./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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/ArraysOfVariableLength.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 17:38:35,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 17:38:35,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 17:38:35,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 17:38:35,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 17:38:35,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 17:38:35,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 17:38:35,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 17:38:35,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 17:38:35,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 17:38:35,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 17:38:35,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 17:38:35,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 17:38:35,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 17:38:35,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 17:38:35,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 17:38:35,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 17:38:35,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 17:38:35,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 17:38:35,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 17:38:35,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 17:38:35,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 17:38:35,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 17:38:35,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 17:38:35,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 17:38:35,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 17:38:35,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 17:38:35,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 17:38:35,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 17:38:35,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 17:38:35,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 17:38:35,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 17:38:35,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 17:38:35,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 17:38:35,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 17:38:35,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 17:38:35,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 17:38:35,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 17:38:35,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 17:38:35,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 17:38:35,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 17:38:35,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 17:38:35,125 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 17:38:35,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 17:38:35,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 17:38:35,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 17:38:35,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 17:38:35,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 17:38:35,127 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 17:38:35,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 17:38:35,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 17:38:35,128 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 17:38:35,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 17:38:35,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 17:38:35,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 17:38:35,128 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 17:38:35,128 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 17:38:35,136 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 17:38:35,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 17:38:35,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 17:38:35,136 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 17:38:35,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 17:38:35,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 17:38:35,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 17:38:35,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 17:38:35,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:38:35,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 17:38:35,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 17:38:35,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 17:38:35,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 17:38:35,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 17:38:35,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 [2021-08-30 17:38:35,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 17:38:35,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 17:38:35,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 17:38:35,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 17:38:35,440 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 17:38:35,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2021-08-30 17:38:35,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51d7089b3/6e7964194edd444b8a11ad81c9439fdd/FLAGf59b3f95d [2021-08-30 17:38:35,911 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 17:38:35,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2021-08-30 17:38:35,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51d7089b3/6e7964194edd444b8a11ad81c9439fdd/FLAGf59b3f95d [2021-08-30 17:38:35,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51d7089b3/6e7964194edd444b8a11ad81c9439fdd [2021-08-30 17:38:35,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 17:38:35,943 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 17:38:35,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 17:38:35,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 17:38:35,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 17:38:35,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:38:35" (1/1) ... [2021-08-30 17:38:35,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b1505fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:35, skipping insertion in model container [2021-08-30 17:38:35,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:38:35" (1/1) ... [2021-08-30 17:38:35,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 17:38:35,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 17:38:36,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:38:36,117 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 17:38:36,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:38:36,143 INFO L208 MainTranslator]: Completed translation [2021-08-30 17:38:36,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:36 WrapperNode [2021-08-30 17:38:36,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 17:38:36,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 17:38:36,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 17:38:36,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 17:38:36,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:36" (1/1) ... [2021-08-30 17:38:36,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:36" (1/1) ... [2021-08-30 17:38:36,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:36" (1/1) ... [2021-08-30 17:38:36,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:36" (1/1) ... [2021-08-30 17:38:36,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:36" (1/1) ... [2021-08-30 17:38:36,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:36" (1/1) ... [2021-08-30 17:38:36,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:36" (1/1) ... [2021-08-30 17:38:36,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 17:38:36,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 17:38:36,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 17:38:36,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 17:38:36,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:36" (1/1) ... [2021-08-30 17:38:36,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:38:36,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:36,249 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 17:38:36,275 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 17:38:36,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 17:38:36,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 17:38:36,297 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-30 17:38:36,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 17:38:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-30 17:38:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 17:38:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 17:38:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 17:38:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 17:38:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 17:38:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 17:38:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 17:38:36,463 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 17:38:36,465 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-30 17:38:36,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:38:36 BoogieIcfgContainer [2021-08-30 17:38:36,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 17:38:36,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 17:38:36,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 17:38:36,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 17:38:36,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:38:35" (1/3) ... [2021-08-30 17:38:36,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3596d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:38:36, skipping insertion in model container [2021-08-30 17:38:36,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:36" (2/3) ... [2021-08-30 17:38:36,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3596d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:38:36, skipping insertion in model container [2021-08-30 17:38:36,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:38:36" (3/3) ... [2021-08-30 17:38:36,475 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2021-08-30 17:38:36,479 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 17:38:36,479 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-08-30 17:38:36,524 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 17:38:36,530 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 17:38:36,532 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-30 17:38:36,545 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 17:38:36,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:38:36,551 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:36,551 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:36,552 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 17:38:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:36,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-08-30 17:38:36,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:36,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39219890] [2021-08-30 17:38:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:36,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:36,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:36,717 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 17:38:36,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:36,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39219890] [2021-08-30 17:38:36,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39219890] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:36,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:38:36,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 17:38:36,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087871272] [2021-08-30 17:38:36,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:38:36,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:36,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:38:36,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:38:36,744 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 17:38:36,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:36,890 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-08-30 17:38:36,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:38:36,892 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 17:38:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:36,898 INFO L225 Difference]: With dead ends: 58 [2021-08-30 17:38:36,898 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 17:38:36,899 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.04ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:38:36,902 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.25ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.42ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:36,903 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 14 Invalid, 106 Unknown, 0 Unchecked, 2.25ms Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 113.42ms Time] [2021-08-30 17:38:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 