./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 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/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-wip.dd.seqcomp-5fbdf5b [2021-08-30 17:39:07,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 17:39:07,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 17:39:07,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 17:39:07,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 17:39:07,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 17:39:07,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 17:39:07,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 17:39:07,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 17:39:07,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 17:39:07,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 17:39:07,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 17:39:07,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 17:39:07,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 17:39:07,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 17:39:07,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 17:39:07,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 17:39:07,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 17:39:07,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 17:39:07,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 17:39:07,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 17:39:07,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 17:39:07,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 17:39:07,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 17:39:07,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 17:39:07,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 17:39:07,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 17:39:07,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 17:39:07,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 17:39:07,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 17:39:07,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 17:39:07,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 17:39:07,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 17:39:07,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 17:39:07,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 17:39:07,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 17:39:07,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 17:39:07,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 17:39:07,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 17:39:07,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 17:39:07,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 17:39:07,414 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 17:39:07,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 17:39:07,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 17:39:07,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 17:39:07,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 17:39:07,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 17:39:07,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 17:39:07,456 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 17:39:07,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 17:39:07,456 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 17:39:07,456 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 17:39:07,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 17:39:07,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 17:39:07,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 17:39:07,458 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 17:39:07,458 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 17:39:07,468 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 17:39:07,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 17:39:07,469 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 17:39:07,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 17:39:07,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 17:39:07,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 17:39:07,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 17:39:07,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 17:39:07,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:39:07,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 17:39:07,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 17:39:07,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 17:39:07,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 17:39:07,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 17:39:07,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32d9f155778c5c4efaa55d37fdad329bb0d271b5 [2021-08-30 17:39:07,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 17:39:07,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 17:39:07,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 17:39:07,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 17:39:07,804 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 17:39:07,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2021-08-30 17:39:07,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad62d52d/f5b6d7d20d154c16969d6ba1eef7d8ab/FLAG3894d85e1 [2021-08-30 17:39:08,301 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 17:39:08,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2021-08-30 17:39:08,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad62d52d/f5b6d7d20d154c16969d6ba1eef7d8ab/FLAG3894d85e1 [2021-08-30 17:39:08,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad62d52d/f5b6d7d20d154c16969d6ba1eef7d8ab [2021-08-30 17:39:08,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 17:39:08,329 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 17:39:08,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 17:39:08,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 17:39:08,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 17:39:08,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:39:08" (1/1) ... [2021-08-30 17:39:08,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc3985f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:08, skipping insertion in model container [2021-08-30 17:39:08,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:39:08" (1/1) ... [2021-08-30 17:39:08,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 17:39:08,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 17:39:08,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:39:08,474 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 17:39:08,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:39:08,495 INFO L208 MainTranslator]: Completed translation [2021-08-30 17:39:08,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:08 WrapperNode [2021-08-30 17:39:08,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 17:39:08,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 17:39:08,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 17:39:08,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 17:39:08,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:08" (1/1) ... [2021-08-30 17:39:08,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:08" (1/1) ... [2021-08-30 17:39:08,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:08" (1/1) ... [2021-08-30 17:39:08,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:08" (1/1) ... [2021-08-30 17:39:08,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:08" (1/1) ... [2021-08-30 17:39:08,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:08" (1/1) ... [2021-08-30 17:39:08,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:08" (1/1) ... [2021-08-30 17:39:08,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 17:39:08,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 17:39:08,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 17:39:08,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 17:39:08,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:08" (1/1) ... [2021-08-30 17:39:08,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:39:08,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:08,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-30 17:39:08,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-30 17:39:08,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 17:39:08,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 17:39:08,623 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-30 17:39:08,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 17:39:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-30 17:39:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 17:39:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 17:39:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 17:39:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 17:39:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 17:39:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 17:39:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 17:39:08,737 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 17:39:08,738 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-30 17:39:08,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:39:08 BoogieIcfgContainer [2021-08-30 17:39:08,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 17:39:08,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 17:39:08,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 17:39:08,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 17:39:08,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:39:08" (1/3) ... [2021-08-30 17:39:08,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4744da4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:39:08, skipping insertion in model container [2021-08-30 17:39:08,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:39:08" (2/3) ... [2021-08-30 17:39:08,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4744da4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:39:08, skipping insertion in model container [2021-08-30 17:39:08,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:39:08" (3/3) ... [2021-08-30 17:39:08,745 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2021-08-30 17:39:08,749 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 17:39:08,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-08-30 17:39:08,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 17:39:08,787 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-30 17:39:08,788 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-30 17:39:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:39:08,804 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:08,805 