./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/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-wip.fs.cvc5-61a6796-m [2024-10-14 03:21:06,701 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 03:21:06,741 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 03:21:06,747 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 03:21:06,747 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 03:21:06,768 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 03:21:06,768 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 03:21:06,769 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 03:21:06,769 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 03:21:06,769 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 03:21:06,769 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 03:21:06,770 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 03:21:06,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 03:21:06,775 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 03:21:06,775 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 03:21:06,776 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 03:21:06,776 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 03:21:06,776 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 03:21:06,776 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 03:21:06,776 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 03:21:06,776 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 03:21:06,777 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 03:21:06,777 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 03:21:06,778 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 03:21:06,778 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 03:21:06,778 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 03:21:06,778 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 03:21:06,778 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 03:21:06,779 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 03:21:06,779 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 03:21:06,779 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 03:21:06,779 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 03:21:06,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 03:21:06,780 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 03:21:06,780 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 03:21:06,780 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 03:21:06,780 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 03:21:06,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 03:21:06,781 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 03:21:06,781 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 03:21:06,781 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 03:21:06,782 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 03:21:06,782 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2024-10-14 03:21:06,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 03:21:06,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 03:21:06,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 03:21:06,992 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 03:21:06,992 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 03:21:06,993 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2024-10-14 03:21:08,193 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 03:21:08,338 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 03:21:08,338 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2024-10-14 03:21:08,343 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fb644526/ef8d42582f334924af02f1a028c40960/FLAGe3e06f0c9 [2024-10-14 03:21:08,759 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fb644526/ef8d42582f334924af02f1a028c40960 [2024-10-14 03:21:08,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 03:21:08,762 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 03:21:08,763 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 03:21:08,763 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 03:21:08,767 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 03:21:08,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:08,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d3cd7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08, skipping insertion in model container [2024-10-14 03:21:08,768 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:08,784 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 03:21:08,903 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2024-10-14 03:21:08,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 03:21:08,924 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 03:21:08,934 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2024-10-14 03:21:08,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 03:21:08,958 INFO L204 MainTranslator]: Completed translation [2024-10-14 03:21:08,959 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08 WrapperNode [2024-10-14 03:21:08,959 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 03:21:08,960 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 03:21:08,960 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 03:21:08,960 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 03:21:08,966 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:08,972 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:08,987 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 39 [2024-10-14 03:21:08,988 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 03:21:08,988 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 03:21:08,988 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 03:21:08,988 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 03:21:08,997 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:08,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:09,002 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:09,023 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]. [2024-10-14 03:21:09,024 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:09,024 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:09,031 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:09,036 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:09,038 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:09,039 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:09,041 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 03:21:09,042 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 03:21:09,042 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 03:21:09,042 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 03:21:09,045 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (1/1) ... [2024-10-14 03:21:09,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 03:21:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:21:09,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 03:21:09,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 03:21:09,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-14 03:21:09,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-14 03:21:09,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 03:21:09,138 INFO L130 BoogieDeclarations]: Found specification of procedure max [2024-10-14 03:21:09,138 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2024-10-14 03:21:09,138 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2024-10-14 03:21:09,138 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2024-10-14 03:21:09,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 03:21:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 03:21:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-10-14 03:21:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-10-14 03:21:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-14 03:21:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-14 03:21:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 03:21:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 03:21:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 03:21:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 03:21:09,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 03:21:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 03:21:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 03:21:09,236 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 03:21:09,238 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 03:21:09,408 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-10-14 03:21:09,408 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 03:21:09,430 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 03:21:09,434 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-14 03:21:09,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:21:09 BoogieIcfgContainer [2024-10-14 03:21:09,434 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 03:21:09,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 03:21:09,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 