./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.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/ArraysOfVariableLength6.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 07b05923cf5c1b39a35ab81b524575a0a488c268 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 06:02:04,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:02:04,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:02:04,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:02:04,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:02:04,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:02:04,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:02:04,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:02:04,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:02:04,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:02:04,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:02:04,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:02:04,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:02:04,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:02:04,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:02:04,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:02:04,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:02:04,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:02:04,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:02:04,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:02:04,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:02:04,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:02:04,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:02:04,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:02:04,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:02:04,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:02:04,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:02:04,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:02:04,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:02:04,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:02:04,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:02:04,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:02:04,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:02:04,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:02:04,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:02:04,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:02:04,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:02:04,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:02:04,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:02:04,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:02:04,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:02:04,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 06:02:04,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:02:04,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:02:04,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:02:04,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:02:04,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:02:04,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:02:04,489 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:02:04,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:02:04,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:02:04,490 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:02:04,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:02:04,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:02:04,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:02:04,491 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:02:04,491 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:02:04,492 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:02:04,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:02:04,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:02:04,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:02:04,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:02:04,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:02:04,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:02:04,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:02:04,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:02:04,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:02:04,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:02:04,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 06:02:04,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 06:02:04,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:02:04,502 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07b05923cf5c1b39a35ab81b524575a0a488c268 [2021-08-27 06:02:04,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:02:04,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:02:04,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:02:04,884 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:02:04,885 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:02:04,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-08-27 06:02:04,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d4311ff9/42596840a70846ccb9bda5804a2afe9e/FLAGaf4c0a13b [2021-08-27 06:02:05,374 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:02:05,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-08-27 06:02:05,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d4311ff9/42596840a70846ccb9bda5804a2afe9e/FLAGaf4c0a13b [2021-08-27 06:02:05,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d4311ff9/42596840a70846ccb9bda5804a2afe9e [2021-08-27 06:02:05,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:02:05,793 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:02:05,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:02:05,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:02:05,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:02:05,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:02:05" (1/1) ... [2021-08-27 06:02:05,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49fbe09a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:05, skipping insertion in model container [2021-08-27 06:02:05,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:02:05" (1/1) ... [2021-08-27 06:02:05,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:02:05,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:02:05,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:02:05,945 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:02:05,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:02:05,969 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:02:05,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:05 WrapperNode [2021-08-27 06:02:05,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:02:05,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:02:05,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:02:05,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:02:06,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:05" (1/1) ... [2021-08-27 06:02:06,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:05" (1/1) ... [2021-08-27 06:02:06,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:05" (1/1) ... [2021-08-27 06:02:06,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:05" (1/1) ... [2021-08-27 06:02:06,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:05" (1/1) ... [2021-08-27 06:02:06,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:05" (1/1) ... [2021-08-27 06:02:06,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:05" (1/1) ... [2021-08-27 06:02:06,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:02:06,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:02:06,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:02:06,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:02:06,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:05" (1/1) ... [2021-08-27 06:02:06,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:02:06,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:06,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 06:02:06,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 06:02:06,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:02:06,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:02:06,107 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-27 06:02:06,107 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:02:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-27 06:02:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 06:02:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:02:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:02:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 06:02:06,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:02:06,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:02:06,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:02:06,405 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:02:06,405 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 06:02:06,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:02:06 BoogieIcfgContainer [2021-08-27 06:02:06,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:02:06,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:02:06,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:02:06,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:02:06,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:02:05" (1/3) ... [2021-08-27 06:02:06,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1521535a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:02:06, skipping insertion in model container [2021-08-27 06:02:06,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:02:05" (2/3) ... [2021-08-27 06:02:06,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1521535a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:02:06, skipping insertion in model container [2021-08-27 06:02:06,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:02:06" (3/3) ... [2021-08-27 06:02:06,414 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2021-08-27 06:02:06,418 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:02:06,427 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-08-27 06:02:06,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:02:06,493 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 06:02:06,493 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-27 06:02:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:02:06,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:06,517 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:06,517 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:06,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-08-27 06:02:06,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:06,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598976919] [2021-08-27 06:02:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:06,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:06,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:06,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:06,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598976919] [2021-08-27 06:02:06,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598976919] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:06,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:06,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:02:06,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014996023] [2021-08-27 06:02:06,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:02:06,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:06,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:02:06,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:02:06,812 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:07,015 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-08-27 06:02:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:02:07,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 06:02:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:07,027 INFO L225 Difference]: With dead ends: 58 [2021-08-27 06:02:07,027 INFO L226 Difference]: Without dead ends: 54 [2021-08-27 06:02:07,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:02:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-27 06:02:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-08-27 06:02:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 33 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-27 06:02:07,075 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-08-27 06:02:07,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:07,075 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-27 