./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.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/ArraysOfVariableLength.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 a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 06:01:09,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:01:09,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:01:09,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:01:09,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:01:09,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:01:09,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:01:09,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:01:09,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:01:09,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:01:09,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:01:09,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:01:09,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:01:09,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:01:09,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:01:09,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:01:09,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:01:09,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:01:09,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:01:09,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:01:09,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:01:09,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:01:09,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:01:09,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:01:09,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:01:09,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:01:09,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:01:09,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:01:09,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:01:09,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:01:09,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:01:09,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:01:09,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:01:09,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:01:09,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:01:09,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:01:09,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:01:09,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:01:09,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:01:09,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:01:09,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:01:09,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 06:01:09,400 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:01:09,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:01:09,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:01:09,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:01:09,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:01:09,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:01:09,404 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:01:09,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:01:09,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:01:09,405 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:01:09,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:01:09,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:01:09,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:01:09,407 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:01:09,407 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:01:09,407 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:01:09,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:01:09,407 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:01:09,408 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:01:09,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:01:09,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:01:09,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:01:09,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:01:09,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:01:09,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:01:09,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:01:09,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 06:01:09,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 06:01:09,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:01:09,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 [2021-08-27 06:01:09,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:01:09,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:01:09,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:01:09,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:01:09,806 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:01:09,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2021-08-27 06:01:09,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78cfa6c6c/ecf4ea0aaa6042f482c48c9dc2034de7/FLAG6a0c93754 [2021-08-27 06:01:10,308 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:01:10,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2021-08-27 06:01:10,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78cfa6c6c/ecf4ea0aaa6042f482c48c9dc2034de7/FLAG6a0c93754 [2021-08-27 06:01:10,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78cfa6c6c/ecf4ea0aaa6042f482c48c9dc2034de7 [2021-08-27 06:01:10,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:01:10,740 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:01:10,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:01:10,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:01:10,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:01:10,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:01:10" (1/1) ... [2021-08-27 06:01:10,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10cec6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:10, skipping insertion in model container [2021-08-27 06:01:10,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:01:10" (1/1) ... [2021-08-27 06:01:10,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:01:10,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:01:10,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:01:10,881 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:01:10,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:01:10,905 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:01:10,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:10 WrapperNode [2021-08-27 06:01:10,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:01:10,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:01:10,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:01:10,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:01:10,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:10" (1/1) ... [2021-08-27 06:01:10,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:10" (1/1) ... [2021-08-27 06:01:10,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:10" (1/1) ... [2021-08-27 06:01:10,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:10" (1/1) ... [2021-08-27 06:01:10,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:10" (1/1) ... [2021-08-27 06:01:10,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:10" (1/1) ... [2021-08-27 06:01:10,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:10" (1/1) ... [2021-08-27 06:01:10,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:01:10,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:01:10,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:01:10,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:01:10,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:10" (1/1) ... [2021-08-27 06:01:10,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:01:10,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:11,012 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 06:01:11,035 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 06:01:11,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:01:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:01:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-27 06:01:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:01:11,064 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-27 06:01:11,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 06:01:11,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:01:11,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:01:11,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 06:01:11,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:01:11,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:01:11,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:01:11,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:01:11,397 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 06:01:11,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:01:11 BoogieIcfgContainer [2021-08-27 06:01:11,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:01:11,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:01:11,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:01:11,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:01:11,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:01:10" (1/3) ... [2021-08-27 06:01:11,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3fb056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:01:11, skipping insertion in model container [2021-08-27 06:01:11,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:10" (2/3) ... [2021-08-27 06:01:11,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3fb056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:01:11, skipping insertion in model container [2021-08-27 06:01:11,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:01:11" (3/3) ... [2021-08-27 06:01:11,413 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2021-08-27 06:01:11,418 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:01:11,418 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-08-27 06:01:11,463 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:01:11,470 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 06:01:11,470 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-27 06:01:11,488 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 06:01:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:01:11,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:11,495 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:11,495 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 06:01:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:11,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-08-27 06:01:11,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:11,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775695761] [2021-08-27 06:01:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:11,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:11,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:11,671 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 06:01:11,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:11,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775695761] [2021-08-27 06:01:11,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775695761] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:11,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:01:11,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:01:11,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927502519] [2021-08-27 06:01:11,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:01:11,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:11,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:01:11,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:01:11,692 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 06:01:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:11,919 