03:21:09,439 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 03:21:09,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 03:21:08" (1/3) ... [2024-10-14 03:21:09,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533776ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:21:09, skipping insertion in model container [2024-10-14 03:21:09,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:21:08" (2/3) ... [2024-10-14 03:21:09,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533776ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:21:09, skipping insertion in model container [2024-10-14 03:21:09,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:21:09" (3/3) ... [2024-10-14 03:21:09,441 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2024-10-14 03:21:09,453 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 03:21:09,454 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 03:21:09,503 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 03:21:09,508 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;@52c6ca5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 03:21:09,508 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 03:21:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 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) [2024-10-14 03:21:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-14 03:21:09,517 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:09,517 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:21:09,518 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:09,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash 46899722, now seen corresponding path program 1 times [2024-10-14 03:21:09,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:09,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232793012] [2024-10-14 03:21:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:09,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:09,871 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:09,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 03:21:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:21:09,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:09,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232793012] [2024-10-14 03:21:09,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232793012] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:21:09,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:21:09,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 03:21:09,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640869501] [2024-10-14 03:21:09,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:21:09,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 03:21:09,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:21:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 03:21:09,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-14 03:21:09,970 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 03:21:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:21:10,261 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2024-10-14 03:21:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 03:21:10,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-10-14 03:21:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:21:10,270 INFO L225 Difference]: With dead ends: 65 [2024-10-14 03:21:10,270 INFO L226 Difference]: Without dead ends: 35 [2024-10-14 03:21:10,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-14 03:21:10,277 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 03:21:10,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 84 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 03:21:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-14 03:21:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-14 03:21:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 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) [2024-10-14 03:21:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-10-14 03:21:10,372 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2024-10-14 03:21:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:21:10,372 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-10-14 03:21:10,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 03:21:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-10-14 03:21:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-14 03:21:10,374 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:10,374 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] [2024-10-14 03:21:10,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 03:21:10,374 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:10,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:10,375 INFO L85 PathProgramCache]: Analyzing trace with hash 678604871, now seen corresponding path program 1 times [2024-10-14 03:21:10,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:10,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245577956] [2024-10-14 03:21:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:10,495 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:10,590 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:10,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:10,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 03:21:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 03:21:10,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:10,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245577956] [2024-10-14 03:21:10,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245577956] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:21:10,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:21:10,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 03:21:10,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717671971] [2024-10-14 03:21:10,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:21:10,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 03:21:10,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:21:10,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 03:21:10,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-14 03:21:10,637 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 03:21:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:21:10,802 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2024-10-14 03:21:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 03:21:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-10-14 03:21:10,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:21:10,805 INFO L225 Difference]: With dead ends: 48 [2024-10-14 03:21:10,805 INFO L226 Difference]: Without dead ends: 37 [2024-10-14 03:21:10,806 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-14 03:21:10,807 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:21:10,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 101 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:21:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-14 03:21:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-14 03:21:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 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) [2024-10-14 03:21:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2024-10-14 03:21:10,814 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 30 [2024-10-14 03:21:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:21:10,814 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2024-10-14 03:21:10,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 03:21:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2024-10-14 03:21:10,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 03:21:10,816 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:10,816 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] [2024-10-14 03:21:10,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 03:21:10,816 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:10,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:10,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1585903113, now seen corresponding path program 1 times [2024-10-14 03:21:10,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:10,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026057531] [2024-10-14 03:21:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:10,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:11,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:11,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:11,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:11,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 03:21:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:11,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:11,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-14 03:21:11,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:11,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026057531] [2024-10-14 03:21:11,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026057531] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:11,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173285359] [2024-10-14 