17:38:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-08-30 17:38:36,934 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 17:38:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-30 17:38:36,935 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-08-30 17:38:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:36,936 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-30 17:38:36,936 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 17:38:36,936 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-30 17:38:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 17:38:36,937 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:36,937 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:36,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 17:38:36,938 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 17:38:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:36,938 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-08-30 17:38:36,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:36,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250247450] [2021-08-30 17:38:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:36,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,018 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 17:38:37,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:37,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250247450] [2021-08-30 17:38:37,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250247450] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:37,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:38:37,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:38:37,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100446700] [2021-08-30 17:38:37,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:38:37,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:38:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:38:37,021 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:38:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:37,243 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-08-30 17:38:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:38:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 17:38:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:37,245 INFO L225 Difference]: With dead ends: 59 [2021-08-30 17:38:37,246 INFO L226 Difference]: Without dead ends: 59 [2021-08-30 17:38:37,247 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.72ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:38:37,248 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.60ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 164.76ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:37,252 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 20 Invalid, 171 Unknown, 0 Unchecked, 13.60ms Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 164.76ms Time] [2021-08-30 17:38:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-30 17:38:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2021-08-30 17:38:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 38 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:38:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-08-30 17:38:37,262 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2021-08-30 17:38:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:37,263 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-08-30 17:38:37,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:38:37,264 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-08-30 17:38:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:38:37,265 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:37,265 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:37,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 17:38:37,265 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-08-30 17:38:37,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:37,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720315487] [2021-08-30 17:38:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:37,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,367 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 17:38:37,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:37,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720315487] [2021-08-30 17:38:37,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720315487] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:37,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:38:37,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:38:37,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070456625] [2021-08-30 17:38:37,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:38:37,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:37,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:38:37,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:38:37,370 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:38:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:37,428 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-08-30 17:38:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:38:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-08-30 17:38:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:37,433 INFO L225 Difference]: With dead ends: 43 [2021-08-30 17:38:37,433 INFO L226 Difference]: Without dead ends: 43 [2021-08-30 17:38:37,434 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.53ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:38:37,441 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.03ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:37,443 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 8 Invalid, 77 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 53.03ms Time] [2021-08-30 17:38:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-30 17:38:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-30 17:38:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.3) internal successors, (39), 36 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:38:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-08-30 17:38:37,453 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2021-08-30 17:38:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:37,453 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-08-30 17:38:37,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:38:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-08-30 17:38:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:38:37,454 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:37,454 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:37,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 17:38:37,454 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash 143250927, now seen corresponding path program 1 times [2021-08-30 17:38:37,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:37,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460564637] [2021-08-30 17:38:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:37,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,530 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 17:38:37,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:37,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460564637] [2021-08-30 17:38:37,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460564637] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:37,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:38:37,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:38:37,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544360910] [2021-08-30 17:38:37,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:38:37,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:37,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:38:37,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:38:37,533 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:38:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:37,593 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-08-30 17:38:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:38:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-08-30 17:38:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:37,594 INFO L225 Difference]: With dead ends: 47 [2021-08-30 17:38:37,594 INFO L226 Difference]: Without dead ends: 47 [2021-08-30 17:38:37,594 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.11ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:38:37,595 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.49ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:37,595 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 11 Invalid, 92 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 55.49ms Time] [2021-08-30 17:38:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-30 17:38:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-08-30 17:38:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:38:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-08-30 17:38:37,600 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2021-08-30 17:38:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:37,600 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-08-30 17:38:37,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:38:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-08-30 17:38:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 17:38:37,601 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:37,601 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, 1] [2021-08-30 17:38:37,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 17:38:37,602 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:37,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:37,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1902162976, now seen corresponding path program 1 times [2021-08-30 17:38:37,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:37,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243228949] [2021-08-30 17:38:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:37,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,646 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 17:38:37,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:37,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243228949] [2021-08-30 17:38:37,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243228949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:37,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104363238] [2021-08-30 17:38:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:37,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:37,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:37,649 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 17:38:37,672 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 17:38:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:37,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 17:38:37,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:37,833 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 17:38:37,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:37,916 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 17:38:37,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104363238] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:37,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:38:37,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-08-30 17:38:37,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986233842] [2021-08-30 17:38:37,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:38:37,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:37,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:38:37,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:38:37,920 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:38:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:38,045 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-08-30 17:38:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:38:38,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2021-08-30 17:38:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:38,046 INFO L225 Difference]: With dead ends: 88 [2021-08-30 17:38:38,046 INFO L226 Difference]: Without dead ends: 88 [2021-08-30 17:38:38,047 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.17ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:38:38,047 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 88 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.80ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.94ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:38,048 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 17 Invalid, 163 Unknown, 0 Unchecked, 4.80ms Time], IncrementalHoareTripleChecker [23 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 99.94ms Time] [2021-08-30 17:38:38,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-30 17:38:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-08-30 17:38:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 62 