06:02:07,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-27 06:02:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 06:02:07,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:07,091 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:07,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 06:02:07,092 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:07,092 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-08-27 06:02:07,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:07,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105284626] [2021-08-27 06:02:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:07,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:07,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:07,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:07,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105284626] [2021-08-27 06:02:07,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105284626] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:07,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:07,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:02:07,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347773391] [2021-08-27 06:02:07,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:02:07,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:07,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:02:07,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:02:07,199 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:07,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:07,345 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-08-27 06:02:07,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:02:07,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 06:02:07,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:07,348 INFO L225 Difference]: With dead ends: 49 [2021-08-27 06:02:07,348 INFO L226 Difference]: Without dead ends: 49 [2021-08-27 06:02:07,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:02:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-27 06:02:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-08-27 06:02:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-27 06:02:07,359 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2021-08-27 06:02:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:07,359 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-27 06:02:07,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:07,360 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-27 06:02:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 06:02:07,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:07,360 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:07,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 06:02:07,361 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:07,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:07,362 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2021-08-27 06:02:07,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:07,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972560867] [2021-08-27 06:02:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:07,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:07,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:07,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:07,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972560867] [2021-08-27 06:02:07,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972560867] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:07,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:07,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:02:07,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216418210] [2021-08-27 06:02:07,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:02:07,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:07,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:02:07,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:02:07,464 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:07,653 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-08-27 06:02:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:02:07,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-27 06:02:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:07,654 INFO L225 Difference]: With dead ends: 40 [2021-08-27 06:02:07,655 INFO L226 Difference]: Without dead ends: 40 [2021-08-27 06:02:07,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:02:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-27 06:02:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-27 06:02:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-08-27 06:02:07,659 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2021-08-27 06:02:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:07,659 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-08-27 06:02:07,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-08-27 06:02:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 06:02:07,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:07,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:07,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 06:02:07,661 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:07,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:07,662 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2021-08-27 06:02:07,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:07,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041892356] [2021-08-27 06:02:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:07,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:07,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:07,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:07,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041892356] [2021-08-27 06:02:07,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041892356] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:07,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:07,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:02:07,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390737969] [2021-08-27 06:02:07,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:02:07,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:07,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:02:07,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:02:07,835 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:08,093 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-08-27 06:02:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:02:08,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-27 06:02:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:08,096 INFO L225 Difference]: With dead ends: 46 [2021-08-27 06:02:08,096 INFO L226 Difference]: Without dead ends: 46 [2021-08-27 06:02:08,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:02:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-27 06:02:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-08-27 06:02:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-27 06:02:08,108 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2021-08-27 06:02:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:08,109 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-27 06:02:08,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-27 06:02:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 06:02:08,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:08,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:08,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 06:02:08,112 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:08,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:08,113 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-08-27 06:02:08,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:08,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941563501] [2021-08-27 06:02:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:08,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:08,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:08,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:08,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:08,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941563501] [2021-08-27 06:02:08,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941563501] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:08,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:08,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:02:08,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859194658] [2021-08-27 06:02:08,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:02:08,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:02:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:02:08,242 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 06:02:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:08,360 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-08-27 06:02:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:02:08,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-08-27 06:02:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:08,362 INFO L225 Difference]: With dead ends: 46 [2021-08-27 06:02:08,362 INFO L226 Difference]: Without dead ends: 43 [2021-08-27 06:02:08,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:02:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-27 06:02:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-08-27 06:02:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-08-27 06:02:08,366 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2021-08-27 06:02:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:08,366 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-08-27 06:02:08,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 06:02:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-08-27 06:02:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 06:02:08,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:08,367 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:08,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 06:02:08,368 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:08,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:08,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2021-08-27 06:02:08,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:08,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541901064] [2021-08-27 06:02:08,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:08,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:08,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:08,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:08,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541901064] [2021-08-27 06:02:08,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541901064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:08,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680550447] [2021-08-27 06:02:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:08,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:08,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:08,425 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:08,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 06:02:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:08,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 06:02:08,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:08,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680550447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:08,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:08,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-08-27 06:02:08,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734994547] [2021-08-27 06:02:08,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:02:08,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:02:08,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:02:08,566 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:08,724 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-08-27 06:02:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:02:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 06:02:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:08,725 INFO L225 Difference]: With dead ends: 52 [2021-08-27 06:02:08,725 INFO L226 Difference]: Without dead ends: 52 [2021-08-27 06:02:08,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:02:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-27 