./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.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/ldv-memsafety/ArraysOfVariableLength4.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 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 17:39:06,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 17:39:06,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 17:39:06,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 17:39:06,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 17:39:06,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 17:39:06,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 17:39:06,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 17:39:06,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 17:39:06,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 17:39:06,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 17:39:06,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 17:39:06,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 17:39:06,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 17:39:06,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 17:39:06,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 17:39:06,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 17:39:06,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 17:39:06,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 17:39:06,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 17:39:06,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 17:39:06,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 17:39:06,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 17:39:06,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 17:39:06,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 17:39:06,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 17:39:06,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 17:39:06,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 17:39:06,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 17:39:06,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 17:39:06,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 17:39:06,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 17:39:06,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 17:39:06,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 17:39:06,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 17:39:06,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 17:39:06,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 17:39:06,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 17:39:06,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 17:39:06,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 17:39:06,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 17:39:06,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 17:39:06,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 17:39:06,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 17:39:06,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 17:39:06,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 17:39:06,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 17:39:06,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 17:39:06,927 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 17:39:06,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 17:39:06,928 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 17:39:06,928 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 17:39:06,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 17:39:06,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 17:39:06,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 17:39:06,929 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 17:39:06,930 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 17:39:06,930 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 17:39:06,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 17:39:06,930 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 17:39:06,930 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 17:39:06,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 17:39:06,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 17:39:06,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 17:39:06,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 17:39:06,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:39:06,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 17:39:06,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 17:39:06,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 17:39:06,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 17:39:06,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 17:39:06,932 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 [2021-08-30 17:39:07,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 17:39:07,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 17:39:07,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 17:39:07,255 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 17:39:07,255 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 17:39:07,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2021-08-30 17:39:07,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18f1a6808/57402d30a95f4600a6a8ac496ab4df38/FLAG3ef99e1cc [2021-08-30 17:39:07,688 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 17:39:07,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2021-08-30 17:39:07,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18f1a6808/57402d30a95f4600a6a8ac496ab4df38/FLAG3ef99e1cc [2021-08-30 17:39:07,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18f1a6808/57402d30a95f4600a6a8ac496ab4df38 [2021-08-30 17:39:07,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 17:39:07,712 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 17:39:07,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 17:39:07,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 17:39:07,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 17:39:07,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:39:07" (1/1) ... [2021-08-30 17:39:07,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b08f4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:07, skipping insertion in model container [2021-08-30 17:39:07,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:39:07" (1/1) ... [2021-08-30 17:39:07,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 17:39:07,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 17:39:07,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:39:07,866 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 17:39:07,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:39:07,889 INFO L208 MainTranslator]: Completed translation [2021-08-30 17:39:07,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:07 WrapperNode [2021-08-30 17:39:07,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 17:39:07,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 17:39:07,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 17:39:07,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 17:39:07,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:07" (1/1) ... [2021-08-30 17:39:07,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:07" (1/1) ... [2021-08-30 17:39:07,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:07" (1/1) ... [2021-08-30 17:39:07,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:07" (1/1) ... [2021-08-30 17:39:07,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:07" (1/1) ... [2021-08-30 17:39:07,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:07" (1/1) ... [2021-08-30 17:39:07,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:07" (1/1) ... [2021-08-30 17:39:07,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 17:39:07,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 17:39:07,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 17:39:07,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 17:39:07,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:07" (1/1) ... [2021-08-30 17:39:07,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:39:07,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:07,982 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 17:39:08,008 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 17:39:08,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 17:39:08,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 17:39:08,022 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-30 17:39:08,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 17:39:08,022 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-30 17:39:08,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 17:39:08,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 17:39:08,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 17:39:08,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 17:39:08,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 17:39:08,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 17:39:08,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 17:39:08,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 17:39:08,169 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-30 17:39:08,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:39:08 BoogieIcfgContainer [2021-08-30 17:39:08,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 17:39:08,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 17:39:08,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 17:39:08,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 17:39:08,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:39:07" (1/3) ... [2021-08-30 17:39:08,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a24201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:39:08, skipping insertion in model container [2021-08-30 17:39:08,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:07" (2/3) ... [2021-08-30 17:39:08,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a24201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:39:08, skipping insertion in model container [2021-08-30 17:39:08,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:39:08" (3/3) ... [2021-08-30 17:39:08,176 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4.c [2021-08-30 17:39:08,180 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 17:39:08,180 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-08-30 17:39:08,207 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 17:39:08,212 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 17:39:08,212 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-30 17:39:08,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:39:08,225 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:08,226 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:08,226 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:08,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-08-30 17:39:08,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:08,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571504245] [2021-08-30 17:39:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:08,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:08,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:08,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:08,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571504245] [2021-08-30 17:39:08,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571504245] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:08,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:08,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 17:39:08,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082624657] [2021-08-30 17:39:08,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:39:08,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:08,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:39:08,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:39:08,486 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:08,678 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-08-30 17:39:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:39:08,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 17:39:08,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:08,684 INFO L225 Difference]: With dead ends: 58 [2021-08-30 17:39:08,685 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 17:39:08,687 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.18ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:39:08,691 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.19ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.34ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:08,692 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 14 Invalid, 106 Unknown, 0 Unchecked, 2.19ms Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 161.34ms Time] [2021-08-30 17:39:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 17:39:08,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-08-30 17:39:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 33 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-30 17:39:08,722 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-08-30 17:39:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:08,723 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-30 17:39:08,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-30 17:39:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 17:39:08,724 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:08,724 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:08,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 17:39:08,724 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:08,727 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-08-30 17:39:08,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:08,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815031906] [2021-08-30 17:39:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:08,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:08,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:08,798 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 17:39:08,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:08,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815031906] [2021-08-30 17:39:08,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815031906] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:08,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:08,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:39:08,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680343638] [2021-08-30 17:39:08,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:39:08,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:08,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:39:08,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:39:08,801 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:08,869 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-08-30 17:39:08,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:39:08,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 17:39:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:08,871 INFO L225 Difference]: With dead ends: 49 [2021-08-30 17:39:08,871 INFO L226 Difference]: Without dead ends: 49 [2021-08-30 17:39:08,871 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.56ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:39:08,872 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.13ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:08,872 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 11 Invalid, 96 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 55.13ms Time] [2021-08-30 17:39:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-30 17:39:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-08-30 17:39:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-30 17:39:08,892 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2021-08-30 17:39:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:08,892 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-30 17:39:08,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-30 17:39:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 17:39:08,893 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:08,893 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:08,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 17:39:08,893 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:08,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:08,894 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2021-08-30 17:39:08,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:08,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238298834] [2021-08-30 17:39:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:08,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:08,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:08,946 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 