./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/getNumbers2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf 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/memsafety-ext3/getNumbers2.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 e872a0dffbf376eb2d8b1e3516401a8dafe115a6 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 19:12:29,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 19:12:29,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 19:12:29,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 19:12:29,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 19:12:29,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 19:12:29,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 19:12:29,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 19:12:29,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 19:12:29,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 19:12:29,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 19:12:29,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 19:12:29,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 19:12:29,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 19:12:29,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 19:12:29,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 19:12:29,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 19:12:29,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 19:12:29,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 19:12:29,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 19:12:29,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 19:12:29,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 19:12:29,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 19:12:29,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 19:12:29,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 19:12:29,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 19:12:29,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 19:12:29,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 19:12:29,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 19:12:29,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 19:12:29,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 19:12:29,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 19:12:29,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 19:12:29,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 19:12:29,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 19:12:29,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 19:12:29,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 19:12:29,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 19:12:29,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 19:12:29,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 19:12:29,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 19:12:29,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 19:12:29,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 19:12:29,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 19:12:29,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 19:12:29,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 19:12:29,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 19:12:29,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 19:12:29,971 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 19:12:29,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 19:12:29,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 19:12:29,971 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 19:12:29,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 19:12:29,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 19:12:29,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 19:12:29,972 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 19:12:29,973 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 19:12:29,973 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 19:12:29,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 19:12:29,973 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 19:12:29,973 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 19:12:29,973 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 19:12:29,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 19:12:29,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 19:12:29,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 19:12:29,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 19:12:29,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 19:12:29,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 19:12:29,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 19:12:29,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 19:12:29,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 19:12:29,975 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e872a0dffbf376eb2d8b1e3516401a8dafe115a6 [2021-08-30 19:12:30,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 19:12:30,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 19:12:30,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 19:12:30,332 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 19:12:30,333 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 19:12:30,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-08-30 19:12:30,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9445399ad/9ffd2d1b0177484a9f0cf04c9db041bc/FLAG0ba05f18b [2021-08-30 19:12:30,763 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 19:12:30,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-08-30 19:12:30,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9445399ad/9ffd2d1b0177484a9f0cf04c9db041bc/FLAG0ba05f18b [2021-08-30 19:12:31,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9445399ad/9ffd2d1b0177484a9f0cf04c9db041bc [2021-08-30 19:12:31,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 19:12:31,196 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 19:12:31,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 19:12:31,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 19:12:31,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 19:12:31,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:12:31" (1/1) ... [2021-08-30 19:12:31,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@525a1c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:12:31, skipping insertion in model container [2021-08-30 19:12:31,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:12:31" (1/1) ... [2021-08-30 19:12:31,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 19:12:31,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 19:12:31,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 19:12:31,362 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 19:12:31,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 19:12:31,386 INFO L208 MainTranslator]: Completed translation [2021-08-30 19:12:31,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:12:31 WrapperNode [2021-08-30 19:12:31,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 19:12:31,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 19:12:31,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 19:12:31,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 19:12:31,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:12:31" (1/1) ... [2021-08-30 19:12:31,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:12:31" (1/1) ... [2021-08-30 19:12:31,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:12:31" (1/1) ... [2021-08-30 19:12:31,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:12:31" (1/1) ... [2021-08-30 19:12:31,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:12:31" (1/1) ... [2021-08-30 19:12:31,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:12:31" (1/1) ... [2021-08-30 19:12:31,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:12:31" (1/1) ... [2021-08-30 19:12:31,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 19:12:31,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 19:12:31,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 19:12:31,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 19:12:31,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:12:31" (1/1) ... [2021-08-30 19:12:31,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 19:12:31,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 19:12:31,492 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) [2021-08-30 19:12:31,494 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 [2021-08-30 19:12:31,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 19:12:31,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 19:12:31,518 INFO L138 BoogieDeclarations]: Found implementation of procedure getNumbers [2021-08-30 19:12:31,518 INFO L138 BoogieDeclarations]: Found implementation of procedure getNumbers2 [2021-08-30 19:12:31,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 19:12:31,518 INFO L130 BoogieDeclarations]: Found specification of procedure getNumbers [2021-08-30 19:12:31,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 19:12:31,519 INFO L130 BoogieDeclarations]: Found specification of procedure getNumbers2 [2021-08-30 19:12:31,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 19:12:31,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 19:12:31,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 19:12:31,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 19:12:31,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 19:12:31,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 19:12:31,718 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 19:12:31,718 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-30 19:12:31,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:12:31 BoogieIcfgContainer [2021-08-30 19:12:31,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 19:12:31,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 19:12:31,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 19:12:31,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 19:12:31,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:12:31" (1/3) ... [2021-08-30 19:12:31,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c55c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:12:31, skipping insertion in model container [2021-08-30 19:12:31,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:12:31" (2/3) ... [2021-08-30 19:12:31,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c55c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:12:31, skipping insertion in model container [2021-08-30 19:12:31,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:12:31" (3/3) ... [2021-08-30 19:12:31,740 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2021-08-30 19:12:31,744 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 19:12:31,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-08-30 19:12:31,805 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 19:12:31,816 