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:38:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-08-30 17:38:38,054 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 21 [2021-08-30 17:38:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:38,054 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-08-30 17:38:38,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:38:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-08-30 17:38:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 17:38:38,055 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:38,055 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:38,079 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 17:38:38,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:38,273 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 17:38:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:38,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1165178250, now seen corresponding path program 1 times [2021-08-30 17:38:38,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:38,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827273560] [2021-08-30 17:38:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:38,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:38,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:38,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:38,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:38,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827273560] [2021-08-30 17:38:38,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827273560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:38,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827128307] [2021-08-30 17:38:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:38,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:38,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:38,348 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 17:38:38,349 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 17:38:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 17:38:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:38,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:38:38,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827128307] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:38,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:38:38,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-08-30 17:38:38,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716305412] [2021-08-30 17:38:38,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:38:38,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:38,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:38:38,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:38:38,490 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:38:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:38,615 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-08-30 17:38:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:38:38,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-08-30 17:38:38,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:38,618 INFO L225 Difference]: With dead ends: 86 [2021-08-30 17:38:38,618 INFO L226 Difference]: Without dead ends: 86 [2021-08-30 17:38:38,619 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.43ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:38:38,622 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.10ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.79ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:38,622 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 26 Invalid, 195 Unknown, 0 Unchecked, 3.10ms Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 106.79ms Time] [2021-08-30 17:38:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-30 17:38:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2021-08-30 17:38:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.305084745762712) internal successors, (77), 64 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:38:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-08-30 17:38:38,645 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 22 [2021-08-30 17:38:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:38,645 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-08-30 17:38:38,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:38:38,646 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-08-30 17:38:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 17:38:38,646 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:38,647 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:38,673 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 17:38:38,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-30 17:38:38,869 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:38,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787427, now seen corresponding path program 1 times [2021-08-30 17:38:38,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:38,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671037694] [2021-08-30 17:38:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:38,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:38,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:38,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:38,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:38,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671037694] [2021-08-30 17:38:38,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671037694] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:38,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:38:38,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:38:38,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804018367] [2021-08-30 17:38:38,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:38:38,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:38,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:38:38,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:38:38,947 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:38:39,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:39,029 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-08-30 17:38:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:38:39,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-08-30 17:38:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:39,033 INFO L225 Difference]: With dead ends: 73 [2021-08-30 17:38:39,033 INFO L226 Difference]: Without dead ends: 73 [2021-08-30 17:38:39,033 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.76ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:38:39,034 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.51ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:39,034 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 14 Invalid, 120 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 61.51ms Time] [2021-08-30 17:38:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-30 17:38:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-08-30 17:38:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 63 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:38:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-08-30 17:38:39,051 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 23 [2021-08-30 17:38:39,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:39,052 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-08-30 17:38:39,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:38:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-08-30 17:38:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 17:38:39,053 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:39,053 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:39,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 17:38:39,054 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:39,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787428, now seen corresponding path program 1 times [2021-08-30 17:38:39,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:39,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64276746] [2021-08-30 17:38:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:39,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-30 17:38:39,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:39,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64276746] [2021-08-30 17:38:39,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64276746] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:39,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:38:39,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:38:39,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724077327] [2021-08-30 17:38:39,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:38:39,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:38:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:38:39,136 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:38:39,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:39,233 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2021-08-30 17:38:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:38:39,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-08-30 17:38:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:39,234 INFO L225 Difference]: With dead ends: 79 [2021-08-30 17:38:39,234 INFO L226 Difference]: Without dead ends: 79 [2021-08-30 17:38:39,235 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.69ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:38:39,235 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 51 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.00ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:39,236 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 14 Invalid, 131 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [4 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 72.00ms Time] [2021-08-30 17:38:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-30 17:38:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-08-30 17:38:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 64 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:38:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-08-30 17:38:39,248 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 23 [2021-08-30 17:38:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:39,250 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-08-30 17:38:39,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:38:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-08-30 17:38:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 17:38:39,251 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:39,251 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:39,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 17:38:39,252 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:39,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1134972881, now seen corresponding path program 1 times [2021-08-30 17:38:39,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:39,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575376723] [2021-08-30 17:38:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:39,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 17:38:39,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:39,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575376723] [2021-08-30 17:38:39,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575376723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:39,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160762251] [2021-08-30 17:38:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:39,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:39,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:39,358 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 17:38:39,359 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 17:38:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 17:38:39,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:38:39,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:38:39,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160762251] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:39,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:38:39,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2021-08-30 17:38:39,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686227509] [2021-08-30 17:38:39,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:38:39,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:39,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:38:39,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:38:39,487 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:38:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:39,578 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-08-30 17:38:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:38:39,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-08-30 17:38:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:39,579 INFO L225 Difference]: With dead ends: 83 [2021-08-30 17:38:39,579 INFO L226 Difference]: Without dead ends: 80 [2021-08-30 17:38:39,580 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 48.27ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:38:39,582 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.19ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:39,582 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 172 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 78.19ms Time] [2021-08-30 17:38:39,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-30 17:38:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-08-30 17:38:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 64 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:38:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2021-08-30 17:38:39,587 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 26 [2021-08-30 17:38:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:39,587 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2021-08-30 17:38:39,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:38:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2021-08-30 17:38:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 17:38:39,589 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:39,590 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:39,614 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 17:38:39,804 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 17:38:39,805 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:39,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1992931931, now seen corresponding path program 1 times [2021-08-30 17:38:39,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:39,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003785383] [2021-08-30 17:38:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:39,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:39,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:39,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003785383] [2021-08-30 17:38:39,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003785383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:39,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391648975] [2021-08-30 17:38:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:39,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:39,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:39,880 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 17:38:39,909 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 17:38:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 17:38:39,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:40,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:40,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391648975] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:40,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:38:40,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2021-08-30 17:38:40,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391453305] [2021-08-30 17:38:40,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:38:40,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:40,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:38:40,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:38:40,091 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:38:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:40,304 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2021-08-30 17:38:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 17:38:40,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-08-30 17:38:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:40,305 INFO L225 Difference]: With dead ends: 93 [2021-08-30 17:38:40,305 INFO L226 Difference]: Without dead ends: 93 [2021-08-30 17:38:40,306 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 110.22ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-30 17:38:40,306 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.07ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:40,307 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 35 Invalid, 285 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [14 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 144.07ms Time] [2021-08-30 17:38:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-30 17:38:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2021-08-30 17:38:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 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 17:38:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2021-08-30 17:38:40,313 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 27 [2021-08-30 17:38:40,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:40,313 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2021-08-30 17:38:40,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:38:40,314 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2021-08-30 17:38:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-30 17:38:40,318 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:40,319 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:40,347 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 17:38:40,541 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 17:38:40,542 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 17:38:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:40,542 INFO L82 PathProgramCache]: Analyzing trace with hash -790766996, now seen corresponding path program 1 times [2021-08-30 17:38:40,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:40,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393379784] [2021-08-30 17:38:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:40,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:40,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:40,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:40,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:38:40,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:40,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393379784] [2021-08-30 17:38:40,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393379784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:40,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010064792] [2021-08-30 17:38:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:40,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:40,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:40,617 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 17:38:40,632 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 17:38:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:38:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:40,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:38:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:38:40,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:38:40,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010064792] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:40,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:38:40,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 8 [2021-08-30 17:38:40,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397151600] [2021-08-30 17:38:40,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:38:40,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:40,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:38:40,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:38:40,976 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-30 17:38:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:41,104 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-08-30 17:38:41,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:38:41,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 31 [2021-08-30 17:38:41,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:41,105 INFO L225 Difference]: With dead ends: 87 [2021-08-30 17:38:41,105 INFO L226 Difference]: Without dead ends: 87 [2021-08-30 17:38:41,105 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 88.81ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:38:41,105 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.08ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 97.70ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:41,106 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 32 Invalid, 210 Unknown, 0 Unchecked, 2.08ms Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 45 Unchecked, 97.70ms Time] [2021-08-30 17:38:41,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-30 17:38:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-08-30 17:38:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 75 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:38:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2021-08-30 17:38:41,108 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 31 [2021-08-30 17:38:41,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:41,108 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2021-08-30 17:38:41,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-30 17:38:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2021-08-30 17:38:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-30 17:38:41,109 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:41,109 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:41,131 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 17:38:41,324 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 17:38:41,325 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:41,325 INFO L82 PathProgramCache]: Analyzing trace with hash -174164318, now seen corresponding path program 2 times [2021-08-30 17:38:41,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:41,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517418551] [2021-08-30 17:38:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:41,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:41,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:41,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:41,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:38:41,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:41,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517418551] [2021-08-30 17:38:41,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517418551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:41,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119345649] [2021-08-30 17:38:41,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:38:41,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:41,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:41,413 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 17:38:41,435 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 17:38:41,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:38:41,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:38:41,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:38:41,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-30 17:38:41,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-30 17:38:41,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119345649] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:41,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:38:41,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 15 [2021-08-30 17:38:41,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460763583] [2021-08-30 17:38:41,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-30 17:38:41,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:41,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-30 17:38:41,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:38:41,817 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 17:38:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:42,239 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-08-30 17:38:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 17:38:42,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2021-08-30 17:38:42,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:42,241 INFO L225 Difference]: With dead ends: 100 [2021-08-30 17:38:42,241 INFO L226 Difference]: Without dead ends: 100 [2021-08-30 17:38:42,241 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 229.01ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-08-30 17:38:42,241 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 101 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 231.