06:02:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-08-27 06:02:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-08-27 06:02:08,729 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2021-08-27 06:02:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:08,729 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-08-27 06:02:08,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-08-27 06:02:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 06:02:08,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:08,730 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:08,783 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 06:02:08,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-27 06:02:08,948 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:08,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2021-08-27 06:02:08,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:08,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68074413] [2021-08-27 06:02:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:08,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:09,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 06:02:09,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:09,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68074413] [2021-08-27 06:02:09,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68074413] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:09,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:02:09,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 06:02:09,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668282425] [2021-08-27 06:02:09,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 06:02:09,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:09,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 06:02:09,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:02:09,095 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:09,264 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-08-27 06:02:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 06:02:09,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 17 [2021-08-27 06:02:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:09,267 INFO L225 Difference]: With dead ends: 44 [2021-08-27 06:02:09,267 INFO L226 Difference]: Without dead ends: 44 [2021-08-27 06:02:09,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:02:09,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-27 06:02:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-08-27 06:02:09,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.303030303030303) internal successors, (43), 38 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-08-27 06:02:09,282 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2021-08-27 06:02:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:09,282 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-08-27 06:02:09,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-08-27 06:02:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 06:02:09,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:09,284 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:09,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 06:02:09,284 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:09,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2021-08-27 06:02:09,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:09,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285881227] [2021-08-27 06:02:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:09,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:09,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:09,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:09,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:09,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285881227] [2021-08-27 06:02:09,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285881227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:09,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365970864] [2021-08-27 06:02:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:09,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:09,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:09,426 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:09,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 06:02:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:09,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 06:02:09,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:09,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365970864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:09,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:09,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-27 06:02:09,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280421547] [2021-08-27 06:02:09,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 06:02:09,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 06:02:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:02:09,638 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 06:02:09,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:09,822 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-08-27 06:02:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:02:09,824 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-08-27 06:02:09,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:09,826 INFO L225 Difference]: With dead ends: 50 [2021-08-27 06:02:09,826 INFO L226 Difference]: Without dead ends: 47 [2021-08-27 06:02:09,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:02:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-27 06:02:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-08-27 06:02:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-08-27 06:02:09,836 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 20 [2021-08-27 06:02:09,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:09,837 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-08-27 06:02:09,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 06:02:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-08-27 06:02:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:02:09,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:09,838 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:09,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:10,052 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,SelfDestructingSolverStorable7 [2021-08-27 06:02:10,053 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:10,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1483602424, now seen corresponding path program 2 times [2021-08-27 06:02:10,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:10,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846100764] [2021-08-27 06:02:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:10,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:10,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:10,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:10,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846100764] [2021-08-27 06:02:10,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846100764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:10,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352717833] [2021-08-27 06:02:10,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:10,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:10,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:10,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:10,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 06:02:10,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:02:10,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:10,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 06:02:10,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 06:02:10,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352717833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:10,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:10,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-27 06:02:10,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344728216] [2021-08-27 06:02:10,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 06:02:10,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:10,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 06:02:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:02:10,361 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:10,574 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-08-27 06:02:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 06:02:10,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-27 06:02:10,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:10,576 INFO L225 Difference]: With dead ends: 58 [2021-08-27 06:02:10,576 INFO L226 Difference]: Without dead ends: 58 [2021-08-27 06:02:10,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-27 06:02:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-27 06:02:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2021-08-27 06:02:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.25) internal successors, (40), 36 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-08-27 06:02:10,579 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 21 [2021-08-27 06:02:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:10,579 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-08-27 06:02:10,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:02:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-08-27 06:02:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 06:02:10,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:10,580 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:10,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:10,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:10,801 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:10,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:10,801 INFO L82 PathProgramCache]: Analyzing trace with hash -523456178, now seen corresponding path program 2 times [2021-08-27 06:02:10,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:10,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994129614] [2021-08-27 06:02:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:10,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:10,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:10,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:10,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:10,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994129614] [2021-08-27 06:02:10,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994129614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:10,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591438759] [2021-08-27 06:02:10,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:10,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:10,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:10,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:10,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 06:02:10,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 06:02:10,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:10,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 06:02:10,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:11,054 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:02:11,055 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-08-27 06:02:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 06:02:11,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591438759] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:11,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:02:11,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-08-27 06:02:11,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633882760] [2021-08-27 06:02:11,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:02:11,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:11,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:02:11,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:02:11,261 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:11,282 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-08-27 06:02:11,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:02:11,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-08-27 06:02:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:11,283 INFO L225 Difference]: With dead ends: 40 [2021-08-27 06:02:11,283 INFO L226 Difference]: Without dead ends: 40 [2021-08-27 