./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56b28f59847d63942ec468b0c95f39e5b8c0763a .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 06:02:13,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:02:13,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:02:13,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:02:13,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:02:13,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:02:13,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:02:13,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:02:13,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:02:13,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:02:13,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:02:13,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:02:13,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:02:13,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:02:13,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:02:13,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:02:13,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:02:13,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:02:13,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:02:13,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:02:13,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:02:13,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:02:13,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:02:13,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:02:13,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:02:13,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:02:13,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:02:13,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:02:13,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:02:13,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:02:13,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:02:13,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:02:13,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:02:13,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:02:13,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:02:13,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:02:13,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:02:13,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:02:13,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:02:13,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:02:13,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:02:13,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 06:02:13,371 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:02:13,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:02:13,372 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:02:13,372 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:02:13,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:02:13,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:02:13,374 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:02:13,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:02:13,375 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:02:13,375 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:02:13,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:02:13,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:02:13,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:02:13,376 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:02:13,376 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:02:13,376 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:02:13,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:02:13,376 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:02:13,377 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:02:13,377 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:02:13,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:02:13,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:02:13,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:02:13,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:02:13,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:02:13,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:02:13,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 06:02:13,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 06:02:13,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:02:13,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56b28f59847d63942ec468b0c95f39e5b8c0763a [2021-08-27 06:02:13,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:02:13,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:02:13,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:02:13,653 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:02:13,654 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:02:13,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2021-08-27 06:02:13,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27d51267b/9eb03c32d56440cf9eedba847daecb41/FLAG891bb3c67 [2021-08-27 06:02:13,996 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:02:13,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2021-08-27 06:02:14,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27d51267b/9eb03c32d56440cf9eedba847daecb41/FLAG891bb3c67 [2021-08-27 06:02:14,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27d51267b/9eb03c32d56440cf9eedba847daecb41 [2021-08-27 06:02:14,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:02:14,435 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:02:14,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:02:14,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:02:14,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:02:14,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:02:14" (1/1) ... [2021-08-27 06:02:14,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af737e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:14, skipping insertion in model container [2021-08-27 06:02:14,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:02:14" (1/1) ... [2021-08-27 06:02:14,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:02:14,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:02:14,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:02:14,541 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:02:14,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:02:14,560 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:02:14,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:14 WrapperNode [2021-08-27 06:02:14,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:02:14,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:02:14,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:02:14,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:02:14,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:14" (1/1) ... [2021-08-27 06:02:14,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:14" (1/1) ... [2021-08-27 06:02:14,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:14" (1/1) ... [2021-08-27 06:02:14,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:14" (1/1) ... [2021-08-27 06:02:14,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:14" (1/1) ... [2021-08-27 06:02:14,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:14" (1/1) ... [2021-08-27 06:02:14,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:14" (1/1) ... [2021-08-27 06:02:14,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:02:14,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:02:14,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:02:14,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:02:14,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:14" (1/1) ... [2021-08-27 06:02:14,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:02:14,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:14,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 06:02:14,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 06:02:14,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:02:14,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:02:14,665 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-27 06:02:14,665 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:02:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-27 06:02:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 06:02:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:02:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:02:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 06:02:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:02:14,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:02:14,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:02:14,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:02:14,932 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 06:02:14,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:02:14 BoogieIcfgContainer [2021-08-27 06:02:14,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:02:14,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:02:14,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:02:14,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:02:14,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:02:14" (1/3) ... [2021-08-27 06:02:14,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca9158c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:02:14, skipping insertion in model container [2021-08-27 06:02:14,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:14" (2/3) ... [2021-08-27 06:02:14,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca9158c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:02:14, skipping insertion in model container [2021-08-27 06:02:14,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:02:14" (3/3) ... [2021-08-27 06:02:14,941 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2021-08-27 06:02:14,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:02:14,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-08-27 06:02:14,985 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:02:14,991 INFO L339 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, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 06:02:14,992 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-27 