./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 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 02:17:30,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 02:17:30,705 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 02:17:30,710 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 02:17:30,711 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 02:17:30,735 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 02:17:30,736 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 02:17:30,737 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 02:17:30,737 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 02:17:30,737 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 02:17:30,738 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 02:17:30,738 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 02:17:30,738 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 02:17:30,739 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 02:17:30,739 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 02:17:30,739 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 02:17:30,739 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 02:17:30,740 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 02:17:30,740 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 02:17:30,740 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 02:17:30,740 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 02:17:30,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 02:17:30,747 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 02:17:30,747 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 02:17:30,748 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 02:17:30,748 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 02:17:30,748 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 02:17:30,748 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 02:17:30,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 02:17:30,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 02:17:30,748 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 02:17:30,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 02:17:30,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:17:30,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 02:17:30,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 02:17:30,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 02:17:30,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 02:17:30,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 02:17:30,749 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 02:17:30,750 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 02:17:30,750 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 02:17:30,751 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 02:17:30,751 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2024-11-22 02:17:30,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 02:17:30,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 02:17:30,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 02:17:30,976 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 02:17:30,976 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 02:17:30,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2024-11-22 02:17:32,249 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 02:17:32,402 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 02:17:32,403 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2024-11-22 02:17:32,414 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bef2a1e4/1d91cf8ba1d240d788b182851df7f788/FLAGd89f0e66d [2024-11-22 02:17:32,425 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bef2a1e4/1d91cf8ba1d240d788b182851df7f788 [2024-11-22 02:17:32,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 02:17:32,428 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 02:17:32,428 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 02:17:32,429 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 02:17:32,435 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 02:17:32,435 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,436 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@747cdd9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32, skipping insertion in model container [2024-11-22 02:17:32,436 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,453 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 02:17:32,593 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] [2024-11-22 02:17:32,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:17:32,622 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 02:17:32,630 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] [2024-11-22 02:17:32,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:17:32,652 INFO L204 MainTranslator]: Completed translation [2024-11-22 02:17:32,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32 WrapperNode [2024-11-22 02:17:32,652 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 02:17:32,653 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 02:17:32,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 02:17:32,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 02:17:32,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,665 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,679 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 39 [2024-11-22 02:17:32,680 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 02:17:32,681 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 02:17:32,681 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 02:17:32,681 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 02:17:32,689 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,695 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,715 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]. [2024-11-22 02:17:32,716 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,716 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,723 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,729 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,732 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,734 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 02:17:32,739 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 02:17:32,739 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 02:17:32,739 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 02:17:32,740 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (1/1) ... [2024-11-22 02:17:32,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:17:32,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:32,772 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) [2024-11-22 02:17:32,774 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 [2024-11-22 02:17:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-22 02:17:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-22 02:17:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 02:17:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure max [2024-11-22 02:17:32,825 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2024-11-22 02:17:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2024-11-22 02:17:32,825 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2024-11-22 02:17:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 02:17:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 02:17:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-11-22 02:17:32,826 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-11-22 02:17:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-22 02:17:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-22 02:17:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 02:17:32,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 02:17:32,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 02:17:32,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 02:17:32,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 02:17:32,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 02:17:32,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 02:17:32,910 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 02:17:32,912 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 02:17:33,054 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-11-22 02:17:33,054 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 02:17:33,065 