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 296.64ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:42,242 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 55 Invalid, 688 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [16 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 296.64ms Time] [2021-08-30 17:38:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-30 17:38:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2021-08-30 17:38:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 74 states have internal predecessors, (84), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:38:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2021-08-30 17:38:42,245 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 43 [2021-08-30 17:38:42,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:42,245 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2021-08-30 17:38:42,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 17:38:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2021-08-30 17:38:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-30 17:38:42,246 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:42,246 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:42,272 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 17:38:42,456 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 17:38:42,457 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1104126516, now seen corresponding path program 1 times [2021-08-30 17:38:42,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:42,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204524528] [2021-08-30 17:38:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:42,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:42,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:42,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:42,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-30 17:38:42,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:42,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204524528] [2021-08-30 17:38:42,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204524528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:42,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404995401] [2021-08-30 17:38:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:42,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:42,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:42,569 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 17:38:42,584 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 17:38:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-30 17:38:42,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:42,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:38:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-30 17:38:42,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-30 17:38:43,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404995401] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:43,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:38:43,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 13 [2021-08-30 17:38:43,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466180488] [2021-08-30 17:38:43,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-30 17:38:43,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-30 17:38:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:38:43,097 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 17:38:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:43,321 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2021-08-30 17:38:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:38:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2021-08-30 17:38:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:43,323 INFO L225 Difference]: With dead ends: 110 [2021-08-30 17:38:43,323 INFO L226 Difference]: Without dead ends: 110 [2021-08-30 17:38:43,323 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 177.52ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-08-30 17:38:43,324 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 168 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 143.30ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:43,324 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 26 Invalid, 275 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [19 Valid, 248 Invalid, 0 Unknown, 8 Unchecked, 143.30ms Time] [2021-08-30 17:38:43,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-30 17:38:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-08-30 17:38:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 86 states have (on average 1.186046511627907) internal successors, (102), 89 states have internal predecessors, (102), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:38:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2021-08-30 17:38:43,328 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 44 [2021-08-30 17:38:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:43,328 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2021-08-30 17:38:43,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 11 states have internal predecessors, (55), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 17:38:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2021-08-30 17:38:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-30 17:38:43,329 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:43,329 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:43,353 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 17:38:43,529 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 17:38:43,530 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:43,530 INFO L82 PathProgramCache]: Analyzing trace with hash 620179745, now seen corresponding path program 2 times [2021-08-30 17:38:43,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:43,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813566240] [2021-08-30 17:38:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:43,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:43,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:43,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:43,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 35 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-30 17:38:43,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:43,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813566240] [2021-08-30 17:38:43,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813566240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:43,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624083758] [2021-08-30 17:38:43,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:38:43,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:43,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:43,653 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 17:38:43,654 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 17:38:43,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:38:43,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:38:43,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-30 17:38:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:43,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:38:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-08-30 17:38:44,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-08-30 17:38:44,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624083758] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:44,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:38:44,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2021-08-30 17:38:44,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879185754] [2021-08-30 17:38:44,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-30 17:38:44,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:44,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-30 17:38:44,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-30 17:38:44,747 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 22 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:38:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:45,137 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2021-08-30 17:38:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-30 17:38:45,137 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 59 [2021-08-30 17:38:45,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:45,139 INFO L225 Difference]: With dead ends: 135 [2021-08-30 17:38:45,139 INFO L226 Difference]: Without dead ends: 135 [2021-08-30 17:38:45,139 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 449.51ms TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2021-08-30 17:38:45,140 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 209 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.19ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 198.22ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:45,140 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 26 Invalid, 371 Unknown, 0 Unchecked, 2.19ms Time], IncrementalHoareTripleChecker [37 Valid, 306 Invalid, 0 Unknown, 28 Unchecked, 198.22ms Time] [2021-08-30 17:38:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-30 17:38:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 93. [2021-08-30 17:38:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 80 states have internal predecessors, (90), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:38:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2021-08-30 17:38:45,144 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 59 [2021-08-30 17:38:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:45,144 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2021-08-30 17:38:45,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:38:45,145 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2021-08-30 17:38:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-30 17:38:45,145 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:45,145 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:45,169 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 17:38:45,352 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 17:38:45,353 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:45,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2125667663, now seen corresponding path program 1 times [2021-08-30 17:38:45,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:45,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036406885] [2021-08-30 17:38:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:45,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:45,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:45,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:45,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:45,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:38:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:45,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-08-30 17:38:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 62 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-30 17:38:45,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:45,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036406885] [2021-08-30 17:38:45,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036406885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:45,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427579303] [2021-08-30 17:38:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:45,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:45,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:45,497 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 17:38:45,498 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 17:38:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:45,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:38:45,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 17:38:45,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 51 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-08-30 17:38:45,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427579303] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:45,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:38:45,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 17 [2021-08-30 17:38:45,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845410042] [2021-08-30 17:38:45,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-30 17:38:45,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:45,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-30 17:38:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-30 17:38:45,949 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-08-30 17:38:46,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:46,389 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-08-30 17:38:46,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 17:38:46,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 72 [2021-08-30 17:38:46,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:46,390 INFO L225 Difference]: With dead ends: 124 [2021-08-30 17:38:46,390 INFO L226 Difference]: Without dead ends: 118 [2021-08-30 17:38:46,392 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 266.96ms TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-08-30 17:38:46,393 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 114 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.78ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 289.32ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:46,393 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 46 Invalid, 627 Unknown, 0 