06:02:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:02:15,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:15,012 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:15,012 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:15,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-08-27 06:02:15,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:15,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232102246] [2021-08-27 06:02:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:15,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:15,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:15,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:15,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232102246] [2021-08-27 06:02:15,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232102246] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:15,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:15,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:02:15,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48872833] [2021-08-27 06:02:15,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:02:15,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:02:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:02:15,246 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:15,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:15,431 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-08-27 06:02:15,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:02:15,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 06:02:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:15,438 INFO L225 Difference]: With dead ends: 58 [2021-08-27 06:02:15,438 INFO L226 Difference]: Without dead ends: 54 [2021-08-27 06:02:15,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:02:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-27 06:02:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-08-27 06:02:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 33 states have internal predecessors, (37), 3 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) [2021-08-27 06:02:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-27 06:02:15,466 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-08-27 06:02:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:15,466 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-27 06:02:15,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-27 06:02:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 06:02:15,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:15,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:15,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 06:02:15,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:15,469 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-08-27 06:02:15,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:15,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665920471] [2021-08-27 06:02:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:15,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:15,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:15,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:15,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665920471] [2021-08-27 06:02:15,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665920471] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:15,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:15,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:02:15,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896817793] [2021-08-27 06:02:15,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:02:15,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:02:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:02:15,549 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:15,679 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-08-27 06:02:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:02:15,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 06:02:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:15,681 INFO L225 Difference]: With dead ends: 49 [2021-08-27 06:02:15,682 INFO L226 Difference]: Without dead ends: 49 [2021-08-27 06:02:15,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:02:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-27 06:02:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-08-27 06:02:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 35 states have internal predecessors, (40), 3 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) [2021-08-27 06:02:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-27 06:02:15,685 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2021-08-27 06:02:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:15,686 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-27 06:02:15,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-27 06:02:15,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 06:02:15,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:15,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:15,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 06:02:15,687 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:15,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:15,687 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2021-08-27 06:02:15,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:15,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982740267] [2021-08-27 06:02:15,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:15,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:15,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:15,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:15,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982740267] [2021-08-27 06:02:15,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982740267] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:15,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:15,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:02:15,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509050186] [2021-08-27 06:02:15,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:02:15,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:15,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:02:15,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:02:15,759 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:15,923 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-08-27 06:02:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:02:15,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-27 06:02:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:15,924 INFO L225 Difference]: With dead ends: 40 [2021-08-27 06:02:15,924 INFO L226 Difference]: Without dead ends: 40 [2021-08-27 06:02:15,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:02:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-27 06:02:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-27 06:02:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 34 states have internal predecessors, (39), 3 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) [2021-08-27 06:02:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-08-27 06:02:15,927 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2021-08-27 06:02:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:15,928 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-08-27 06:02:15,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:15,928 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-08-27 06:02:15,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 06:02:15,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:15,928 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:15,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 06:02:15,929 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:15,929 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2021-08-27 06:02:15,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:15,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540414892] [2021-08-27 06:02:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:15,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:16,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:16,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:16,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540414892] [2021-08-27 06:02:16,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540414892] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:16,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:16,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:02:16,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460633750] [2021-08-27 06:02:16,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:02:16,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:02:16,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:02:16,032 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:16,194 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-08-27 06:02:16,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:02:16,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-27 06:02:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:16,196 INFO L225 Difference]: With dead ends: 46 [2021-08-27 06:02:16,196 INFO L226 Difference]: Without dead ends: 46 [2021-08-27 06:02:16,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:02:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-27 06:02:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-08-27 06:02:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 35 states have internal predecessors, (40), 3 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) [2021-08-27 06:02:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-27 06:02:16,203 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2021-08-27 06:02:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:16,204 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-27 06:02:16,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-27 06:02:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 06:02:16,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:16,205 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:16,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 06:02:16,205 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-08-27 