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 02:17:33,066 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-22 02:17:33,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:17:33 BoogieIcfgContainer [2024-11-22 02:17:33,066 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 02:17:33,068 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 02:17:33,069 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 02:17:33,071 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 02:17:33,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:17:32" (1/3) ... [2024-11-22 02:17:33,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efb2fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:17:33, skipping insertion in model container [2024-11-22 02:17:33,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:32" (2/3) ... [2024-11-22 02:17:33,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efb2fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:17:33, skipping insertion in model container [2024-11-22 02:17:33,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:17:33" (3/3) ... [2024-11-22 02:17:33,073 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2024-11-22 02:17:33,087 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 02:17:33,087 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 02:17:33,158 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 02:17:33,164 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;@385b8715, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 02:17:33,164 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 02:17:33,172 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) [2024-11-22 02:17:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-22 02:17:33,193 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:33,194 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:17:33,194 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:33,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:33,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1128634237, now seen corresponding path program 1 times [2024-11-22 02:17:33,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:33,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88142634] [2024-11-22 02:17:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:33,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:17:33,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:33,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88142634] [2024-11-22 02:17:33,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88142634] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:17:33,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:17:33,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 02:17:33,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921226910] [2024-11-22 02:17:33,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:17:33,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 02:17:33,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:33,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 02:17:33,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-22 02:17:33,628 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 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 02:17:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:33,709 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2024-11-22 02:17:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 02:17:33,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 [2024-11-22 02:17:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:33,718 INFO L225 Difference]: With dead ends: 70 [2024-11-22 02:17:33,718 INFO L226 Difference]: Without dead ends: 36 [2024-11-22 02:17:33,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-22 02:17:33,723 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:33,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 284 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 02:17:33,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-22 02:17:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-22 02:17:33,751 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) [2024-11-22 02:17:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-11-22 02:17:33,754 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 19 [2024-11-22 02:17:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:33,754 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-11-22 02:17:33,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 02:17:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-11-22 02:17:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-22 02:17:33,757 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:33,757 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] [2024-11-22 02:17:33,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 02:17:33,758 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:33,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:33,758 INFO L85 PathProgramCache]: Analyzing trace with hash 92344634, now seen corresponding path program 1 times [2024-11-22 02:17:33,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:33,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794147983] [2024-11-22 02:17:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:33,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 02:17:33,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:33,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794147983] [2024-11-22 02:17:33,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794147983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:17:33,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:17:33,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-22 02:17:33,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097587838] [2024-11-22 02:17:33,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:17:33,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 02:17:33,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 02:17:33,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-22 02:17:33,927 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 02:17:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:33,985 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-11-22 02:17:33,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 02:17:33,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 2 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 [2024-11-22 02:17:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:33,988 INFO L225 Difference]: With dead ends: 49 [2024-11-22 02:17:33,988 INFO L226 Difference]: Without dead ends: 38 [2024-11-22 02:17:33,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-22 02:17:33,990 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:33,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 243 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 02:17:33,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-22 02:17:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-22 02:17:34,000 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) [2024-11-22 02:17:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2024-11-22 02:17:34,003 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 31 [2024-11-22 02:17:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:34,004 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2024-11-22 02:17:34,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 02:17:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2024-11-22 02:17:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-22 02:17:34,005 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:34,006 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] [2024-11-22 02:17:34,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 02:17:34,006 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:34,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:34,007 INFO L85 PathProgramCache]: Analyzing trace with hash 962263030, now seen corresponding path program 1 times [2024-11-22 02:17:34,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:34,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385330060] [2024-11-22 02:17:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:34,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 