17:39:08,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:08,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238298834] [2021-08-30 17:39:08,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238298834] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:08,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:08,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:39:08,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846682872] [2021-08-30 17:39:08,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:39:08,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:08,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:39:08,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:39:08,948 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:09,019 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-08-30 17:39:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:39:09,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-30 17:39:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:09,037 INFO L225 Difference]: With dead ends: 40 [2021-08-30 17:39:09,037 INFO L226 Difference]: Without dead ends: 40 [2021-08-30 17:39:09,038 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.56ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:39:09,039 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.64ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:09,039 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 14 Invalid, 127 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 52.64ms Time] [2021-08-30 17:39:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-30 17:39:09,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-30 17:39:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-08-30 17:39:09,053 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2021-08-30 17:39:09,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:09,053 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-08-30 17:39:09,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-08-30 17:39:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 17:39:09,054 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:09,054 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:09,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 17:39:09,054 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:09,055 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2021-08-30 17:39:09,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:09,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836494218] [2021-08-30 17:39:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:09,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,125 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 17:39:09,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:09,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836494218] [2021-08-30 17:39:09,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836494218] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:09,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:09,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:39:09,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354395749] [2021-08-30 17:39:09,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:39:09,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:09,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:39:09,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:39:09,128 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:09,246 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-08-30 17:39:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:39:09,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-30 17:39:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:09,248 INFO L225 Difference]: With dead ends: 46 [2021-08-30 17:39:09,248 INFO L226 Difference]: Without dead ends: 46 [2021-08-30 17:39:09,248 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.00ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:39:09,256 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 57 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.72ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.81ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:09,257 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 14 Invalid, 139 Unknown, 0 Unchecked, 3.72ms Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 83.81ms Time] [2021-08-30 17:39:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-30 17:39:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-08-30 17:39:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-08-30 17:39:09,269 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2021-08-30 17:39:09,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:09,269 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-08-30 17:39:09,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-08-30 17:39:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:39:09,270 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:09,271 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:09,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 17:39:09,271 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-08-30 17:39:09,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:09,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415624434] [2021-08-30 17:39:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:09,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,357 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 17:39:09,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:09,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415624434] [2021-08-30 17:39:09,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415624434] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:09,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:09,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:39:09,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292971150] [2021-08-30 17:39:09,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:39:09,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:09,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:39:09,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:39:09,361 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:39:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:09,473 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-08-30 17:39:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:39:09,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-08-30 17:39:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:09,477 INFO L225 Difference]: With dead ends: 46 [2021-08-30 17:39:09,477 INFO L226 Difference]: Without dead ends: 43 [2021-08-30 17:39:09,477 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.56ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:39:09,481 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.42ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:09,481 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 14 Invalid, 130 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 63.42ms Time] [2021-08-30 17:39:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-30 17:39:09,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-08-30 17:39:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-08-30 17:39:09,489 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2021-08-30 17:39:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:09,490 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-08-30 17:39:09,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:39:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-08-30 17:39:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 17:39:09,493 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:09,493 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:09,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 17:39:09,494 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2021-08-30 17:39:09,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:09,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702516749] [2021-08-30 17:39:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:09,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,543 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 17:39:09,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:09,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702516749] [2021-08-30 17:39:09,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702516749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:09,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956364496] [2021-08-30 17:39:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:09,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:09,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:09,556 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 17:39:09,568 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 17:39:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 17:39:09,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:09,654 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 17:39:09,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:09,731 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 17:39:09,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956364496] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:09,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:09,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2021-08-30 17:39:09,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342350561] [2021-08-30 17:39:09,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:39:09,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:09,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:39:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:39:09,733 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:09,857 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-08-30 17:39:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:39:09,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-30 17:39:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:09,860 INFO L225 Difference]: With dead ends: 66 [2021-08-30 17:39:09,860 INFO L226 Difference]: Without dead ends: 66 [2021-08-30 17:39:09,860 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.45ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:39:09,861 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.26ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:09,862 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 16 Invalid, 155 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [10 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 80.26ms Time] [2021-08-30 17:39:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-30 17:39:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2021-08-30 17:39:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 49 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-08-30 17:39:09,883 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 16 [2021-08-30 17:39:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:09,883 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-08-30 17:39:09,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:09,884 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-08-30 17:39:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 17:39:09,884 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:09,885 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:09,905 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 17:39:10,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-30 17:39:10,093 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:10,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2021-08-30 17:39:10,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:10,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213254605] [2021-08-30 17:39:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:10,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-30 17:39:10,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:10,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213254605] [2021-08-30 17:39:10,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213254605] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:10,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:10,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:39:10,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294702601] [2021-08-30 17:39:10,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:39:10,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:10,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:39:10,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:39:10,164 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:10,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:10,268 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-08-30 17:39:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:39:10,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 17:39:10,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:10,269 INFO L225 Difference]: With dead ends: 54 [2021-08-30 17:39:10,269 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 17:39:10,270 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.36ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:39:10,270 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.74ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.66ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:10,270 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 14 Invalid, 134 Unknown, 0 Unchecked, 0.74ms Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 64.66ms Time] [2021-08-30 17:39:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 17:39:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-30 17:39:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 48 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-08-30 17:39:10,273 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 17 [2021-08-30 17:39:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:10,273 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-08-30 17:39:10,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-08-30 17:39:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 17:39:10,274 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:10,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:10,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 17:39:10,274 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:10,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2021-08-30 17:39:10,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:10,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714525488] [2021-08-30 17:39:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:10,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:10,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:10,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714525488] [2021-08-30 17:39:10,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714525488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:10,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666179688] [2021-08-30 17:39:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:10,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:10,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:10,374 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 17:39:10,375 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 17:39:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 17:39:10,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:10,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:10,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666179688] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:10,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:10,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2021-08-30 17:39:10,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424128534] [2021-08-30 17:39:10,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:39:10,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:39:10,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:39:10,616 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-30 17:39:10,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:10,843 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-08-30 17:39:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:39:10,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2021-08-30 17:39:10,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:10,844 INFO L225 Difference]: With dead ends: 60 [2021-08-30 17:39:10,844 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 17:39:10,844 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 158.42ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-30 17:39:10,844 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.23ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:10,845 