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:08,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:08,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-08-30 17:39:08,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:08,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608303966] [2021-08-30 17:39:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:08,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:09,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:09,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608303966] [2021-08-30 17:39:09,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608303966] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:09,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:09,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 17:39:09,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369940529] [2021-08-30 17:39:09,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:39:09,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:09,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:39:09,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:39:09,088 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:09,291 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-08-30 17:39:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:39:09,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 17:39:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:09,300 INFO L225 Difference]: With dead ends: 58 [2021-08-30 17:39:09,302 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 17:39:09,304 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.47ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:39:09,311 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.60ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 162.96ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:09,313 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 14 Invalid, 106 Unknown, 0 Unchecked, 3.60ms Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 162.96ms Time] [2021-08-30 17:39:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 17:39:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-08-30 17:39:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 33 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-30 17:39:09,348 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-08-30 17:39:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:09,349 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-30 17:39:09,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-30 17:39:09,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 17:39:09,350 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:09,350 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:09,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 17:39:09,351 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:09,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:09,355 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-08-30 17:39:09,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:09,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668301873] [2021-08-30 17:39:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:09,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:09,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:09,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668301873] [2021-08-30 17:39:09,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668301873] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:09,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:09,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:39:09,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463232720] [2021-08-30 17:39:09,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:39:09,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:39:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:39:09,466 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:09,636 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-08-30 17:39:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:39:09,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 17:39:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:09,638 INFO L225 Difference]: With dead ends: 59 [2021-08-30 17:39:09,638 INFO L226 Difference]: Without dead ends: 59 [2021-08-30 17:39:09,638 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.19ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:39:09,640 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.75ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:09,640 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 20 Invalid, 171 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 141.75ms Time] [2021-08-30 17:39:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-30 17:39:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2021-08-30 17:39:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 38 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-08-30 17:39:09,646 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2021-08-30 17:39:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:09,647 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-08-30 17:39:09,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:39:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-08-30 17:39:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:39:09,648 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:09,648 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:09,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 17:39:09,649 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-08-30 17:39:09,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:09,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923683221] [2021-08-30 17:39:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:09,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:09,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:09,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923683221] [2021-08-30 17:39:09,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923683221] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:09,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:09,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:39:09,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718737473] [2021-08-30 17:39:09,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:39:09,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:09,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:39:09,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:39:09,707 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:09,760 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-08-30 17:39:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:39:09,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-08-30 17:39:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:09,763 INFO L225 Difference]: With dead ends: 43 [2021-08-30 17:39:09,763 INFO L226 Difference]: Without dead ends: 43 [2021-08-30 17:39:09,763 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.21ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:39:09,764 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.73ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.90ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:09,765 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 8 Invalid, 77 Unknown, 0 Unchecked, 0.73ms Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 48.90ms Time] [2021-08-30 17:39:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-30 17:39:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-30 17:39:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.3) internal successors, (39), 36 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-08-30 17:39:09,770 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2021-08-30 17:39:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:09,770 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-08-30 17:39:09,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-08-30 17:39:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:39:09,771 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:09,772 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:09,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 17:39:09,772 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:09,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:09,773 INFO L82 PathProgramCache]: Analyzing trace with hash 143250927, now seen corresponding path program 1 times [2021-08-30 17:39:09,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:09,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892249389] [2021-08-30 17:39:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:09,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:09,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:09,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892249389] [2021-08-30 17:39:09,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892249389] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:09,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:09,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 17:39:09,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261317890] [2021-08-30 17:39:09,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:39:09,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:39:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:39:09,862 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) [2021-08-30 17:39:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:09,939 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-08-30 17:39:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:39:09,940 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 [2021-08-30 17:39:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:09,941 INFO L225 Difference]: With dead ends: 47 [2021-08-30 17:39:09,941 INFO L226 Difference]: Without dead ends: 47 [2021-08-30 17:39:09,941 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.90ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:39:09,943 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.03ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:09,943 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 15 Invalid, 126 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [4 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 72.03ms Time] [2021-08-30 17:39:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-30 17:39:09,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-08-30 17:39:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-08-30 17:39:09,948 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2021-08-30 