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-08-27 06:01:11,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:01:11,921 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 06:01:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:11,928 INFO L225 Difference]: With dead ends: 58 [2021-08-27 06:01:11,929 INFO L226 Difference]: Without dead ends: 54 [2021-08-27 06:01:11,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:01:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-27 06:01:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-08-27 06:01:11,987 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 06:01:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-27 06:01:12,005 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-08-27 06:01:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:12,006 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-27 06:01:12,006 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 06:01:12,007 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-27 06:01:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 06:01:12,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:12,007 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:12,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 06:01:12,008 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 06:01:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:12,009 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-08-27 06:01:12,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:12,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732238020] [2021-08-27 06:01:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:12,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:12,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:12,149 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 06:01:12,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:12,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732238020] [2021-08-27 06:01:12,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732238020] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:12,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:01:12,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:01:12,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220232746] [2021-08-27 06:01:12,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:01:12,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:12,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:01:12,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:01:12,155 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 06:01:12,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:12,406 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-08-27 06:01:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:01:12,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2021-08-27 06:01:12,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:12,408 INFO L225 Difference]: With dead ends: 59 [2021-08-27 06:01:12,408 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 06:01:12,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:01:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 06:01:12,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2021-08-27 06:01:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 38 states have internal predecessors, (41), 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 06:01:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-08-27 06:01:12,415 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2021-08-27 06:01:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:12,415 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-08-27 06:01:12,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 06:01:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-08-27 06:01:12,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 06:01:12,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:12,416 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:12,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 06:01:12,417 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:12,418 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-08-27 06:01:12,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:12,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683574362] [2021-08-27 06:01:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:12,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:12,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:12,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:12,480 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 06:01:12,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:12,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683574362] [2021-08-27 06:01:12,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683574362] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:12,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:01:12,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:01:12,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015147916] [2021-08-27 06:01:12,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:01:12,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:12,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:01:12,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:01:12,483 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 06:01:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:12,584 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-08-27 06:01:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:01:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 15 [2021-08-27 06:01:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:12,592 INFO L225 Difference]: With dead ends: 43 [2021-08-27 06:01:12,593 INFO L226 Difference]: Without dead ends: 43 [2021-08-27 06:01:12,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:01:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-27 06:01:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-27 06:01:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.3) internal successors, (39), 36 states have internal predecessors, (39), 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 06:01:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-08-27 06:01:12,609 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2021-08-27 06:01:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:12,609 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-08-27 06:01:12,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 06:01:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-08-27 06:01:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 06:01:12,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:12,610 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:12,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 06:01:12,611 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:12,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:12,611 INFO L82 PathProgramCache]: Analyzing trace with hash 143250927, now seen corresponding path program 1 times [2021-08-27 06:01:12,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:12,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535858073] [2021-08-27 06:01:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:12,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:12,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:12,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:12,706 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 06:01:12,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:12,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535858073] [2021-08-27 06:01:12,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535858073] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:12,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:01:12,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:01:12,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576452271] [2021-08-27 06:01:12,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:01:12,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:01:12,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:01:12,709 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 06:01:12,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:12,821 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-08-27 06:01:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:01:12,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 15 [2021-08-27 06:01:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:12,824 INFO L225 Difference]: With dead ends: 47 [2021-08-27 06:01:12,824 INFO L226 Difference]: Without dead ends: 47 [2021-08-27 06:01:12,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:01:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-27 06:01:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-08-27 06:01:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 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 06:01:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-08-27 06:01:12,833 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2021-08-27 06:01:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:12,834 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-08-27 06:01:12,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 06:01:12,834 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-08-27 06:01:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:01:12,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:12,835 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] [2021-08-27 06:01:12,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 06:01:12,837 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:12,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1902162976, now seen corresponding path program 1 times [2021-08-27 06:01:12,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:12,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346439681] [2021-08-27 06:01:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:12,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:12,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:12,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:12,957 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 06:01:12,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:12,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346439681] [2021-08-27 06:01:12,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346439681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:12,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811987785] [2021-08-27 06:01:12,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:12,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:12,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:12,960 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 06:01:12,961 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 06:01:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:01:13,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:13,257 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 06:01:13,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811987785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:13,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:13,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 06:01:13,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316857745] [2021-08-27 06:01:13,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:01:13,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:13,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:01:13,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:01:13,261 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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 06:01:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:13,372 