06:02:16,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:16,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79725880] [2021-08-27 06:02:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:16,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:16,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:16,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:16,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:16,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79725880] [2021-08-27 06:02:16,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79725880] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:16,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:16,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:02:16,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160783961] [2021-08-27 06:02:16,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:02:16,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:16,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:02:16,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:02:16,292 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:16,459 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-08-27 06:02:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:02:16,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-08-27 06:02:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:16,460 INFO L225 Difference]: With dead ends: 61 [2021-08-27 06:02:16,460 INFO L226 Difference]: Without dead ends: 61 [2021-08-27 06:02:16,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:02:16,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-27 06:02:16,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2021-08-27 06:02:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 39 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 06:02:16,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-08-27 06:02:16,464 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 15 [2021-08-27 06:02:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:16,465 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-08-27 06:02:16,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:16,465 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-08-27 06:02:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 06:02:16,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:16,465 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:16,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 06:02:16,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:16,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:16,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2021-08-27 06:02:16,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:16,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845312648] [2021-08-27 06:02:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:16,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:16,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:16,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:16,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845312648] [2021-08-27 06:02:16,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845312648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:16,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730276978] [2021-08-27 06:02:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:16,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:16,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:16,532 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) [2021-08-27 06:02:16,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 06:02:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 06:02:16,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:16,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730276978] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:16,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:02:16,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-08-27 06:02:16,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163716582] [2021-08-27 06:02:16,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:02:16,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:16,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:02:16,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:02:16,744 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:16,827 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-08-27 06:02:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:02:16,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 06:02:16,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:16,830 INFO L225 Difference]: With dead ends: 72 [2021-08-27 06:02:16,830 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 06:02:16,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:02:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 06:02:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-08-27 06:02:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 45 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-08-27 06:02:16,847 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 16 [2021-08-27 06:02:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:16,847 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-08-27 06:02:16,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-08-27 06:02:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 06:02:16,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:16,848 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:16,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:17,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-27 06:02:17,053 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:17,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2021-08-27 06:02:17,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:17,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591138931] [2021-08-27 06:02:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:17,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:17,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:17,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:17,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:17,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591138931] [2021-08-27 06:02:17,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591138931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:17,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605129999] [2021-08-27 06:02:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:17,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:17,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:17,122 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) [2021-08-27 06:02:17,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 06:02:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:17,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 06:02:17,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:17,218 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:02:17,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-27 06:02:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:02:17,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605129999] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:17,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:02:17,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-08-27 06:02:17,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373074676] [2021-08-27 06:02:17,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:02:17,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:17,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:02:17,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:02:17,636 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:17,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:17,657 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-08-27 06:02:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:02:17,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-08-27 06:02:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:17,658 INFO L225 Difference]: With dead ends: 50 [2021-08-27 06:02:17,658 INFO L226 Difference]: Without dead ends: 50 [2021-08-27 06:02:17,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:02:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-27 06:02:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-27 06:02:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.236842105263158) internal successors, (47), 43 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-08-27 06:02:17,661 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 20 [2021-08-27 06:02:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:17,661 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-08-27 06:02:17,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-08-27 06:02:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 06:02:17,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:17,662 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:17,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:17,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-27 06:02:17,874 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:17,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234190, now seen corresponding path program 1 times [2021-08-27 06:02:17,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:17,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770141883] [2021-08-27 06:02:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:17,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:17,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:17,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:02:17,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:17,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770141883] [2021-08-27 06:02:17,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770141883] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:17,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:17,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:02:17,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936605600] [2021-08-27 