03:21:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:11,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:21:11,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:21:11,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:21:11,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 03:21:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:11,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-14 03:21:11,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:21:11,721 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 [2024-10-14 03:21:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-14 03:21:11,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:21:11,905 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-10-14 03:21:11,905 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 [2024-10-14 03:21:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-14 03:21:11,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173285359] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:21:11,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:21:11,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2024-10-14 03:21:11,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953511766] [2024-10-14 03:21:11,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:21:11,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 03:21:11,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:21:11,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 03:21:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2024-10-14 03:21:11,944 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-14 03:21:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:21:12,327 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2024-10-14 03:21:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 03:21:12,328 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 43 [2024-10-14 03:21:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:21:12,329 INFO L225 Difference]: With dead ends: 46 [2024-10-14 03:21:12,329 INFO L226 Difference]: Without dead ends: 44 [2024-10-14 03:21:12,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2024-10-14 03:21:12,331 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 03:21:12,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 126 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 03:21:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-14 03:21:12,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2024-10-14 03:21:12,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 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) [2024-10-14 03:21:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2024-10-14 03:21:12,341 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 43 [2024-10-14 03:21:12,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:21:12,341 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2024-10-14 03:21:12,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-14 03:21:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2024-10-14 03:21:12,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-14 03:21:12,342 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:12,342 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] [2024-10-14 03:21:12,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 03:21:12,543 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 [2024-10-14 03:21:12,543 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:12,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:12,544 INFO L85 PathProgramCache]: Analyzing trace with hash -256968945, now seen corresponding path program 1 times [2024-10-14 03:21:12,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:12,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70936623] [2024-10-14 03:21:12,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:12,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:12,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:12,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:12,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:12,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 03:21:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:13,067 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:13,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-14 03:21:13,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:13,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70936623] [2024-10-14 03:21:13,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70936623] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:13,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138277697] [2024-10-14 03:21:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:13,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:21:13,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:21:13,123 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:21:13,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 03:21:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:13,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-14 03:21:13,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:21:13,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 03:21:13,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 03:21:13,317 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 [2024-10-14 03:21:13,321 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 [2024-10-14 03:21:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-14 03:21:13,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:21:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-14 03:21:13,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138277697] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:21:13,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:21:13,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 14] total 30 [2024-10-14 03:21:13,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667492606] [2024-10-14 03:21:13,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:21:13,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 03:21:13,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:21:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 03:21:13,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2024-10-14 03:21:13,986 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 30 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-10-14 03:21:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:21:15,226 INFO L93 Difference]: Finished difference Result 113 states and 154 transitions. [2024-10-14 03:21:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-14 03:21:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) Word has length 49 [2024-10-14 03:21:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:21:15,229 INFO L225 Difference]: With dead ends: 113 [2024-10-14 03:21:15,229 INFO L226 Difference]: Without dead ends: 99 [2024-10-14 03:21:15,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=305, Invalid=2665, Unknown=0, NotChecked=0, Total=2970 [2024-10-14 03:21:15,231 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 242 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 03:21:15,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 276 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 03:21:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-14 03:21:15,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2024-10-14 03:21:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 62 states have internal predecessors, (73), 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) [2024-10-14 03:21:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 125 transitions. [2024-10-14 03:21:15,244 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 125 transitions. Word has length 49 [2024-10-14 03:21:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:21:15,244 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 125 transitions. [2024-10-14 03:21:15,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-10-14 03:21:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 125 transitions. [2024-10-14 03:21:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-14 03:21:15,246 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:15,247 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] [2024-10-14 03:21:15,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 03:21:15,450 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 [2024-10-14 03:21:15,451 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:15,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash -140605299, now seen corresponding path program 1 times [2024-10-14 03:21:15,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:15,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435829553] [2024-10-14 03:21:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:15,751 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:15,845 