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 [2021-08-30 19:12:31,816 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-08-30 19:12:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.619047619047619) internal successors, (34), 30 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 19:12:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 19:12:31,840 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:31,840 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:31,841 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting getNumbersErr1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:31,848 INFO L82 PathProgramCache]: Analyzing trace with hash -262167437, now seen corresponding path program 1 times [2021-08-30 19:12:31,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:31,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955693272] [2021-08-30 19:12:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:31,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:32,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 19:12:32,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:32,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955693272] [2021-08-30 19:12:32,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955693272] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 19:12:32,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 19:12:32,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 19:12:32,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710613983] [2021-08-30 19:12:32,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 19:12:32,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:32,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 19:12:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 19:12:32,285 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.619047619047619) internal successors, (34), 30 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 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) [2021-08-30 19:12:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:32,493 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-08-30 19:12:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 19:12:32,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 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 10 [2021-08-30 19:12:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:32,503 INFO L225 Difference]: With dead ends: 43 [2021-08-30 19:12:32,503 INFO L226 Difference]: Without dead ends: 40 [2021-08-30 19:12:32,505 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 84.73ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-30 19:12:32,515 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.05ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.71ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:32,517 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 7 Invalid, 115 Unknown, 0 Unchecked, 3.05ms Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 141.71ms Time] [2021-08-30 19:12:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-30 19:12:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-08-30 19:12:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.5) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-08-30 19:12:32,547 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 10 [2021-08-30 19:12:32,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:32,547 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-08-30 19:12:32,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 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) [2021-08-30 19:12:32,548 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-08-30 19:12:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 19:12:32,549 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:32,549 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:32,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 19:12:32,549 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting getNumbersErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:32,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:32,553 INFO L82 PathProgramCache]: Analyzing trace with hash -262167438, now seen corresponding path program 1 times [2021-08-30 19:12:32,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:32,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411354623] [2021-08-30 19:12:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:32,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:32,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 19:12:32,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:32,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411354623] [2021-08-30 19:12:32,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411354623] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 19:12:32,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 19:12:32,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-30 19:12:32,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489759183] [2021-08-30 19:12:32,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 19:12:32,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:32,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 19:12:32,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 19:12:32,686 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 4 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 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) [2021-08-30 19:12:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:32,800 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-08-30 19:12:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 19:12:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 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 10 [2021-08-30 19:12:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:32,804 INFO L225 Difference]: With dead ends: 37 [2021-08-30 19:12:32,805 INFO L226 Difference]: Without dead ends: 37 [2021-08-30 19:12:32,808 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.23ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 19:12:32,810 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.60ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.69ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:32,811 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 7 Invalid, 75 Unknown, 0 Unchecked, 2.60ms Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 76.69ms Time] [2021-08-30 19:12:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-30 19:12:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-30 19:12:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 29 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-08-30 19:12:32,823 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 10 [2021-08-30 19:12:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:32,823 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-08-30 19:12:32,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 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) [2021-08-30 19:12:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-08-30 19:12:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 19:12:32,825 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:32,825 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:32,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 19:12:32,826 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting getNumbersErr1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:32,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:32,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1979581628, now seen corresponding path program 1 times [2021-08-30 19:12:32,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:32,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373834454] [2021-08-30 19:12:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:32,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:32,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 19:12:32,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:32,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373834454] [2021-08-30 19:12:32,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373834454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:32,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774711517] [2021-08-30 19:12:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:32,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:32,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 19:12:32,989 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) [2021-08-30 19:12:33,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 19:12:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-30 19:12:33,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 19:12:33,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 19:12:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 19:12:33,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 19:12:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 19:12:33,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774711517] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 19:12:33,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 19:12:33,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-08-30 19:12:33,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621975801] [2021-08-30 19:12:33,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 19:12:33,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 19:12:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-30 19:12:33,443 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 19:12:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:33,663 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-08-30 19:12:33,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 19:12:33,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2021-08-30 19:12:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:33,666 INFO L225 Difference]: With dead ends: 46 [2021-08-30 19:12:33,666 INFO L226 Difference]: Without dead ends: 46 [2021-08-30 19:12:33,667 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 138.11ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-30 19:12:33,670 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 69 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.75ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.17ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:33,672 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 10 Invalid, 229 Unknown, 0 Unchecked, 7.75ms Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 125.17ms Time] [2021-08-30 19:12:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-30 19:12:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-08-30 19:12:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 38 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-08-30 19:12:33,681 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 