./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.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 32d9f155778c5c4efaa55d37fdad329bb0d271b5 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 06:01:44,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:01:44,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:01:44,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:01:44,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:01:44,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:01:44,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:01:44,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:01:44,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:01:44,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:01:44,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:01:44,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:01:44,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:01:44,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:01:44,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:01:44,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:01:44,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:01:44,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:01:44,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:01:44,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:01:44,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:01:44,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:01:44,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:01:44,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:01:44,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:01:44,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:01:44,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:01:44,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:01:44,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:01:44,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:01:44,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:01:44,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:01:44,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:01:44,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:01:44,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:01:44,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:01:44,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:01:44,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:01:44,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:01:44,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:01:44,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:01:44,388 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 06:01:44,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:01:44,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:01:44,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:01:44,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:01:44,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:01:44,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:01:44,419 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:01:44,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:01:44,419 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:01:44,420 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:01:44,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:01:44,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:01:44,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:01:44,421 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:01:44,421 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:01:44,421 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:01:44,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:01:44,421 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:01:44,427 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:01:44,427 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:01:44,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:01:44,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:01:44,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:01:44,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:01:44,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:01:44,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:01:44,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 06:01:44,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 06:01:44,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:01:44,429 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32d9f155778c5c4efaa55d37fdad329bb0d271b5 [2021-08-27 06:01:44,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:01:44,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:01:44,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:01:44,715 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:01:44,716 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:01:44,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2021-08-27 06:01:44,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40461aaa3/67ccb6c35efc480483ae5b4f2e1b9ca9/FLAG871723509 [2021-08-27 06:01:45,115 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:01:45,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2021-08-27 06:01:45,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40461aaa3/67ccb6c35efc480483ae5b4f2e1b9ca9/FLAG871723509 [2021-08-27 06:01:45,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40461aaa3/67ccb6c35efc480483ae5b4f2e1b9ca9 [2021-08-27 06:01:45,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:01:45,529 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:01:45,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:01:45,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:01:45,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:01:45,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:01:45" (1/1) ... [2021-08-27 06:01:45,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@104be81f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:45, skipping insertion in model container [2021-08-27 06:01:45,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:01:45" (1/1) ... [2021-08-27 06:01:45,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:01:45,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:01:45,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:01:45,636 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:01:45,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:01:45,655 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:01:45,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:45 WrapperNode [2021-08-27 06:01:45,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:01:45,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:01:45,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:01:45,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:01:45,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:45" (1/1) ... [2021-08-27 06:01:45,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:45" (1/1) ... [2021-08-27 06:01:45,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:45" (1/1) ... [2021-08-27 06:01:45,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:45" (1/1) ... [2021-08-27 06:01:45,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:45" (1/1) ... [2021-08-27 06:01:45,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:45" (1/1) ... [2021-08-27 06:01:45,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:45" (1/1) ... [2021-08-27 06:01:45,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:01:45,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:01:45,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:01:45,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:01:45,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:45" (1/1) ... [2021-08-27 06:01:45,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:01:45,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:45,754 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 06:01:45,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 06:01:45,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:01:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:01:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-27 06:01:45,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:01:45,786 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-27 06:01:45,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 06:01:45,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:01:45,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:01:45,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 06:01:45,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:01:45,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:01:45,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:01:45,988 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:01:45,988 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 06:01:45,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:01:45 BoogieIcfgContainer [2021-08-27 06:01:45,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:01:45,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:01:45,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:01:45,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:01:45,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:01:45" (1/3) ... [2021-08-27 06:01:45,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6fdb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:01:45, skipping insertion in model container [2021-08-27 06:01:45,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:01:45" (2/3) ... [2021-08-27 06:01:45,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6fdb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:01:45, skipping insertion in model container [2021-08-27 06:01:45,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:01:45" (3/3) ... [2021-08-27 06:01:45,994 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2021-08-27 06:01:45,997 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:01:45,997 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-08-27 06:01:46,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:01:46,071 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 06:01:46,072 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-27 06:01:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:01:46,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:46,092 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:46,093 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-08-27 06:01:46,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:46,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762924472] [2021-08-27 06:01:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:46,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:46,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:46,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:46,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762924472] [2021-08-27 06:01:46,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762924472] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:46,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:01:46,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:01:46,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913764843] [2021-08-27 