02:17:34,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:34,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385330060] [2024-11-22 02:17:34,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385330060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:34,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906815139] [2024-11-22 02:17:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:34,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:34,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:34,708 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) [2024-11-22 02:17:34,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 02:17:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:34,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-22 02:17:34,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:35,078 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 [2024-11-22 02:17:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 02:17:35,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:35,303 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-22 02:17:35,304 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-22 02:17:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 02:17:35,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906815139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:17:35,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:17:35,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2024-11-22 02:17:35,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944432605] [2024-11-22 02:17:35,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:35,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 02:17:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 02:17:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2024-11-22 02:17:35,339 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-22 02:17:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:35,786 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2024-11-22 02:17:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 02:17:35,786 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 44 [2024-11-22 02:17:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:35,787 INFO L225 Difference]: With dead ends: 47 [2024-11-22 02:17:35,787 INFO L226 Difference]: Without dead ends: 45 [2024-11-22 02:17:35,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2024-11-22 02:17:35,788 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:35,789 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 187 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 02:17:35,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-22 02:17:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2024-11-22 02:17:35,797 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) [2024-11-22 02:17:35,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-11-22 02:17:35,800 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 44 [2024-11-22 02:17:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:35,800 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-11-22 02:17:35,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-22 02:17:35,800 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-11-22 02:17:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-22 02:17:35,802 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:35,802 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] [2024-11-22 02:17:35,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 02:17:36,003 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 [2024-11-22 02:17:36,003 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:36,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:36,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1004737340, now seen corresponding path program 1 times [2024-11-22 02:17:36,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:36,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168517860] [2024-11-22 02:17:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:36,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 02:17:36,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:36,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168517860] [2024-11-22 02:17:36,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168517860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:36,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052207593] [2024-11-22 02:17:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:36,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:36,550 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) [2024-11-22 02:17:36,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 02:17:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:36,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-22 02:17:36,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:36,693 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 [2024-11-22 02:17:36,697 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 [2024-11-22 02:17:36,775 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 [2024-11-22 02:17:36,781 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 29 treesize of output 13 [2024-11-22 02:17:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 02:17:37,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 02:17:37,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052207593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:17:37,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:17:37,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 14] total 29 [2024-11-22 02:17:37,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308821395] [2024-11-22 02:17:37,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:37,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-22 02:17:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-22 02:17:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2024-11-22 02:17:37,439 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 29 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-22 02:17:38,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:38,637 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2024-11-22 02:17:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-22 02:17:38,638 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) Word has length 50 [2024-11-22 02:17:38,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:38,640 INFO L225 Difference]: With dead ends: 114 [2024-11-22 02:17:38,640 INFO L226 Difference]: Without dead ends: 100 [2024-11-22 02:17:38,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=2581, Unknown=0, NotChecked=0, Total=2862 [2024-11-22 02:17:38,641 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 103 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:38,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 355 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-22 02:17:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-22 02:17:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2024-11-22 02:17:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 63 states have internal predecessors, (74), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (35), 16 states have call predecessors, (35), 13 states have call successors, (35) [2024-11-22 02:17:38,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2024-11-22 02:17:38,656 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 50 [2024-11-22 02:17:38,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:38,657 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2024-11-22 02:17:38,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (18), 7 states have call predecessors, (18), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-22 02:17:38,657 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2024-11-22 02:17:38,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-22 02:17:38,659 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:38,659 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] [2024-11-22 02:17:38,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 02:17:38,862 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 [2024-11-22 02:17:38,863 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:38,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:38,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1121100986, now seen corresponding path program 1 times [2024-11-22 