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 26 Invalid, 253 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [16 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 125.23ms Time] [2021-08-30 17:39:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 17:39:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-30 17:39:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-08-30 17:39:10,847 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 20 [2021-08-30 17:39:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:10,847 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-08-30 17:39:10,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-30 17:39:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-08-30 17:39:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-30 17:39:10,848 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:10,849 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:10,870 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 17:39:11,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-30 17:39:11,065 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1856317080, now seen corresponding path program 2 times [2021-08-30 17:39:11,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:11,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824313285] [2021-08-30 17:39:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:11,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:11,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:11,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:11,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824313285] [2021-08-30 17:39:11,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824313285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:11,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853179032] [2021-08-30 17:39:11,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:11,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:11,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:11,132 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 17:39:11,159 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 17:39:11,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:39:11,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:11,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 17:39:11,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:11,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:11,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853179032] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:11,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:11,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2021-08-30 17:39:11,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502866543] [2021-08-30 17:39:11,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-30 17:39:11,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-30 17:39:11,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-08-30 17:39:11,711 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 21 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:11,989 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2021-08-30 17:39:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 17:39:11,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-08-30 17:39:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:11,990 INFO L225 Difference]: With dead ends: 68 [2021-08-30 17:39:11,990 INFO L226 Difference]: Without dead ends: 68 [2021-08-30 17:39:11,991 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 246.04ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-08-30 17:39:11,991 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 143 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.96ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 169.36ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:11,991 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 36 Invalid, 470 Unknown, 0 Unchecked, 1.96ms Time], IncrementalHoareTripleChecker [34 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 169.36ms Time] [2021-08-30 17:39:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-30 17:39:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2021-08-30 17:39:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-08-30 17:39:11,993 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 31 [2021-08-30 17:39:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:11,994 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-08-30 17:39:11,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-08-30 17:39:11,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 17:39:11,994 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:11,994 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:12,014 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 17:39:12,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:12,195 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:12,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:12,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1228723374, now seen corresponding path program 2 times [2021-08-30 17:39:12,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:12,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619224404] [2021-08-30 17:39:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:12,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:12,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:12,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619224404] [2021-08-30 17:39:12,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619224404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:12,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575068778] [2021-08-30 17:39:12,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:12,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:12,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:12,309 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 17:39:12,324 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 17:39:12,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:39:12,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:12,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-30 17:39:12,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:12,369 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:39:12,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-08-30 17:39:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-08-30 17:39:12,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:39:12,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575068778] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:12,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:39:12,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2021-08-30 17:39:12,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968899717] [2021-08-30 17:39:12,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:39:12,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:39:12,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:39:12,506 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:12,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:12,523 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-08-30 17:39:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:39:12,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-08-30 17:39:12,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:12,524 INFO L225 Difference]: With dead ends: 50 [2021-08-30 17:39:12,524 INFO L226 Difference]: Without dead ends: 50 [2021-08-30 17:39:12,524 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 69.21ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:39:12,525 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.24ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 15.16ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:12,525 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 44 Unknown, 0 Unchecked, 0.24ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 16 Unchecked, 15.16ms Time] [2021-08-30 17:39:12,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-30 17:39:12,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-30 17:39:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-08-30 17:39:12,527 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 35 [2021-08-30 17:39:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:12,527 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-08-30 17:39:12,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:12,528 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-08-30 17:39:12,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 17:39:12,528 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:12,528 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:12,547 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 17:39:12,732 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 17:39:12,733 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1228723375, now seen corresponding path program 1 times [2021-08-30 17:39:12,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:12,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156511134] [2021-08-30 17:39:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:12,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:12,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:12,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156511134] [2021-08-30 17:39:12,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156511134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:12,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296166212] [2021-08-30 17:39:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:12,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:12,869 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 17:39:12,884 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 17:39:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:12,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:13,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:13,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296166212] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:13,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:13,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2021-08-30 17:39:13,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490880135] [2021-08-30 17:39:13,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-30 17:39:13,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-30 17:39:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-30 17:39:13,279 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-30 17:39:13,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:13,651 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-08-30 17:39:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 17:39:13,652 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2021-08-30 17:39:13,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:13,652 INFO L225 Difference]: With dead ends: 86 [2021-08-30 17:39:13,652 INFO L226 Difference]: Without dead ends: 80 [2021-08-30 17:39:13,653 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 374.62ms TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-08-30 17:39:13,653 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 152 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 143.73ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:13,653 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 30 Invalid, 326 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [35 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 143.73ms Time] [2021-08-30 17:39:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-30 17:39:13,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-08-30 17:39:13,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 74 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-08-30 17:39:13,655 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 35 [2021-08-30 17:39:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:13,655 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-08-30 17:39:13,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-30 17:39:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-08-30 17:39:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-30 17:39:13,656 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:13,656 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:13,676 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 17:39:13,865 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 17:39:13,865 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:13,865 INFO L82 PathProgramCache]: Analyzing trace with hash 576253647, now seen corresponding path program 2 times [2021-08-30 17:39:13,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:13,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926637037] [2021-08-30 17:39:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:13,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:13,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:13,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:14,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:14,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926637037] [2021-08-30 17:39:14,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926637037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:14,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72531720] [2021-08-30 17:39:14,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:14,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:14,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:14,118 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 17:39:14,131 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 17:39:14,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:39:14,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:14,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:14,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:14,172 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:39:14,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-30 17:39:14,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-30 17:39:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-08-30 17:39:14,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:39:14,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72531720] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:14,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:39:14,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [15] total 17 [2021-08-30 17:39:14,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502342958] [2021-08-30 17:39:14,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:39:14,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:14,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:39:14,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-30 17:39:14,516 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:14,528 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2021-08-30 17:39:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:39:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2021-08-30 17:39:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:14,529 INFO L225 Difference]: With dead ends: 138 [2021-08-30 17:39:14,529 INFO L226 Difference]: Without dead ends: 138 [2021-08-30 17:39:14,529 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 164.66ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-30 17:39:14,530 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 9.96ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:14,530 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 50 Unknown, 0 Unchecked, 0.18ms Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 32 Unchecked, 9.96ms Time] [2021-08-30 17:39:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-30 17:39:14,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-08-30 17:39:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 128 states have (on average 1.0546875) internal successors, (135), 130 states have internal predecessors, (135), 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 17:39:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-08-30 17:39:14,533 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 65 [2021-08-30 17:39:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:14,533 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-08-30 17:39:14,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-08-30 17:39:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-30 17:39:14,534 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:14,534 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:14,553 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 17:39:14,748 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 17:39:14,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:14,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:14,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1339016000, now