06:01:46,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:01:46,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:46,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:01:46,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:01:46,306 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:01:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:46,477 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-08-27 06:01:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:01:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 06:01:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:46,483 INFO L225 Difference]: With dead ends: 58 [2021-08-27 06:01:46,483 INFO L226 Difference]: Without dead ends: 54 [2021-08-27 06:01:46,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:01:46,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-27 06:01:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-08-27 06:01:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 33 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:01:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-27 06:01:46,516 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-08-27 06:01:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:46,516 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-27 06:01:46,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:01:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-27 06:01:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 06:01:46,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:46,517 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:46,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 06:01:46,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:46,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:46,519 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-08-27 06:01:46,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:46,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343048347] [2021-08-27 06:01:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:46,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:46,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:46,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:46,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343048347] [2021-08-27 06:01:46,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343048347] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:46,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:01:46,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:01:46,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881746638] [2021-08-27 06:01:46,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:01:46,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:46,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:01:46,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:01:46,636 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:01:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:46,809 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-08-27 06:01:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:01:46,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 06:01:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:46,811 INFO L225 Difference]: With dead ends: 59 [2021-08-27 06:01:46,811 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 06:01:46,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:01:46,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 06:01:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2021-08-27 06:01:46,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 38 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-08-27 06:01:46,815 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2021-08-27 06:01:46,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:46,816 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-08-27 06:01:46,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:01:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-08-27 06:01:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 06:01:46,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:46,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:46,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 06:01:46,817 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:46,817 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-08-27 06:01:46,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:46,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193751164] [2021-08-27 06:01:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:46,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:46,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:46,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:46,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:46,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193751164] [2021-08-27 06:01:46,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193751164] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:46,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:01:46,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:01:46,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352369381] [2021-08-27 06:01:46,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:01:46,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:46,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:01:46,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:01:46,863 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:01:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:46,904 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-08-27 06:01:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:01:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-08-27 06:01:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:46,906 INFO L225 Difference]: With dead ends: 43 [2021-08-27 06:01:46,906 INFO L226 Difference]: Without dead ends: 43 [2021-08-27 06:01:46,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:01:46,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-27 06:01:46,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-27 06:01:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.3) internal successors, (39), 36 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-08-27 06:01:46,910 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2021-08-27 06:01:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:46,910 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-08-27 06:01:46,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:01:46,910 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-08-27 06:01:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 06:01:46,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:46,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:46,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 06:01:46,911 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:46,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:46,912 INFO L82 PathProgramCache]: Analyzing trace with hash 143250927, now seen corresponding path program 1 times [2021-08-27 06:01:46,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:46,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190811552] [2021-08-27 06:01:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:46,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:46,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:46,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:47,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:47,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190811552] [2021-08-27 06:01:47,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190811552] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:47,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:01:47,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:01:47,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083816454] [2021-08-27 06:01:47,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:01:47,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:01:47,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:01:47,008 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:01:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:47,090 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-08-27 06:01:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:01:47,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-08-27 06:01:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:47,091 INFO L225 Difference]: With dead ends: 47 [2021-08-27 06:01:47,091 INFO L226 Difference]: Without dead ends: 47 [2021-08-27 06:01:47,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:01:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-27 06:01:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-08-27 06:01:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:47,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-08-27 06:01:47,094 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2021-08-27 06:01:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:47,094 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-08-27 06:01:47,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:01:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-08-27 06:01:47,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:01:47,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:47,095 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:47,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 06:01:47,095 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:47,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1902162976, now seen corresponding path program 1 times [2021-08-27 06:01:47,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:47,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950697713] [2021-08-27 06:01:47,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:47,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:47,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:47,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950697713] [2021-08-27 06:01:47,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950697713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:47,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232592568] [2021-08-27 06:01:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:47,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:47,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:47,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:47,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 06:01:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:01:47,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:47,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232592568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:47,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:47,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 06:01:47,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960279759] [2021-08-27 06:01:47,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:01:47,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:47,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:01:47,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:01:47,341 