17:39:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:09,948 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-08-30 17:39:09,948 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) [2021-08-30 17:39:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-08-30 17:39:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 17:39:09,949 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:09,949 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:09,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 17:39:09,950 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:09,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:09,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1902162976, now seen corresponding path program 1 times [2021-08-30 17:39:09,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:09,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369263400] [2021-08-30 17:39:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:09,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:09,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:09,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369263400] [2021-08-30 17:39:09,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369263400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:09,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815903206] [2021-08-30 17:39:09,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:09,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:09,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:09,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:10,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 17:39:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 17:39:10,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:10,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:10,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815903206] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:10,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:10,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-08-30 17:39:10,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557355960] [2021-08-30 17:39:10,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:39:10,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:10,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:39:10,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:39:10,242 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:39:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:10,408 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-08-30 17:39:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:39:10,408 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2021-08-30 17:39:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:10,409 INFO L225 Difference]: With dead ends: 88 [2021-08-30 17:39:10,410 INFO L226 Difference]: Without dead ends: 88 [2021-08-30 17:39:10,410 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.78ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:39:10,411 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 67 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 155.82ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:10,411 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 25 Invalid, 214 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [20 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 155.82ms Time] [2021-08-30 17:39:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-30 17:39:10,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-08-30 17:39:10,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 62 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:39:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-08-30 17:39:10,417 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 21 [2021-08-30 17:39:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:10,417 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-08-30 17:39:10,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:39:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-08-30 17:39:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 17:39:10,418 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:10,418 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:10,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:10,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:10,635 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:10,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:10,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1165178250, now seen corresponding path program 1 times [2021-08-30 17:39:10,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:10,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279540775] [2021-08-30 17:39:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:10,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 17:39:10,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:10,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279540775] [2021-08-30 17:39:10,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279540775] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:10,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:39:10,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:39:10,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227659369] [2021-08-30 17:39:10,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:39:10,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:10,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:39:10,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:39:10,686 INFO L87 Difference]: Start difference. First operand 72 states and 85 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) [2021-08-30 17:39:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:10,755 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-08-30 17:39:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:39:10,755 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 [2021-08-30 17:39:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:10,761 INFO L225 Difference]: With dead ends: 82 [2021-08-30 17:39:10,761 INFO L226 Difference]: Without dead ends: 82 [2021-08-30 17:39:10,761 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.44ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:39:10,765 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.77ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.04ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:10,770 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 11 Invalid, 90 Unknown, 0 Unchecked, 0.77ms Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 55.04ms Time] [2021-08-30 17:39:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-30 17:39:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2021-08-30 17:39:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.305084745762712) internal successors, (77), 64 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:39:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-08-30 17:39:10,782 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 22 [2021-08-30 17:39:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:10,783 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-08-30 17:39:10,783 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) [2021-08-30 17:39:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-08-30 17:39:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 17:39:10,784 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:10,784 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:10,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 17:39:10,784 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787427, now seen corresponding path program 1 times [2021-08-30 17:39:10,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:10,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847732406] [2021-08-30 17:39:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:10,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:39:10,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:10,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847732406] [2021-08-30 17:39:10,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847732406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:10,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476522455] [2021-08-30 17:39:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:10,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:10,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:10,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:10,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 17:39:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:10,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:10,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:10,966 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:39:10,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-08-30 17:39:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:39:11,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:39:11,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476522455] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:11,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:11,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 7 [2021-08-30 17:39:11,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300228822] [2021-08-30 17:39:11,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:39:11,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:11,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:39:11,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:39:11,116 INFO L87 Difference]: Start difference. First operand 74 states and 88 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) [2021-08-30 17:39:11,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:11,229 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-08-30 17:39:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:39:11,230 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 [2021-08-30 17:39:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:11,233 INFO L225 Difference]: With dead ends: 73 [2021-08-30 17:39:11,233 INFO L226 Difference]: Without dead ends: 73 [2021-08-30 17:39:11,234 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.50ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:39:11,235 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 78.32ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:11,236 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 11 Invalid, 140 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 7 Unchecked, 78.32ms Time] [2021-08-30 