13 [2021-08-30 19:12:33,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:33,682 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-08-30 19:12:33,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 19:12:33,682 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-08-30 19:12:33,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 19:12:33,683 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:33,683 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:33,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 19:12:33,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:33,893 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting getNumbersErr1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:33,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:33,894 INFO L82 PathProgramCache]: Analyzing trace with hash 892002611, now seen corresponding path program 2 times [2021-08-30 19:12:33,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:33,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190253815] [2021-08-30 19:12:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:33,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:34,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 19:12:34,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:34,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190253815] [2021-08-30 19:12:34,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190253815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:34,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128733647] [2021-08-30 19:12:34,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 19:12:34,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:34,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 19:12:34,134 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) [2021-08-30 19:12:34,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 19:12:34,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 19:12:34,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 19:12:34,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 19:12:34,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 19:12:34,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 19:12:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 19:12:34,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 19:12:34,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128733647] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 19:12:34,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 19:12:34,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2021-08-30 19:12:34,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450304661] [2021-08-30 19:12:34,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 19:12:34,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:34,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 19:12:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-30 19:12:34,445 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 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) [2021-08-30 19:12:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:34,535 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-08-30 19:12:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 19:12:34,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 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 22 [2021-08-30 19:12:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:34,537 INFO L225 Difference]: With dead ends: 46 [2021-08-30 19:12:34,537 INFO L226 Difference]: Without dead ends: 46 [2021-08-30 19:12:34,538 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 151.37ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-30 19:12:34,539 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.26ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.91ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:34,540 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 10 Invalid, 150 Unknown, 0 Unchecked, 4.26ms Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 72.91ms Time] [2021-08-30 19:12:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-30 19:12:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-08-30 19:12:34,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 36 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-08-30 19:12:34,549 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 22 [2021-08-30 19:12:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:34,549 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-08-30 19:12:34,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 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) [2021-08-30 19:12:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-08-30 19:12:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 19:12:34,551 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:34,551 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:34,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 19:12:34,764 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,SelfDestructingSolverStorable3 [2021-08-30 19:12:34,764 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting getNumbers2Err0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1645381224, now seen corresponding path program 1 times [2021-08-30 19:12:34,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:34,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865737795] [2021-08-30 19:12:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:34,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:34,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:34,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 19:12:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 19:12:34,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:34,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865737795] [2021-08-30 19:12:34,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865737795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:34,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170291680] [2021-08-30 19:12:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:34,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 19:12:34,887 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) [2021-08-30 19:12:34,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 19:12:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:34,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 19:12:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 19:12:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 19:12:35,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 19:12:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 19:12:35,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170291680] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 19:12:35,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 19:12:35,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2021-08-30 19:12:35,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133608664] [2021-08-30 19:12:35,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-30 19:12:35,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:35,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-30 19:12:35,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-30 19:12:35,131 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 19:12:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:35,258 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-08-30 19:12:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 19:12:35,258 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-08-30 19:12:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:35,259 INFO L225 Difference]: With dead ends: 62 [2021-08-30 19:12:35,260 INFO L226 Difference]: Without dead ends: 62 [2021-08-30 19:12:35,260 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 79.60ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-08-30 19:12:35,261 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.92ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:35,261 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 36 Invalid, 197 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 103.92ms Time] [2021-08-30 19:12:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-30 19:12:35,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-30 19:12:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 54 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-08-30 19:12:35,266 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 27 [2021-08-30 19:12:35,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:35,266 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-08-30 19:12:35,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 19:12:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-08-30 19:12:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-30 19:12:35,267 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:35,268 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:35,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 19:12:35,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:35,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting getNumbers2Err0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2093434040, now seen corresponding path program 2 times [2021-08-30 19:12:35,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:35,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481628088] [2021-08-30 19:12:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:35,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:35,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:35,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 19:12:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-30 19:12:35,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:35,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481628088] [2021-08-30 19:12:35,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481628088] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 19:12:35,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 19:12:35,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 19:12:35,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298101742] [2021-08-30 19:12:35,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 19:12:35,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 19:12:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-30 19:12:35,626 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 19:12:35,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:35,738 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-08-30 19:12:35,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 19:12:35,738 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-08-30 19:12:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:35,741 INFO L225 Difference]: With dead ends: 61 [2021-08-30 19:12:35,742 INFO L226 Difference]: Without dead ends: 61 [2021-08-30 19:12:35,742 