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:47,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:47,448 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-08-27 06:01:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:01:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2021-08-27 06:01:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:47,449 INFO L225 Difference]: With dead ends: 69 [2021-08-27 06:01:47,449 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 06:01:47,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:01:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 06:01:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-08-27 06:01:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 44 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-08-27 06:01:47,452 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 21 [2021-08-27 06:01:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:47,453 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-08-27 06:01:47,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-08-27 06:01:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 06:01:47,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:47,453 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:47,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:47,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:47,675 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:47,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:47,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1165178250, now seen corresponding path program 1 times [2021-08-27 06:01:47,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:47,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693942694] [2021-08-27 06:01:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:47,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 06:01:47,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:47,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693942694] [2021-08-27 06:01:47,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693942694] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:47,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:01:47,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:01:47,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359705069] [2021-08-27 06:01:47,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:01:47,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:47,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:01:47,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:01:47,726 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 06:01:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:47,791 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-08-27 06:01:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:01:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-08-27 06:01:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:47,793 INFO L225 Difference]: With dead ends: 62 [2021-08-27 06:01:47,794 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 06:01:47,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:01:47,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 06:01:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-08-27 06:01:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 46 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-08-27 06:01:47,809 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 22 [2021-08-27 06:01:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:47,810 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-08-27 06:01:47,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 06:01:47,810 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-08-27 06:01:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 06:01:47,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:47,811 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:47,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 06:01:47,811 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:47,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787427, now seen corresponding path program 1 times [2021-08-27 06:01:47,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:47,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103187615] [2021-08-27 06:01:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:47,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:01:47,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:47,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103187615] [2021-08-27 06:01:47,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103187615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:47,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981511199] [2021-08-27 06:01:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:47,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:47,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:47,905 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:47,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 06:01:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:47,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:01:47,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:47,993 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:01:47,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-08-27 06:01:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:01:48,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981511199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:48,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:48,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-27 06:01:48,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007002807] [2021-08-27 06:01:48,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 06:01:48,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 06:01:48,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:01:48,081 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 06:01:48,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:48,166 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-08-27 06:01:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:01:48,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-08-27 06:01:48,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:48,167 INFO L225 Difference]: With dead ends: 53 [2021-08-27 06:01:48,167 INFO L226 Difference]: Without dead ends: 53 [2021-08-27 06:01:48,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:01:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-27 06:01:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-08-27 06:01:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 45 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-08-27 06:01:48,170 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 23 [2021-08-27 06:01:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:48,170 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-08-27 06:01:48,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 06:01:48,170 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-08-27 06:01:48,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 06:01:48,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:48,170 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:48,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:48,381 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,SelfDestructingSolverStorable6 [2021-08-27 06:01:48,381 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:48,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:48,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787428, now seen corresponding path program 1 times [2021-08-27 06:01:48,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:48,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078384899] [2021-08-27 06:01:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:48,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:48,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:48,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:01:48,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:48,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078384899] [2021-08-27 06:01:48,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078384899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:48,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843311562] [2021-08-27 06:01:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:48,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:48,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:48,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:48,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 06:01:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:48,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-27 06:01:48,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:48,564 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 06:01:48,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 06:01:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:01:48,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843311562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:48,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:48,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-27 06:01:48,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100963912] [2021-08-27 06:01:48,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 06:01:48,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:48,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 06:01:48,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:01:48,760 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 06:01:48,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:48,865 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-08-27 06:01:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:01:48,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-08-27 06:01:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:48,866 INFO L225 Difference]: With dead ends: 59 [2021-08-27 06:01:48,866 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 06:01:48,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:01:48,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 06:01:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-08-27 06:01:48,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 46 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-08-27 06:01:48,869 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 23 [2021-08-27 06:01:48,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:48,869 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-08-27 06:01:48,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 06:01:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-08-27 06:01:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 06:01:48,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:48,872 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:48,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:49,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:49,077 