06:02:17,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:02:17,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:17,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:02:17,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:02:17,953 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:18,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:18,019 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-08-27 06:02:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:02:18,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-08-27 06:02:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:18,021 INFO L225 Difference]: With dead ends: 54 [2021-08-27 06:02:18,025 INFO L226 Difference]: Without dead ends: 54 [2021-08-27 06:02:18,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:02:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-27 06:02:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-08-27 06:02:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.225) internal successors, (49), 44 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-08-27 06:02:18,038 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 20 [2021-08-27 06:02:18,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:18,038 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-08-27 06:02:18,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:18,038 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-08-27 06:02:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 06:02:18,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:18,039 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:18,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 06:02:18,039 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2011781567, now seen corresponding path program 1 times [2021-08-27 06:02:18,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:18,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597489519] [2021-08-27 06:02:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:18,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:02:18,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:18,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597489519] [2021-08-27 06:02:18,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597489519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:18,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663947496] [2021-08-27 06:02:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:18,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:18,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:18,086 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) [2021-08-27 06:02:18,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 06:02:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:02:18,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:02:18,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663947496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:18,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:18,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 06:02:18,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760969136] [2021-08-27 06:02:18,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:02:18,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:18,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:02:18,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:02:18,215 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:18,278 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2021-08-27 06:02:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:02:18,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-08-27 06:02:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:18,279 INFO L225 Difference]: With dead ends: 76 [2021-08-27 06:02:18,280 INFO L226 Difference]: Without dead ends: 76 [2021-08-27 06:02:18,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:02:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-27 06:02:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-08-27 06:02:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-08-27 06:02:18,282 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 26 [2021-08-27 06:02:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:18,283 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-08-27 06:02:18,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-08-27 06:02:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 06:02:18,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:18,283 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:18,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:18,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:18,493 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:18,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1143280978, now seen corresponding path program 1 times [2021-08-27 06:02:18,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:18,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733641561] [2021-08-27 06:02:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:18,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 06:02:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 06:02:18,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:18,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733641561] [2021-08-27 06:02:18,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733641561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:18,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163039559] [2021-08-27 06:02:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:18,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:18,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:18,577 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) [2021-08-27 06:02:18,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 06:02:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 06:02:18,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 06:02:18,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163039559] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:18,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:02:18,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2021-08-27 06:02:18,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130802483] [2021-08-27 06:02:18,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:02:18,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:02:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:02:18,809 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:18,870 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-08-27 06:02:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:02:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2021-08-27 06:02:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:18,871 INFO L225 Difference]: With dead ends: 68 [2021-08-27 06:02:18,872 INFO L226 Difference]: Without dead ends: 65 [2021-08-27 06:02:18,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:02:18,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-27 06:02:18,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-08-27 06:02:18,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 51 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-08-27 06:02:18,874 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 31 [2021-08-27 06:02:18,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:18,874 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-08-27 06:02:18,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-08-27 06:02:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 06:02:18,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:18,875 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:18,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:19,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:19,092 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:19,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:19,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1735380924, now seen corresponding path program 1 times [2021-08-27 06:02:19,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:19,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442254892] [2021-08-27 06:02:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:19,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:19,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:19,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 06:02:19,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:19,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442254892] [2021-08-27 06:02:19,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442254892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:19,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908525450] [2021-08-27 06:02:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:19,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:19,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:19,146 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) [2021-08-27 06:02:19,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 06:02:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 06:02:19,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 06:02:19,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908525450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:19,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:19,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-08-27 06:02:19,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325619207] [2021-08-27 06:02:19,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:02:19,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:19,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:02:19,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:02:19,333 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 06:02:19,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:19,392 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-08-27 06:02:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:02:19,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-08-27 06:02:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:19,393 INFO L225 Difference]: With dead ends: 70 [2021-08-27 06:02:19,393 INFO L226 Difference]: Without dead ends: 70 [2021-08-27 06:02:19,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:02:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-27 