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:15,849 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:15,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 03:21:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:15,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:15,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-14 03:21:15,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:15,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435829553] [2024-10-14 03:21:15,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435829553] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:15,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559605762] [2024-10-14 03:21:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:15,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:21:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:21:15,880 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:21:15,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 03:21:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:15,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-14 03:21:15,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:21:15,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 03:21:15,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 03:21:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-14 03:21:16,196 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:21:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-14 03:21:16,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559605762] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:21:16,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:21:16,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 21 [2024-10-14 03:21:16,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107843639] [2024-10-14 03:21:16,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:21:16,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 03:21:16,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:21:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 03:21:16,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-10-14 03:21:16,315 INFO L87 Difference]: Start difference. First operand 87 states and 125 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-14 03:21:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:21:16,802 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2024-10-14 03:21:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 03:21:16,802 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) Word has length 49 [2024-10-14 03:21:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:21:16,804 INFO L225 Difference]: With dead ends: 149 [2024-10-14 03:21:16,804 INFO L226 Difference]: Without dead ends: 106 [2024-10-14 03:21:16,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2024-10-14 03:21:16,805 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 03:21:16,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 145 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 03:21:16,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-14 03:21:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2024-10-14 03:21:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 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) [2024-10-14 03:21:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 131 transitions. [2024-10-14 03:21:16,817 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 131 transitions. Word has length 49 [2024-10-14 03:21:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:21:16,818 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 131 transitions. [2024-10-14 03:21:16,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 13 states have internal predecessors, (47), 6 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-14 03:21:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 131 transitions. [2024-10-14 03:21:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-14 03:21:16,819 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:16,819 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] [2024-10-14 03:21:16,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 03:21:17,023 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 [2024-10-14 03:21:17,024 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:17,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:17,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1138374282, now seen corresponding path program 2 times [2024-10-14 03:21:17,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:17,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606257622] [2024-10-14 03:21:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:17,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:17,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:17,536 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:17,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:17,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:17,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:17,572 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 03:21:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:17,637 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:17,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-14 03:21:17,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:17,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606257622] [2024-10-14 03:21:17,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606257622] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:17,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387942116] [2024-10-14 03:21:17,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 03:21:17,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:21:17,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:21:17,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:21:17,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 03:21:17,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 03:21:17,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:21:17,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-14 03:21:17,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:21:17,811 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 [2024-10-14 03:21:17,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:21:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-14 03:21:18,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:21:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-14 03:21:18,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387942116] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:21:18,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:21:18,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 38 [2024-10-14 03:21:18,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895676859] [2024-10-14 03:21:18,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:21:18,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-14 03:21:18,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:21:18,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-14 03:21:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2024-10-14 03:21:18,516 INFO L87 Difference]: Start difference. First operand 94 states and 131 transitions. Second operand has 38 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 13 states have call successors, (20), 6 states have call predecessors, (20), 11 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2024-10-14 03:21:19,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:21:19,418 INFO L93 Difference]: Finished difference Result 160 states and 226 transitions. [2024-10-14 03:21:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-14 03:21:19,419 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 13 states have call successors, (20), 6 states have call predecessors, (20), 11 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2024-10-14 03:21:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:21:19,420 INFO L225 Difference]: With dead ends: 160 [2024-10-14 03:21:19,421 INFO L226 Difference]: Without dead ends: 141 [2024-10-14 03:21:19,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=2519, Unknown=0, NotChecked=0, Total=2756 [2024-10-14 03:21:19,427 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 78 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 03:21:19,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 378 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 03:21:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-14 03:21:19,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2024-10-14 03:21:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 80 states have (on average 1.25) internal successors, (100), 83 states have internal predecessors, (100), 19 states have call successors, (19), 10 states have call predecessors, (19), 15 states have return successors, (50), 21 states have call predecessors, (50), 14 states have call successors, (50) [2024-10-14 