02:17:38,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:38,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149197060] [2024-11-22 02:17:38,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:38,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 02:17:39,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:39,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149197060] [2024-11-22 02:17:39,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149197060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:39,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167067655] [2024-11-22 02:17:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:39,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:39,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:39,205 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) [2024-11-22 02:17:39,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 02:17:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:39,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-22 02:17:39,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:39,308 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 [2024-11-22 02:17:39,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-22 02:17:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 02:17:39,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 02:17:39,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167067655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:17:39,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:17:39,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 20 [2024-11-22 02:17:39,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570042783] [2024-11-22 02:17:39,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:39,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 02:17:39,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:39,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 02:17:39,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-11-22 02:17:39,685 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-22 02:17:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:39,973 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2024-11-22 02:17:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 02:17:39,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) Word has length 50 [2024-11-22 02:17:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:39,975 INFO L225 Difference]: With dead ends: 150 [2024-11-22 02:17:39,975 INFO L226 Difference]: Without dead ends: 107 [2024-11-22 02:17:39,976 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-22 02:17:39,976 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:39,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 489 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:17:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-22 02:17:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2024-11-22 02:17:39,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 68 states have internal predecessors, (80), 17 states have call successors, (17), 8 states have call predecessors, (17), 11 states have return successors, (35), 18 states have call predecessors, (35), 12 states have call successors, (35) [2024-11-22 02:17:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 132 transitions. [2024-11-22 02:17:39,999 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 132 transitions. Word has length 50 [2024-11-22 02:17:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:39,999 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 132 transitions. [2024-11-22 02:17:39,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-22 02:17:39,999 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 132 transitions. [2024-11-22 02:17:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-22 02:17:40,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:40,005 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] [2024-11-22 02:17:40,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 02:17:40,205 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 [2024-11-22 02:17:40,206 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:40,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:40,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1563658441, now seen corresponding path program 2 times [2024-11-22 02:17:40,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:40,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961236256] [2024-11-22 02:17:40,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:17:40,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:40,237 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:17:40,238 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:17:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-22 02:17:40,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:40,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961236256] [2024-11-22 02:17:40,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961236256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:40,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195528641] [2024-11-22 02:17:40,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:17:40,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:40,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:40,834 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) [2024-11-22 02:17:40,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 02:17:40,914 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:17:40,914 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:17:40,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-22 02:17:40,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:40,946 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 [2024-11-22 02:17:40,947 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 [2024-11-22 02:17:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-22 02:17:41,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-22 02:17:41,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195528641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:17:41,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:17:41,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 43 [2024-11-22 02:17:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984312836] [2024-11-22 02:17:41,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:41,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-22 02:17:41,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-22 02:17:41,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2024-11-22 02:17:41,747 INFO L87 Difference]: Start difference. First operand 95 states and 132 transitions. Second operand has 43 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 34 states have internal predecessors, (75), 15 states have call successors, (18), 6 states have call predecessors, (18), 12 states have return successors, (17), 16 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-22 02:17:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:42,233 INFO L93 Difference]: Finished difference Result 149 states and 207 transitions. [2024-11-22 02:17:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-22 02:17:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 34 states have internal predecessors, (75), 15 states have call successors, (18), 6 states have call predecessors, (18), 12 states have return successors, (17), 16 states have call predecessors, (17), 11 states have call successors, (17) Word has length 62 [2024-11-22 02:17:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:42,237 INFO L225 Difference]: With dead ends: 149 [2024-11-22 02:17:42,237 INFO L226 Difference]: Without dead ends: 130 [2024-11-22 02:17:42,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=204, Invalid=2246, Unknown=0, NotChecked=0, Total=2450 [2024-11-22 02:17:42,241 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:42,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 739 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 02:17:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-22 02:17:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2024-11-22 02:17:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 76 states have internal predecessors, (92), 17 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (42), 20 states have call