seen corresponding path program 1 times [2021-08-30 17:39:14,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:14,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443293318] [2021-08-30 17:39:14,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:14,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:14,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:14,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-08-30 17:39:14,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:14,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443293318] [2021-08-30 17:39:14,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443293318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:14,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806670848] [2021-08-30 17:39:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:14,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:14,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:14,801 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 17:39:14,839 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 17:39:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:14,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 17:39:14,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:15,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:15,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806670848] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:15,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:15,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 29 [2021-08-30 17:39:15,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216088711] [2021-08-30 17:39:15,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-30 17:39:15,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:15,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-30 17:39:15,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2021-08-30 17:39:15,738 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 28 states have internal predecessors, (137), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:39:16,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:16,351 INFO L93 Difference]: Finished difference Result 294 states and 319 transitions. [2021-08-30 17:39:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-30 17:39:16,351 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 28 states have internal predecessors, (137), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2021-08-30 17:39:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:16,352 INFO L225 Difference]: With dead ends: 294 [2021-08-30 17:39:16,353 INFO L226 Difference]: Without dead ends: 282 [2021-08-30 17:39:16,353 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 656.88ms TimeCoverageRelationStatistics Valid=916, Invalid=1840, Unknown=0, NotChecked=0, Total=2756 [2021-08-30 17:39:16,354 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 248 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 171.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.90ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.48ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:16,354 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 42 Invalid, 418 Unknown, 0 Unchecked, 2.90ms Time], IncrementalHoareTripleChecker [77 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 226.48ms Time] [2021-08-30 17:39:16,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-08-30 17:39:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 265. [2021-08-30 17:39:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 255 states have (on average 1.035294117647059) internal successors, (264), 257 states have internal predecessors, (264), 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 17:39:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 271 transitions. [2021-08-30 17:39:16,358 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 271 transitions. Word has length 71 [2021-08-30 17:39:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:16,359 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 271 transitions. [2021-08-30 17:39:16,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 28 states have internal predecessors, (137), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:39:16,359 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 271 transitions. [2021-08-30 17:39:16,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-08-30 17:39:16,360 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:16,361 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:16,383 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 17:39:16,576 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 17:39:16,577 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:16,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1414018991, now seen corresponding path program 1 times [2021-08-30 17:39:16,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:16,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927518268] [2021-08-30 17:39:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:16,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:16,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:16,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:17,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-08-30 17:39:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4827 backedges. 2 proven. 3645 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-08-30 17:39:17,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:17,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927518268] [2021-08-30 17:39:17,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927518268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:17,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112856826] [2021-08-30 17:39:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:17,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:17,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:17,221 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 17:39:17,231 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 17:39:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:17,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-30 17:39:17,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4827 backedges. 2471 proven. 1177 refuted. 0 times theorem prover too weak. 1179 trivial. 0 not checked. [2021-08-30 17:39:18,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4827 backedges. 2 proven. 3645 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-08-30 17:39:19,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112856826] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:19,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:19,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 75 [2021-08-30 17:39:19,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097689355] [2021-08-30 17:39:19,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-30 17:39:19,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:19,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-30 17:39:19,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=4157, Unknown=0, NotChecked=0, Total=5550 [2021-08-30 17:39:19,989 INFO L87 Difference]: Start difference. First operand 265 states and 271 transitions. Second operand has 75 states, 75 states have (on average 4.946666666666666) internal successors, (371), 74 states have internal predecessors, (371), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-30 17:39:21,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:21,485 INFO L93 Difference]: Finished difference Result 377 states and 399 transitions. [2021-08-30 17:39:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-30 17:39:21,486 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.946666666666666) internal successors, (371), 74 states have internal predecessors, (371), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 246 [2021-08-30 17:39:21,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:21,487 INFO L225 Difference]: With dead ends: 377 [2021-08-30 17:39:21,487 INFO L226 Difference]: Without dead ends: 365 [2021-08-30 17:39:21,489 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 2692.63ms TimeCoverageRelationStatistics Valid=3121, Invalid=8651, Unknown=0, NotChecked=0, Total=11772 [2021-08-30 17:39:21,490 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 402 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 275.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.28ms SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 339.19ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:21,490 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 42 Invalid, 722 Unknown, 0 Unchecked, 12.28ms Time], IncrementalHoareTripleChecker [109 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 339.19ms Time] [2021-08-30 17:39:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-30 17:39:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2021-08-30 17:39:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 355 states have (on average 1.0253521126760563) internal successors, (364), 357 states have internal predecessors, (364), 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 17:39:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 371 transitions. [2021-08-30 17:39:21,497 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 371 transitions. Word has length 246 [2021-08-30 17:39:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:21,497 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 371 transitions. [2021-08-30 17:39:21,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.946666666666666) internal successors, (371), 74 states have internal predecessors, (371), 2 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-30 17:39:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 371 transitions. [2021-08-30 17:39:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-08-30 17:39:21,502 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:21,503 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:21,524 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 17:39:21,712 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 17:39:21,713 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:21,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:21,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1912051759, now seen corresponding path program 2 times [2021-08-30 17:39:21,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:21,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108794440] [2021-08-30 17:39:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:21,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:21,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:21,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:21,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:39:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10217 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:39:21,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:21,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108794440] [2021-08-30 17:39:21,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108794440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:21,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777535562] [2021-08-30 17:39:21,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:21,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:21,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:21,926 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 17:39:21,928 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 17:39:22,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:39:22,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:22,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 17:39:22,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:22,070 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 17:39:22,070 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 17:39:22,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-30 17:39:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10217 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:39:23,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10217 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:39:23,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777535562] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:23,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:23,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 11 [2021-08-30 17:39:23,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582798360] [2021-08-30 17:39:23,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:39:23,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:23,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:39:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:39:23,970 INFO L87 Difference]: Start difference. First operand 365 states and 371 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-30 17:39:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:24,060 INFO L93 Difference]: Finished difference Result 541 states and 550 transitions. [2021-08-30 17:39:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 17:39:24,060 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 346 [2021-08-30 17:39:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:24,062 INFO L225 Difference]: With dead ends: 541 [2021-08-30 17:39:24,062 INFO L226 Difference]: Without dead ends: 541 [2021-08-30 17:39:24,062 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 691 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 121.53ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-30 17:39:24,063 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 53.69ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:24,063 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 136 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 43 Unchecked, 53.69ms Time] [2021-08-30 17:39:24,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-08-30 17:39:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 539. [2021-08-30 17:39:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 526 states have (on average 1.020912547528517) internal successors, (537), 528 states have internal predecessors, (537), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:39:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 548 transitions. [2021-08-30 17:39:24,070 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 548 transitions. Word has length 346 [2021-08-30 17:39:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:24,070 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 548 transitions. [2021-08-30 17:39:24,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-30 17:39:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 548 transitions. [2021-08-30 17:39:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-08-30 17:39:24,078 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:24,079 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:24,101 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 17:39:24,293 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 17:39:24,293 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:24,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:24,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1737659326, now seen corresponding path program 2 times [2021-08-30 17:39:24,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:24,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094015534] [2021-08-30 17:39:24,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:24,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:39:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10221 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10214 trivial. 0 not checked. [2021-08-30 17:39:24,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:24,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094015534] [2021-08-30 17:39:24,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094015534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:24,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791718959] [2021-08-30 17:39:24,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:24,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:24,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:24,434 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 17:39:24,464 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 17:39:24,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:39:24,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:24,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:24,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:24,517 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:39:24,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-30 17:39:24,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-30 17:39:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10221 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10221 trivial. 