06:02:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2021-08-27 06:02:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 55 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-08-27 06:02:19,395 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 32 [2021-08-27 06:02:19,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:19,395 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-08-27 06:02:19,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 06:02:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-08-27 06:02:19,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-27 06:02:19,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:19,395 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:19,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:19,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-27 06:02:19,596 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2037766250, now seen corresponding path program 1 times [2021-08-27 06:02:19,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:19,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710600665] [2021-08-27 06:02:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:19,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:19,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:19,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 06:02:19,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:19,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710600665] [2021-08-27 06:02:19,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710600665] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:19,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:19,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:02:19,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519092307] [2021-08-27 06:02:19,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:02:19,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:19,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:02:19,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:02:19,681 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:19,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:19,768 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-08-27 06:02:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:02:19,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-08-27 06:02:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:19,769 INFO L225 Difference]: With dead ends: 62 [2021-08-27 06:02:19,770 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 06:02:19,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:02:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 06:02:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 06:02:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.196078431372549) internal successors, (61), 54 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-08-27 06:02:19,772 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 33 [2021-08-27 06:02:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:19,772 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-08-27 06:02:19,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-08-27 06:02:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-27 06:02:19,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:19,773 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:19,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 06:02:19,773 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:19,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1978883467, now seen corresponding path program 2 times [2021-08-27 06:02:19,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:19,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122417414] [2021-08-27 06:02:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:19,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:19,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:19,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:19,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 06:02:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 06:02:19,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:19,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122417414] [2021-08-27 06:02:19,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122417414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:19,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578742520] [2021-08-27 06:02:19,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:19,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:19,853 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) [2021-08-27 06:02:19,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 06:02:19,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:02:19,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:19,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 06:02:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:19,975 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:02:19,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 06:02:19,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-27 06:02:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-27 06:02:20,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578742520] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:20,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:02:20,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-08-27 06:02:20,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375194048] [2021-08-27 06:02:20,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:02:20,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:02:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:02:20,380 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:20,422 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-08-27 06:02:20,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:02:20,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-08-27 06:02:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:20,423 INFO L225 Difference]: With dead ends: 62 [2021-08-27 06:02:20,423 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 06:02:20,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:02:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 06:02:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-08-27 06:02:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 53 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2021-08-27 06:02:20,425 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 36 [2021-08-27 06:02:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:20,426 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2021-08-27 06:02:20,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:20,426 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2021-08-27 06:02:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 06:02:20,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:20,427 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:20,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:20,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:20,648 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:20,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1601507541, now seen corresponding path program 2 times [2021-08-27 06:02:20,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:20,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132070244] [2021-08-27 06:02:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:20,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:20,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:20,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:02:20,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:20,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132070244] [2021-08-27 06:02:20,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132070244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:20,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952846474] [2021-08-27 06:02:20,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:20,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:20,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:20,713 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) [2021-08-27 06:02:20,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 06:02:20,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:02:20,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:02:20,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:02:21,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952846474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:21,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:21,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-27 06:02:21,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510222886] [2021-08-27 06:02:21,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 06:02:21,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:21,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 06:02:21,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:02:21,006 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:21,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:21,194 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-08-27 06:02:21,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 06:02:21,195 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-08-27 06:02:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:21,196 INFO L225 Difference]: With dead ends: 93 [2021-08-27 06:02:21,196 INFO L226 Difference]: Without dead ends: 93 [2021-08-27 06:02:21,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-08-27 06:02:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-27 06:02:21,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2021-08-27 06:02:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 68 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-08-27 06:02:21,200 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 37 [2021-08-27 06:02:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:21,201 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-08-27 06:02:21,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-08-27 06:02:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-27 06:02:21,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:21,205 