predecessors, (42), 12 states have call successors, (42) [2024-11-22 02:17:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2024-11-22 02:17:42,257 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 62 [2024-11-22 02:17:42,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:42,257 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2024-11-22 02:17:42,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 34 states have internal predecessors, (75), 15 states have call successors, (18), 6 states have call predecessors, (18), 12 states have return successors, (17), 16 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-22 02:17:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2024-11-22 02:17:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-22 02:17:42,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:42,259 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] [2024-11-22 02:17:42,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 02:17:42,461 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 [2024-11-22 02:17:42,462 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:42,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:42,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1539805773, now seen corresponding path program 3 times [2024-11-22 02:17:42,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:42,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042168590] [2024-11-22 02:17:42,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:17:42,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:42,494 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-22 02:17:42,495 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:17:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 02:17:43,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:43,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042168590] [2024-11-22 02:17:43,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042168590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:43,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765758992] [2024-11-22 02:17:43,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:17:43,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:43,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:43,877 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) [2024-11-22 02:17:43,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 02:17:43,985 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-22 02:17:43,986 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:17:43,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-22 02:17:43,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:44,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-22 02:17:44,041 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 [2024-11-22 02:17:44,057 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 [2024-11-22 02:17:44,109 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 [2024-11-22 02:17:44,146 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 02:17:44,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-22 02:17:44,190 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 [2024-11-22 02:17:44,195 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 15 treesize of output 1 [2024-11-22 02:17:44,196 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 [2024-11-22 02:17:45,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:17:45,364 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 37 treesize of output 29 [2024-11-22 02:17:45,373 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 02:17:45,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 02:17:45,500 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 [2024-11-22 02:17:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 57 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-22 02:17:45,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-22 02:17:46,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765758992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:17:46,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:17:46,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 22] total 72 [2024-11-22 02:17:46,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085375102] [2024-11-22 02:17:46,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:46,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-22 02:17:46,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:46,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-22 02:17:46,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4869, Unknown=0, NotChecked=0, Total=5112 [2024-11-22 02:17:46,712 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 72 states, 60 states have (on average 1.7833333333333334) internal successors, (107), 55 states have internal predecessors, (107), 22 states have call successors, (28), 8 states have call predecessors, (28), 20 states have return successors, (27), 23 states have call predecessors, (27), 18 states have call successors, (27) [2024-11-22 02:17:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:50,994 INFO L93 Difference]: Finished difference Result 316 states and 504 transitions. [2024-11-22 02:17:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-22 02:17:50,995 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 60 states have (on average 1.7833333333333334) internal successors, (107), 55 states have internal predecessors, (107), 22 states have call successors, (28), 8 states have call predecessors, (28), 20 states have return successors, (27), 23 states have call predecessors, (27), 18 states have call successors, (27) Word has length 75 [2024-11-22 02:17:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:50,997 INFO L225 Difference]: With dead ends: 316 [2024-11-22 02:17:50,997 INFO L226 Difference]: Without dead ends: 314 [2024-11-22 02:17:51,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 120 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4306 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1067, Invalid=15189, Unknown=0, NotChecked=0, Total=16256 [2024-11-22 02:17:51,001 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 5274 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 5381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 5274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:51,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 965 Invalid, 5381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 5274 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-22 02:17:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2024-11-22 02:17:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 200. [2024-11-22 02:17:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 142 states have (on average 1.2746478873239437) internal successors, (181), 150 states have internal predecessors, (181), 25 states have call successors, (25), 11 states have call predecessors, (25), 32 states have return successors, (127), 38 states have call predecessors, (127), 17 states have call successors, (127) [2024-11-22 02:17:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 333 transitions. [2024-11-22 02:17:51,044 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 333 transitions. Word has length 75 [2024-11-22 02:17:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:51,045 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 333 transitions. [2024-11-22 02:17:51,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 60 states have (on average 1.7833333333333334) internal successors, (107), 55 states have internal predecessors, (107), 22 states have call successors, (28), 8 states have call predecessors, (28), 20 states have return successors, (27), 23 states have call predecessors, (27), 18 states have call successors, (27) [2024-11-22 02:17:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 333 transitions. [2024-11-22 02:17:51,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-22 02:17:51,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:51,046 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] [2024-11-22 02:17:51,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 02:17:51,247 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 [2024-11-22 02:17:51,247 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:51,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:51,248 INFO L85 PathProgramCache]: Analyzing trace with hash 817966526, now seen corresponding path program 1 times [2024-11-22 02:17:51,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:51,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409533309] [2024-11-22 02:17:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:51,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 18 proven. 