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-08-27 06:01:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:01:13,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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 21 [2021-08-27 06:01:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:13,376 INFO L225 Difference]: With dead ends: 69 [2021-08-27 06:01:13,376 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 06:01:13,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:01:13,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 06:01:13,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-08-27 06:01:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 44 states have internal predecessors, (50), 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 06:01:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-08-27 06:01:13,395 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 21 [2021-08-27 06:01:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:13,399 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-08-27 06:01:13,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 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 06:01:13,400 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-08-27 06:01:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 06:01:13,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:13,402 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:13,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-27 06:01:13,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:13,630 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 06:01:13,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:13,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1165178250, now seen corresponding path program 1 times [2021-08-27 06:01:13,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:13,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501599653] [2021-08-27 06:01:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:13,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:13,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:13,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:13,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:13,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501599653] [2021-08-27 06:01:13,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501599653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:13,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939003802] [2021-08-27 06:01:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:13,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:13,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:13,717 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 06:01:13,732 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 06:01:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:13,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:01:13,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:13,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939003802] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:13,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:01:13,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-08-27 06:01:13,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91768699] [2021-08-27 06:01:13,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:01:13,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:01:13,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:01:13,949 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 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 06:01:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:14,074 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-08-27 06:01:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:01:14,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 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 22 [2021-08-27 06:01:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:14,077 INFO L225 Difference]: With dead ends: 66 [2021-08-27 06:01:14,077 INFO L226 Difference]: Without dead ends: 66 [2021-08-27 06:01:14,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:01:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-27 06:01:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-08-27 06:01:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 46 states have internal predecessors, (53), 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 06:01:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-08-27 06:01:14,092 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 22 [2021-08-27 06:01:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:14,092 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-08-27 06:01:14,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 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 06:01:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-08-27 06:01:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 06:01:14,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:14,094 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:14,121 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 06:01:14,319 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,SelfDestructingSolverStorable5 [2021-08-27 06:01:14,320 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:14,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787427, now seen corresponding path program 1 times [2021-08-27 06:01:14,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:14,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320119859] [2021-08-27 06:01:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:14,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:14,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:14,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:14,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:14,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320119859] [2021-08-27 06:01:14,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320119859] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:14,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:01:14,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:01:14,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597399352] [2021-08-27 06:01:14,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:01:14,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:01:14,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:01:14,377 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 3 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 06:01:14,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:14,461 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-08-27 06:01:14,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:01:14,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 3 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 23 [2021-08-27 06:01:14,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:14,462 INFO L225 Difference]: With dead ends: 53 [2021-08-27 06:01:14,462 INFO L226 Difference]: Without dead ends: 53 [2021-08-27 06:01:14,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:01:14,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-27 06:01:14,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-08-27 06:01:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 45 states have internal predecessors, (52), 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 06:01:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-08-27 06:01:14,471 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 23 [2021-08-27 06:01:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:14,471 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-08-27 06:01:14,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 3 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 06:01:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-08-27 06:01:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 06:01:14,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:14,473 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:14,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 06:01:14,474 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:14,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787428, now seen corresponding path program 1 times [2021-08-27 06:01:14,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:14,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258405790] [2021-08-27 06:01:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:14,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:14,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:14,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 06:01:14,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:14,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258405790] [2021-08-27 06:01:14,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258405790] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:14,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:01:14,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:01:14,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894432172] [2021-08-27 06:01:14,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:01:14,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:14,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:01:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:01:14,620 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 06:01:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:14,740 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-08-27 06:01:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:01:14,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 23 [2021-08-27 06:01:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:14,744 INFO L225 Difference]: With dead ends: 59 [2021-08-27 06:01:14,744 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 06:01:14,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:01:14,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 06:01:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-08-27 06:01:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 46 states have internal predecessors, (53), 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 06:01:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-08-27 06:01:14,754 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 23 [2021-08-27 06:01:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:14,756 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-08-27 06:01:14,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 06:01:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-08-27 06:01:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 06:01:14,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:14,757 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:14,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 06:01:14,761 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:14,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:14,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1134972881, now seen corresponding path program 1 times [2021-08-27 06:01:14,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:14,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817731072] [2021-08-27 06:01:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:14,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:14,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:14,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:14,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 06:01:14,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:14,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817731072] [2021-08-27 06:01:14,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817731072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:14,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147470719] [2021-08-27 