17:39:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-30 17:39:11,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-08-30 17:39:11,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 63 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:39:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-08-30 17:39:11,256 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 23 [2021-08-30 17:39:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:11,256 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-08-30 17:39:11,256 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) [2021-08-30 17:39:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-08-30 17:39:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 17:39:11,257 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:11,261 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:11,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:11,480 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 [2021-08-30 17:39:11,481 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787428, now seen corresponding path program 1 times [2021-08-30 17:39:11,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:11,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893634167] [2021-08-30 17:39:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:11,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:11,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:11,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:39:11,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:11,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893634167] [2021-08-30 17:39:11,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893634167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:11,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231261131] [2021-08-30 17:39:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:11,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:11,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:11,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:11,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 17:39:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:11,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-30 17:39:11,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:11,642 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 17:39:11,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 17:39:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:39:11,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:39:11,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231261131] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:11,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:11,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2021-08-30 17:39:11,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294926840] [2021-08-30 17:39:11,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:39:11,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:11,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:39:11,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:39:11,909 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 17:39:12,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:12,106 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2021-08-30 17:39:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:39:12,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2021-08-30 17:39:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:12,107 INFO L225 Difference]: With dead ends: 86 [2021-08-30 17:39:12,107 INFO L226 Difference]: Without dead ends: 86 [2021-08-30 17:39:12,108 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 117.93ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:39:12,108 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 87 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 142.18ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:12,108 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 20 Invalid, 231 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [6 Valid, 202 Invalid, 0 Unknown, 23 Unchecked, 142.18ms Time] [2021-08-30 17:39:12,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-30 17:39:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2021-08-30 17:39:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 69 states have internal predecessors, (84), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:39:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2021-08-30 17:39:12,115 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 23 [2021-08-30 17:39:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:12,115 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2021-08-30 17:39:12,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 17:39:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2021-08-30 17:39:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 17:39:12,116 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:12,116 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:12,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:12,330 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 [2021-08-30 17:39:12,330 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:12,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1134972881, now seen corresponding path program 1 times [2021-08-30 17:39:12,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:12,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492150767] [2021-08-30 17:39:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:12,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:39:12,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:12,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492150767] [2021-08-30 17:39:12,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492150767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:12,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908954718] [2021-08-30 17:39:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:12,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:12,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:12,401 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:12,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 17:39:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 17:39:12,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:39:12,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:39:12,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908954718] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:12,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:39:12,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2021-08-30 17:39:12,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640197980] [2021-08-30 17:39:12,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:39:12,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:12,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:39:12,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:39:12,534 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:12,626 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-08-30 17:39:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:39:12,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-08-30 17:39:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:12,628 INFO L225 Difference]: With dead ends: 86 [2021-08-30 17:39:12,628 INFO L226 Difference]: Without dead ends: 83 [2021-08-30 17:39:12,628 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.36ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:39:12,629 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.86ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.50ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:12,629 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 172 Unknown, 0 Unchecked, 0.86ms Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 80.50ms Time] [2021-08-30 17:39:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-30 17:39:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2021-08-30 17:39:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 69 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:39:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2021-08-30 17:39:12,634 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 26 [2021-08-30 17:39:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:12,634 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2021-08-30 17:39:12,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:12,634 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2021-08-30 17:39:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 17:39:12,635 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:12,635 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:12,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:12,844 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 [2021-08-30 17:39:12,845 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1992931931, now seen corresponding path program 1 times [2021-08-30 17:39:12,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:12,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039463065] [2021-08-30 17:39:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:12,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:12,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:12,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039463065] [2021-08-30 17:39:12,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039463065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:12,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539024525] [2021-08-30 17:39:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:12,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:12,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:12,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:12,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 17:39:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:12,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 17:39:12,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:13,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:39:13,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539024525] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:13,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:13,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2021-08-30 17:39:13,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194364071] [2021-08-30 17:39:13,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:39:13,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:13,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:39:13,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:39:13,130 