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1134972881, now seen corresponding path program 1 times [2021-08-27 06:01:49,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:49,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872393359] [2021-08-27 06:01:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:49,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:49,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:49,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:49,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:01:49,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:49,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872393359] [2021-08-27 06:01:49,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872393359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:49,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354884301] [2021-08-27 06:01:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:49,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:49,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:49,146 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:49,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 06:01:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:49,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 06:01:49,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 06:01:49,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354884301] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:49,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:01:49,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2021-08-27 06:01:49,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975274484] [2021-08-27 06:01:49,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:01:49,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:01:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:01:49,301 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:49,365 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-08-27 06:01:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:01:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-08-27 06:01:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:49,366 INFO L225 Difference]: With dead ends: 63 [2021-08-27 06:01:49,366 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 06:01:49,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:01:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 06:01:49,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-08-27 06:01:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 46 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-08-27 06:01:49,373 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 26 [2021-08-27 06:01:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:49,373 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-08-27 06:01:49,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-08-27 06:01:49,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 06:01:49,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:49,375 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:49,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:49,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:49,594 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1992931931, now seen corresponding path program 1 times [2021-08-27 06:01:49,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:49,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373396712] [2021-08-27 06:01:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:49,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:49,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:49,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:49,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:49,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373396712] [2021-08-27 06:01:49,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373396712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:49,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822025142] [2021-08-27 06:01:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:49,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:49,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:49,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:49,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 06:01:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:49,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:01:49,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:01:49,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822025142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:49,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:49,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-27 06:01:49,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88255453] [2021-08-27 06:01:49,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 06:01:49,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:49,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 06:01:49,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:01:49,859 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:50,074 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2021-08-27 06:01:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:01:50,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-08-27 06:01:50,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:50,075 INFO L225 Difference]: With dead ends: 81 [2021-08-27 06:01:50,075 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 06:01:50,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:01:50,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 06:01:50,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-08-27 06:01:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.196078431372549) internal successors, (61), 56 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:50,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-08-27 06:01:50,078 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 27 [2021-08-27 06:01:50,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:50,078 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-08-27 06:01:50,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 06:01:50,078 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-08-27 06:01:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 06:01:50,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:50,079 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:50,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-27 06:01:50,284 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,SelfDestructingSolverStorable9 [2021-08-27 06:01:50,285 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash -790766996, now seen corresponding path program 1 times [2021-08-27 06:01:50,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:50,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858057124] [2021-08-27 06:01:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:50,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:50,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:50,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:50,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 06:01:50,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:50,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858057124] [2021-08-27 06:01:50,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858057124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:50,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206068854] [2021-08-27 06:01:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:50,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:50,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:50,414 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:50,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 06:01:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:50,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 06:01:50,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:50,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-27 06:01:50,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-08-27 06:01:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 06:01:50,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206068854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:50,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:50,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-27 06:01:50,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787981095] [2021-08-27 06:01:50,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 06:01:50,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:50,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 06:01:50,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:01:50,932 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:51,043 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-08-27 06:01:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:01:51,044 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 31 [2021-08-27 06:01:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:51,044 INFO L225 Difference]: With dead ends: 69 [2021-08-27 06:01:51,044 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 06:01:51,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:01:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 06:01:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-08-27 06:01:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 57 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-08-27 06:01:51,046 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 31 [2021-08-27 06:01:51,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:51,046 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-08-27 06:01:51,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-08-27 06:01:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 06:01:51,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:51,047 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:51,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:51,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:51,265 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash 894123677, now seen corresponding path program 1 times [2021-08-27 06:01:51,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:51,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692349484] [2021-08-27 06:01:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:51,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:51,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:51,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-27 06:01:51,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:51,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692349484] [2021-08-27 06:01:51,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692349484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:51,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326880685] [2021-08-27 06:01:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:51,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:51,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:51,363 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:51,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 