06:01:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:14,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:14,873 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 06:01:14,901 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 06:01:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:14,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 06:01:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:01:15,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147470719] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:15,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:01:15,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2021-08-27 06:01:15,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967401078] [2021-08-27 06:01:15,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:01:15,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:15,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:01:15,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:01:15,099 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 06:01:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:15,184 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-08-27 06:01:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:01:15,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 26 [2021-08-27 06:01:15,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:15,185 INFO L225 Difference]: With dead ends: 63 [2021-08-27 06:01:15,185 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 06:01:15,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:01:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 06:01:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-08-27 06:01:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 46 states have internal predecessors, (52), 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 06:01:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-08-27 06:01:15,189 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 26 [2021-08-27 06:01:15,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:15,189 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-08-27 06:01:15,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 06:01:15,189 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-08-27 06:01:15,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 06:01:15,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:15,190 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:15,213 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 06:01:15,400 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 06:01:15,401 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:15,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1992931931, now seen corresponding path program 1 times [2021-08-27 06:01:15,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:15,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175947673] [2021-08-27 06:01:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:15,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:15,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:15,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:15,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:15,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175947673] [2021-08-27 06:01:15,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175947673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:15,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693476457] [2021-08-27 06:01:15,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:15,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:15,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:15,501 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 06:01:15,502 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 06:01:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:15,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:01:15,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:15,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693476457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:15,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:15,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-27 06:01:15,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711426062] [2021-08-27 06:01:15,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 06:01:15,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:15,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 06:01:15,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:01:15,755 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 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 06:01:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:15,997 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2021-08-27 06:01:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:01:16,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 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 27 [2021-08-27 06:01:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:16,006 INFO L225 Difference]: With dead ends: 81 [2021-08-27 06:01:16,006 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 06:01:16,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:01:16,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 06:01:16,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-08-27 06:01:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.196078431372549) internal successors, (61), 56 states have internal predecessors, (61), 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 06:01:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-08-27 06:01:16,014 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 27 [2021-08-27 06:01:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:16,014 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-08-27 06:01:16,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 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 06:01:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-08-27 06:01:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 06:01:16,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:16,020 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 06:01:16,045 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 06:01:16,244 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 06:01:16,245 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:16,245 INFO L82 PathProgramCache]: Analyzing trace with hash -790766996, now seen corresponding path program 1 times [2021-08-27 06:01:16,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:16,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962119743] [2021-08-27 06:01:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:16,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:16,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:16,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:16,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 06:01:16,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:16,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962119743] [2021-08-27 06:01:16,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962119743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:16,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886779178] [2021-08-27 06:01:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:16,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:16,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:16,334 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 06:01:16,338 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 06:01:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:16,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:01:16,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:16,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:01:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 06:01:16,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886779178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:16,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:16,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 06:01:16,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279335698] [2021-08-27 06:01:16,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:01:16,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:16,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:01:16,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:01:16,880 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 06:01:17,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:17,023 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-08-27 06:01:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:01:17,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 31 [2021-08-27 06:01:17,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:17,024 INFO L225 Difference]: With dead ends: 69 [2021-08-27 06:01:17,025 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 06:01:17,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:01:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 06:01:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-08-27 06:01:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 57 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-08-27 06:01:17,027 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 31 [2021-08-27 06:01:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:17,027 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-08-27 06:01:17,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 06:01:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-08-27 06:01:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 06:01:17,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:17,028 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:17,048 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 06:01:17,228 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 06:01:17,229 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:17,229 INFO L82 PathProgramCache]: Analyzing trace with hash 894123677, now seen corresponding path program 1 times [2021-08-27 06:01:17,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:17,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662761111] [2021-08-27 06:01:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:17,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:17,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:17,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:17,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-27 06:01:17,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:17,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662761111] [2021-08-27 06:01:17,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662761111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:17,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743667101] [2021-08-27 06:01:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:17,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:17,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:17,317 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 06:01:17,344 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 06:01:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:17,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 06:01:17,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 06:01:17,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743667101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:17,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:17,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-27 06:01:17,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064174236] [2021-08-27 06:01:17,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 