0 not checked. [2021-08-30 17:39:25,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:39:25,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791718959] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:25,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:39:25,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-08-30 17:39:25,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125385630] [2021-08-30 17:39:25,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:39:25,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:39:25,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:39:25,784 INFO L87 Difference]: Start difference. First operand 539 states and 548 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:25,793 INFO L93 Difference]: Finished difference Result 539 states and 547 transitions. [2021-08-30 17:39:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:39:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 352 [2021-08-30 17:39:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:25,795 INFO L225 Difference]: With dead ends: 539 [2021-08-30 17:39:25,795 INFO L226 Difference]: Without dead ends: 539 [2021-08-30 17:39:25,795 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 351 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 44.98ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:39:25,796 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 5.41ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:25,796 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 43 Unknown, 0 Unchecked, 0.15ms Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 32 Unchecked, 5.41ms Time] [2021-08-30 17:39:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-30 17:39:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-08-30 17:39:25,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 526 states have (on average 1.0190114068441065) internal successors, (536), 528 states have internal predecessors, (536), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:39:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 547 transitions. [2021-08-30 17:39:25,804 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 547 transitions. Word has length 352 [2021-08-30 17:39:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:25,805 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 547 transitions. [2021-08-30 17:39:25,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 547 transitions. [2021-08-30 17:39:25,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-08-30 17:39:25,807 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:25,807 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:25,829 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 17:39:26,020 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 17:39:26,021 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:26,021 INFO L82 PathProgramCache]: Analyzing trace with hash 631838886, now seen corresponding path program 1 times [2021-08-30 17:39:26,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:26,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551446150] [2021-08-30 17:39:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:26,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:39:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10221 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:39:26,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:26,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551446150] [2021-08-30 17:39:26,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551446150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:26,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888432619] [2021-08-30 17:39:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:26,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:26,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:26,165 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:26,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-30 17:39:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 17:39:26,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10221 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:39:26,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10221 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10213 trivial. 0 not checked. [2021-08-30 17:39:27,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888432619] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:27,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:27,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2021-08-30 17:39:27,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893150756] [2021-08-30 17:39:27,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 17:39:27,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:27,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 17:39:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:39:27,087 INFO L87 Difference]: Start difference. First operand 539 states and 547 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:39:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:27,232 INFO L93 Difference]: Finished difference Result 593 states and 600 transitions. [2021-08-30 17:39:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:39:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 355 [2021-08-30 17:39:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:27,235 INFO L225 Difference]: With dead ends: 593 [2021-08-30 17:39:27,235 INFO L226 Difference]: Without dead ends: 593 [2021-08-30 17:39:27,235 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 712 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 23.09ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:39:27,236 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 90 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.90ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:27,236 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 31 Invalid, 242 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [29 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 133.90ms Time] [2021-08-30 17:39:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-08-30 17:39:27,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 570. [2021-08-30 17:39:27,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 555 states have (on average 1.0342342342342343) internal successors, (574), 557 states have internal predecessors, (574), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-30 17:39:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 589 transitions. [2021-08-30 17:39:27,244 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 589 transitions. Word has length 355 [2021-08-30 17:39:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:27,245 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 589 transitions. [2021-08-30 17:39:27,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:39:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 589 transitions. [2021-08-30 17:39:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2021-08-30 17:39:27,256 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:27,256 INFO L513 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:27,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:27,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-30 17:39:27,473 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:27,473 INFO L82 PathProgramCache]: Analyzing trace with hash 179136785, now seen corresponding path program 3 times [2021-08-30 17:39:27,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:27,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635520314] [2021-08-30 17:39:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:27,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:27,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:27,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:27,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:39:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:27,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-08-30 17:39:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:27,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2021-08-30 17:39:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 41212 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 41182 trivial. 0 not checked. [2021-08-30 17:39:27,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:27,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635520314] [2021-08-30 17:39:27,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635520314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:27,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790649667] [2021-08-30 17:39:27,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 17:39:27,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:27,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:27,812 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:27,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-30 17:39:27,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-30 17:39:27,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:27,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-30 17:39:27,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:27,909 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 17:39:27,909 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 17:39:27,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-30 17:39:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 41212 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 41196 trivial. 0 not checked. [2021-08-30 17:39:30,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 41212 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41196 trivial. 0 not checked. [2021-08-30 17:39:31,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790649667] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:31,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:31,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2021-08-30 17:39:31,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36436863] [2021-08-30 17:39:31,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-30 17:39:31,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-30 17:39:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-30 17:39:31,818 INFO L87 Difference]: Start difference. First operand 570 states and 589 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-30 17:39:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:32,067 INFO L93 Difference]: Finished difference Result 570 states and 587 transitions. [2021-08-30 17:39:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 17:39:32,067 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 688 [2021-08-30 17:39:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:32,069 INFO L225 Difference]: With dead ends: 570 [2021-08-30 17:39:32,070 INFO L226 Difference]: Without dead ends: 570 [2021-08-30 17:39:32,070 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 1408 GetRequests, 1374 SyntacticMatches, 11 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 374.26ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-08-30 17:39:32,070 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 89 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 96.44ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:32,070 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 26 Invalid, 290 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [22 Valid, 200 Invalid, 0 Unknown, 68 Unchecked, 96.44ms Time] [2021-08-30 17:39:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-08-30 17:39:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 569. [2021-08-30 17:39:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 555 states have (on average 1.0288288288288288) internal successors, (571), 556 states have internal predecessors, (571), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-30 17:39:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 586 transitions. [2021-08-30 17:39:32,077 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 586 transitions. Word has length 688 [2021-08-30 17:39:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:32,078 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 586 transitions. [2021-08-30 17:39:32,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-30 17:39:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 586 transitions. [2021-08-30 17:39:32,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1040 [2021-08-30 17:39:32,085 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:32,085 INFO L513 BasicCegarLoop]: trace histogram [192, 192, 192, 192, 192, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:32,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:32,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-30 17:39:32,293 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash -15837658, now seen corresponding path program 2 times [2021-08-30 17:39:32,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:32,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865152743] [2021-08-30 17:39:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:32,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:39:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-08-30 17:39:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2021-08-30 17:39:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 691 [2021-08-30 17:39:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 862 [2021-08-30 17:39:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 93003 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 92907 trivial. 0 not checked. [2021-08-30 17:39:32,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:32,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865152743] [2021-08-30 17:39:32,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865152743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:32,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717449390] [2021-08-30 17:39:32,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:32,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:32,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:32,689 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:32,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-30 17:39:32,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:39:32,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:32,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:32,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:32,827 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:32,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:34,671 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:34,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:36,525 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:36,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:38,292 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:38,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:40,033 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:40,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:41,722 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:41,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 93003 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 93003 trivial. 