06:01:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:51,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 06:01:51,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 06:01:51,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326880685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:51,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:51,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-27 06:01:51,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145668865] [2021-08-27 06:01:51,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 06:01:51,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:51,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 06:01:51,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:01:51,597 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:51,714 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-08-27 06:01:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:01:51,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2021-08-27 06:01:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:51,715 INFO L225 Difference]: With dead ends: 94 [2021-08-27 06:01:51,715 INFO L226 Difference]: Without dead ends: 94 [2021-08-27 06:01:51,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:01:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-27 06:01:51,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-08-27 06:01:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 64 states have internal predecessors, (71), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-08-27 06:01:51,717 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 37 [2021-08-27 06:01:51,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:51,717 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-08-27 06:01:51,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:51,718 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-08-27 06:01:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 06:01:51,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:51,718 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:51,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:51,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:51,929 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:51,929 INFO L82 PathProgramCache]: Analyzing trace with hash -174164318, now seen corresponding path program 2 times [2021-08-27 06:01:51,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:51,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361205577] [2021-08-27 06:01:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:51,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:51,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:51,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:51,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-27 06:01:51,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:51,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361205577] [2021-08-27 06:01:51,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361205577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:51,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183511702] [2021-08-27 06:01:51,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:01:51,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:51,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:51,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:51,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 06:01:52,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:01:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:01:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 06:01:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 06:01:52,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183511702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:52,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:52,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2021-08-27 06:01:52,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487622113] [2021-08-27 06:01:52,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 06:01:52,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:52,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 06:01:52,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:01:52,301 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 06:01:52,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:52,530 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2021-08-27 06:01:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 06:01:52,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2021-08-27 06:01:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:52,531 INFO L225 Difference]: With dead ends: 124 [2021-08-27 06:01:52,531 INFO L226 Difference]: Without dead ends: 124 [2021-08-27 06:01:52,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-27 06:01:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-27 06:01:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 91. [2021-08-27 06:01:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 80 states have internal predecessors, (89), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-08-27 06:01:52,535 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 43 [2021-08-27 06:01:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:52,535 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-08-27 06:01:52,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 06:01:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-08-27 06:01:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 06:01:52,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:52,536 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:52,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:52,750 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,SelfDestructingSolverStorable12 [2021-08-27 06:01:52,751 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:52,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1104126516, now seen corresponding path program 1 times [2021-08-27 06:01:52,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:52,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156559826] [2021-08-27 06:01:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:52,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:52,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:52,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:52,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-27 06:01:52,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:52,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156559826] [2021-08-27 06:01:52,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156559826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:52,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001836495] [2021-08-27 06:01:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:52,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:52,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:52,838 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:52,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 06:01:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:52,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-27 06:01:52,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:53,017 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 06:01:53,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 06:01:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-27 06:01:53,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001836495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:53,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:53,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-08-27 06:01:53,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357428640] [2021-08-27 06:01:53,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 06:01:53,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:53,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 06:01:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:01:53,303 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 12 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 06:01:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:53,498 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2021-08-27 06:01:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 06:01:53,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2021-08-27 06:01:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:53,499 INFO L225 Difference]: With dead ends: 116 [2021-08-27 06:01:53,499 INFO L226 Difference]: Without dead ends: 116 [2021-08-27 06:01:53,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-08-27 06:01:53,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-27 06:01:53,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2021-08-27 06:01:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-08-27 06:01:53,502 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 44 [2021-08-27 06:01:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:53,502 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-08-27 06:01:53,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 06:01:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-08-27 06:01:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 06:01:53,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:53,503 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:53,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:53,718 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,SelfDestructingSolverStorable13 [2021-08-27 06:01:53,718 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:53,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:53,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2073773289, now seen corresponding path program 2 times [2021-08-27 06:01:53,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:53,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498361220] [2021-08-27 06:01:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:53,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:53,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:53,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:53,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:53,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 06:01:53,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:53,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498361220] [2021-08-27 06:01:53,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498361220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:53,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784592489] [2021-08-27 06:01:53,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:01:53,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:53,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:53,803 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:53,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 06:01:53,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:01:53,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:01:53,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 06:01:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:54,012 