06:01:17,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:17,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 06:01:17,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:01:17,600 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:17,739 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-08-27 06:01:17,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:01:17,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2021-08-27 06:01:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:17,741 INFO L225 Difference]: With dead ends: 94 [2021-08-27 06:01:17,741 INFO L226 Difference]: Without dead ends: 94 [2021-08-27 06:01:17,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:01:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-27 06:01:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-08-27 06:01:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 64 states have internal predecessors, (71), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:17,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-08-27 06:01:17,745 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 37 [2021-08-27 06:01:17,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:17,745 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-08-27 06:01:17,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:17,745 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-08-27 06:01:17,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 06:01:17,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:17,747 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:17,775 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 06:01:17,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:17,974 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:17,974 INFO L82 PathProgramCache]: Analyzing trace with hash -174164318, now seen corresponding path program 2 times [2021-08-27 06:01:17,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:17,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675388856] [2021-08-27 06:01:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:17,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:18,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:18,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:18,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 06:01:18,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:18,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675388856] [2021-08-27 06:01:18,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675388856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:18,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118329079] [2021-08-27 06:01:18,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:01:18,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:18,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:18,087 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 06:01:18,096 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 06:01:18,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:01:18,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:01:18,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:01:18,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-27 06:01:18,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118329079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:18,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:18,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-08-27 06:01:18,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071424337] [2021-08-27 06:01:18,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 06:01:18,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:18,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 06:01:18,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:01:18,432 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 06:01:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:18,849 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-08-27 06:01:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 06:01:18,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2021-08-27 06:01:18,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:18,851 INFO L225 Difference]: With dead ends: 86 [2021-08-27 06:01:18,851 INFO L226 Difference]: Without dead ends: 86 [2021-08-27 06:01:18,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-08-27 06:01:18,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-27 06:01:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2021-08-27 06:01:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 63 states have internal predecessors, (70), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-08-27 06:01:18,854 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 43 [2021-08-27 06:01:18,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:18,854 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-08-27 06:01:18,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 06:01:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-08-27 06:01:18,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 06:01:18,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:18,855 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] [2021-08-27 06:01:18,885 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 06:01:19,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:19,077 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:19,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1104126516, now seen corresponding path program 1 times [2021-08-27 06:01:19,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:19,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855329985] [2021-08-27 06:01:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:19,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:19,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:19,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:19,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-27 06:01:19,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:19,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855329985] [2021-08-27 06:01:19,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855329985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:19,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677704131] [2021-08-27 06:01:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:19,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:19,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:19,199 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 06:01:19,202 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 06:01:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:19,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 06:01:19,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:19,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:01:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-27 06:01:19,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677704131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:19,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:19,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-27 06:01:19,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253496295] [2021-08-27 06:01:19,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 06:01:19,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:19,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 06:01:19,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:01:19,752 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 06:01:19,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:19,904 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2021-08-27 06:01:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:01:19,905 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2021-08-27 06:01:19,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:19,905 INFO L225 Difference]: With dead ends: 83 [2021-08-27 06:01:19,906 INFO L226 Difference]: Without dead ends: 83 [2021-08-27 06:01:19,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:01:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-27 06:01:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2021-08-27 06:01:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 68 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-08-27 06:01:19,911 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 44 [2021-08-27 06:01:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:19,912 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-08-27 06:01:19,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 06:01:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-08-27 06:01:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 06:01:19,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:19,915 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:19,943 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 06:01:20,139 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,SelfDestructingSolverStorable13 [2021-08-27 06:01:20,140 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2073773289, now seen corresponding path program 2 times [2021-08-27 06:01:20,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:20,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765279217] [2021-08-27 06:01:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:20,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:20,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:20,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:20,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:20,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 06:01:20,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:20,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765279217] [2021-08-27 06:01:20,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765279217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:20,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039974437] [2021-08-27 06:01:20,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:01:20,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:20,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:20,315 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 06:01:20,316 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 06:01:20,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:01:20,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:01:20,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:01:20,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 06:01:20,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039974437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:20,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:20,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-27 06:01:20,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658509968] [2021-08-27 06:01:20,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 06:01:20,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 06:01:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-27 06:01:20,697 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 06:01:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:21,036 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2021-08-27 06:01:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 06:01:21,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2021-08-27 06:01:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:21,038 INFO L225 Difference]: With dead ends: 90 [2021-08-27 06:01:21,038 INFO L226 Difference]: Without dead ends: 87 [2021-08-27 06:01:21,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-27 06:01:21,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-27 06:01:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2021-08-27 06:01:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-08-27 06:01:21,041 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 47 [2021-08-27 