0 not checked. [2021-08-30 17:39:43,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:39:43,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717449390] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:43,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:39:43,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-08-30 17:39:43,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314028614] [2021-08-30 17:39:43,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:39:43,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:39:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:39:43,502 INFO L87 Difference]: Start difference. First operand 569 states and 586 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:43,520 INFO L93 Difference]: Finished difference Result 570 states and 586 transitions. [2021-08-30 17:39:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:39:43,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1039 [2021-08-30 17:39:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:43,523 INFO L225 Difference]: With dead ends: 570 [2021-08-30 17:39:43,523 INFO L226 Difference]: Without dead ends: 568 [2021-08-30 17:39:43,523 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 1061 GetRequests, 1038 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 135.67ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:39:43,524 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.23ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 12.55ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:43,524 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 9 Invalid, 60 Unknown, 0 Unchecked, 0.23ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 38 Unchecked, 12.55ms Time] [2021-08-30 17:39:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-08-30 17:39:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-08-30 17:39:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 554 states have (on average 1.0180505415162455) internal successors, (564), 555 states have internal predecessors, (564), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-30 17:39:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 579 transitions. [2021-08-30 17:39:43,532 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 579 transitions. Word has length 1039 [2021-08-30 17:39:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:43,532 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 579 transitions. [2021-08-30 17:39:43,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 579 transitions. [2021-08-30 17:39:43,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1041 [2021-08-30 17:39:43,541 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:43,542 INFO L513 BasicCegarLoop]: trace histogram [192, 192, 192, 192, 192, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:43,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:43,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:43,759 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:43,759 INFO L82 PathProgramCache]: Analyzing trace with hash -490875611, now seen corresponding path program 1 times [2021-08-30 17:39:43,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:43,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670259794] [2021-08-30 17:39:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:43,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:43,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:43,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:44,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:39:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:44,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-08-30 17:39:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:44,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2021-08-30 17:39:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:44,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 691 [2021-08-30 17:39:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:44,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 862 [2021-08-30 17:39:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 93005 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 92909 trivial. 0 not checked. [2021-08-30 17:39:44,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:44,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670259794] [2021-08-30 17:39:44,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670259794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:44,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887167311] [2021-08-30 17:39:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:44,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:44,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:44,118 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:44,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-30 17:39:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:44,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:44,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 93005 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 92909 trivial. 0 not checked. [2021-08-30 17:39:45,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 93005 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 92909 trivial. 0 not checked. [2021-08-30 17:39:46,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887167311] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:46,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:46,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2021-08-30 17:39:46,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389940994] [2021-08-30 17:39:46,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-30 17:39:46,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:46,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-30 17:39:46,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-08-30 17:39:46,681 INFO L87 Difference]: Start difference. First operand 568 states and 579 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-08-30 17:39:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:46,889 INFO L93 Difference]: Finished difference Result 660 states and 675 transitions. [2021-08-30 17:39:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 17:39:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 1040 [2021-08-30 17:39:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:46,892 INFO L225 Difference]: With dead ends: 660 [2021-08-30 17:39:46,893 INFO L226 Difference]: Without dead ends: 660 [2021-08-30 17:39:46,893 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2102 GetRequests, 2086 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 76.86ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-08-30 17:39:46,893 INFO L928 BasicCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.81ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:46,893 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 39 Invalid, 379 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [81 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 192.81ms Time] [2021-08-30 17:39:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-08-30 17:39:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 648. [2021-08-30 17:39:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 626 states have (on average 1.0287539936102237) internal successors, (644), 627 states have internal predecessors, (644), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-08-30 17:39:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 675 transitions. [2021-08-30 17:39:46,903 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 675 transitions. Word has length 1040 [2021-08-30 17:39:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:46,904 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 675 transitions. [2021-08-30 17:39:46,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-08-30 17:39:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 675 transitions. [2021-08-30 17:39:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2409 [2021-08-30 17:39:46,952 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:46,952 INFO L513 BasicCegarLoop]: trace histogram [448, 448, 448, 448, 448, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:46,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:47,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:47,155 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1946516005, now seen corresponding path program 2 times [2021-08-30 17:39:47,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:47,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250500174] [2021-08-30 17:39:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:47,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:47,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:47,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:47,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:39:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:47,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-08-30 17:39:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:47,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2021-08-30 17:39:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:47,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 691 [2021-08-30 17:39:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:47,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 862 [2021-08-30 17:39:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:47,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1033 [2021-08-30 17:39:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:47,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1204 [2021-08-30 17:39:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:47,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1375 [2021-08-30 17:39:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:48,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1546 [2021-08-30 17:39:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:48,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1717 [2021-08-30 17:39:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:48,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1888 [2021-08-30 17:39:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:48,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2059 [2021-08-30 17:39:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:48,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2230 [2021-08-30 17:39:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 507929 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 507369 trivial. 0 not checked. [2021-08-30 17:39:48,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:48,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250500174] [2021-08-30 17:39:48,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250500174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:48,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212016133] [2021-08-30 17:39:48,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:48,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:48,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:48,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:48,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-30 17:39:48,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:39:48,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:48,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 5898 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-30 17:39:48,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 507929 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 507369 trivial. 0 not checked. [2021-08-30 17:39:51,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 507929 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 507369 trivial. 0 not checked. [2021-08-30 17:39:53,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212016133] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:53,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:53,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2021-08-30 17:39:53,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127350077] [2021-08-30 17:39:53,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-30 17:39:53,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-30 17:39:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-08-30 17:39:53,890 INFO L87 Difference]: Start difference. First operand 648 states and 675 transitions. Second operand has 34 states, 34 states have (on average 4.9411764705882355) internal successors, (168), 33 states have internal predecessors, (168), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-08-30 17:39:54,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:54,336 INFO L93 Difference]: Finished difference Result 836 states and 867 transitions. [2021-08-30 17:39:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-30 17:39:54,336 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.9411764705882355) internal successors, (168), 33 states have internal predecessors, (168), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 2408 [2021-08-30 17:39:54,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:54,343 INFO L225 Difference]: With dead ends: 836 [2021-08-30 17:39:54,343 INFO L226 Difference]: Without dead ends: 836 [2021-08-30 17:39:54,343 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4862 GetRequests, 4830 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 276.66ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-08-30 17:39:54,344 INFO L928 BasicCegarLoop]: 34 mSDtfsCounter, 484 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 302.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.49ms SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 393.56ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:54,344 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 55 Invalid, 736 Unknown, 0 Unchecked, 4.49ms Time], IncrementalHoareTripleChecker [185 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 393.56ms Time] [2021-08-30 17:39:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-08-30 17:39:54,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 808. [2021-08-30 17:39:54,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 770 states have (on average 1.044155844155844) internal successors, (804), 771 states have internal predecessors, (804), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-08-30 17:39:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 867 transitions. [2021-08-30 17:39:54,362 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 867 transitions. Word has length 2408 [2021-08-30 17:39:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:54,363 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 867 transitions. [2021-08-30 17:39:54,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.9411764705882355) internal successors, (168), 33 states have internal predecessors, (168), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-08-30 17:39:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 867 transitions. [2021-08-30 17:39:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5145 [2021-08-30 17:39:54,515 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:54,516 INFO L513 BasicCegarLoop]: trace histogram [960, 960, 960, 960, 960, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:54,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:54,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:54,717 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:54,718 INFO L82 PathProgramCache]: Analyzing trace with hash -685784027, now seen corresponding path program 3 times [2021-08-30 17:39:54,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:54,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010002971] [2021-08-30 17:39:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:54,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:39:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-08-30 17:39:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2021-08-30 17:39:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 691 [2021-08-30 17:39:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 862 [2021-08-30 17:39:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1033 [2021-08-30 17:39:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1204 [2021-08-30 17:39:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1375 [2021-08-30 17:39:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:56,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1546 [2021-08-30 17:39:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1717 [2021-08-30 17:39:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1888 [2021-08-30 17:39:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2059 [2021-08-30 17:39:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2230 [2021-08-30 17:39:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2401 [2021-08-30 17:39:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2572 [2021-08-30 17:39:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2743 [2021-08-30 17:39:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2914 [2021-08-30 17:39:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3085 [2021-08-30 17:39:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3256 [2021-08-30 17:39:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3427 [2021-08-30 17:39:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3598 [2021-08-30 17:39:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3769 [2021-08-30 17:39:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3940 [2021-08-30 17:39:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4111 [2021-08-30 17:39:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4282 [2021-08-30 17:39:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4453 [2021-08-30 17:39:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4624 [2021-08-30 17:39:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4795 [2021-08-30 17:39:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4966 [2021-08-30 17:39:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2335217 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 2332577 trivial. 