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.80ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-30 19:12:35,743 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.93ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:35,743 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 13 Invalid, 158 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [9 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 71.93ms Time] [2021-08-30 19:12:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-30 19:12:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-08-30 19:12:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 53 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-08-30 19:12:35,758 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 45 [2021-08-30 19:12:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:35,759 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-08-30 19:12:35,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 19:12:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-08-30 19:12:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-30 19:12:35,762 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:35,762 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:35,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 19:12:35,762 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2093434039, now seen corresponding path program 1 times [2021-08-30 19:12:35,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:35,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312645197] [2021-08-30 19:12:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:35,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:35,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:35,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 19:12:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-30 19:12:35,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:35,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312645197] [2021-08-30 19:12:35,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312645197] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 19:12:35,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 19:12:35,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 19:12:35,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831130418] [2021-08-30 19:12:35,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 19:12:35,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:35,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 19:12:35,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-30 19:12:35,957 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 19:12:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:36,169 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-08-30 19:12:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 19:12:36,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-08-30 19:12:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:36,170 INFO L225 Difference]: With dead ends: 68 [2021-08-30 19:12:36,170 INFO L226 Difference]: Without dead ends: 68 [2021-08-30 19:12:36,171 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 161.91ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-30 19:12:36,171 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.82ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:36,171 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 10 Invalid, 173 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [21 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 88.82ms Time] [2021-08-30 19:12:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-30 19:12:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-08-30 19:12:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.14) internal successors, (57), 55 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-08-30 19:12:36,174 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 45 [2021-08-30 19:12:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:36,175 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-08-30 19:12:36,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 19:12:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-08-30 19:12:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-30 19:12:36,176 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:36,176 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:36,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 19:12:36,176 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting getNumbers2Err2REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:36,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:36,176 INFO L82 PathProgramCache]: Analyzing trace with hash -471945815, now seen corresponding path program 1 times [2021-08-30 19:12:36,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:36,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169702041] [2021-08-30 19:12:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:36,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:36,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:36,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 19:12:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:36,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:36,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169702041] [2021-08-30 19:12:36,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169702041] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 19:12:36,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 19:12:36,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 19:12:36,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766363034] [2021-08-30 19:12:36,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 19:12:36,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 19:12:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 19:12:36,234 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 19:12:36,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:36,295 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-08-30 19:12:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 19:12:36,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2021-08-30 19:12:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:36,296 INFO L225 Difference]: With dead ends: 62 [2021-08-30 19:12:36,296 INFO L226 Difference]: Without dead ends: 62 [2021-08-30 19:12:36,297 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.66ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 19:12:36,297 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.60ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.22ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:36,297 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 12 Invalid, 79 Unknown, 0 Unchecked, 0.60ms Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 56.22ms Time] [2021-08-30 19:12:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-30 19:12:36,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-30 19:12:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.12) internal successors, (56), 54 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-08-30 19:12:36,314 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 46 [2021-08-30 19:12:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:36,315 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-08-30 19:12:36,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 19:12:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-08-30 19:12:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-30 19:12:36,320 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:36,320 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:36,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 19:12:36,321 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting getNumbers2Err3REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:36,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:36,321 INFO L82 PathProgramCache]: Analyzing trace with hash -471945814, now seen corresponding path program 1 times [2021-08-30 19:12:36,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:36,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658302448] [2021-08-30 19:12:36,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:36,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:36,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:36,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 19:12:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:36,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:36,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658302448] [2021-08-30 19:12:36,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658302448] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 19:12:36,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 19:12:36,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 19:12:36,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845820558] [2021-08-30 19:12:36,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 19:12:36,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:36,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 19:12:36,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 19:12:36,404 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 19:12:36,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:36,475 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-08-30 19:12:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 19:12:36,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2021-08-30 19:12:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:36,479 INFO L225 Difference]: With dead ends: 65 [2021-08-30 19:12:36,479 INFO L226 Difference]: Without dead ends: 65 [2021-08-30 19:12:36,479 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.04ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 19:12:36,481 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.39ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:36,481 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 112 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 66.39ms Time] [2021-08-30 19:12:36,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-30 19:12:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-08-30 19:12:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 55 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-08-30 19:12:36,489 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 46 [2021-08-30 19:12:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:36,491 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-08-30 19:12:36,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 19:12:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-08-30 19:12:36,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-30 19:12:36,492 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:36,492 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:36,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-30 