06:01:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:21,042 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-08-27 06:01:21,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 06:01:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-08-27 06:01:21,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 06:01:21,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:21,043 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:21,068 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 06:01:21,265 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,SelfDestructingSolverStorable14 [2021-08-27 06:01:21,266 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:21,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1407287743, now seen corresponding path program 2 times [2021-08-27 06:01:21,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:21,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177020007] [2021-08-27 06:01:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:21,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:21,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:21,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:21,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-27 06:01:21,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:21,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177020007] [2021-08-27 06:01:21,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177020007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:21,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698288040] [2021-08-27 06:01:21,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:01:21,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:21,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:21,417 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 06:01:21,440 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 06:01:21,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 06:01:21,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:01:21,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 06:01:21,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:21,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:01:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-27 06:01:22,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698288040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:22,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:22,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-27 06:01:22,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506213284] [2021-08-27 06:01:22,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 06:01:22,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:22,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 06:01:22,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:01:22,121 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:22,515 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2021-08-27 06:01:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 06:01:22,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2021-08-27 06:01:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:22,517 INFO L225 Difference]: With dead ends: 107 [2021-08-27 06:01:22,517 INFO L226 Difference]: Without dead ends: 107 [2021-08-27 06:01:22,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-08-27 06:01:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-27 06:01:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2021-08-27 06:01:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 88 states have internal predecessors, (99), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2021-08-27 06:01:22,521 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 49 [2021-08-27 06:01:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:22,521 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2021-08-27 06:01:22,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:22,522 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2021-08-27 06:01:22,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 06:01:22,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:22,523 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:22,545 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 06:01:22,737 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,SelfDestructingSolverStorable15 [2021-08-27 06:01:22,737 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:22,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1381084076, now seen corresponding path program 3 times [2021-08-27 06:01:22,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:22,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349502592] [2021-08-27 06:01:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:22,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:22,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:22,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:22,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:22,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-08-27 06:01:22,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:22,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349502592] [2021-08-27 06:01:22,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349502592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:22,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424003654] [2021-08-27 06:01:22,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 06:01:22,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:22,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:22,865 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 06:01:22,866 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 06:01:23,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-27 06:01:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:01:23,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 06:01:23,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:23,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:01:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-27 06:01:23,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424003654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:23,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:23,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-08-27 06:01:23,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799809920] [2021-08-27 06:01:23,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 06:01:23,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:23,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 06:01:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:01:23,638 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 13 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 06:01:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:23,951 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-08-27 06:01:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 06:01:23,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-08-27 06:01:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:23,953 INFO L225 Difference]: With dead ends: 109 [2021-08-27 06:01:23,954 INFO L226 Difference]: Without dead ends: 109 [2021-08-27 06:01:23,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-27 06:01:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-27 06:01:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-08-27 06:01:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 87 states have (on average 1.103448275862069) internal successors, (96), 88 states have internal predecessors, (96), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-08-27 06:01:23,958 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 52 [2021-08-27 06:01:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:23,959 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-08-27 06:01:23,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 06:01:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-08-27 06:01:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-27 06:01:23,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:23,960 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:23,986 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 06:01:24,183 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,SelfDestructingSolverStorable16 [2021-08-27 06:01:24,184 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:24,184 INFO L82 PathProgramCache]: Analyzing trace with hash 267240299, now seen corresponding path program 1 times [2021-08-27 06:01:24,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:24,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855447349] [2021-08-27 06:01:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:24,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:24,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:24,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:24,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:24,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:24,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-27 06:01:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-27 06:01:24,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:24,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855447349] [2021-08-27 06:01:24,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855447349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:24,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101332089] [2021-08-27 06:01:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:24,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:24,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:24,298 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:24,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 06:01:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:24,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 06:01:24,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 91 proven. 7 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-08-27 06:01:25,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101332089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:25,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:25,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-27 06:01:25,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687164008] [2021-08-27 06:01:25,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 06:01:25,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 06:01:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:01:25,042 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 06:01:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:25,489 INFO L93 Difference]: Finished difference Result 157 states and 164 transitions. [2021-08-27 06:01:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 06:01:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 82 [2021-08-27 06:01:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:25,494 INFO L225 Difference]: With dead ends: 157 [2021-08-27 06:01:25,494 INFO L226 Difference]: Without dead ends: 154 [2021-08-27 06:01:25,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-08-27 06:01:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-27 06:01:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2021-08-27 06:01:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 100 states have (on average 1.1) internal successors, (110), 101 states have internal predecessors, (110), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 06:01:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2021-08-27 06:01:25,500 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 82 [2021-08-27 06:01:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:25,500 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2021-08-27 06:01:25,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 