52 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-22 02:17:52,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:52,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409533309] [2024-11-22 02:17:52,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409533309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:52,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525329781] [2024-11-22 02:17:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:52,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:52,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:52,547 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) [2024-11-22 02:17:52,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 02:17:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:17:52,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-22 02:17:52,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:52,722 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 [2024-11-22 02:17:52,727 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 [2024-11-22 02:17:53,685 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 [2024-11-22 02:17:53,811 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 [2024-11-22 02:17:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-22 02:17:53,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:54,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:17:54,544 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 [2024-11-22 02:17:54,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525329781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:54,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 02:17:54,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 57 [2024-11-22 02:17:54,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108873538] [2024-11-22 02:17:54,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:54,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-22 02:17:54,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:54,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-22 02:17:54,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=4752, Unknown=0, NotChecked=0, Total=4970 [2024-11-22 02:17:54,859 INFO L87 Difference]: Start difference. First operand 200 states and 333 transitions. Second operand has 57 states, 48 states have (on average 1.75) internal successors, (84), 42 states have internal predecessors, (84), 18 states have call successors, (23), 8 states have call predecessors, (23), 15 states have return successors, (20), 18 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-22 02:17:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:58,285 INFO L93 Difference]: Finished difference Result 549 states and 1048 transitions. [2024-11-22 02:17:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-22 02:17:58,286 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 48 states have (on average 1.75) internal successors, (84), 42 states have internal predecessors, (84), 18 states have call successors, (23), 8 states have call predecessors, (23), 15 states have return successors, (20), 18 states have call predecessors, (20), 14 states have call successors, (20) Word has length 76 [2024-11-22 02:17:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:58,289 INFO L225 Difference]: With dead ends: 549 [2024-11-22 02:17:58,289 INFO L226 Difference]: Without dead ends: 383 [2024-11-22 02:17:58,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2832 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=794, Invalid=13248, Unknown=0, NotChecked=0, Total=14042 [2024-11-22 02:17:58,293 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 119 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 3087 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:58,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 426 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3087 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-22 02:17:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-11-22 02:17:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 272. [2024-11-22 02:17:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 195 states have (on average 1.2717948717948717) internal successors, (248), 206 states have internal predecessors, (248), 27 states have call successors, (27), 11 states have call predecessors, (27), 49 states have return successors, (222), 54 states have call predecessors, (222), 19 states have call successors, (222) [2024-11-22 02:17:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 497 transitions. [2024-11-22 02:17:58,336 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 497 transitions. Word has length 76 [2024-11-22 02:17:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:58,337 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 497 transitions. [2024-11-22 02:17:58,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 48 states have (on average 1.75) internal successors, (84), 42 states have internal predecessors, (84), 18 states have call successors, (23), 8 states have call predecessors, (23), 15 states have return successors, (20), 18 states have call predecessors, (20), 14 states have call successors, (20) [2024-11-22 02:17:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 497 transitions. [2024-11-22 02:17:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-22 02:17:58,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:58,339 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] [2024-11-22 02:17:58,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 02:17:58,539 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 [2024-11-22 02:17:58,540 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:58,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1714423632, now seen corresponding path program 2 times [2024-11-22 02:17:58,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:58,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531122064] [2024-11-22 02:17:58,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:17:58,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:58,556 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:17:58,559 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:17:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-22 02:17:58,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:58,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531122064] [2024-11-22 02:17:58,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531122064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:58,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999450332] [2024-11-22 02:17:58,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:17:58,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:58,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:58,699 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) [2024-11-22 02:17:58,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 02:17:58,805 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:17:58,805 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:17:58,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 02:17:58,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-22 02:17:58,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-22 02:17:59,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999450332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:17:59,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:17:59,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 20 [2024-11-22 02:17:59,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622030943] [2024-11-22 02:17:59,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:59,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 02:17:59,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:59,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 02:17:59,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2024-11-22 02:17:59,232 INFO L87 Difference]: Start difference. First