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 06:02:21,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:21,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:21,421 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:21,421 INFO L82 PathProgramCache]: Analyzing trace with hash 785624700, now seen corresponding path program 2 times [2021-08-27 06:02:21,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:21,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080858807] [2021-08-27 06:02:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:21,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:21,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:21,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:21,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 06:02:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 06:02:21,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:21,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080858807] [2021-08-27 06:02:21,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080858807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:21,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499710585] [2021-08-27 06:02:21,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:21,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:21,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:21,493 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) [2021-08-27 06:02:21,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 06:02:21,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 06:02:21,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:21,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:02:21,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:21,687 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:02:21,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 06:02:21,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-27 06:02:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-27 06:02:21,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499710585] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:21,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:02:21,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-08-27 06:02:21,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746677302] [2021-08-27 06:02:21,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:02:21,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:21,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:02:21,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:02:21,992 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:22,022 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-08-27 06:02:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:02:22,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2021-08-27 06:02:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:22,024 INFO L225 Difference]: With dead ends: 77 [2021-08-27 06:02:22,024 INFO L226 Difference]: Without dead ends: 77 [2021-08-27 06:02:22,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:02:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-27 06:02:22,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-08-27 06:02:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 65 states have (on average 1.123076923076923) internal successors, (73), 67 states have internal predecessors, (73), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-08-27 06:02:22,026 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 42 [2021-08-27 06:02:22,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:22,026 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-08-27 06:02:22,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:22,026 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-08-27 06:02:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 06:02:22,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:22,027 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 06:02:22,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:22,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 06:02:22,247 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:22,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:22,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1268642860, now seen corresponding path program 1 times [2021-08-27 06:02:22,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:22,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398586632] [2021-08-27 06:02:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:22,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:22,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:22,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:22,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 06:02:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 06:02:22,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:22,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398586632] [2021-08-27 06:02:22,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398586632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:22,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813280293] [2021-08-27 06:02:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:22,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:22,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:22,321 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) [2021-08-27 06:02:22,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 06:02:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:22,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:02:22,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 06:02:22,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813280293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:22,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:22,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-27 06:02:22,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654242759] [2021-08-27 06:02:22,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 06:02:22,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:22,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 06:02:22,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:02:22,674 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:22,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:22,867 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-08-27 06:02:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:02:22,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2021-08-27 06:02:22,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:22,868 INFO L225 Difference]: With dead ends: 88 [2021-08-27 06:02:22,868 INFO L226 Difference]: Without dead ends: 82 [2021-08-27 06:02:22,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:02:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-27 06:02:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-08-27 06:02:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 67 states have internal predecessors, (71), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-08-27 06:02:22,870 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 45 [2021-08-27 06:02:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:22,871 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-08-27 06:02:22,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-08-27 06:02:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 06:02:22,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:22,872 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:22,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:23,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-27 06:02:23,091 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash -190258011, now seen corresponding path program 2 times [2021-08-27 06:02:23,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:23,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859746902] [2021-08-27 06:02:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:23,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:23,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:23,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:23,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 06:02:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-27 06:02:23,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:23,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859746902] [2021-08-27 06:02:23,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859746902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:23,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512563861] [2021-08-27 06:02:23,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:23,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:23,135 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) [2021-08-27 06:02:23,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 06:02:23,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 06:02:23,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:23,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:02:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:23,400 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-27 06:02:23,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-27 06:02:23,620 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-27 06:02:23,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-27 06:02:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-08-27 06:02:23,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512563861] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:23,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:02:23,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-08-27 06:02:23,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163504160] [2021-08-27 06:02:23,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:02:23,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:23,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:02:23,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:02:23,950 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2021-08-27 06:02:23,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:23,995 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2021-08-27 