03:21:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 169 transitions. [2024-10-14 03:21:19,457 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 169 transitions. Word has length 61 [2024-10-14 03:21:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:21:19,459 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 169 transitions. [2024-10-14 03:21:19,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 13 states have call successors, (20), 6 states have call predecessors, (20), 11 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2024-10-14 03:21:19,460 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 169 transitions. [2024-10-14 03:21:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-14 03:21:19,465 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:19,465 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] [2024-10-14 03:21:19,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 03:21:19,666 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 [2024-10-14 03:21:19,666 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:19,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1801360064, now seen corresponding path program 3 times [2024-10-14 03:21:19,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:19,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55517431] [2024-10-14 03:21:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:19,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:20,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:20,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:20,183 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:20,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:20,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:20,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 03:21:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:20,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:20,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:20,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:20,524 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 22 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-10-14 03:21:20,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:20,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55517431] [2024-10-14 03:21:20,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55517431] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:20,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885891187] [2024-10-14 03:21:20,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 03:21:20,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:21:20,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:21:20,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:21:20,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 03:21:20,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-14 03:21:20,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:21:20,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-10-14 03:21:20,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:21:20,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:21:20,717 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 [2024-10-14 03:21:21,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 03:21:21,655 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 [2024-10-14 03:21:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 26 proven. 27 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-14 03:21:21,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:21:22,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 03:21:22,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2024-10-14 03:21:22,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885891187] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:22,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 03:21:22,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 50 [2024-10-14 03:21:22,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154632041] [2024-10-14 03:21:22,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 03:21:22,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-14 03:21:22,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:21:22,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-14 03:21:22,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3231, Unknown=0, NotChecked=0, Total=3422 [2024-10-14 03:21:22,346 INFO L87 Difference]: Start difference. First operand 115 states and 169 transitions. Second operand has 50 states, 40 states have (on average 1.8) internal successors, (72), 37 states have internal predecessors, (72), 16 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-14 03:21:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:21:24,288 INFO L93 Difference]: Finished difference Result 211 states and 345 transitions. [2024-10-14 03:21:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-14 03:21:24,289 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 40 states have (on average 1.8) internal successors, (72), 37 states have internal predecessors, (72), 16 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 74 [2024-10-14 03:21:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:21:24,292 INFO L225 Difference]: With dead ends: 211 [2024-10-14 03:21:24,292 INFO L226 Difference]: Without dead ends: 209 [2024-10-14 03:21:24,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=504, Invalid=7328, Unknown=0, NotChecked=0, Total=7832 [2024-10-14 03:21:24,294 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:21:24,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 441 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2349 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-14 03:21:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-10-14 03:21:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 160. [2024-10-14 03:21:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 113 states have (on average 1.247787610619469) internal successors, (141), 118 states have internal predecessors, (141), 23 states have call successors, (23), 12 states have call predecessors, (23), 23 states have return successors, (94), 29 states have call predecessors, (94), 15 states have call successors, (94) [2024-10-14 03:21:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 258 transitions. [2024-10-14 03:21:24,329 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 258 transitions. Word has length 74 [2024-10-14 03:21:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:21:24,329 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 258 transitions. [2024-10-14 03:21:24,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 40 states have (on average 1.8) internal successors, (72), 37 states have internal predecessors, (72), 16 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-14 03:21:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 258 transitions. [2024-10-14 03:21:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-14 03:21:24,331 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:24,331 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] [2024-10-14 03:21:24,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 03:21:24,531 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 [2024-10-14 03:21:24,532 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:24,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:24,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1299718097, now seen corresponding path program 1 times [2024-10-14 03:21:24,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:24,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648449301] [2024-10-14 03:21:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:24,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:25,349 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:25,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:25,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:25,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:25,476 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:25,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 03:21:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:25,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:25,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:25,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:25,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-14 03:21:25,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:25,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648449301] [2024-10-14 03:21:25,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648449301] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:25,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525610510] [2024-10-14 03:21:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:25,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:21:25,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:21:25,973 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:21:25,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 