Unchecked, 2.78ms Time], IncrementalHoareTripleChecker [18 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 289.32ms Time] [2021-08-30 17:38:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-30 17:38:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2021-08-30 17:38:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 90 states have internal predecessors, (100), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:38:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2021-08-30 17:38:46,396 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 72 [2021-08-30 17:38:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:46,396 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2021-08-30 17:38:46,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 16 states have internal predecessors, (85), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-08-30 17:38:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2021-08-30 17:38:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-30 17:38:46,397 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:46,397 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:46,422 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 17:38:46,621 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 17:38:46,622 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:46,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:46,622 INFO L82 PathProgramCache]: Analyzing trace with hash 267240299, now seen corresponding path program 2 times [2021-08-30 17:38:46,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:46,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074963063] [2021-08-30 17:38:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:46,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:46,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:46,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:46,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:46,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:38:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:46,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:38:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-30 17:38:46,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:46,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074963063] [2021-08-30 17:38:46,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074963063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:46,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273248077] [2021-08-30 17:38:46,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:38:46,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:46,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:46,717 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 17:38:46,746 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 17:38:46,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:38:46,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:38:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 17:38:46,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:46,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-08-30 17:38:46,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-08-30 17:38:46,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-08-30 17:38:47,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-08-30 17:38:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-08-30 17:38:47,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:38:47,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273248077] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:47,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:38:47,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-08-30 17:38:47,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367120322] [2021-08-30 17:38:47,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:38:47,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:47,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:38:47,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:38:47,154 INFO L87 Difference]: Start difference. First operand 103 states and 113 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 17:38:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:47,184 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2021-08-30 17:38:47,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:38:47,184 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 82 [2021-08-30 17:38:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:47,185 INFO L225 Difference]: With dead ends: 103 [2021-08-30 17:38:47,185 INFO L226 Difference]: Without dead ends: 99 [2021-08-30 17:38:47,185 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 90.66ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:38:47,186 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.31ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 21.58ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:47,186 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 87 Unknown, 0 Unchecked, 0.31ms Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 37 Unchecked, 21.58ms Time] [2021-08-30 17:38:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-30 17:38:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2021-08-30 17:38:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 75 states have internal predecessors, (79), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:38:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-08-30 17:38:47,189 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 82 [2021-08-30 17:38:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:47,190 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-08-30 17:38:47,190 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 17:38:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-08-30 17:38:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-30 17:38:47,191 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:47,191 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:47,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-30 17:38:47,404 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 17:38:47,405 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:47,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash -305393536, now seen corresponding path program 1 times [2021-08-30 17:38:47,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:47,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993064248] [2021-08-30 17:38:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:47,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:47,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:47,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:47,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:47,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:38:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:47,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:38:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-08-30 17:38:47,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:47,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993064248] [2021-08-30 17:38:47,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993064248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:47,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406885539] [2021-08-30 17:38:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:47,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:47,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:47,496 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 17:38:47,497 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 17:38:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:47,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 17:38:47,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 91 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-08-30 17:38:47,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 91 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-08-30 17:38:47,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406885539] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:47,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:38:47,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2021-08-30 17:38:47,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832738227] [2021-08-30 17:38:47,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-30 17:38:47,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-30 17:38:47,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-30 17:38:47,990 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 18 states have internal predecessors, (88), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-30 17:38:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:48,404 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2021-08-30 17:38:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 17:38:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 18 states have internal predecessors, (88), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 83 [2021-08-30 17:38:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:48,405 INFO L225 Difference]: With dead ends: 143 [2021-08-30 17:38:48,405 INFO L226 Difference]: Without dead ends: 140 [2021-08-30 17:38:48,405 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 232.96ms TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2021-08-30 17:38:48,406 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 217 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 217.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.05ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 277.93ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:48,407 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 77 Invalid, 637 Unknown, 0 Unchecked, 3.05ms Time], IncrementalHoareTripleChecker [54 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 277.93ms Time] [2021-08-30 17:38:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-30 17:38:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2021-08-30 17:38:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 83 states have internal predecessors, (87), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:38:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-08-30 17:38:48,410 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 83 [2021-08-30 17:38:48,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:48,411 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-08-30 17:38:48,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 18 states have internal predecessors, (88), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-30 17:38:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-08-30 17:38:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-08-30 17:38:48,412 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:48,412 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:48,436 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 17:38:48,634 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 17:38:48,635 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 17:38:48,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:48,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1252904754, now seen corresponding path program 2 times [2021-08-30 17:38:48,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:48,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318745057] [2021-08-30 17:38:48,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:48,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:48,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:48,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:48,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:48,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:38:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:48,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:38:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:48,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:38:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 156 proven. 38 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-08-30 17:38:48,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:48,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318745057] [2021-08-30 17:38:48,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318745057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:48,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919956076] [2021-08-30 17:38:48,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:38:48,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:48,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:48,837 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 17:38:48,838 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 17:38:48,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:38:48,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:38:48,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-30 17:38:48,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 176 proven. 