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:01:54,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 06:01:54,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-27 06:01:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-27 06:01:54,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784592489] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:54,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:01:54,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2021-08-27 06:01:54,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104329246] [2021-08-27 06:01:54,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:01:54,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:54,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:01:54,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-27 06:01:54,489 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:54,578 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2021-08-27 06:01:54,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:01:54,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 47 [2021-08-27 06:01:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:54,580 INFO L225 Difference]: With dead ends: 94 [2021-08-27 06:01:54,580 INFO L226 Difference]: Without dead ends: 94 [2021-08-27 06:01:54,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-27 06:01:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-27 06:01:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-08-27 06:01:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 78 states have (on average 1.141025641025641) internal successors, (89), 81 states have internal predecessors, (89), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:54,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-08-27 06:01:54,582 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 47 [2021-08-27 06:01:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:54,583 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-08-27 06:01:54,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 06:01:54,583 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-08-27 06:01:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 06:01:54,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:54,583 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:54,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:54,784 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,SelfDestructingSolverStorable14 [2021-08-27 06:01:54,784 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:54,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1444841842, now seen corresponding path program 1 times [2021-08-27 06:01:54,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:54,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525064981] [2021-08-27 06:01:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:54,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:54,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:54,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:54,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:54,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-27 06:01:54,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:54,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525064981] [2021-08-27 06:01:54,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525064981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:54,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982263506] [2021-08-27 06:01:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:54,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:54,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:54,845 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:54,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 06:01:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:55,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:01:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 06:01:55,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982263506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:55,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:55,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-27 06:01:55,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817650607] [2021-08-27 06:01:55,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 06:01:55,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 06:01:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:01:55,262 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 06:01:55,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:55,508 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2021-08-27 06:01:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 06:01:55,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 56 [2021-08-27 06:01:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:55,514 INFO L225 Difference]: With dead ends: 136 [2021-08-27 06:01:55,514 INFO L226 Difference]: Without dead ends: 130 [2021-08-27 06:01:55,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-27 06:01:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-27 06:01:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2021-08-27 06:01:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 94 states have internal predecessors, (103), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 06:01:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2021-08-27 06:01:55,518 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 56 [2021-08-27 06:01:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:55,518 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2021-08-27 06:01:55,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 06:01:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2021-08-27 06:01:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-27 06:01:55,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:55,521 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:55,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:55,732 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,SelfDestructingSolverStorable15 [2021-08-27 06:01:55,733 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1868655978, now seen corresponding path program 3 times [2021-08-27 06:01:55,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:55,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396792797] [2021-08-27 06:01:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:55,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:55,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:55,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:55,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:55,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 76 proven. 35 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-08-27 06:01:55,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:55,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396792797] [2021-08-27 06:01:55,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396792797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:55,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629965180] [2021-08-27 06:01:55,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 06:01:55,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:55,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:55,845 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:55,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 06:01:56,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-27 06:01:56,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:01:56,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:01:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-08-27 06:01:56,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629965180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:56,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:01:56,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 18 [2021-08-27 06:01:56,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171985875] [2021-08-27 06:01:56,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 06:01:56,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:56,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 06:01:56,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-27 06:01:56,308 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 15 states have internal predecessors, (66), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 06:01:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:56,714 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2021-08-27 06:01:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 06:01:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 15 states have internal predecessors, (66), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 74 [2021-08-27 06:01:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:56,715 INFO L225 Difference]: With dead ends: 154 [2021-08-27 06:01:56,715 INFO L226 Difference]: Without dead ends: 154 [2021-08-27 06:01:56,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-08-27 06:01:56,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-27 06:01:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2021-08-27 06:01:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 119 states have (on average 1.0924369747899159) internal successors, (130), 120 states have internal predecessors, (130), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 06:01:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2021-08-27 06:01:56,722 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 74 [2021-08-27 06:01:56,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:56,723 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2021-08-27 06:01:56,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 15 states have internal predecessors, (66), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 06:01:56,723 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2021-08-27 06:01:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-08-27 06:01:56,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:56,724 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:56,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:56,932 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,SelfDestructingSolverStorable16 [2021-08-27 06:01:56,933 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:56,933 INFO L82 PathProgramCache]: Analyzing trace with hash 241209475, now seen corresponding path program 2 times [2021-08-27 06:01:56,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:56,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461732866] [2021-08-27 06:01:56,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:56,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:56,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:56,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:56,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:56,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:57,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-27 06:01:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:57,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-08-27 06:01:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 97 proven. 