03:21:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:26,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-10-14 03:21:26,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:21:26,120 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 [2024-10-14 03:21:26,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 03:21:26,947 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 [2024-10-14 03:21:27,066 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 [2024-10-14 03:21:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-14 03:21:27,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:21:27,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 03:21:27,828 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 [2024-10-14 03:21:28,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525610510] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:28,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 03:21:28,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 55 [2024-10-14 03:21:28,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162057093] [2024-10-14 03:21:28,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 03:21:28,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-14 03:21:28,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:21:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-14 03:21:28,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=4468, Unknown=0, NotChecked=0, Total=4692 [2024-10-14 03:21:28,123 INFO L87 Difference]: Start difference. First operand 160 states and 258 transitions. Second operand has 55 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 39 states have internal predecessors, (73), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-14 03:21:30,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:21:30,330 INFO L93 Difference]: Finished difference Result 348 states and 619 transitions. [2024-10-14 03:21:30,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-14 03:21:30,331 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 39 states have internal predecessors, (73), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) Word has length 75 [2024-10-14 03:21:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:21:30,333 INFO L225 Difference]: With dead ends: 348 [2024-10-14 03:21:30,333 INFO L226 Difference]: Without dead ends: 227 [2024-10-14 03:21:30,340 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=576, Invalid=9524, Unknown=0, NotChecked=0, Total=10100 [2024-10-14 03:21:30,342 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:21:30,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 320 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-14 03:21:30,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-10-14 03:21:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 176. [2024-10-14 03:21:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 126 states have (on average 1.2380952380952381) internal successors, (156), 129 states have internal predecessors, (156), 24 states have call successors, (24), 12 states have call predecessors, (24), 25 states have return successors, (106), 34 states have call predecessors, (106), 16 states have call successors, (106) [2024-10-14 03:21:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 286 transitions. [2024-10-14 03:21:30,379 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 286 transitions. Word has length 75 [2024-10-14 03:21:30,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:21:30,380 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 286 transitions. [2024-10-14 03:21:30,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 39 states have internal predecessors, (73), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-14 03:21:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 286 transitions. [2024-10-14 03:21:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-14 03:21:30,383 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:30,383 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] [2024-10-14 03:21:30,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 03:21:30,583 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 [2024-10-14 03:21:30,584 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:30,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:30,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2098792093, now seen corresponding path program 2 times [2024-10-14 03:21:30,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:30,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297082884] [2024-10-14 03:21:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:30,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:30,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:30,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:30,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:30,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:30,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:30,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 03:21:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:30,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:30,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:30,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:30,816 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-14 03:21:30,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:30,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297082884] [2024-10-14 03:21:30,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297082884] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:30,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093466586] [2024-10-14 03:21:30,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 03:21:30,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:21:30,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:21:30,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:21:30,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 03:21:30,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 03:21:30,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:21:30,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 03:21:30,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:21:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-14 03:21:31,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:21:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-14 03:21:31,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093466586] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:21:31,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:21:31,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2024-10-14 03:21:31,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565855009] [2024-10-14 03:21:31,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:21:31,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 03:21:31,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:21:31,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 03:21:31,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2024-10-14 03:21:31,335 INFO L87 Difference]: Start difference. First operand 176 states and 286 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-14 03:21:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:21:31,826 INFO L93 Difference]: Finished difference Result 347 states and 641 transitions. [2024-10-14 03:21:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 03:21:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2024-10-14 03:21:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:21:31,830 INFO L225 Difference]: With dead ends: 347 [2024-10-14 03:21:31,830 INFO L226 Difference]: Without dead ends: 210 [2024-10-14 03:21:31,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 153 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=1342, Unknown=0, NotChecked=0, Total=1560 [2024-10-14 03:21:31,832 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 03:21:31,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 217 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 03:21:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-10-14 03:21:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 192. [2024-10-14 03:21:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 138 states have (on average 1.2028985507246377) internal successors, (166), 141 states have internal predecessors, (166), 24 states have call successors, (24), 12 states have call predecessors, (24), 29 states have return successors, (126), 38 states have call predecessors, (126), 16 states have call successors, (126) [2024-10-14 03:21:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 316 transitions. [2024-10-14 03:21:31,853 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 316 transitions. Word has length 75 [2024-10-14 03:21:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:21:31,853 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 316 transitions. [2024-10-14 03:21:31,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-14 