19:12:36,492 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1409815757, now seen corresponding path program 1 times [2021-08-30 19:12:36,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:36,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937315416] [2021-08-30 19:12:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:36,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:36,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:36,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 19:12:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-30 19:12:36,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:36,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937315416] [2021-08-30 19:12:36,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937315416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:36,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899527850] [2021-08-30 19:12:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:36,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:36,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 19:12:36,653 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) [2021-08-30 19:12:36,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 19:12:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:36,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-30 19:12:36,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 19:12:36,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 19:12:36,735 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 19:12:36,736 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 9 treesize of output 15 [2021-08-30 19:12:37,420 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 19:12:37,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-08-30 19:12:37,438 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-30 19:12:37,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-08-30 19:12:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:37,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 19:12:37,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899527850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:37,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 19:12:37,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-08-30 19:12:37,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965466687] [2021-08-30 19:12:37,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-30 19:12:37,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:37,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-30 19:12:37,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-30 19:12:37,834 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 19:12:38,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:38,008 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-08-30 19:12:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 19:12:38,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 50 [2021-08-30 19:12:38,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:38,009 INFO L225 Difference]: With dead ends: 67 [2021-08-30 19:12:38,009 INFO L226 Difference]: Without dead ends: 67 [2021-08-30 19:12:38,010 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 281.56ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-08-30 19:12:38,010 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 99.35ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:38,010 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 17 Invalid, 208 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [15 Valid, 185 Invalid, 0 Unknown, 8 Unchecked, 99.35ms Time] [2021-08-30 19:12:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-30 19:12:38,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-08-30 19:12:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-08-30 19:12:38,013 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 50 [2021-08-30 19:12:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:38,014 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-08-30 19:12:38,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 19:12:38,014 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-08-30 19:12:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-30 19:12:38,015 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:38,015 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:38,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 19:12:38,228 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 [2021-08-30 19:12:38,229 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting getNumbers2Err3REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:38,229 INFO L82 PathProgramCache]: Analyzing trace with hash 754615462, now seen corresponding path program 1 times [2021-08-30 19:12:38,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:38,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282101547] [2021-08-30 19:12:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:38,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:38,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:38,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 19:12:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:38,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:38,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282101547] [2021-08-30 19:12:38,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282101547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:38,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457477379] [2021-08-30 19:12:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:38,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:38,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 19:12:38,319 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) [2021-08-30 19:12:38,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 19:12:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:38,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 19:12:38,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 19:12:38,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 19:12:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:38,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 19:12:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:38,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457477379] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 19:12:38,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 19:12:38,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 7 [2021-08-30 19:12:38,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787651091] [2021-08-30 19:12:38,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 19:12:38,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:38,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 19:12:38,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-30 19:12:38,627 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 19:12:38,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:38,764 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2021-08-30 19:12:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 19:12:38,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2021-08-30 19:12:38,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:38,765 INFO L225 Difference]: With dead ends: 82 [2021-08-30 19:12:38,765 INFO L226 Difference]: Without dead ends: 82 [2021-08-30 19:12:38,765 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.58ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-30 19:12:38,766 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.18ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:38,766 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 25 Invalid, 216 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [9 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 116.18ms Time] [2021-08-30 19:12:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-30 19:12:38,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-08-30 19:12:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 70 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2021-08-30 19:12:38,769 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 51 [2021-08-30 19:12:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:38,769 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2021-08-30 19:12:38,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 19:12:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2021-08-30 19:12:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-30 19:12:38,770 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:38,770 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:38,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-30 19:12:38,980 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 [2021-08-30 19:12:38,981 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1831341513, now seen corresponding path program 2 times [2021-08-30 19:12:38,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:38,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94921690] [2021-08-30 19:12:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:38,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:39,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:39,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 19:12:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-30 19:12:39,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:39,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94921690] [2021-08-30 19:12:39,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94921690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:39,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807455615] [2021-08-30 19:12:39,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 19:12:39,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:39,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 19:12:39,161 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) [2021-08-30 19:12:39,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 19:12:39,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 19:12:39,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 19:12:39,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-30 19:12:39,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 19:12:39,238 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 19:12:39,238 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 9 treesize of output 15 [2021-08-30 19:12:39,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 19:12:39,853 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 19:12:39,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-08-30 19:12:39,867 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-30 19:12:39,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-08-30 19:12:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:40,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 