06:02:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:02:23,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 50 [2021-08-27 06:02:23,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:23,996 INFO L225 Difference]: With dead ends: 75 [2021-08-27 06:02:23,997 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 06:02:23,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:02:23,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 06:02:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 06:02:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-08-27 06:02:23,999 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 50 [2021-08-27 06:02:23,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:23,999 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-08-27 06:02:23,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2021-08-27 06:02:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-08-27 06:02:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-27 06:02:24,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:24,000 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:24,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:24,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-27 06:02:24,213 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2025940537, now seen corresponding path program 3 times [2021-08-27 06:02:24,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:24,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146186050] [2021-08-27 06:02:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:24,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:24,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:24,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:24,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 06:02:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-08-27 06:02:24,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:24,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146186050] [2021-08-27 06:02:24,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146186050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:24,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340860831] [2021-08-27 06:02:24,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 06:02:24,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:24,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:24,270 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:24,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 06:02:24,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-27 06:02:24,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:24,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:02:24,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-27 06:02:24,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340860831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:24,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:24,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-08-27 06:02:24,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362086450] [2021-08-27 06:02:24,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 06:02:24,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 06:02:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:02:24,733 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 12 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 06:02:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:24,891 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2021-08-27 06:02:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:02:24,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2021-08-27 06:02:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:24,892 INFO L225 Difference]: With dead ends: 76 [2021-08-27 06:02:24,892 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 06:02:24,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-27 06:02:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 06:02:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 06:02:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 06:02:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 06:02:24,893 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2021-08-27 06:02:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:24,893 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 06:02:24,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 06:02:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 06:02:24,894 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 06:02:24,896 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr0ASSERT_VIOLATIONARRAY_INDEX [2021-08-27 06:02:24,896 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr1REQUIRES_VIOLATION [2021-08-27 06:02:24,896 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr2REQUIRES_VIOLATION [2021-08-27 06:02:24,896 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 06:02:24,897 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 06:02:24,897 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 06:02:24,897 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 06:02:24,897 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 06:02:24,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:25,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-27 06:02:25,118 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 06:02:25,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 06:02:25 BoogieIcfgContainer [2021-08-27 06:02:25,119 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 06:02:25,119 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 06:02:25,119 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 06:02:25,120 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 06:02:25,120 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:02:14" (3/4) ... [2021-08-27 06:02:25,122 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 06:02:25,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 06:02:25,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-08-27 06:02:25,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 06:02:25,130 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-08-27 06:02:25,130 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-27 06:02:25,130 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-08-27 06:02:25,130 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 06:02:25,153 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 06:02:25,153 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 06:02:25,154 INFO L168 Benchmark]: Toolchain (without parser) took 10718.70 ms. Allocated memory was 54.5 MB in the beginning and 144.7 MB in the end (delta: 90.2 MB). Free memory was 32.9 MB in the beginning and 100.1 MB in the end (delta: -67.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:25,155 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 36.1 MB in the end (delta: 44.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:02:25,155 INFO L168 Benchmark]: CACSL2BoogieTranslator took 123.98 ms. Allocated memory is still 54.5 MB. Free memory was 32.7 MB in the beginning and 23.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:25,155 INFO L168 Benchmark]: Boogie Preprocessor took 47.85 ms. Allocated memory is still 54.5 MB. Free memory was 23.8 MB in the beginning and 37.7 MB in the end (delta: -13.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:25,155 INFO L168 Benchmark]: RCFGBuilder took 324.80 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 37.5 MB in the beginning and 47.8 MB in the end (delta: -10.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:25,155 INFO L168 Benchmark]: TraceAbstraction took 10183.97 ms. Allocated memory was 67.1 MB in the beginning and 144.7 MB in the end (delta: 77.6 MB). Free memory was 47.3 MB in the beginning and 102.1 MB in the end (delta: -54.8 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:25,156 INFO L168 Benchmark]: Witness Printer took 33.64 ms. Allocated memory is still 144.7 MB. Free memory was 102.1 MB in the beginning and 100.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:25,156 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 36.1 MB in the end (delta: 44.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 123.98 ms. Allocated memory is still 54.5 MB. Free memory was 32.7 MB in the beginning and 23.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.85 ms. Allocated memory is still 54.5 MB. Free memory was 23.8 MB in the beginning and 37.7 MB in the end (delta: -13.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 324.80 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 37.5 MB in the beginning and 47.8 MB in the end (delta: -10.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10183.97 ms. Allocated memory was 67.1 MB in the beginning and 144.7 MB in the end (delta: 77.6 MB). Free memory was 47.3 MB in the beginning and 102.1 MB in the end (delta: -54.8 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. * Witness Printer took 33.64 ms. Allocated memory is still 144.7 MB. Free memory was 102.1 MB in the beginning and 100.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 10134.1ms, OverallIterations: 18, TraceHistogramMax: 6, EmptinessCheckTime: 20.1ms, AutomataDifference: 1975.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 426 SDtfs, 744 SDslu, 762 SDs, 0 SdLazy, 1722 SolverSat, 129 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1035.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 574 GetRequests, 417 SyntacticMatches, 14 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1214.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=14, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.1ms AutomataMinimizationTime, 18 MinimizatonAttempts, 117 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 85.1ms SsaConstructionTime, 284.1ms SatisfiabilityAnalysisTime, 3905.1ms InterpolantComputationTime, 899 NumberOfCodeBlocks, 799 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 870 ConstructedInterpolants, 106 QuantifiedInterpolants, 4152 SizeOfPredicates, 15 NumberOfNonLiveVariables, 1110 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 29 InterpolantComputations, 13 PerfectInterpolantSequences, 453/506 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 06:02:25,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...