03:21:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 316 transitions. [2024-10-14 03:21:31,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-14 03:21:31,855 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:31,855 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] [2024-10-14 03:21:31,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-14 03:21:32,056 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 [2024-10-14 03:21:32,056 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:32,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash 669259790, now seen corresponding path program 1 times [2024-10-14 03:21:32,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:32,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122072297] [2024-10-14 03:21:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:32,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:32,623 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:32,731 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:32,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:32,761 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:32,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:32,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 03:21:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:32,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:32,996 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:33,187 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:33,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-14 03:21:33,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:33,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122072297] [2024-10-14 03:21:33,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122072297] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:33,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127762777] [2024-10-14 03:21:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:33,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:21:33,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:21:33,196 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:21:33,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 03:21:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:33,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-10-14 03:21:33,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:21:33,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 03:21:33,365 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 [2024-10-14 03:21:34,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 03:21:34,514 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 [2024-10-14 03:21:34,523 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-14 03:21:34,523 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 [2024-10-14 03:21:34,643 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 [2024-10-14 03:21:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-14 03:21:34,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:21:35,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 03:21:35,585 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 [2024-10-14 03:21:36,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127762777] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:36,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 03:21:36,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 34] total 60 [2024-10-14 03:21:36,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30472158] [2024-10-14 03:21:36,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 03:21:36,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-14 03:21:36,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:21:36,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-14 03:21:36,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=5441, Unknown=0, NotChecked=0, Total=5700 [2024-10-14 03:21:36,198 INFO L87 Difference]: Start difference. First operand 192 states and 316 transitions. Second operand has 60 states, 50 states have (on average 1.52) internal successors, (76), 43 states have internal predecessors, (76), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-14 03:21:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:21:39,428 INFO L93 Difference]: Finished difference Result 252 states and 407 transitions. [2024-10-14 03:21:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-10-14 03:21:39,428 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 50 states have (on average 1.52) internal successors, (76), 43 states have internal predecessors, (76), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) Word has length 76 [2024-10-14 03:21:39,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:21:39,431 INFO L225 Difference]: With dead ends: 252 [2024-10-14 03:21:39,431 INFO L226 Difference]: Without dead ends: 250 [2024-10-14 03:21:39,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=697, Invalid=12875, Unknown=0, NotChecked=0, Total=13572 [2024-10-14 03:21:39,434 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 2795 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-14 03:21:39,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 407 Invalid, 2828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2795 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-14 03:21:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-10-14 03:21:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 193. [2024-10-14 03:21:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 139 states have (on average 1.20863309352518) internal successors, (168), 142 states have internal predecessors, (168), 24 states have call successors, (24), 12 states have call predecessors, (24), 29 states have return successors, (126), 38 states have call predecessors, (126), 16 states have call successors, (126) [2024-10-14 03:21:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 318 transitions. [2024-10-14 03:21:39,460 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 318 transitions. Word has length 76 [2024-10-14 03:21:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:21:39,461 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 318 transitions. [2024-10-14 03:21:39,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 50 states have (on average 1.52) internal successors, (76), 43 states have internal predecessors, (76), 16 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (17), 16 states have call predecessors, (17), 12 states have call successors, (17) [2024-10-14 03:21:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 318 transitions. [2024-10-14 03:21:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-14 03:21:39,462 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:39,463 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] [2024-10-14 03:21:39,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 03:21:39,663 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 [2024-10-14 03:21:39,663 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:39,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash -838292019, now seen corresponding path program 1 times [2024-10-14 03:21:39,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:39,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726418877] [2024-10-14 03:21:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:39,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,433 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 03:21:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,581 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,680 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-14 03:21:40,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:40,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726418877] [2024-10-14 03:21:40,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726418877] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:40,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886718142] [2024-10-14 03:21:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:40,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:21:40,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:21:40,686 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:21:40,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 03:21:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:40,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-14 03:21:40,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:21:40,833 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 [2024-10-14 03:21:40,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 03:21:41,344 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 [2024-10-14 03:21:41,358 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 [2024-10-14 03:21:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-14 03:21:41,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:21:41,764 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2024-10-14 03:21:41,765 