0 not checked. [2021-08-30 17:39:57,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:57,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010002971] [2021-08-30 17:39:57,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010002971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:57,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339036975] [2021-08-30 17:39:57,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 17:39:57,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:57,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:57,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:57,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-30 17:39:57,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-30 17:39:57,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:57,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 17:39:57,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:40:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2335217 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 2335127 trivial. 0 not checked. [2021-08-30 17:40:03,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:40:03,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-30 17:40:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2335217 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 2335127 trivial. 0 not checked. [2021-08-30 17:40:08,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339036975] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:40:08,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:40:08,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 7, 7] total 46 [2021-08-30 17:40:08,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535021574] [2021-08-30 17:40:08,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-30 17:40:08,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:40:08,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-30 17:40:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=1354, Unknown=0, NotChecked=0, Total=2070 [2021-08-30 17:40:08,585 INFO L87 Difference]: Start difference. First operand 808 states and 867 transitions. Second operand has 46 states, 46 states have (on average 4.434782608695652) internal successors, (204), 45 states have internal predecessors, (204), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-08-30 17:40:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:40:10,152 INFO L93 Difference]: Finished difference Result 834 states and 870 transitions. [2021-08-30 17:40:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-30 17:40:10,153 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.434782608695652) internal successors, (204), 45 states have internal predecessors, (204), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 5144 [2021-08-30 17:40:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:40:10,159 INFO L225 Difference]: With dead ends: 834 [2021-08-30 17:40:10,159 INFO L226 Difference]: Without dead ends: 834 [2021-08-30 17:40:10,161 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10415 GetRequests, 10338 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 1346.09ms TimeCoverageRelationStatistics Valid=2133, Invalid=4029, Unknown=0, NotChecked=0, Total=6162 [2021-08-30 17:40:10,161 INFO L928 BasicCegarLoop]: 38 mSDtfsCounter, 1441 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 479.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.08ms SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 606.88ms IncrementalHoareTripleChecker+Time [2021-08-30 17:40:10,161 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 84 Invalid, 1318 Unknown, 0 Unchecked, 6.08ms Time], IncrementalHoareTripleChecker [612 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 606.88ms Time] [2021-08-30 17:40:10,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-08-30 17:40:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 823. [2021-08-30 17:40:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 784 states have (on average 1.0089285714285714) internal successors, (791), 785 states have internal predecessors, (791), 33 states have call successors, (33), 5 states have call predecessors, (33), 4 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-08-30 17:40:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 856 transitions. [2021-08-30 17:40:10,178 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 856 transitions. Word has length 5144 [2021-08-30 17:40:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:40:10,180 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 856 transitions. [2021-08-30 17:40:10,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.434782608695652) internal successors, (204), 45 states have internal predecessors, (204), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-08-30 17:40:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 856 transitions. [2021-08-30 17:40:10,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5437 [2021-08-30 17:40:10,337 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:40:10,338 INFO L513 BasicCegarLoop]: trace histogram [992, 992, 992, 992, 992, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:40:10,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-30 17:40:10,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-30 17:40:10,543 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:40:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:40:10,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2089333565, now seen corresponding path program 1 times [2021-08-30 17:40:10,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:40:10,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813799301] [2021-08-30 17:40:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:40:10,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:40:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:40:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:40:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:40:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-08-30 17:40:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2021-08-30 17:40:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 691 [2021-08-30 17:40:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 862 [2021-08-30 17:40:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1033 [2021-08-30 17:40:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1204 [2021-08-30 17:40:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1375 [2021-08-30 17:40:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1546 [2021-08-30 17:40:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1717 [2021-08-30 17:40:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1888 [2021-08-30 17:40:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2059 [2021-08-30 17:40:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2230 [2021-08-30 17:40:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2401 [2021-08-30 17:40:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:12,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2572 [2021-08-30 17:40:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2743 [2021-08-30 17:40:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2914 [2021-08-30 17:40:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3085 [2021-08-30 17:40:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3256 [2021-08-30 17:40:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3427 [2021-08-30 17:40:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3598 [2021-08-30 17:40:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3769 [2021-08-30 17:40:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3940 [2021-08-30 17:40:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4111 [2021-08-30 17:40:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4282 [2021-08-30 17:40:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4453 [2021-08-30 17:40:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4624 [2021-08-30 17:40:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4795 [2021-08-30 17:40:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4966 [2021-08-30 17:40:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5137 [2021-08-30 17:40:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2495469 backedges. 0 proven. 2821 refuted. 0 times theorem prover too weak. 2492648 trivial. 0 not checked. [2021-08-30 17:40:13,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:40:13,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813799301] [2021-08-30 17:40:13,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813799301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:40:13,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966742070] [2021-08-30 17:40:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:40:13,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:40:13,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:40:13,349 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:40:13,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-30 17:40:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:14,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 13320 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-30 17:40:14,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:40:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2495469 backedges. 0 proven. 2821 refuted. 0 times theorem prover too weak. 2492648 trivial. 0 not checked. [2021-08-30 17:40:20,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:40:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2495469 backedges. 0 proven. 2821 refuted. 0 times theorem prover too weak. 2492648 trivial. 0 not checked. [2021-08-30 17:40:26,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966742070] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:40:26,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:40:26,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 36 [2021-08-30 17:40:26,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071690504] [2021-08-30 17:40:26,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-30 17:40:26,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:40:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-30 17:40:26,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 17:40:26,134 INFO L87 Difference]: Start difference. First operand 823 states and 856 transitions. Second operand has 36 states, 36 states have (on average 5.083333333333333) internal successors, (183), 35 states have internal predecessors, (183), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-08-30 17:40:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:40:26,507 INFO L93 Difference]: Finished difference Result 829 states and 862 transitions. [2021-08-30 17:40:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-30 17:40:26,507 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.083333333333333) internal successors, (183), 35 states have internal predecessors, (183), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 5436 [2021-08-30 17:40:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:40:26,513 INFO L225 Difference]: With dead ends: 829 [2021-08-30 17:40:26,513 INFO L226 Difference]: Without dead ends: 829 [2021-08-30 17:40:26,514 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10969 GetRequests, 10934 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 324.26ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 17:40:26,514 INFO L928 BasicCegarLoop]: 36 mSDtfsCounter, 450 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 268.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.79ms SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 332.15ms IncrementalHoareTripleChecker+Time [2021-08-30 17:40:26,514 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 45 Invalid, 670 Unknown, 0 Unchecked, 2.79ms Time], IncrementalHoareTripleChecker [173 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 332.15ms Time] [2021-08-30 17:40:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-08-30 17:40:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2021-08-30 17:40:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 789 states have (on average 1.0076045627376427) internal successors, (795), 790 states have internal predecessors, (795), 34 states have call successors, (34), 5 states have call predecessors, (34), 4 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-08-30 17:40:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 862 transitions. [2021-08-30 17:40:26,532 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 862 transitions. Word has length 5436 [2021-08-30 17:40:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:40:26,535 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 862 transitions. [2021-08-30 17:40:26,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.083333333333333) internal successors, (183), 35 states have internal predecessors, (183), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-08-30 17:40:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 862 transitions. [2021-08-30 17:40:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5611 [2021-08-30 17:40:26,708 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:40:26,709 INFO L513 BasicCegarLoop]: trace histogram [1024, 1024, 1024, 1024, 1024, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:40:26,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-30 17:40:26,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:40:26,917 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:40:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:40:26,918 INFO L82 PathProgramCache]: Analyzing trace with hash 285598562, now seen corresponding path program 4 times [2021-08-30 17:40:26,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:40:26,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109461715] [2021-08-30 17:40:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:40:26,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:40:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:40:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:40:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:40:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-08-30 17:40:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2021-08-30 17:40:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 691 [2021-08-30 17:40:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 862 [2021-08-30 17:40:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1033 [2021-08-30 17:40:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1204 [2021-08-30 17:40:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1375 [2021-08-30 17:40:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1546 [2021-08-30 17:40:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1717 [2021-08-30 17:40:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1888 [2021-08-30 17:40:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2059 [2021-08-30 17:40:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2230 [2021-08-30 17:40:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2401 [2021-08-30 17:40:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2572 [2021-08-30 17:40:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2743 [2021-08-30 17:40:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2914 [2021-08-30 17:40:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3085 [2021-08-30 17:40:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3256 [2021-08-30 17:40:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3427 [2021-08-30 17:40:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3598 [2021-08-30 17:40:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3769 [2021-08-30 17:40:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3940 [2021-08-30 17:40:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4111 [2021-08-30 17:40:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4282 [2021-08-30 17:40:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4453 [2021-08-30 17:40:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4624 [2021-08-30 17:40:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4795 [2021-08-30 17:40:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:29,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4966 [2021-08-30 17:40:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:30,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5137 [2021-08-30 17:40:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:30,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5308 [2021-08-30 17:40:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:40:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2659184 backedges. 1923 proven. 125 refuted. 0 times theorem prover too weak. 2657136 trivial. 