49 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-08-27 06:01:57,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:57,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461732866] [2021-08-27 06:01:57,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461732866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:57,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949946148] [2021-08-27 06:01:57,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:01:57,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:57,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:57,049 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:57,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 06:01:57,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 06:01:57,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:01:57,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:01:57,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:01:57,379 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-27 06:01:57,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-27 06:01:57,564 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-27 06:01:57,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-27 06:01:57,827 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-27 06:01:57,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-27 06:01:58,179 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-27 06:01:58,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-27 06:01:58,493 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-27 06:01:58,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-27 06:01:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-08-27 06:01:58,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949946148] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:01:58,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:01:58,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2021-08-27 06:01:58,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608220354] [2021-08-27 06:01:58,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:01:58,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:01:58,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:01:58,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-27 06:01:58,842 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:01:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:01:58,901 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2021-08-27 06:01:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:01:58,901 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 103 [2021-08-27 06:01:58,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:01:58,902 INFO L225 Difference]: With dead ends: 133 [2021-08-27 06:01:58,902 INFO L226 Difference]: Without dead ends: 115 [2021-08-27 06:01:58,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:01:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-27 06:01:58,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-08-27 06:01:58,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 06:01:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2021-08-27 06:01:58,905 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 103 [2021-08-27 06:01:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:01:58,905 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2021-08-27 06:01:58,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:01:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2021-08-27 06:01:58,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-08-27 06:01:58,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:01:58,906 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:01:58,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 06:01:59,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-27 06:01:59,121 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:01:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:01:59,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1112349080, now seen corresponding path program 1 times [2021-08-27 06:01:59,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:01:59,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082967301] [2021-08-27 06:01:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:59,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:01:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:59,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:01:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:59,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:01:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:59,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:01:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:59,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:01:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:59,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-27 06:01:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:59,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-08-27 06:01:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 97 proven. 49 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-08-27 06:01:59,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:01:59,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082967301] [2021-08-27 06:01:59,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082967301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:01:59,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885518759] [2021-08-27 06:01:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:01:59,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:01:59,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:01:59,248 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:01:59,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 06:01:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:01:59,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 06:01:59,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 194 proven. 7 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-08-27 06:02:00,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885518759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:00,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:00,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-27 06:02:00,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874799182] [2021-08-27 06:02:00,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 06:02:00,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 06:02:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-27 06:02:00,006 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-08-27 06:02:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:00,284 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2021-08-27 06:02:00,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 06:02:00,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 104 [2021-08-27 06:02:00,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:00,285 INFO L225 Difference]: With dead ends: 133 [2021-08-27 06:02:00,285 INFO L226 Difference]: Without dead ends: 127 [2021-08-27 06:02:00,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-27 06:02:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-27 06:02:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2021-08-27 06:02:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 06:02:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-08-27 06:02:00,287 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 104 [2021-08-27 06:02:00,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:00,288 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-08-27 06:02:00,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-08-27 06:02:00,288 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-08-27 06:02:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-08-27 06:02:00,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:00,288 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:00,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:00,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:00,509 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:00,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1053830302, now seen corresponding path program 2 times [2021-08-27 06:02:00,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:00,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346760184] [2021-08-27 06:02:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:00,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:00,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:00,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:00,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:02:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:00,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:02:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:00,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-27 06:02:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:00,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-27 06:02:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-08-27 06:02:00,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:00,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346760184] [2021-08-27 06:02:00,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346760184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:00,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857704473] [2021-08-27 06:02:00,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:02:00,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:00,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:00,605 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:00,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 06:02:01,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:02:01,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:01,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-27 06:02:01,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 189 proven. 