19:12:40,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807455615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:40,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 19:12:40,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2021-08-30 19:12:40,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889151014] [2021-08-30 19:12:40,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-30 19:12:40,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:40,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-30 19:12:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-30 19:12:40,360 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 19:12:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:40,562 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-08-30 19:12:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 19:12:40,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 55 [2021-08-30 19:12:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:40,563 INFO L225 Difference]: With dead ends: 78 [2021-08-30 19:12:40,563 INFO L226 Difference]: Without dead ends: 78 [2021-08-30 19:12:40,563 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 339.96ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-08-30 19:12:40,564 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 127.63ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:40,564 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 334 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [15 Valid, 232 Invalid, 0 Unknown, 87 Unchecked, 127.63ms Time] [2021-08-30 19:12:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-30 19:12:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-08-30 19:12:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 70 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-08-30 19:12:40,566 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 55 [2021-08-30 19:12:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:40,567 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-08-30 19:12:40,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 19:12:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-08-30 19:12:40,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-30 19:12:40,568 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:40,568 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:40,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 19:12:40,768 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 [2021-08-30 19:12:40,768 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:40,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:40,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1486456989, now seen corresponding path program 1 times [2021-08-30 19:12:40,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:40,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332916184] [2021-08-30 19:12:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:40,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:40,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:40,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-30 19:12:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:40,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:40,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:40,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332916184] [2021-08-30 19:12:40,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332916184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:40,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200659414] [2021-08-30 19:12:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:40,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:40,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 19:12:40,878 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) [2021-08-30 19:12:40,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-30 19:12:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:40,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 19:12:40,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 19:12:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:41,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 19:12:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:41,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200659414] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 19:12:41,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 19:12:41,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2021-08-30 19:12:41,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745764701] [2021-08-30 19:12:41,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 19:12:41,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:41,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 19:12:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-30 19:12:41,191 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 19:12:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:41,272 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2021-08-30 19:12:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 19:12:41,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2021-08-30 19:12:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:41,273 INFO L225 Difference]: With dead ends: 89 [2021-08-30 19:12:41,273 INFO L226 Difference]: Without dead ends: 89 [2021-08-30 19:12:41,273 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.18ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-30 19:12:41,274 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.86ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:41,275 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 15 Invalid, 124 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [16 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 73.86ms Time] [2021-08-30 19:12:41,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-30 19:12:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-08-30 19:12:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 78 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-08-30 19:12:41,278 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 59 [2021-08-30 19:12:41,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:41,279 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-08-30 19:12:41,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 19:12:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-08-30 19:12:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-30 19:12:41,281 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:41,281 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:41,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-30 19:12:41,487 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 [2021-08-30 19:12:41,487 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:41,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:41,487 INFO L82 PathProgramCache]: Analyzing trace with hash 256397901, now seen corresponding path program 3 times [2021-08-30 19:12:41,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:41,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777536500] [2021-08-30 19:12:41,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:41,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:41,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:41,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 19:12:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-30 19:12:41,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:41,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777536500] [2021-08-30 19:12:41,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777536500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:41,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180399782] [2021-08-30 19:12:41,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 19:12:41,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:41,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 19:12:41,716 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) [2021-08-30 19:12:41,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-30 19:12:41,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-30 19:12:41,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 19:12:41,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-30 19:12:41,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 19:12:41,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 19:12:42,081 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 19:12:42,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-08-30 19:12:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-08-30 19:12:42,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 19:12:42,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180399782] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 19:12:42,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 19:12:42,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2021-08-30 19:12:42,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194575974] [2021-08-30 19:12:42,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 19:12:42,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 19:12:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-30 19:12:42,270 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 19:12:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:42,444 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2021-08-30 19:12:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 19:12:42,444 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2021-08-30 19:12:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:42,445 INFO L225 Difference]: With dead ends: 85 [2021-08-30 19:12:42,445 INFO L226 Difference]: Without dead ends: 85 [2021-08-30 19:12:42,446 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 284.10ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-30 19:12:42,446 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.35ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.94ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:42,446 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 12 Invalid, 178 Unknown, 0 Unchecked, 1.35ms Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 93.94ms Time] [2021-08-30 19:12:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-30 19:12:42,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-08-30 19:12:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 77 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-08-30 19:12:42,461 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 60 [2021-08-30 19:12:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:42,461 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-08-30 19:12:42,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 19:12:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-08-30 19:12:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-30 19:12:42,462 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:42,462 