06:01:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2021-08-27 06:01:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-08-27 06:01:25,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:25,502 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:25,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:25,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-27 06:01:25,731 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:25,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:25,731 INFO L82 PathProgramCache]: Analyzing trace with hash -311092151, now seen corresponding path program 2 times [2021-08-27 06:01:25,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:25,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678740165] [2021-08-27 06:01:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:25,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:25,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:25,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:25,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:25,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:25,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-27 06:01:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:25,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-27 06:01:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-08-27 06:01:25,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:25,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678740165] [2021-08-27 06:01:25,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678740165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:25,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949702473] [2021-08-27 06:01:25,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:01:25,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:25,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:25,861 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:25,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 06:01:26,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 06:01:26,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:01:26,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 06:01:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:26,234 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-08-27 06:01:26,316 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-08-27 06:01:26,416 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-08-27 06:01:26,613 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-08-27 06:01:26,753 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-08-27 06:01:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-08-27 06:01:26,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949702473] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:26,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:01:26,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-08-27 06:01:26,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026618985] [2021-08-27 06:01:26,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:01:26,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:26,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:01:26,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:01:26,943 INFO L87 Difference]: Start difference. First operand 114 states and 123 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 06:01:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:27,008 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-08-27 06:01:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:01:27,010 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 113 [2021-08-27 06:01:27,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:27,011 INFO L225 Difference]: With dead ends: 113 [2021-08-27 06:01:27,011 INFO L226 Difference]: Without dead ends: 110 [2021-08-27 06:01:27,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-27 06:01:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-27 06:01:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-08-27 06:01:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 06:01:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-08-27 06:01:27,015 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 113 [2021-08-27 06:01:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:27,015 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-08-27 06:01:27,015 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 06:01:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-08-27 06:01:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-08-27 06:01:27,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:27,016 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:27,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-27 06:01:27,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:27,225 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:27,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:27,226 INFO L82 PathProgramCache]: Analyzing trace with hash 419498507, now seen corresponding path program 1 times [2021-08-27 06:01:27,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:27,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847884621] [2021-08-27 06:01:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:27,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:27,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:27,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:27,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:27,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:27,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-27 06:01:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:27,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-27 06:01:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-08-27 06:01:27,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:27,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847884621] [2021-08-27 06:01:27,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847884621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:27,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989966112] [2021-08-27 06:01:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:27,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:27,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:27,365 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:27,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 06:01:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-27 06:01:27,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 189 proven. 18 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-08-27 06:01:28,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989966112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:28,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:28,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-08-27 06:01:28,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547177588] [2021-08-27 06:01:28,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 06:01:28,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 06:01:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-27 06:01:28,378 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-08-27 06:01:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:28,876 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2021-08-27 06:01:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 06:01:28,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 126 [2021-08-27 06:01:28,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:28,878 INFO L225 Difference]: With dead ends: 191 [2021-08-27 06:01:28,878 INFO L226 Difference]: Without dead ends: 191 [2021-08-27 06:01:28,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 06:01:28,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-27 06:01:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 138. [2021-08-27 06:01:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 123 states have (on average 1.048780487804878) internal successors, (129), 123 states have internal predecessors, (129), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 06:01:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2021-08-27 06:01:28,886 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 126 [2021-08-27 06:01:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:28,886 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2021-08-27 06:01:28,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-08-27 06:01:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2021-08-27 06:01:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-08-27 06:01:28,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:28,888 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:28,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:29,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:29,113 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:29,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1289574162, now seen corresponding path program 2 times [2021-08-27 06:01:29,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:29,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113963708] [2021-08-27 06:01:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:29,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:29,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:29,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:29,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:29,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:29,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-27 06:01:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:29,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-27 06:01:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:29,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-27 06:01:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2021-08-27 06:01:29,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:29,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113963708] [2021-08-27 06:01:29,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113963708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:29,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100334346] [2021-08-27 06:01:29,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:01:29,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:29,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:29,269 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:29,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 06:01:29,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:01:29,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:01:29,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 06:01:29,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 346 proven. 