06:02:11,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:02:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-27 06:02:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-27 06:02:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-08-27 06:02:11,286 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2021-08-27 06:02:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:11,287 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-08-27 06:02:11,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-08-27 06:02:11,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 06:02:11,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:11,288 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:11,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:11,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:11,497 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 06:02:11,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:11,498 INFO L82 PathProgramCache]: Analyzing trace with hash -523456177, now seen corresponding path program 1 times [2021-08-27 06:02:11,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:11,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163027005] [2021-08-27 06:02:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:11,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:11,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:11,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:11,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:11,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163027005] [2021-08-27 06:02:11,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163027005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:11,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147829110] [2021-08-27 06:02:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:11,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:11,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:11,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:11,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 06:02:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 06:02:11,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:11,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147829110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:11,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:11,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-27 06:02:11,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837699529] [2021-08-27 06:02:11,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 06:02:11,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 06:02:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:02:11,917 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 06:02:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:12,133 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-08-27 06:02:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:02:12,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-08-27 06:02:12,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:12,135 INFO L225 Difference]: With dead ends: 52 [2021-08-27 06:02:12,135 INFO L226 Difference]: Without dead ends: 49 [2021-08-27 06:02:12,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-27 06:02:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-27 06:02:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-08-27 06:02:12,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-08-27 06:02:12,140 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2021-08-27 06:02:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:12,140 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-08-27 06:02:12,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 06:02:12,141 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-08-27 06:02:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 06:02:12,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:12,143 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:12,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:12,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-27 06:02:12,365 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:12,365 INFO L82 PathProgramCache]: Analyzing trace with hash -661735506, now seen corresponding path program 2 times [2021-08-27 06:02:12,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:12,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966471518] [2021-08-27 06:02:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:12,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:12,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:12,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:12,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:12,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966471518] [2021-08-27 06:02:12,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966471518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:12,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12421295] [2021-08-27 06:02:12,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:12,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:12,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:12,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:12,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 06:02:12,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 06:02:12,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:12,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:02:12,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:12,662 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:02:12,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 06:02:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-27 06:02:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-27 06:02:13,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12421295] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:13,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:02:13,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-08-27 06:02:13,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349186980] [2021-08-27 06:02:13,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:02:13,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:13,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:02:13,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:02:13,017 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:13,051 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-08-27 06:02:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:02:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-08-27 06:02:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:13,054 INFO L225 Difference]: With dead ends: 50 [2021-08-27 06:02:13,055 INFO L226 Difference]: Without dead ends: 50 [2021-08-27 06:02:13,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:02:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-27 06:02:13,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-08-27 06:02:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-08-27 06:02:13,061 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 30 [2021-08-27 06:02:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:13,061 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-08-27 06:02:13,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-08-27 06:02:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-27 06:02:13,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:13,068 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:13,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:13,292 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 06:02:13,292 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:13,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:13,293 INFO L82 PathProgramCache]: Analyzing trace with hash 494772831, now seen corresponding path program 1 times [2021-08-27 06:02:13,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:13,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723675759] [2021-08-27 06:02:13,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:13,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:13,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:13,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-27 06:02:13,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:13,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723675759] [2021-08-27 06:02:13,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723675759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:13,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338547248] [2021-08-27 06:02:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:13,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:13,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:13,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:13,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 06:02:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:13,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:02:13,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:02:13,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338547248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:13,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:13,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2021-08-27 06:02:13,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286981172] [2021-08-27 06:02:13,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 06:02:13,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 06:02:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:02:13,697 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 06:02:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:13,898 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-08-27 06:02:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:02:13,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-08-27 06:02:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:13,900 INFO L225 Difference]: With dead ends: 84 [2021-08-27 06:02:13,900 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 06:02:13,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-27 06:02:13,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 06:02:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2021-08-27 06:02:13,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 53 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-08-27 06:02:13,904 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 36 [2021-08-27 06:02:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:13,905 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-08-27 06:02:13,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 06:02:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-08-27 06:02:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-27 06:02:13,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:13,905 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:13,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:14,121 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 06:02:14,121 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:14,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1980281553, now seen corresponding path program 1 times [2021-08-27 06:02:14,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:14,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134410859] [2021-08-27 06:02:14,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:14,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:14,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:14,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:14,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-08-27 06:02:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-27 06:02:14,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:14,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134410859] [2021-08-27 06:02:14,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134410859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:14,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113323238] [2021-08-27 06:02:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:14,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:14,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:14,313 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:14,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 06:02:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:14,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:02:14,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-27 