operand 272 states and 497 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-22 02:17:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:59,432 INFO L93 Difference]: Finished difference Result 551 states and 1168 transitions. [2024-11-22 02:17:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 02:17:59,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 76 [2024-11-22 02:17:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:59,436 INFO L225 Difference]: With dead ends: 551 [2024-11-22 02:17:59,436 INFO L226 Difference]: Without dead ends: 313 [2024-11-22 02:17:59,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 133 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 02:17:59,439 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:59,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 508 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:17:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-11-22 02:17:59,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 290. [2024-11-22 02:17:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 210 states have (on average 1.2142857142857142) internal successors, (255), 218 states have internal predecessors, (255), 27 states have call successors, (27), 11 states have call predecessors, (27), 52 states have return successors, (239), 60 states have call predecessors, (239), 19 states have call successors, (239) [2024-11-22 02:17:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 521 transitions. [2024-11-22 02:17:59,472 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 521 transitions. Word has length 76 [2024-11-22 02:17:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:59,472 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 521 transitions. [2024-11-22 02:17:59,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-22 02:17:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 521 transitions. [2024-11-22 02:17:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-22 02:17:59,474 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:59,474 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] [2024-11-22 02:17:59,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 02:17:59,678 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 [2024-11-22 02:17:59,679 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:59,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1380137023, now seen corresponding path program 1 times [2024-11-22 02:17:59,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:59,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876428029] [2024-11-22 02:17:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:17:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:18:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-22 02:18:00,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:18:00,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876428029] [2024-11-22 02:18:00,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876428029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:18:00,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718717696] [2024-11-22 02:18:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:18:00,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:18:00,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:18:00,553 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) [2024-11-22 02:18:00,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 02:18:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:18:00,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-22 02:18:00,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:18:00,691 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 [2024-11-22 02:18:00,693 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 [2024-11-22 02:18:01,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:18:01,863 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 [2024-11-22 02:18:01,872 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-22 02:18:01,872 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 [2024-11-22 02:18:01,993 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 [2024-11-22 02:18:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-22 02:18:02,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:18:02,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:18:02,830 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 [2024-11-22 02:18:03,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718717696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:18:03,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 02:18:03,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 34] total 57 [2024-11-22 02:18:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500028490] [2024-11-22 02:18:03,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 02:18:03,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-22 02:18:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:18:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-22 02:18:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=5015, Unknown=0, NotChecked=0, Total=5256 [2024-11-22 02:18:03,459 INFO L87 Difference]: Start difference. First operand 290 states and 521 transitions. Second operand has 57 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 41 states have internal predecessors, (75), 16 states have call successors, (19), 6 states have call predecessors, (19), 11 states have return successors, (16), 15 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-22 02:18:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:18:05,889 INFO L93 Difference]: Finished difference Result 502 states and 885 transitions. [2024-11-22 02:18:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-22 02:18:05,889 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 41 states have internal predecessors, (75), 16 states have call successors, (19), 6 states have call predecessors, (19), 11 states have return successors, (16), 15 states have call predecessors, (16), 12 states have call successors, (16) Word has length 77 [2024-11-22 02:18:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:18:05,892 INFO L225 Difference]: With dead ends: 502 [2024-11-22 02:18:05,893 INFO L226 Difference]: Without dead ends: 500 [2024-11-22 02:18:05,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=598, Invalid=12284, Unknown=0, NotChecked=0, Total=12882 [2024-11-22 02:18:05,895 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 70 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-22 02:18:05,895 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1068 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2121 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-22 02:18:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-11-22 02:18:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 280. [2024-11-22 02:18:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 206 states have (on average 1.2281553398058251) internal successors, (253), 208 states have internal predecessors, (253), 27 states have call successors, (27), 11 states have call predecessors, (27), 46 states have return successors, (209), 60 states have call predecessors, (209), 19 states have call successors, (209) [2024-11-22 02:18:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 489 transitions. [2024-11-22 02:18:05,929 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 489 transitions. Word has length 77 [2024-11-22 02:18:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:18:05,930 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 489 transitions. [2024-11-22 02:18:05,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 41 states have internal predecessors, (75), 16 states have call successors, (19), 6 states have call predecessors, (19), 11 states have return successors, (16), 15 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-22 02:18:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 489 transitions. [2024-11-22 02:18:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-22 02:18:05,932 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:18:05,932 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] [2024-11-22 02:18:05,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 02:18:06,132 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 [2024-11-22 02:18:06,133 