18 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-08-30 17:38:49,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 176 proven. 18 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-08-30 17:38:49,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919956076] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:49,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:38:49,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 24 [2021-08-30 17:38:49,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59417872] [2021-08-30 17:38:49,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-30 17:38:49,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:49,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-30 17:38:49,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-30 17:38:49,545 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 23 states have internal predecessors, (97), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-08-30 17:38:50,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:50,059 INFO L93 Difference]: Finished difference Result 145 states and 152 transitions. [2021-08-30 17:38:50,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-30 17:38:50,059 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 23 states have internal predecessors, (97), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 104 [2021-08-30 17:38:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:50,060 INFO L225 Difference]: With dead ends: 145 [2021-08-30 17:38:50,060 INFO L226 Difference]: Without dead ends: 145 [2021-08-30 17:38:50,061 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 416.55ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-08-30 17:38:50,061 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 184 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 230.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.75ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 297.89ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:50,061 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 66 Invalid, 764 Unknown, 0 Unchecked, 2.75ms Time], IncrementalHoareTripleChecker [34 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 297.89ms Time] [2021-08-30 17:38:50,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-30 17:38:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 104. [2021-08-30 17:38:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 91 states have internal predecessors, (95), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-30 17:38:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-08-30 17:38:50,065 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 104 [2021-08-30 17:38:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:50,066 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-08-30 17:38:50,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 23 states have internal predecessors, (97), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-08-30 17:38:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-08-30 17:38:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-08-30 17:38:50,067 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:50,067 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:50,084 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 17:38:50,272 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 17:38:50,273 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:38:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1621618801, now seen corresponding path program 3 times [2021-08-30 17:38:50,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:50,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488397324] [2021-08-30 17:38:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:50,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:50,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:50,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:50,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:50,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:38:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:50,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:38:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:50,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:38:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-08-30 17:38:50,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:50,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488397324] [2021-08-30 17:38:50,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488397324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:50,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19392819] [2021-08-30 17:38:50,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 17:38:50,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:50,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:50,401 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 17:38:50,411 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 17:38:50,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-30 17:38:50,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:38:50,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 17:38:50,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:50,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:38:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 170 proven. 13 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-08-30 17:38:51,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 171 proven. 12 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-08-30 17:38:51,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19392819] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:51,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:38:51,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2021-08-30 17:38:51,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656321010] [2021-08-30 17:38:51,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-30 17:38:51,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:51,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-30 17:38:51,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-08-30 17:38:51,483 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 20 states, 17 states have (on average 5.235294117647059) internal successors, (89), 19 states have internal predecessors, (89), 10 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-08-30 17:38:51,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:51,790 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2021-08-30 17:38:51,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-30 17:38:51,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 5.235294117647059) internal successors, (89), 19 states have internal predecessors, (89), 10 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 109 [2021-08-30 17:38:51,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:51,791 INFO L225 Difference]: With dead ends: 133 [2021-08-30 17:38:51,791 INFO L226 Difference]: Without dead ends: 133 [2021-08-30 17:38:51,791 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 213 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 358.42ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-08-30 17:38:51,792 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 110 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.97ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 195.38ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:51,792 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 33 Invalid, 540 Unknown, 0 Unchecked, 1.97ms Time], IncrementalHoareTripleChecker [61 Valid, 450 Invalid, 0 Unknown, 29 Unchecked, 195.38ms Time] [2021-08-30 17:38:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-30 17:38:51,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2021-08-30 17:38:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 114 states have (on average 1.043859649122807) internal successors, (119), 115 states have internal predecessors, (119), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-08-30 17:38:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2021-08-30 17:38:51,796 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 109 [2021-08-30 17:38:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:51,797 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2021-08-30 17:38:51,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 5.235294117647059) internal successors, (89), 19 states have internal predecessors, (89), 10 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-08-30 17:38:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2021-08-30 17:38:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-08-30 17:38:51,798 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:51,799 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:51,827 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 17:38:52,013 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 17:38:52,013 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 17:38:52,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:52,014 INFO L82 PathProgramCache]: Analyzing trace with hash 96813108, now seen corresponding path program 2 times [2021-08-30 17:38:52,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:52,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455387366] [2021-08-30 17:38:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:52,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:52,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:52,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:52,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:52,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:38:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:52,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:38:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:52,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:38:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:52,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-30 17:38:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2021-08-30 17:38:52,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:52,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455387366] [2021-08-30 17:38:52,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455387366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:52,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958625896] [2021-08-30 17:38:52,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:38:52,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:52,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:52,153 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 17:38:52,154 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 17:38:52,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:38:52,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:38:52,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 17:38:52,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 346 proven. 34 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-08-30 17:38:52,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 346 proven. 34 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-08-30 17:38:53,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958625896] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:53,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:38:53,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 27 [2021-08-30 17:38:53,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414326945] [2021-08-30 17:38:53,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-30 17:38:53,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-30 17:38:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-08-30 17:38:53,149 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 26 states have internal predecessors, (128), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-30 17:38:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:53,700 INFO L93 Difference]: Finished difference Result 221 states and 236 transitions. [2021-08-30 17:38:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-30 17:38:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 26 states have internal predecessors, (128), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 170 [2021-08-30 17:38:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:53,702 INFO L225 Difference]: With dead ends: 221 [2021-08-30 17:38:53,702 INFO L226 Difference]: Without dead ends: 221 [2021-08-30 17:38:53,703 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 335 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 404.85ms TimeCoverageRelationStatistics Valid=357, Invalid=1623, Unknown=0, NotChecked=0, Total=1980 [2021-08-30 17:38:53,703 INFO L928 BasicCegarLoop]: 12 mSDtfsCounter, 353 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 274.