06:02:14,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113323238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:14,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:14,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-27 06:02:14,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997539308] [2021-08-27 06:02:14,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 06:02:14,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 06:02:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-27 06:02:14,814 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:15,112 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-08-27 06:02:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 06:02:15,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2021-08-27 06:02:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:15,114 INFO L225 Difference]: With dead ends: 72 [2021-08-27 06:02:15,114 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 06:02:15,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-08-27 06:02:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 06:02:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2021-08-27 06:02:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 58 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-08-27 06:02:15,117 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 66 [2021-08-27 06:02:15,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:15,117 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-08-27 06:02:15,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:15,118 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-08-27 06:02:15,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-27 06:02:15,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:15,119 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:15,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:15,332 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 06:02:15,333 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 06:02:15,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:15,333 INFO L82 PathProgramCache]: Analyzing trace with hash -453177461, now seen corresponding path program 2 times [2021-08-27 06:02:15,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:15,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954418986] [2021-08-27 06:02:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:15,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:15,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:15,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:15,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-08-27 06:02:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-08-27 06:02:15,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:15,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954418986] [2021-08-27 06:02:15,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954418986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:15,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463976440] [2021-08-27 06:02:15,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:15,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:15,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:15,589 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:15,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 06:02:15,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:02:15,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:15,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 06:02:15,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 142 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-27 06:02:16,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463976440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:16,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:16,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-27 06:02:16,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609090034] [2021-08-27 06:02:16,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-27 06:02:16,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:16,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-27 06:02:16,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-27 06:02:16,213 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:16,582 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-08-27 06:02:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:02:16,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 76 [2021-08-27 06:02:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:16,583 INFO L225 Difference]: With dead ends: 77 [2021-08-27 06:02:16,583 INFO L226 Difference]: Without dead ends: 74 [2021-08-27 06:02:16,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-08-27 06:02:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-27 06:02:16,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2021-08-27 06:02:16,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 63 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:02:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-08-27 06:02:16,586 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 76 [2021-08-27 06:02:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:16,586 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-08-27 06:02:16,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-08-27 06:02:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-27 06:02:16,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:16,587 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:16,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:16,800 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 06:02:16,801 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash -197968815, now seen corresponding path program 3 times [2021-08-27 06:02:16,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:16,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168467837] [2021-08-27 06:02:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:16,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:16,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:16,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:17,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-08-27 06:02:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 277 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-08-27 06:02:17,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:17,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168467837] [2021-08-27 06:02:17,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168467837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:17,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394497134] [2021-08-27 06:02:17,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 06:02:17,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:17,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:17,040 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:17,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 06:02:17,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-27 06:02:17,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:17,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 06:02:17,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:17,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-27 06:02:17,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-08-27 06:02:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-08-27 06:02:18,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394497134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:18,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:18,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 16 [2021-08-27 06:02:18,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782538529] [2021-08-27 06:02:18,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 06:02:18,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 06:02:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:02:18,157 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 16 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 06:02:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:18,615 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2021-08-27 06:02:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 06:02:18,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 86 [2021-08-27 06:02:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:18,617 INFO L225 Difference]: With dead ends: 87 [2021-08-27 06:02:18,617 INFO L226 Difference]: Without dead ends: 84 [2021-08-27 06:02:18,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 452.9ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-08-27 06:02:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-27 06:02:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-08-27 06:02:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 70 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-08-27 06:02:18,621 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 86 [2021-08-27 06:02:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:18,621 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-08-27 06:02:18,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 06:02:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-08-27 06:02:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-27 06:02:18,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:18,622 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:18,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:18,836 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 06:02:18,837 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:18,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:18,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1122221700, now seen corresponding path program 2 times [2021-08-27 06:02:18,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:18,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899546189] [2021-08-27 06:02:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:18,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-08-27 06:02:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2021-08-27 06:02:18,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:18,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899546189] [2021-08-27 06:02:18,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899546189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:18,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405664999] [2021-08-27 06:02:18,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:18,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:18,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:18,965 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:18,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 06:02:19,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 06:02:19,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:19,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:02:19,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:19,338 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:02:19,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 06:02:19,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-27 06:02:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-08-27 06:02:20,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405664999] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:20,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:02:20,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-08-27 06:02:20,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680103685] [2021-08-27 06:02:20,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:02:20,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:02:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:02:20,173 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:20,212 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-08-27 06:02:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:02:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 102 [2021-08-27 06:02:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:20,213 INFO L225 Difference]: With dead ends: 79 [2021-08-27 06:02:20,213 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 06:02:20,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:02:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 06:02:20,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-08-27 06:02:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 70 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-08-27 06:02:20,216 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 102 [2021-08-27 06:02:20,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:20,216 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-08-27 06:02:20,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:20,216 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-08-27 06:02:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-27 06:02:20,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:20,217 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:20,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:20,441 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 06:02:20,441 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 06:02:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash -81231572, now seen corresponding path program 1 times [2021-08-27 06:02:20,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:20,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633364396] [2021-08-27 06:02:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:20,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:20,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:20,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:20,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-08-27 06:02:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 3 proven. 