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:18:06,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:18:06,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1407278464, now seen corresponding path program 1 times [2024-11-22 02:18:06,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:18:06,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072206965] [2024-11-22 02:18:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:18:06,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:18:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:18:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 44 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-22 02:18:07,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:18:07,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072206965] [2024-11-22 02:18:07,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072206965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:18:07,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680423350] [2024-11-22 02:18:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:18:07,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:18:07,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:18:07,195 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) [2024-11-22 02:18:07,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 02:18:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:18:07,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-22 02:18:07,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:18:07,381 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 [2024-11-22 02:18:07,382 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 [2024-11-22 02:18:07,945 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 23 treesize of output 11 [2024-11-22 02:18:07,959 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 [2024-11-22 02:18:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-22 02:18:07,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:18:08,386 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2024-11-22 02:18:08,386 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 [2024-11-22 02:18:08,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680423350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:18:08,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 02:18:08,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 46 [2024-11-22 02:18:08,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519497958] [2024-11-22 02:18:08,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 02:18:08,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-22 02:18:08,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:18:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-22 02:18:08,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3237, Unknown=0, NotChecked=0, Total=3422 [2024-11-22 02:18:08,567 INFO L87 Difference]: Start difference. First operand 280 states and 489 transitions. Second operand has 46 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 35 states have internal predecessors, (79), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (20), 17 states have call predecessors, (20), 13 states have call successors, (20) [2024-11-22 02:18:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:18:10,012 INFO L93 Difference]: Finished difference Result 356 states and 605 transitions. [2024-11-22 02:18:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-22 02:18:10,013 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 35 states have internal predecessors, (79), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (20), 17 states have call predecessors, (20), 13 states have call successors, (20) Word has length 77 [2024-11-22 02:18:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:18:10,016 INFO L225 Difference]: With dead ends: 356 [2024-11-22 02:18:10,016 INFO L226 Difference]: Without dead ends: 354 [2024-11-22 02:18:10,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=426, Invalid=6380, Unknown=0, NotChecked=0, Total=6806 [2024-11-22 02:18:10,018 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1907 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-22 02:18:10,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 344 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1907 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-22 02:18:10,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2024-11-22 02:18:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 185. [2024-11-22 02:18:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 137 states have (on average 1.2116788321167884) internal successors, (166), 135 states have internal predecessors, (166), 22 states have call successors, (22), 10 states have call predecessors, (22), 25 states have return successors, (108), 39 states have call predecessors, (108), 14 states have call successors, (108) [2024-11-22 02:18:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 296 transitions. [2024-11-22 02:18:10,050 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 296 transitions. Word has length 77 [2024-11-22 02:18:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:18:10,050 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 296 transitions. [2024-11-22 02:18:10,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 35 states have internal predecessors, (79), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (20), 17 states have call predecessors, (20), 13 states have call successors, (20) [2024-11-22 02:18:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 296 transitions. [2024-11-22 02:18:10,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-22 02:18:10,052 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:18:10,052 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] [2024-11-22 02:18:10,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 02:18:10,253 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 [2024-11-22 02:18:10,253 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:18:10,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:18:10,254 INFO L85 PathProgramCache]: Analyzing trace with hash 983013763, now seen corresponding path program 2 times [2024-11-22 02:18:10,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:18:10,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951090215] [2024-11-22 02:18:10,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:18:10,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:18:10,270 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:18:10,270 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:18:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 21 proven. 46 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 02:18:11,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:18:11,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951090215] [2024-11-22 02:18:11,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951090215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:18:11,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042415926] [2024-11-22 02:18:11,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:18:11,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:18:11,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:18:11,190 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) [2024-11-22 02:18:11,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 02:18:11,317 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:18:11,317 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:18:11,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-22 02:18:11,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:18:11,389 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 [2024-11-22 02:18:11,392 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 [2024-11-22 02:18:11,479 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 02:18:11,479 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 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-22 02:18:11,489 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 02:18:11,490 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 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-22 02:18:11,521 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 31 treesize of output 19 [2024-11-22 02:18:11,526 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 31 treesize of output 19