18 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-08-27 06:02:01,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857704473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:01,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:01,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-08-27 06:02:01,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949959509] [2021-08-27 06:02:01,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 06:02:01,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 06:02:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-27 06:02:01,440 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-08-27 06:02:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:01,822 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2021-08-27 06:02:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 06:02:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 114 [2021-08-27 06:02:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:01,823 INFO L225 Difference]: With dead ends: 146 [2021-08-27 06:02:01,823 INFO L226 Difference]: Without dead ends: 143 [2021-08-27 06:02:01,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 06:02:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-27 06:02:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2021-08-27 06:02:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 06:02:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2021-08-27 06:02:01,826 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 114 [2021-08-27 06:02:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:01,827 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2021-08-27 06:02:01,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-08-27 06:02:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2021-08-27 06:02:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-08-27 06:02:01,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:02:01,828 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:02:01,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:02,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:02,043 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-27 06:02:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:02:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash -491360571, now seen corresponding path program 3 times [2021-08-27 06:02:02,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:02:02,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037465551] [2021-08-27 06:02:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:02:02,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:02:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:02,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:02:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:02,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 06:02:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:02,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 06:02:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:02,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 06:02:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:02,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-27 06:02:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:02,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-27 06:02:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:02,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-27 06:02:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:02:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-08-27 06:02:02,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:02:02,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037465551] [2021-08-27 06:02:02,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037465551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:02,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533026404] [2021-08-27 06:02:02,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 06:02:02,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:02,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:02:02,157 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:02:02,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 06:02:02,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-27 06:02:02,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:02:02,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 06:02:02,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:02:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-08-27 06:02:03,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533026404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:02:03,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:02:03,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2021-08-27 06:02:03,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031706372] [2021-08-27 06:02:03,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 06:02:03,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:02:03,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 06:02:03,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:02:03,045 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 06:02:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:02:03,292 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2021-08-27 06:02:03,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 06:02:03,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 150 [2021-08-27 06:02:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:02:03,293 INFO L225 Difference]: With dead ends: 143 [2021-08-27 06:02:03,293 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 06:02:03,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-08-27 06:02:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 06:02:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 06:02:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 06:02:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 06:02:03,294 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 150 [2021-08-27 06:02:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:02:03,294 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 06:02:03,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 06:02:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 06:02:03,294 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 06:02:03,296 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr0ASSERT_VIOLATIONARRAY_INDEX [2021-08-27 06:02:03,296 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr1REQUIRES_VIOLATION [2021-08-27 06:02:03,296 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr2REQUIRES_VIOLATION [2021-08-27 06:02:03,296 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 06:02:03,296 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 06:02:03,296 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 06:02:03,296 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 06:02:03,296 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 06:02:03,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 06:02:03,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:02:03,500 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 06:02:03,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 06:02:03 BoogieIcfgContainer [2021-08-27 06:02:03,501 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 06:02:03,501 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 06:02:03,501 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 06:02:03,501 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 06:02:03,503 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:01:45" (3/4) ... [2021-08-27 06:02:03,505 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 06:02:03,509 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 06:02:03,509 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-08-27 06:02:03,509 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 06:02:03,512 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-08-27 06:02:03,512 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-27 06:02:03,512 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-08-27 06:02:03,512 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 06:02:03,529 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 06:02:03,529 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 06:02:03,530 INFO L168 Benchmark]: Toolchain (without parser) took 18000.79 ms. Allocated memory was 54.5 MB in the beginning and 251.7 MB in the end (delta: 197.1 MB). Free memory was 31.4 MB in the beginning and 122.4 MB in the end (delta: -91.0 MB). Peak memory consumption was 105.3 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:03,530 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 36.5 MB in the beginning and 36.4 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:02:03,530 INFO L168 Benchmark]: CACSL2BoogieTranslator took 124.61 ms. Allocated memory is still 54.5 MB. Free memory was 31.3 MB in the beginning and 36.0 MB in the end (delta: -4.7 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:03,530 INFO L168 Benchmark]: Boogie Preprocessor took 73.75 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.8 MB in the beginning and 50.6 MB in the end (delta: -14.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:03,531 INFO L168 Benchmark]: RCFGBuilder took 258.26 ms. Allocated memory is still 67.1 MB. Free memory was 50.4 MB in the beginning and 49.9 MB in the end (delta: 511.0 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:03,531 INFO L168 Benchmark]: TraceAbstraction took 17510.56 ms. Allocated memory was 67.1 MB in the beginning and 251.7 MB in the end (delta: 184.5 MB). Free memory was 49.4 MB in the beginning and 124.3 MB in the end (delta: -74.9 MB). Peak memory consumption was 109.4 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:03,531 INFO L168 Benchmark]: Witness Printer took 28.09 ms. Allocated memory is still 251.7 MB. Free memory was 124.3 MB in the beginning and 122.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:02:03,532 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 36.5 MB in the beginning and 36.4 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 124.61 ms. Allocated memory is still 54.5 MB. Free memory was 31.3 MB in the beginning and 36.0 MB in the end (delta: -4.7 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.75 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.8 MB in the beginning and 50.6 MB in the end (delta: -14.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 258.26 ms. Allocated memory is still 67.1 MB. Free memory was 50.4 MB in the beginning and 49.9 MB in the end (delta: 511.0 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17510.56 ms. Allocated memory was 67.1 MB in the beginning and 251.7 MB in the end (delta: 184.5 MB). Free memory was 49.4 MB in the beginning and 124.3 MB in the end (delta: -74.9 MB). Peak memory consumption was 109.4 MB. Max. memory is 16.1 GB. * Witness Printer took 28.09 ms. Allocated memory is still 251.7 MB. Free memory was 124.3 MB in the beginning and 122.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 17451.3ms, OverallIterations: 21, TraceHistogramMax: 14, EmptinessCheckTime: 25.5ms, AutomataDifference: 3545.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 501 SDtfs, 1619 SDslu, 1187 SDs, 0 SdLazy, 3376 SolverSat, 402 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1837.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1255 GetRequests, 972 SyntacticMatches, 24 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 2240.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=17, InterpolantAutomatonStates: 193, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 88.5ms AutomataMinimizationTime, 21 MinimizatonAttempts, 226 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 148.9ms SsaConstructionTime, 499.7ms SatisfiabilityAnalysisTime, 6828.0ms InterpolantComputationTime, 1919 NumberOfCodeBlocks, 1657 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 1882 ConstructedInterpolants, 144 QuantifiedInterpolants, 7467 SizeOfPredicates, 35 NumberOfNonLiveVariables, 2435 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 37 InterpolantComputations, 8 PerfectInterpolantSequences, 3433/3844 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 06:02:03,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...