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:13,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:13,329 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-08-30 17:39:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 17:39:13,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-08-30 17:39:13,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:13,330 INFO L225 Difference]: With dead ends: 98 [2021-08-30 17:39:13,330 INFO L226 Difference]: Without dead ends: 98 [2021-08-30 17:39:13,331 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 102.08ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-30 17:39:13,331 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.00ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:13,331 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 246 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [15 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 138.00ms Time] [2021-08-30 17:39:13,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-30 17:39:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2021-08-30 17:39:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 78 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:39:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-08-30 17:39:13,336 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 27 [2021-08-30 17:39:13,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:13,337 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-08-30 17:39:13,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-08-30 17:39:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-30 17:39:13,338 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:13,338 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:13,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:13,556 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 [2021-08-30 17:39:13,556 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:13,557 INFO L82 PathProgramCache]: Analyzing trace with hash -790766996, now seen corresponding path program 1 times [2021-08-30 17:39:13,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:13,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341947943] [2021-08-30 17:39:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:13,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:13,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:13,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:13,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:39:13,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:13,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341947943] [2021-08-30 17:39:13,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341947943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:13,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587365143] [2021-08-30 17:39:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:13,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:13,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:13,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:13,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 17:39:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:13,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-30 17:39:13,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:13,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-30 17:39:13,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-08-30 17:39:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:39:14,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:39:14,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587365143] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:14,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:14,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 3] total 12 [2021-08-30 17:39:14,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676001816] [2021-08-30 17:39:14,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 17:39:14,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:14,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 17:39:14,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:39:14,199 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 13 states, 11 states have (on average 4.363636363636363) internal successors, (48), 12 states have internal predecessors, (48), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-30 17:39:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:14,282 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-08-30 17:39:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 17:39:14,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.363636363636363) internal successors, (48), 12 states have internal predecessors, (48), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 31 [2021-08-30 17:39:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:14,283 INFO L225 Difference]: With dead ends: 89 [2021-08-30 17:39:14,283 INFO L226 Difference]: Without dead ends: 89 [2021-08-30 17:39:14,284 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 150.03ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-30 17:39:14,284 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 59.54ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:14,285 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 152 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [11 Valid, 103 Invalid, 0 Unknown, 38 Unchecked, 59.54ms Time] [2021-08-30 17:39:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-30 17:39:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-08-30 17:39:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 78 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:39:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-08-30 17:39:14,289 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 31 [2021-08-30 17:39:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:14,289 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-08-30 17:39:14,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.363636363636363) internal successors, (48), 12 states have internal predecessors, (48), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-30 17:39:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-08-30 17:39:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-30 17:39:14,290 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:14,290 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:14,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:14,500 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 [2021-08-30 17:39:14,501 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash -174164318, now seen corresponding path program 2 times [2021-08-30 17:39:14,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:14,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82098266] [2021-08-30 17:39:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:14,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:14,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:14,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:14,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-30 17:39:14,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:14,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82098266] [2021-08-30 17:39:14,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82098266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:14,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466836281] [2021-08-30 17:39:14,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:14,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:14,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:14,568 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:14,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-30 17:39:14,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:39:14,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:14,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 17:39:14,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:39:14,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:39:14,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466836281] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:14,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:14,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 17 [2021-08-30 17:39:14,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656250745] [2021-08-30 17:39:14,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-30 17:39:14,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:14,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-30 17:39:14,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-30 17:39:14,974 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-30 17:39:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:15,438 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2021-08-30 17:39:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-30 17:39:15,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-08-30 17:39:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:15,439 INFO L225 Difference]: With dead ends: 147 [2021-08-30 17:39:15,439 INFO L226 Difference]: Without dead ends: 147 [2021-08-30 17:39:15,440 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 297.79ms TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-08-30 17:39:15,440 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 284 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 200.