375 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-08-27 06:02:20,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:20,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633364396] [2021-08-27 06:02:20,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633364396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:20,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565934725] [2021-08-27 06:02:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:20,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:20,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:20,709 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 06:02:20,737 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 06:02:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:21,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 06:02:21,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 267 proven. 112 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-08-27 06:02:21,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565934725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:21,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:21,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-27 06:02:21,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484265618] [2021-08-27 06:02:21,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 06:02:21,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:21,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 06:02:21,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-08-27 06:02:21,667 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 20 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:22,120 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2021-08-27 06:02:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 06:02:22,121 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 20 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 105 [2021-08-27 06:02:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:22,122 INFO L225 Difference]: With dead ends: 90 [2021-08-27 06:02:22,122 INFO L226 Difference]: Without dead ends: 87 [2021-08-27 06:02:22,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-08-27 06:02:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-27 06:02:22,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2021-08-27 06:02:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.095890410958904) internal successors, (80), 75 states have internal predecessors, (80), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-08-27 06:02:22,125 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 105 [2021-08-27 06:02:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:22,125 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-08-27 06:02:22,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 20 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-08-27 06:02:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-27 06:02:22,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:22,127 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:22,154 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 06:02:22,341 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 06:02:22,341 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 06:02:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1970017626, now seen corresponding path program 2 times [2021-08-27 06:02:22,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:22,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157596310] [2021-08-27 06:02:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:22,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:22,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:22,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:22,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-08-27 06:02:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-08-27 06:02:22,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:22,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157596310] [2021-08-27 06:02:22,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157596310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:22,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655154173] [2021-08-27 06:02:22,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:22,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:22,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:22,633 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 06:02:22,634 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 06:02:23,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 06:02:23,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:23,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:02:23,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:23,151 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-27 06:02:23,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-27 06:02:24,136 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-27 06:02:24,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-27 06:02:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2021-08-27 06:02:25,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655154173] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:25,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:02:25,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2021-08-27 06:02:25,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092856332] [2021-08-27 06:02:25,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:02:25,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:02:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-27 06:02:25,135 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:25,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:25,205 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-08-27 06:02:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:02:25,206 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 115 [2021-08-27 06:02:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:25,206 INFO L225 Difference]: With dead ends: 82 [2021-08-27 06:02:25,206 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 06:02:25,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-27 06:02:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 06:02:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-08-27 06:02:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 68 states have internal predecessors, (71), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-08-27 06:02:25,209 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 115 [2021-08-27 06:02:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:25,209 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-08-27 06:02:25,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:02:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-08-27 06:02:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-08-27 06:02:25,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:25,210 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:25,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:25,416 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 06:02:25,417 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 06:02:25,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash -940912475, now seen corresponding path program 1 times [2021-08-27 06:02:25,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:25,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072847661] [2021-08-27 06:02:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:25,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:25,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:25,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:25,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-08-27 06:02:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-08-27 06:02:25,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:25,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072847661] [2021-08-27 06:02:25,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072847661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:25,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991323433] [2021-08-27 06:02:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:25,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:25,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:25,692 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 06:02:25,694 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 06:02:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:26,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-27 06:02:26,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 344 proven. 148 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-08-27 06:02:26,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991323433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:26,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:26,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-27 06:02:26,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176863630] [2021-08-27 06:02:26,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-27 06:02:26,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:26,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-27 06:02:26,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-27 06:02:26,887 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:27,368 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-08-27 06:02:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 06:02:27,368 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 116 [2021-08-27 06:02:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:27,369 INFO L225 Difference]: With dead ends: 88 [2021-08-27 06:02:27,369 INFO L226 Difference]: Without dead ends: 85 [2021-08-27 06:02:27,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 600.6ms TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 06:02:27,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-27 06:02:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-08-27 06:02:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-08-27 06:02:27,372 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 116 [2021-08-27 06:02:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:27,373 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-08-27 06:02:27,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-08-27 06:02:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-08-27 06:02:27,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:27,374 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:27,398 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 06:02:27,596 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 06:02:27,597 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 06:02:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:27,597 INFO L82 PathProgramCache]: Analyzing trace with hash -431416353, now seen corresponding path program 2 times [2021-08-27 06:02:27,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:27,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228925679] [2021-08-27 06:02:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:27,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:27,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:27,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-08-27 06:02:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 3 proven. 