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 [2024-10-14 03:21:41,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886718142] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:41,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 03:21:41,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 43 [2024-10-14 03:21:41,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219944859] [2024-10-14 03:21:41,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 03:21:41,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-14 03:21:41,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:21:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-14 03:21:41,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2901, Unknown=0, NotChecked=0, Total=3080 [2024-10-14 03:21:41,907 INFO L87 Difference]: Start difference. First operand 193 states and 318 transitions. Second operand has 43 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 31 states have internal predecessors, (68), 14 states have call successors, (21), 6 states have call predecessors, (21), 9 states have return successors, (17), 15 states have call predecessors, (17), 11 states have call successors, (17) [2024-10-14 03:21:43,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:21:43,174 INFO L93 Difference]: Finished difference Result 265 states and 422 transitions. [2024-10-14 03:21:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 03:21:43,174 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 31 states have internal predecessors, (68), 14 states have call successors, (21), 6 states have call predecessors, (21), 9 states have return successors, (17), 15 states have call predecessors, (17), 11 states have call successors, (17) Word has length 76 [2024-10-14 03:21:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:21:43,176 INFO L225 Difference]: With dead ends: 265 [2024-10-14 03:21:43,176 INFO L226 Difference]: Without dead ends: 263 [2024-10-14 03:21:43,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=349, Invalid=5053, Unknown=0, NotChecked=0, Total=5402 [2024-10-14 03:21:43,177 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-14 03:21:43,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 242 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-14 03:21:43,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-10-14 03:21:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 187. [2024-10-14 03:21:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 136 states have (on average 1.213235294117647) internal successors, (165), 136 states have internal predecessors, (165), 24 states have call successors, (24), 12 states have call predecessors, (24), 26 states have return successors, (111), 38 states have call predecessors, (111), 16 states have call successors, (111) [2024-10-14 03:21:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 300 transitions. [2024-10-14 03:21:43,197 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 300 transitions. Word has length 76 [2024-10-14 03:21:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:21:43,197 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 300 transitions. [2024-10-14 03:21:43,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 31 states have internal predecessors, (68), 14 states have call successors, (21), 6 states have call predecessors, (21), 9 states have return successors, (17), 15 states have call predecessors, (17), 11 states have call successors, (17) [2024-10-14 03:21:43,198 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 300 transitions. [2024-10-14 03:21:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-14 03:21:43,199 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:21:43,199 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] [2024-10-14 03:21:43,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-14 03:21:43,399 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 [2024-10-14 03:21:43,400 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:21:43,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:21:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash 721459472, now seen corresponding path program 2 times [2024-10-14 03:21:43,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:21:43,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218510848] [2024-10-14 03:21:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:21:43,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:21:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:43,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:21:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:43,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:43,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:43,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:43,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:43,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-14 03:21:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:43,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:43,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:21:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:43,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-14 03:21:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:43,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-14 03:21:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-14 03:21:43,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:21:43,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218510848] [2024-10-14 03:21:43,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218510848] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:21:43,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055641371] [2024-10-14 03:21:43,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 03:21:43,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:21:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:21:43,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:21:43,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 03:21:43,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 03:21:43,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:21:43,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-10-14 03:21:43,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:21:43,963 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 [2024-10-14 03:21:44,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:21:44,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:21:44,131 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_48 Int)) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_48) 0) (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| v_nondet_tree_~n~0.base_48 (select |c_#memory_$Pointer$#1.offset| v_nondet_tree_~n~0.base_48))) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| v_nondet_tree_~n~0.base_48 (select |c_#memory_$Pointer$#1.base| v_nondet_tree_~n~0.base_48))))) is different from true [2024-10-14 03:21:44,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 03:21:44,142 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 16 treesize of output 11 [2024-10-14 03:21:44,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 03:21:44,144 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 16 treesize of output 11 [2024-10-14 03:21:44,149 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 03:21:44,149 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 [2024-10-14 03:21:44,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-14 03:21:44,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-14 03:22:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 17 trivial. 8 not checked. [2024-10-14 03:22:20,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:22:20,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055641371] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:22:20,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 03:22:20,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 34 [2024-10-14 03:22:20,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27561970] [2024-10-14 03:22:20,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 03:22:20,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-14 03:22:20,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:22:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-14 03:22:20,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1220, Unknown=10, NotChecked=70, Total=1406 [2024-10-14 03:22:20,820 INFO L87 Difference]: Start difference. First operand 187 states and 300 transitions. Second operand has 34 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 14 states have call successors, (22), 8 states have call predecessors, (22), 13 states have return successors, (20), 14 states have call predecessors, (20), 13 states have call successors, (20) [2024-10-14 03:22:24,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 03:22:33,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 03:22:41,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]