 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 19 treesize of output 1 [2024-11-08 15:28:09,817 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 19 treesize of output 1 [2024-11-08 15:28:10,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 15:28:10,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-11-08 15:28:10,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2024-11-08 15:28:10,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 15:28:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-08 15:28:10,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:28:10,939 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2024-11-08 15:28:10,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-08 15:28:11,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650782070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:28:11,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 15:28:11,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 45 [2024-11-08 15:28:11,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685046825] [2024-11-08 15:28:11,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 15:28:11,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-08 15:28:11,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:28:11,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-08 15:28:11,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2925, Unknown=0, NotChecked=0, Total=3080 [2024-11-08 15:28:11,287 INFO L87 Difference]: Start difference. First operand 192 states and 315 transitions. Second operand has 45 states, 37 states have (on average 1.864864864864865) internal successors, (69), 34 states have internal predecessors, (69), 15 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-08 15:28:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 15:28:13,173 INFO L93 Difference]: Finished difference Result 373 states and 616 transitions. [2024-11-08 15:28:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-08 15:28:13,174 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 37 states have (on average 1.864864864864865) internal successors, (69), 34 states have internal predecessors, (69), 15 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) Word has length 77 [2024-11-08 15:28:13,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 15:28:13,177 INFO L225 Difference]: With dead ends: 373 [2024-11-08 15:28:13,177 INFO L226 Difference]: Without dead ends: 371 [2024-11-08 15:28:13,178 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=361, Invalid=6281, Unknown=0, NotChecked=0, Total=6642 [2024-11-08 15:28:13,179 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 15:28:13,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 466 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 15:28:13,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-11-08 15:28:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 186. [2024-11-08 15:28:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 136 states have (on average 1.213235294117647) internal successors, (165), 136 states have internal predecessors, (165), 23 states have call successors, (23), 12 states have call predecessors, (23), 26 states have return successors, (109), 37 states have call predecessors, (109), 15 states have call successors, (109) [2024-11-08 15:28:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 297 transitions. [2024-11-08 15:28:13,216 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 297 transitions. Word has length 77 [2024-11-08 15:28:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 15:28:13,217 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 297 transitions. [2024-11-08 15:28:13,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 37 states have (on average 1.864864864864865) internal successors, (69), 34 states have internal predecessors, (69), 15 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-08 15:28:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 297 transitions. [2024-11-08 15:28:13,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-08 15:28:13,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 15:28:13,219 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2024-11-08 15:28:13,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 15:28:13,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 15:28:13,424 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 15:28:13,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 15:28:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash 983013763, now seen corresponding path program 3 times [2024-11-08 15:28:13,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 15:28:13,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214122244] [2024-11-08 15:28:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 15:28:13,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 15:28:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:13,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:14,271 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:14,320 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:28:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:14,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:14,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:28:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:14,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-08 15:28:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:14,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:14,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 15:28:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:14,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 15:28:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:14,879 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-08 15:28:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 15:28:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-08 15:28:14,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 15:28:14,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214122244] [2024-11-08 15:28:14,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214122244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 15:28:14,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366707594] [2024-11-08 15:28:14,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 15:28:14,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 15:28:14,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 15:28:14,884 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 15:28:14,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 15:28:15,073 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 15:28:15,073 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 15:28:15,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 15:28:15,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 15:28:15,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-08 15:28:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 15:28:23,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 15:28:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 15:28:23,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366707594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 15:28:23,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 15:28:23,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 13] total 39 [2024-11-08 15:28:23,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547984721] [2024-11-08 15:28:23,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 15:28:23,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 15:28:23,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 15:28:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 15:28:23,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1369, Unknown=2, NotChecked=0, Total=1482 [2024-11-08 15:28:23,850 INFO L87 Difference]: Start difference. First operand 186 states and 297 transitions. Second operand has 39 states, 33 states have (on average 2.393939393939394) internal successors, (79), 30 states have internal predecessors, (79), 14 states have call successors, (25), 6 states have call predecessors, (25), 12 states have return successors, (21), 16 states have call predecessors, (21), 12 states have call successors, (21) [2024-11-08 15:28:27,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 15:28:35,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 15:28:39,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 15:28:48,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]