616 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-08-27 06:02:27,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:27,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228925679] [2021-08-27 06:02:27,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228925679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:27,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755544549] [2021-08-27 06:02:27,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:27,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:27,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:27,893 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 06:02:27,895 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 06:02:28,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:02:28,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:28,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 06:02:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 431 proven. 189 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-08-27 06:02:29,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755544549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:29,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:29,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-27 06:02:29,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843877544] [2021-08-27 06:02:29,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 06:02:29,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:29,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 06:02:29,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-08-27 06:02:29,264 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:29,747 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-08-27 06:02:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 06:02:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2021-08-27 06:02:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:29,749 INFO L225 Difference]: With dead ends: 93 [2021-08-27 06:02:29,749 INFO L226 Difference]: Without dead ends: 90 [2021-08-27 06:02:29,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 06:02:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-27 06:02:29,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-08-27 06:02:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:29,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-08-27 06:02:29,752 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 126 [2021-08-27 06:02:29,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:29,752 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-08-27 06:02:29,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-08-27 06:02:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-08-27 06:02:29,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:29,754 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:29,778 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 06:02:29,978 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 06:02:29,979 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 06:02:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:29,979 INFO L82 PathProgramCache]: Analyzing trace with hash -138765787, now seen corresponding path program 3 times [2021-08-27 06:02:29,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:29,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676592976] [2021-08-27 06:02:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:29,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:30,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:30,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:30,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-08-27 06:02:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 3 proven. 759 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-08-27 06:02:30,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:30,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676592976] [2021-08-27 06:02:30,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676592976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:30,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369877603] [2021-08-27 06:02:30,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 06:02:30,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:30,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:30,329 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 06:02:30,355 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 06:02:31,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-27 06:02:31,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:31,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 06:02:31,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2021-08-27 06:02:31,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369877603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:31,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:31,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2021-08-27 06:02:31,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655731831] [2021-08-27 06:02:31,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 06:02:31,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 06:02:31,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-08-27 06:02:31,503 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 06:02:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:31,966 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-08-27 06:02:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 06:02:31,967 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 136 [2021-08-27 06:02:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:31,967 INFO L225 Difference]: With dead ends: 109 [2021-08-27 06:02:31,967 INFO L226 Difference]: Without dead ends: 106 [2021-08-27 06:02:31,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 532.0ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 06:02:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-27 06:02:31,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2021-08-27 06:02:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-08-27 06:02:31,971 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 136 [2021-08-27 06:02:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:31,971 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-08-27 06:02:31,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 06:02:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-08-27 06:02:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-08-27 06:02:31,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:31,973 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:31,999 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 06:02:32,196 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 06:02:32,197 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash 16497858, now seen corresponding path program 4 times [2021-08-27 06:02:32,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:32,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675941283] [2021-08-27 06:02:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:32,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:32,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:32,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:32,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 06:02:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 3 proven. 917 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-08-27 06:02:32,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:32,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675941283] [2021-08-27 06:02:32,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675941283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:32,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606586715] [2021-08-27 06:02:32,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 06:02:32,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:32,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:32,585 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:32,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 06:02:33,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 06:02:33,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:33,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-27 06:02:33,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 635 proven. 286 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-08-27 06:02:34,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606586715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:34,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:34,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-27 06:02:34,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770591865] [2021-08-27 06:02:34,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 06:02:34,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 06:02:34,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-08-27 06:02:34,206 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 29 states, 29 states have (on average 5.275862068965517) internal successors, (153), 28 states have internal predecessors, (153), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:34,766 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-08-27 06:02:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 06:02:34,766 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.275862068965517) internal successors, (153), 28 states have internal predecessors, (153), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 150 [2021-08-27 06:02:34,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:34,767 INFO L225 Difference]: With dead ends: 107 [2021-08-27 06:02:34,767 INFO L226 Difference]: Without dead ends: 104 [2021-08-27 06:02:34,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 846.5ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 06:02:34,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-27 06:02:34,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-08-27 06:02:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 states have internal predecessors, (95), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-08-27 06:02:34,771 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 150 [2021-08-27 06:02:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:34,771 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-08-27 06:02:34,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.275862068965517) internal successors, (153), 28 states have internal predecessors, (153), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-08-27 06:02:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-08-27 06:02:34,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:34,773 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:34,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:34,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:34,993 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash -846233464, now seen corresponding path program 5 times [2021-08-27 06:02:34,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:34,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856786754] [2021-08-27 06:02:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:34,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:35,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:35,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:35,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-08-27 06:02:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 3 proven. 1090 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-08-27 06:02:35,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:35,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856786754] [2021-08-27 06:02:35,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856786754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:35,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033622707] [2021-08-27 06:02:35,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 06:02:35,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:35,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:35,397 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:35,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 06:02:36,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-27 06:02:36,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:36,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 06:02:36,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 752 proven. 