34 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-08-27 06:01:30,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100334346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:30,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:30,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-27 06:01:30,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189794457] [2021-08-27 06:01:30,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 06:01:30,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:30,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 06:01:30,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-08-27 06:01:30,414 INFO L87 Difference]: Start difference. First operand 138 states and 144 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 21 states have internal predecessors, (106), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-27 06:01:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:31,055 INFO L93 Difference]: Finished difference Result 260 states and 276 transitions. [2021-08-27 06:01:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-27 06:01:31,056 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 21 states have internal predecessors, (106), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 162 [2021-08-27 06:01:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:31,058 INFO L225 Difference]: With dead ends: 260 [2021-08-27 06:01:31,058 INFO L226 Difference]: Without dead ends: 260 [2021-08-27 06:01:31,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 06:01:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-08-27 06:01:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 174. [2021-08-27 06:01:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 157 states have (on average 1.0573248407643312) internal successors, (166), 157 states have internal predecessors, (166), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 06:01:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 183 transitions. [2021-08-27 06:01:31,068 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 183 transitions. Word has length 162 [2021-08-27 06:01:31,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:31,069 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 183 transitions. [2021-08-27 06:01:31,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 21 states have internal predecessors, (106), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-27 06:01:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 183 transitions. [2021-08-27 06:01:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-08-27 06:01:31,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:31,071 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:31,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:31,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:31,272 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:31,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1415289466, now seen corresponding path program 3 times [2021-08-27 06:01:31,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:31,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434127721] [2021-08-27 06:01:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:31,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:31,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:31,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:31,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:31,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:31,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-27 06:01:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:31,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-27 06:01:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:31,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-27 06:01:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:31,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-08-27 06:01:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2021-08-27 06:01:31,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:31,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434127721] [2021-08-27 06:01:31,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434127721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:31,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330899809] [2021-08-27 06:01:31,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 06:01:31,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:31,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:31,473 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:31,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 06:01:32,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-27 06:01:32,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:01:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 06:01:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:32,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:01:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2021-08-27 06:01:33,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330899809] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:33,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:01:33,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2021-08-27 06:01:33,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008920766] [2021-08-27 06:01:33,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:01:33,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:33,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:01:33,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:01:33,236 INFO L87 Difference]: Start difference. First operand 174 states and 183 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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 06:01:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:33,273 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2021-08-27 06:01:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:01:33,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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 203 [2021-08-27 06:01:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:33,274 INFO L225 Difference]: With dead ends: 173 [2021-08-27 06:01:33,274 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 06:01:33,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 201 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:01:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 06:01:33,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 06:01:33,275 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 06:01:33,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 06:01:33,275 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 203 [2021-08-27 06:01:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:33,275 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 06:01:33,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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 06:01:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 06:01:33,275 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 06:01:33,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr0ASSERT_VIOLATIONARRAY_INDEX [2021-08-27 06:01:33,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr1REQUIRES_VIOLATION [2021-08-27 06:01:33,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr2REQUIRES_VIOLATION [2021-08-27 06:01:33,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 06:01:33,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 06:01:33,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 06:01:33,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 06:01:33,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 06:01:33,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:33,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-27 06:01:33,504 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 06:01:33,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 06:01:33 BoogieIcfgContainer [2021-08-27 06:01:33,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 06:01:33,507 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 06:01:33,507 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 06:01:33,507 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 06:01:33,507 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:01:11" (3/4) ... [2021-08-27 06:01:33,510 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 06:01:33,516 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 06:01:33,516 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-08-27 06:01:33,516 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 06:01:33,519 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-08-27 06:01:33,520 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-27 06:01:33,520 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-27 06:01:33,520 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 06:01:33,545 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 06:01:33,545 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 06:01:33,546 INFO L168 Benchmark]: Toolchain (without parser) took 22805.47 ms. Allocated memory was 58.7 MB in the beginning and 285.2 MB in the end (delta: 226.5 MB). Free memory was 37.8 MB in the beginning and 227.8 MB in the end (delta: -190.1 MB). Peak memory consumption was 34.8 MB. Max. memory is 16.1 GB. [2021-08-27 06:01:33,547 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:01:33,547 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.31 ms. Allocated memory is still 58.7 MB. Free memory was 37.6 MB in the beginning and 28.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 06:01:33,547 INFO L168 Benchmark]: Boogie Preprocessor took 65.13 ms. Allocated memory is still 58.7 MB. Free memory was 28.5 MB in the beginning and 42.2 MB in the end (delta: -13.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:01:33,548 INFO L168 Benchmark]: RCFGBuilder took 426.26 ms. Allocated memory is still 58.7 MB. Free memory was 42.2 MB in the beginning and 26.7 MB in the end (delta: 15.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 06:01:33,548 INFO L168 Benchmark]: TraceAbstraction took 22099.12 ms. Allocated memory was 77.6 MB in the beginning and 285.2 MB in the end (delta: 207.6 MB). Free memory was 60.4 MB in the beginning and 230.6 MB in the end (delta: -170.2 MB). Peak memory consumption was 36.7 MB. Max. memory is 16.1 GB. [2021-08-27 06:01:33,548 INFO L168 Benchmark]: Witness Printer took 38.24 ms. Allocated memory is still 285.2 MB. Free memory was 230.6 MB in the beginning and 227.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:01:33,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 163.31 ms. Allocated memory is still 58.7 MB. Free memory was 37.6 MB in the beginning and 28.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.13 ms. Allocated memory is still 58.7 MB. Free memory was 28.5 MB in the beginning and 42.2 MB in the end (delta: -13.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 426.26 ms. Allocated memory is still 58.7 MB. Free memory was 42.2 MB in the beginning and 26.7 MB in the end (delta: 15.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22099.12 ms. Allocated memory was 77.6 MB in the beginning and 285.2 MB in the end (delta: 207.6 MB). Free memory was 60.4 MB in the beginning and 230.6 MB in the end (delta: -170.2 MB). Peak memory consumption was 36.7 MB. Max. memory is 16.1 GB. * Witness Printer took 38.24 ms. Allocated memory is still 285.2 MB. Free memory was 230.6 MB in the beginning and 227.8 MB in the end (delta: 2.8 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: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: 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: 22043.5ms, OverallIterations: 22, TraceHistogramMax: 20, EmptinessCheckTime: 36.9ms, AutomataDifference: 5160.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 530 SDtfs, 1939 SDslu, 1373 SDs, 0 SdLazy, 4287 SolverSat, 472 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2633.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1442 GetRequests, 1128 SyntacticMatches, 38 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 3134.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=21, InterpolantAutomatonStates: 208, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 197.7ms AutomataMinimizationTime, 22 MinimizatonAttempts, 334 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 199.2ms SsaConstructionTime, 659.5ms SatisfiabilityAnalysisTime, 8745.4ms InterpolantComputationTime, 2267 NumberOfCodeBlocks, 1931 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 2229 ConstructedInterpolants, 281 QuantifiedInterpolants, 8285 SizeOfPredicates, 26 NumberOfNonLiveVariables, 2567 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 38 InterpolantComputations, 10 PerfectInterpolantSequences, 5873/6426 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 06:01:33,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...