0 not checked. [2021-08-30 17:40:30,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:40:30,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109461715] [2021-08-30 17:40:30,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109461715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:40:30,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678547205] [2021-08-30 17:40:30,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 17:40:30,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:40:30,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:40:30,073 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:40:30,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-30 17:42:56,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 17:42:56,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:42:56,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 13745 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-30 17:42:56,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:43:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2659184 backedges. 2048 proven. 0 refuted. 0 times theorem prover too weak. 2657136 trivial. 0 not checked. [2021-08-30 17:43:02,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:43:02,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678547205] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:43:02,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:43:02,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [36] total 37 [2021-08-30 17:43:02,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713891043] [2021-08-30 17:43:02,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-30 17:43:02,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:43:02,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-30 17:43:02,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2021-08-30 17:43:02,466 INFO L87 Difference]: Start difference. First operand 829 states and 862 transitions. Second operand has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:43:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:43:03,028 INFO L93 Difference]: Finished difference Result 827 states and 858 transitions. [2021-08-30 17:43:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-30 17:43:03,028 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 5610 [2021-08-30 17:43:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:43:03,034 INFO L225 Difference]: With dead ends: 827 [2021-08-30 17:43:03,034 INFO L226 Difference]: Without dead ends: 827 [2021-08-30 17:43:03,034 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5710 GetRequests, 5675 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 327.83ms TimeCoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2021-08-30 17:43:03,035 INFO L928 BasicCegarLoop]: 67 mSDtfsCounter, 136 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 400.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.39ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 514.56ms IncrementalHoareTripleChecker+Time [2021-08-30 17:43:03,035 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 242 Invalid, 1519 Unknown, 0 Unchecked, 3.39ms Time], IncrementalHoareTripleChecker [89 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 514.56ms Time] [2021-08-30 17:43:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-08-30 17:43:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-08-30 17:43:03,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 788 states have (on average 1.0038071065989849) internal successors, (791), 788 states have internal predecessors, (791), 34 states have call successors, (34), 5 states have call predecessors, (34), 4 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-08-30 17:43:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 858 transitions. [2021-08-30 17:43:03,046 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 858 transitions. Word has length 5610 [2021-08-30 17:43:03,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:43:03,047 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 858 transitions. [2021-08-30 17:43:03,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:43:03,048 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 858 transitions. [2021-08-30 17:43:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5612 [2021-08-30 17:43:03,213 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:43:03,215 INFO L513 BasicCegarLoop]: trace histogram [1024, 1024, 1024, 1024, 1024, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:43:03,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-30 17:43:03,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:43:03,421 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:43:03,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:43:03,422 INFO L82 PathProgramCache]: Analyzing trace with hash 263619352, now seen corresponding path program 2 times [2021-08-30 17:43:03,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:43:03,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654982895] [2021-08-30 17:43:03,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:43:03,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:43:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:05,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:43:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:05,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:43:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:05,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-08-30 17:43:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:05,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-08-30 17:43:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:05,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2021-08-30 17:43:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:05,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 691 [2021-08-30 17:43:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 862 [2021-08-30 17:43:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1033 [2021-08-30 17:43:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1204 [2021-08-30 17:43:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1375 [2021-08-30 17:43:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1546 [2021-08-30 17:43:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1717 [2021-08-30 17:43:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1888 [2021-08-30 17:43:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2059 [2021-08-30 17:43:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2230 [2021-08-30 17:43:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2401 [2021-08-30 17:43:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2572 [2021-08-30 17:43:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2743 [2021-08-30 17:43:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2914 [2021-08-30 17:43:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3085 [2021-08-30 17:43:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3256 [2021-08-30 17:43:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3427 [2021-08-30 17:43:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3598 [2021-08-30 17:43:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3769 [2021-08-30 17:43:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3940 [2021-08-30 17:43:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4111 [2021-08-30 17:43:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4282 [2021-08-30 17:43:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4453 [2021-08-30 17:43:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4624 [2021-08-30 17:43:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4795 [2021-08-30 17:43:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4966 [2021-08-30 17:43:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5137 [2021-08-30 17:43:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5308 [2021-08-30 17:43:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:43:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2659152 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2659152 trivial. 0 not checked. [2021-08-30 17:43:06,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:43:06,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654982895] [2021-08-30 17:43:06,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654982895] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:43:06,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:43:06,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 17:43:06,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698925413] [2021-08-30 17:43:06,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:43:06,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:43:06,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:43:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:43:06,641 INFO L87 Difference]: Start difference. First operand 827 states and 858 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:43:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:43:06,677 INFO L93 Difference]: Finished difference Result 826 states and 857 transitions. [2021-08-30 17:43:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:43:06,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 5611 [2021-08-30 17:43:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:43:06,679 INFO L225 Difference]: With dead ends: 826 [2021-08-30 17:43:06,679 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 17:43:06,680 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.43ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:43:06,680 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.34ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.33ms IncrementalHoareTripleChecker+Time [2021-08-30 17:43:06,680 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 7 Invalid, 77 Unknown, 0 Unchecked, 0.34ms Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 31.33ms Time] [2021-08-30 17:43:06,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 17:43:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 17:43:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-30 17:43:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 17:43:06,681 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5611 [2021-08-30 17:43:06,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:43:06,682 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 17:43:06,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:43:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 17:43:06,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 17:43:06,684 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2021-08-30 17:43:06,684 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr1REQUIRES_VIOLATION (6 of 8 remaining) [2021-08-30 17:43:06,684 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr2REQUIRES_VIOLATION (5 of 8 remaining) [2021-08-30 17:43:06,684 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (4 of 8 remaining) [2021-08-30 17:43:06,684 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (3 of 8 remaining) [2021-08-30 17:43:06,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (2 of 8 remaining) [2021-08-30 17:43:06,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (1 of 8 remaining) [2021-08-30 17:43:06,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-08-30 17:43:06,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-30 17:43:06,688 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 17:43:06,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 05:43:06 BoogieIcfgContainer [2021-08-30 17:43:06,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 17:43:06,690 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 17:43:06,690 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 17:43:06,690 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 17:43:06,690 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:39:08" (3/4) ... [2021-08-30 17:43:06,692 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 17:43:06,696 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 17:43:06,696 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-08-30 17:43:06,696 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 17:43:06,698 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-08-30 17:43:06,698 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-30 17:43:06,699 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-08-30 17:43:06,699 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 17:43:06,719 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 17:43:06,719 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 17:43:06,720 INFO L158 Benchmark]: Toolchain (without parser) took 239008.04ms. Allocated memory was 52.4MB in the beginning and 1.1GB in the end (delta: 1.1GB). Free memory was 29.8MB in the beginning and 712.5MB in the end (delta: -682.7MB). Peak memory consumption was 372.0MB. Max. memory is 16.1GB. [2021-08-30 17:43:06,720 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 52.4MB. Free memory is still 33.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:43:06,720 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.36ms. Allocated memory is still 52.4MB. Free memory was 29.6MB in the beginning and 32.1MB in the end (delta: -2.4MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-08-30 17:43:06,720 INFO L158 Benchmark]: Boogie Preprocessor took 60.67ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 32.1MB in the beginning and 46.5MB in the end (delta: -14.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:43:06,722 INFO L158 Benchmark]: RCFGBuilder took 217.37ms. Allocated memory is still 62.9MB. Free memory was 46.5MB in the beginning and 37.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-30 17:43:06,723 INFO L158 Benchmark]: TraceAbstraction took 238517.56ms. Allocated memory was 62.9MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 36.7MB in the beginning and 714.6MB in the end (delta: -677.9MB). Peak memory consumption was 368.4MB. Max. memory is 16.1GB. [2021-08-30 17:43:06,723 INFO L158 Benchmark]: Witness Printer took 29.63ms. Allocated memory is still 1.1GB. Free memory was 714.6MB in the beginning and 712.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:43:06,723 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 52.4MB. Free memory is still 33.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 176.36ms. Allocated memory is still 52.4MB. Free memory was 29.6MB in the beginning and 32.1MB in the end (delta: -2.4MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.67ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 32.1MB in the beginning and 46.5MB in the end (delta: -14.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 217.37ms. Allocated memory is still 62.9MB. Free memory was 46.5MB in the beginning and 37.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 238517.56ms. Allocated memory was 62.9MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 36.7MB in the beginning and 714.6MB in the end (delta: -677.9MB). Peak memory consumption was 368.4MB. Max. memory is 16.1GB. * Witness Printer took 29.63ms. Allocated memory is still 1.1GB. Free memory was 714.6MB in the beginning and 712.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 238481.55ms, OverallIterations: 25, TraceHistogramMax: 1024, EmptinessCheckTime: 750.00ms, AutomataDifference: 7708.82ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 5.94ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4299 SdHoareTripleChecker+Valid, 3963.64ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4252 mSDsluCounter, 868 SdHoareTripleChecker+Invalid, 3149.41ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 229 IncrementalHoareTripleChecker+Unchecked, 2348 mSDsCounter, 1507 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6904 IncrementalHoareTripleChecker+Invalid, 8640 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1507 mSolverCounterUnsat, 298 mSDtfsCounter, 6904 mSolverCounterSat, 55.05ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 39548 GetRequests, 38960 SyntacticMatches, 32 SemanticMatches, 556 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4687 ImplicationChecksByTransitivity, 7734.77ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=829occurred in iteration=23, InterpolantAutomatonStates: 356, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 205.57ms AutomataMinimizationTime, 25 MinimizatonAttempts, 151 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1433.86ms SsaConstructionTime, 155120.67ms SatisfiabilityAnalysisTime, 68618.47ms InterpolantComputationTime, 51562 NumberOfCodeBlocks, 44348 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 67342 ConstructedInterpolants, 2421 QuantifiedInterpolants, 117508 SizeOfPredicates, 26 NumberOfNonLiveVariables, 38964 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 56 InterpolantComputations, 12 PerfectInterpolantSequences, 24656886/24679733 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-30 17:43:06,749 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...