342 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2021-08-27 06:02:37,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033622707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:37,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:37,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-08-27 06:02:37,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055694150] [2021-08-27 06:02:37,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 06:02:37,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:37,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 06:02:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-08-27 06:02:37,112 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 30 states have internal predecessors, (163), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:37,772 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-08-27 06:02:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 06:02:37,772 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 30 states have internal predecessors, (163), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 160 [2021-08-27 06:02:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:37,773 INFO L225 Difference]: With dead ends: 112 [2021-08-27 06:02:37,773 INFO L226 Difference]: Without dead ends: 109 [2021-08-27 06:02:37,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 937.1ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-08-27 06:02:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-27 06:02:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-08-27 06:02:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:02:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-08-27 06:02:37,779 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 160 [2021-08-27 06:02:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:37,779 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-08-27 06:02:37,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 30 states have internal predecessors, (163), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 06:02:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-08-27 06:02:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-08-27 06:02:37,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:37,781 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:37,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:37,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:37,989 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash 609725890, now seen corresponding path program 6 times [2021-08-27 06:02:37,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:37,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954604653] [2021-08-27 06:02:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:37,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:38,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:38,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:38,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-08-27 06:02:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 3 proven. 1278 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2021-08-27 06:02:38,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:38,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954604653] [2021-08-27 06:02:38,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954604653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:38,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294687315] [2021-08-27 06:02:38,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 06:02:38,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:38,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:38,418 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:38,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 06:02:39,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-27 06:02:39,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:39,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:02:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:39,315 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:02:39,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 06:02:39,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-27 06:02:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1692 trivial. 0 not checked. [2021-08-27 06:02:40,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294687315] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:02:40,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:02:40,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 23 [2021-08-27 06:02:40,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246337050] [2021-08-27 06:02:40,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:02:40,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:40,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:02:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-08-27 06:02:40,809 INFO L87 Difference]: Start difference. First operand 105 states and 109 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 06:02:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:40,859 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-08-27 06:02:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:02:40,860 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 170 [2021-08-27 06:02:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:40,861 INFO L225 Difference]: With dead ends: 103 [2021-08-27 06:02:40,861 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 06:02:40,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-08-27 06:02:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 06:02:40,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 06:02:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 06:02:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 06:02:40,862 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2021-08-27 06:02:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:40,862 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 06:02:40,862 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 06:02:40,862 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 06:02:40,862 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 06:02:40,865 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr0ASSERT_VIOLATIONARRAY_INDEX [2021-08-27 06:02:40,865 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr1REQUIRES_VIOLATION [2021-08-27 06:02:40,865 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr2REQUIRES_VIOLATION [2021-08-27 06:02:40,865 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 06:02:40,866 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 06:02:40,866 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 06:02:40,866 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 06:02:40,866 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 06:02:40,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:41,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:41,096 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 06:02:41,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 06:02:41 BoogieIcfgContainer [2021-08-27 06:02:41,097 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 06:02:41,097 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 06:02:41,097 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 06:02:41,098 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 06:02:41,098 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:02:06" (3/4) ... [2021-08-27 06:02:41,100 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 06:02:41,105 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 06:02:41,105 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-08-27 06:02:41,105 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 06:02:41,108 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-08-27 06:02:41,108 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-27 06:02:41,108 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-08-27 06:02:41,108 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 06:02:41,132 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 06:02:41,132 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 06:02:41,133 INFO L168 Benchmark]: Toolchain (without parser) took 35340.24 ms. Allocated memory was 50.3 MB in the beginning and 570.4 MB in the end (delta: 520.1 MB). Free memory was 27.3 MB in the beginning and 351.5 MB in the end (delta: -324.2 MB). Peak memory consumption was 194.5 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:41,134 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 50.3 MB. Free memory was 32.2 MB in the beginning and 32.2 MB in the end (delta: 37.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:02:41,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.60 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 29.6 MB in the end (delta: -2.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:41,134 INFO L168 Benchmark]: Boogie Preprocessor took 62.24 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 29.6 MB in the beginning and 44.1 MB in the end (delta: -14.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:41,135 INFO L168 Benchmark]: RCFGBuilder took 374.16 ms. Allocated memory is still 60.8 MB. Free memory was 44.1 MB in the beginning and 43.5 MB in the end (delta: 592.8 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:41,135 INFO L168 Benchmark]: TraceAbstraction took 34688.43 ms. Allocated memory was 60.8 MB in the beginning and 570.4 MB in the end (delta: 509.6 MB). Free memory was 43.0 MB in the beginning and 354.1 MB in the end (delta: -311.0 MB). Peak memory consumption was 198.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:41,135 INFO L168 Benchmark]: Witness Printer took 35.01 ms. Allocated memory is still 570.4 MB. Free memory was 354.1 MB in the beginning and 351.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:41,137 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 50.3 MB. Free memory was 32.2 MB in the beginning and 32.2 MB in the end (delta: 37.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 173.60 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 29.6 MB in the end (delta: -2.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.24 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 29.6 MB in the beginning and 44.1 MB in the end (delta: -14.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 374.16 ms. Allocated memory is still 60.8 MB. Free memory was 44.1 MB in the beginning and 43.5 MB in the end (delta: 592.8 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 34688.43 ms. Allocated memory was 60.8 MB in the beginning and 570.4 MB in the end (delta: 509.6 MB). Free memory was 43.0 MB in the beginning and 354.1 MB in the end (delta: -311.0 MB). Peak memory consumption was 198.2 MB. Max. memory is 16.1 GB. * Witness Printer took 35.01 ms. Allocated memory is still 570.4 MB. Free memory was 354.1 MB in the beginning and 351.5 MB in the end (delta: 2.6 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: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: 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: 34612.7ms, OverallIterations: 25, TraceHistogramMax: 26, EmptinessCheckTime: 47.1ms, AutomataDifference: 6595.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 617 SDtfs, 1899 SDslu, 2091 SDs, 0 SdLazy, 2846 SolverSat, 306 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2173.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1990 GetRequests, 1547 SyntacticMatches, 16 SemanticMatches, 427 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 7447.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=24, InterpolantAutomatonStates: 227, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 133.1ms AutomataMinimizationTime, 25 MinimizatonAttempts, 132 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 245.5ms SsaConstructionTime, 733.2ms SatisfiabilityAnalysisTime, 16063.6ms InterpolantComputationTime, 3239 NumberOfCodeBlocks, 2689 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3195 ConstructedInterpolants, 462 QuantifiedInterpolants, 20385 SizeOfPredicates, 30 NumberOfNonLiveVariables, 3223 ConjunctsInSsa, 172 ConjunctsInUnsatCore, 44 InterpolantComputations, 11 PerfectInterpolantSequences, 10778/18637 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 06:02:41,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...