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:42,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-30 19:12:42,672 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 [2021-08-30 19:12:42,673 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting getNumbers2Err3REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:42,673 INFO L82 PathProgramCache]: Analyzing trace with hash -766130006, now seen corresponding path program 2 times [2021-08-30 19:12:42,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:42,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626644404] [2021-08-30 19:12:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:42,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:42,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:42,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 19:12:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-08-30 19:12:42,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:42,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626644404] [2021-08-30 19:12:42,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626644404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:42,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325233257] [2021-08-30 19:12:42,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 19:12:42,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:42,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 19:12:42,799 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) [2021-08-30 19:12:42,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-30 19:12:42,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 19:12:42,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 19:12:42,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 19:12:42,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 19:12:42,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 19:12:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-08-30 19:12:43,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 19:12:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-08-30 19:12:43,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325233257] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 19:12:43,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 19:12:43,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2021-08-30 19:12:43,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089834230] [2021-08-30 19:12:43,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-30 19:12:43,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:43,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-30 19:12:43,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-30 19:12:43,733 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 19:12:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:43,921 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-08-30 19:12:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 19:12:43,922 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 66 [2021-08-30 19:12:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:43,923 INFO L225 Difference]: With dead ends: 84 [2021-08-30 19:12:43,923 INFO L226 Difference]: Without dead ends: 84 [2021-08-30 19:12:43,923 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 289.27ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-08-30 19:12:43,924 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.90ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.95ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:43,924 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 24 Invalid, 217 Unknown, 0 Unchecked, 1.90ms Time], IncrementalHoareTripleChecker [15 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 103.95ms Time] [2021-08-30 19:12:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-30 19:12:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-08-30 19:12:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 74 states have (on average 1.054054054054054) internal successors, (78), 76 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-08-30 19:12:43,926 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 66 [2021-08-30 19:12:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:43,926 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-08-30 19:12:43,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 19:12:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-08-30 19:12:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-30 19:12:43,927 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:43,927 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:43,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-30 19:12:44,128 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 [2021-08-30 19:12:44,128 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:44,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:44,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1204178333, now seen corresponding path program 2 times [2021-08-30 19:12:44,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:44,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128621381] [2021-08-30 19:12:44,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:44,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:44,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:44,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-30 19:12:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:44,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 19:12:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 19:12:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:44,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 19:12:44,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128621381] [2021-08-30 19:12:44,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128621381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 19:12:44,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744915566] [2021-08-30 19:12:44,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 19:12:44,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 19:12:44,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 19:12:44,255 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) [2021-08-30 19:12:44,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-30 19:12:44,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 19:12:44,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 19:12:44,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 19:12:44,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 19:12:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:44,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 19:12:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-30 19:12:44,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744915566] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 19:12:44,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 19:12:44,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 16 [2021-08-30 19:12:44,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557973805] [2021-08-30 19:12:44,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-30 19:12:44,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 19:12:44,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-30 19:12:44,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-30 19:12:44,667 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 16 states, 15 states have (on average 4.666666666666667) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 19:12:44,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 19:12:44,785 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-08-30 19:12:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 19:12:44,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.666666666666667) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 79 [2021-08-30 19:12:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 19:12:44,787 INFO L225 Difference]: With dead ends: 104 [2021-08-30 19:12:44,787 INFO L226 Difference]: Without dead ends: 104 [2021-08-30 19:12:44,787 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 77.27ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-30 19:12:44,789 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.80ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.62ms IncrementalHoareTripleChecker+Time [2021-08-30 19:12:44,790 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 168 Unknown, 0 Unchecked, 2.80ms Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 106.62ms Time] [2021-08-30 19:12:44,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-30 19:12:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-08-30 19:12:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 96 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 19:12:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-08-30 19:12:44,793 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 79 [2021-08-30 19:12:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 19:12:44,794 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-08-30 19:12:44,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.666666666666667) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 19:12:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-08-30 19:12:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-30 19:12:44,795 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 19:12:44,795 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 19:12:44,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-30 19:12:45,008 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 [2021-08-30 19:12:45,009 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-08-30 19:12:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 19:12:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1646357859, now seen corresponding path program 3 times [2021-08-30 19:12:45,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 19:12:45,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314745585] [2021-08-30 19:12:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 19:12:45,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 19:12:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 19:12:45,055 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 19:12:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 19:12:45,155 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 19:12:45,155 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 19:12:45,156 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0REQUIRES_VIOLATION (8 of 9 remaining) [2021-08-30 19:12:45,158 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbers2Err0REQUIRES_VIOLATION (7 of 9 remaining) [2021-08-30 19:12:45,159 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbers2Err1REQUIRES_VIOLATION (6 of 9 remaining) [2021-08-30 19:12:45,160 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbers2Err2REQUIRES_VIOLATION (5 of 9 remaining) [2021-08-30 19:12:45,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbers2Err3REQUIRES_VIOLATION (4 of 9 remaining) [2021-08-30 19:12:45,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (3 of 9 remaining) [2021-08-30 19:12:45,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ENSURES_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2021-08-30 19:12:45,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbersErr0REQUIRES_VIOLATION (1 of 9 remaining) [2021-08-30 19:12:45,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbersErr1REQUIRES_VIOLATION (0 of 9 remaining) [2021-08-30 19:12:45,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-30 19:12:45,168 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 19:12:45,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 07:12:45 BoogieIcfgContainer [2021-08-30 19:12:45,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 19:12:45,236 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 19:12:45,236 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 19:12:45,236 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 19:12:45,237 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:12:31" (3/4) ... [2021-08-30 19:12:45,239 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-30 19:12:45,305 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 19:12:45,305 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 19:12:45,306 INFO L158 Benchmark]: Toolchain (without parser) took 14110.41ms. Allocated memory was 69.2MB in the beginning and 134.2MB in the end (delta: 65.0MB). Free memory was 49.6MB in the beginning and 103.8MB in the end (delta: -54.2MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2021-08-30 19:12:45,307 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 69.2MB. Free memory was 50.2MB in the beginning and 50.2MB in the end (delta: 47.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 19:12:45,307 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.84ms. Allocated memory is still 69.2MB. Free memory was 49.5MB in the beginning and 40.3MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-30 19:12:45,308 INFO L158 Benchmark]: Boogie Preprocessor took 77.44ms. Allocated memory is still 69.2MB. Free memory was 40.3MB in the beginning and 52.5MB in the end (delta: -12.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 19:12:45,311 INFO L158 Benchmark]: RCFGBuilder took 254.59ms. Allocated memory is still 69.2MB. Free memory was 52.3MB in the beginning and 43.2MB in the end (delta: 9.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-08-30 19:12:45,311 INFO L158 Benchmark]: TraceAbstraction took 13501.67ms. Allocated memory was 69.2MB in the beginning and 134.2MB in the end (delta: 65.0MB). Free memory was 42.6MB in the beginning and 108.0MB in the end (delta: -65.4MB). Peak memory consumption was 75.2MB. Max. memory is 16.1GB. [2021-08-30 19:12:45,312 INFO L158 Benchmark]: Witness Printer took 69.24ms. Allocated memory is still 134.2MB. Free memory was 108.0MB in the beginning and 103.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 19:12:45,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 69.2MB. Free memory was 50.2MB in the beginning and 50.2MB in the end (delta: 47.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.84ms. Allocated memory is still 69.2MB. Free memory was 49.5MB in the beginning and 40.3MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 77.44ms. Allocated memory is still 69.2MB. Free memory was 40.3MB in the beginning and 52.5MB in the end (delta: -12.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 254.59ms. Allocated memory is still 69.2MB. Free memory was 52.3MB in the beginning and 43.2MB in the end (delta: 9.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 13501.67ms. Allocated memory was 69.2MB in the beginning and 134.2MB in the end (delta: 65.0MB). Free memory was 42.6MB in the beginning and 108.0MB in the end (delta: -65.4MB). Peak memory consumption was 75.2MB. Max. memory is 16.1GB. * Witness Printer took 69.24ms. Allocated memory is still 134.2MB. Free memory was 108.0MB in the beginning and 103.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 26]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1] int array[10]; VAL [\old(array)=null, \old(array)=null, array={11:0}] [L25] CALL, EXPR getNumbers2() VAL [array={11:0}] [L13] CALL, EXPR getNumbers() VAL [array={11:0}] [L5] int i = 0; VAL [array={11:0}, i=0] [L5] COND TRUE i < 10 VAL [array={11:0}, i=0] [L6] array[i] = i VAL [array={11:0}, i=0] [L5] ++i VAL [array={11:0}, i=1] [L5] COND TRUE i < 10 VAL [array={11:0}, i=1] [L6] array[i] = i VAL [array={11:0}, i=1] [L5] ++i VAL [array={11:0}, i=2] [L5] COND TRUE i < 10 VAL [array={11:0}, i=2] [L6] array[i] = i VAL [array={11:0}, i=2] [L5] ++i VAL [array={11:0}, i=3] [L5] COND TRUE i < 10 VAL [array={11:0}, i=3] [L6] array[i] = i VAL [array={11:0}, i=3] [L5] ++i VAL [array={11:0}, i=4] [L5] COND TRUE i < 10 VAL [array={11:0}, i=4] [L6] array[i] = i VAL [array={11:0}, i=4] [L5] ++i VAL [array={11:0}, i=5] [L5] COND TRUE i < 10 VAL [array={11:0}, i=5] [L6] array[i] = i VAL [array={11:0}, i=5] [L5] ++i VAL [array={11:0}, i=6] [L5] COND TRUE i < 10 VAL [array={11:0}, i=6] [L6] array[i] = i VAL [array={11:0}, i=6] [L5] ++i VAL [array={11:0}, i=7] [L5] COND TRUE i < 10 VAL [array={11:0}, i=7] [L6] array[i] = i VAL [array={11:0}, i=7] [L5] ++i VAL [array={11:0}, i=8] [L5] COND TRUE i < 10 VAL [array={11:0}, i=8] [L6] array[i] = i VAL [array={11:0}, i=8] [L5] ++i VAL [array={11:0}, i=9] [L5] COND TRUE i < 10 VAL [array={11:0}, i=9] [L6] array[i] = i VAL [array={11:0}, i=9] [L5] ++i VAL [array={11:0}, i=10] [L5] COND FALSE !(i < 10) VAL [array={11:0}, i=10] [L9] return array; VAL [\result={11:0}, array={11:0}, i=10] [L13] RET, EXPR getNumbers() VAL [array={11:0}, getNumbers()={11:0}] [L13] int* numbers = getNumbers(); [L15] int numbers2[10]; [L17] int i = 0; VAL [array={11:0}, i=0, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=0, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=0, numbers={11:0}, numbers2={10:0}, numbers[i]=0] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=0, numbers={11:0}, numbers2={10:0}, numbers[i]=0] [L17] ++i VAL [array={11:0}, i=1, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=1, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=1, numbers={11:0}, numbers2={10:0}, numbers[i]=1] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=1, numbers={11:0}, numbers2={10:0}, numbers[i]=1] [L17] ++i VAL [array={11:0}, i=2, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=2, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=2, numbers={11:0}, numbers2={10:0}, numbers[i]=2] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=2, numbers={11:0}, numbers2={10:0}, numbers[i]=2] [L17] ++i VAL [array={11:0}, i=3, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=3, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=3, numbers={11:0}, numbers2={10:0}, numbers[i]=3] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=3, numbers={11:0}, numbers2={10:0}, numbers[i]=3] [L17] ++i VAL [array={11:0}, i=4, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=4, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=4, numbers={11:0}, numbers2={10:0}, numbers[i]=4] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=4, numbers={11:0}, numbers2={10:0}, numbers[i]=4] [L17] ++i VAL [array={11:0}, i=5, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=5, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=5, numbers={11:0}, numbers2={10:0}, numbers[i]=5] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=5, numbers={11:0}, numbers2={10:0}, numbers[i]=5] [L17] ++i VAL [array={11:0}, i=6, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=6, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=6, numbers={11:0}, numbers2={10:0}, numbers[i]=6] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=6, numbers={11:0}, numbers2={10:0}, numbers[i]=6] [L17] ++i VAL [array={11:0}, i=7, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=7, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=7, numbers={11:0}, numbers2={10:0}, numbers[i]=7] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=7, numbers={11:0}, numbers2={10:0}, numbers[i]=7] [L17] ++i VAL [array={11:0}, i=8, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=8, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=8, numbers={11:0}, numbers2={10:0}, numbers[i]=8] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=8, numbers={11:0}, numbers2={10:0}, numbers[i]=8] [L17] ++i VAL [array={11:0}, i=9, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=9, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=9, numbers={11:0}, numbers2={10:0}, numbers[i]=9] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=9, numbers={11:0}, numbers2={10:0}, numbers[i]=9] [L17] ++i VAL [array={11:0}, i=10, numbers={11:0}, numbers2={10:0}] [L17] COND FALSE !(i < 10) VAL [array={11:0}, i=10, numbers={11:0}, numbers2={10:0}] [L21] return numbers2; [L21] return numbers2; VAL [\result={10:0}, array={11:0}, i=10, numbers={11:0}] [L25] RET, EXPR getNumbers2() VAL [array={11:0}, getNumbers2()={10:0}] [L25] int *numbers = getNumbers2(); [L26] numbers[0] = 100 - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 24]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 13361.68ms, OverallIterations: 17, TraceHistogramMax: 10, EmptinessCheckTime: 27.60ms, AutomataDifference: 2426.72ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 13.38ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 496 SdHoareTripleChecker+Valid, 1525.29ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 494 mSDsluCounter, 266 SdHoareTripleChecker+Invalid, 1222.26ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 95 IncrementalHoareTripleChecker+Unchecked, 1007 mSDsCounter, 185 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2453 IncrementalHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 185 mSolverCounterUnsat, 101 mSDtfsCounter, 2453 mSolverCounterSat, 37.12ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 987 GetRequests, 790 SyntacticMatches, 4 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2127.35ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=16, InterpolantAutomatonStates: 139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 115.08ms AutomataMinimizationTime, 16 MinimizatonAttempts, 18 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 139.97ms SsaConstructionTime, 492.21ms SatisfiabilityAnalysisTime, 7422.32ms InterpolantComputationTime, 1265 NumberOfCodeBlocks, 1178 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1429 ConstructedInterpolants, 19 QuantifiedInterpolants, 10269 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1527 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 3347/3777 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 RESULT: Ultimate proved your program to be incorrect! [2021-08-30 19:12:45,361 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...