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.46ms SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 348.42ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:53,704 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 82 Invalid, 857 Unknown, 0 Unchecked, 4.46ms Time], IncrementalHoareTripleChecker [103 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 348.42ms Time] [2021-08-30 17:38:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-30 17:38:53,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 165. [2021-08-30 17:38:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 148 states have (on average 1.054054054054054) internal successors, (156), 149 states have internal predecessors, (156), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-08-30 17:38:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 174 transitions. [2021-08-30 17:38:53,709 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 174 transitions. Word has length 170 [2021-08-30 17:38:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:53,709 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 174 transitions. [2021-08-30 17:38:53,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 26 states have internal predecessors, (128), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-30 17:38:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 174 transitions. [2021-08-30 17:38:53,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-08-30 17:38:53,711 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:53,712 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:53,733 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 17:38:53,924 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 17:38:53,925 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 17:38:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash 929883340, now seen corresponding path program 3 times [2021-08-30 17:38:53,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:38:53,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265105189] [2021-08-30 17:38:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:53,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:38:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:54,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:38:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:54,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:38:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:54,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:38:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:54,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:38:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:54,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:38:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:54,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:38:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:54,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-30 17:38:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:54,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-08-30 17:38:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1400 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2021-08-30 17:38:54,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:38:54,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265105189] [2021-08-30 17:38:54,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265105189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:38:54,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97724117] [2021-08-30 17:38:54,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 17:38:54,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:38:54,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:38:54,090 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 17:38:54,109 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 17:38:54,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-30 17:38:54,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:38:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 17:38:54,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:54,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:38:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1400 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-08-30 17:38:54,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:38:54,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97724117] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:54,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:38:54,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2021-08-30 17:38:54,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219050931] [2021-08-30 17:38:54,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:38:54,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:38:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:38:54,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:38:54,991 INFO L87 Difference]: Start difference. First operand 165 states and 174 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:38:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:55,019 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2021-08-30 17:38:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:38:55,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 211 [2021-08-30 17:38:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:55,020 INFO L225 Difference]: With dead ends: 164 [2021-08-30 17:38:55,021 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 17:38:55,021 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 209 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 181.98ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:38:55,021 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.38ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 23.60ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:55,022 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 7 Invalid, 55 Unknown, 0 Unchecked, 0.38ms Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 15 Unchecked, 23.60ms Time] [2021-08-30 17:38:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 17:38:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 17:38:55,022 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 17:38:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 17:38:55,023 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2021-08-30 17:38:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:55,023 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 17:38:55,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:38:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 17:38:55,023 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 17:38:55,026 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2021-08-30 17:38:55,026 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr1REQUIRES_VIOLATION (6 of 8 remaining) [2021-08-30 17:38:55,026 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr2REQUIRES_VIOLATION (5 of 8 remaining) [2021-08-30 17:38:55,027 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (4 of 8 remaining) [2021-08-30 17:38:55,027 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (3 of 8 remaining) [2021-08-30 17:38:55,027 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (2 of 8 remaining) [2021-08-30 17:38:55,027 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (1 of 8 remaining) [2021-08-30 17:38:55,027 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-08-30 17:38:55,054 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 17:38:55,232 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 17:38:55,236 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 17:38:55,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 05:38:55 BoogieIcfgContainer [2021-08-30 17:38:55,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 17:38:55,239 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 17:38:55,239 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 17:38:55,239 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 17:38:55,239 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:38:36" (3/4) ... [2021-08-30 17:38:55,241 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 17:38:55,246 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 17:38:55,246 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-08-30 17:38:55,246 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 17:38:55,257 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-08-30 17:38:55,257 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-30 17:38:55,257 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-30 17:38:55,257 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 17:38:55,276 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 17:38:55,276 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 17:38:55,276 INFO L158 Benchmark]: Toolchain (without parser) took 19333.68ms. Allocated memory was 67.1MB in the beginning and 119.5MB in the end (delta: 52.4MB). Free memory was 47.3MB in the beginning and 74.5MB in the end (delta: -27.2MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. [2021-08-30 17:38:55,277 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 48.5MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:38:55,277 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.51ms. Allocated memory is still 67.1MB. Free memory was 47.1MB in the beginning and 38.0MB in the end (delta: 9.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-08-30 17:38:55,277 INFO L158 Benchmark]: Boogie Preprocessor took 76.91ms. Allocated memory is still 67.1MB. Free memory was 38.0MB in the beginning and 49.7MB in the end (delta: -11.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 17:38:55,278 INFO L158 Benchmark]: RCFGBuilder took 243.54ms. Allocated memory is still 67.1MB. Free memory was 49.7MB in the beginning and 40.6MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-30 17:38:55,278 INFO L158 Benchmark]: TraceAbstraction took 18768.85ms. Allocated memory was 67.1MB in the beginning and 119.5MB in the end (delta: 52.4MB). Free memory was 40.1MB in the beginning and 77.5MB in the end (delta: -37.5MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. [2021-08-30 17:38:55,278 INFO L158 Benchmark]: Witness Printer took 37.29ms. Allocated memory is still 119.5MB. Free memory was 77.5MB in the beginning and 74.5MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:38:55,279 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 48.5MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 199.51ms. Allocated memory is still 67.1MB. Free memory was 47.1MB in the beginning and 38.0MB in the end (delta: 9.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 76.91ms. Allocated memory is still 67.1MB. Free memory was 38.0MB in the beginning and 49.7MB in the end (delta: -11.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 243.54ms. Allocated memory is still 67.1MB. Free memory was 49.7MB in the beginning and 40.6MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 18768.85ms. Allocated memory was 67.1MB in the beginning and 119.5MB in the end (delta: 52.4MB). Free memory was 40.1MB in the beginning and 77.5MB in the end (delta: -37.5MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. * Witness Printer took 37.29ms. Allocated memory is still 119.5MB. Free memory was 77.5MB in the beginning and 74.5MB in the end (delta: 3.0MB). 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: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 18713.63ms, OverallIterations: 21, TraceHistogramMax: 20, EmptinessCheckTime: 28.73ms, AutomataDifference: 4811.27ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 10.85ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1960 SdHoareTripleChecker+Valid, 3139.16ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1945 mSDsluCounter, 638 SdHoareTripleChecker+Invalid, 2495.70ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 162 IncrementalHoareTripleChecker+Unchecked, 1530 mSDsCounter, 430 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6031 IncrementalHoareTripleChecker+Invalid, 6623 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 430 mSolverCounterUnsat, 130 mSDtfsCounter, 6031 mSolverCounterSat, 54.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2229 GetRequests, 1866 SyntacticMatches, 48 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 3284.19ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=165occurred in iteration=20, InterpolantAutomatonStates: 212, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 138.52ms AutomataMinimizationTime, 21 MinimizatonAttempts, 315 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 177.57ms SsaConstructionTime, 603.45ms SatisfiabilityAnalysisTime, 9096.20ms InterpolantComputationTime, 2305 NumberOfCodeBlocks, 1925 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 3021 ConstructedInterpolants, 301 QuantifiedInterpolants, 12579 SizeOfPredicates, 30 NumberOfNonLiveVariables, 2476 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 47 InterpolantComputations, 10 PerfectInterpolantSequences, 8176/8826 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 17:38:55,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...