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.86ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 264.22ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:15,441 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 39 Invalid, 487 Unknown, 0 Unchecked, 2.86ms Time], IncrementalHoareTripleChecker [63 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 264.22ms Time] [2021-08-30 17:39:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-30 17:39:15,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2021-08-30 17:39:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 99 states have (on average 1.202020202020202) internal successors, (119), 102 states have internal predecessors, (119), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:39:15,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2021-08-30 17:39:15,446 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 43 [2021-08-30 17:39:15,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:15,446 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2021-08-30 17:39:15,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-30 17:39:15,447 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2021-08-30 17:39:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-30 17:39:15,448 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:15,448 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:15,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:15,648 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 [2021-08-30 17:39:15,648 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:15,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1407287743, now seen corresponding path program 1 times [2021-08-30 17:39:15,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:15,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698863879] [2021-08-30 17:39:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:15,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:15,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:15,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:15,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-08-30 17:39:15,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:15,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698863879] [2021-08-30 17:39:15,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698863879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:15,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857960372] [2021-08-30 17:39:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:15,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:15,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:15,763 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:15,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-30 17:39:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:15,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 17:39:15,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:39:15,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:39:16,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857960372] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:16,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:16,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 18 [2021-08-30 17:39:16,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039199300] [2021-08-30 17:39:16,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-30 17:39:16,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-30 17:39:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-30 17:39:16,118 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:39:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:16,669 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2021-08-30 17:39:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-30 17:39:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2021-08-30 17:39:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:16,671 INFO L225 Difference]: With dead ends: 127 [2021-08-30 17:39:16,671 INFO L226 Difference]: Without dead ends: 127 [2021-08-30 17:39:16,672 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 424.28ms TimeCoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-08-30 17:39:16,672 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 192 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 198.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 236.69ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:16,672 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 43 Invalid, 524 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [49 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 236.69ms Time] [2021-08-30 17:39:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-30 17:39:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2021-08-30 17:39:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 92 states have internal predecessors, (106), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:39:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2021-08-30 17:39:16,676 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 49 [2021-08-30 17:39:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:16,676 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2021-08-30 17:39:16,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:39:16,677 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2021-08-30 17:39:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-30 17:39:16,678 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:16,678 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:16,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:16,899 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 [2021-08-30 17:39:16,900 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash -986311322, now seen corresponding path program 2 times [2021-08-30 17:39:16,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:16,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161031337] [2021-08-30 17:39:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:16,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:16,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:16,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:16,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:16,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:16,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-08-30 17:39:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 52 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-30 17:39:17,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:17,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161031337] [2021-08-30 17:39:17,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161031337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:17,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338366793] [2021-08-30 17:39:17,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:17,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:17,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:17,008 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:17,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-30 17:39:17,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:39:17,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:17,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 74 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 17:39:17,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-08-30 17:39:17,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338366793] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:17,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:17,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 16 [2021-08-30 17:39:17,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143734048] [2021-08-30 17:39:17,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-30 17:39:17,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:17,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-30 17:39:17,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:39:17,442 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 15 states have internal predecessors, (77), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-30 17:39:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:17,763 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2021-08-30 17:39:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 17:39:17,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 15 states have internal predecessors, (77), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 63 [2021-08-30 17:39:17,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:17,767 INFO L225 Difference]: With dead ends: 128 [2021-08-30 17:39:17,767 INFO L226 Difference]: Without dead ends: 122 [2021-08-30 17:39:17,768 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 200.31ms TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2021-08-30 17:39:17,768 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.59ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 205.38ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:17,769 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 28 Invalid, 504 Unknown, 0 Unchecked, 2.59ms Time], IncrementalHoareTripleChecker [22 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 205.38ms Time] [2021-08-30 17:39:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-30 17:39:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-08-30 17:39:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 97 states have internal predecessors, (110), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:39:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2021-08-30 17:39:17,773 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 63 [2021-08-30 17:39:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:17,774 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2021-08-30 17:39:17,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 15 states have internal predecessors, (77), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-30 17:39:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2021-08-30 17:39:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-30 17:39:17,778 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:17,778 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:17,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-30 17:39:18,000 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 [2021-08-30 17:39:18,001 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:18,001 INFO L82 PathProgramCache]: Analyzing trace with hash 289708908, now seen corresponding path program 3 times [2021-08-30 17:39:18,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:18,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223731229] [2021-08-30 17:39:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:18,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:18,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:18,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:18,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:18,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:18,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-08-30 17:39:18,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:18,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223731229] [2021-08-30 17:39:18,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223731229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:18,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518819254] [2021-08-30 17:39:18,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 17:39:18,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:18,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:18,125 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:18,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-30 17:39:18,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-30 17:39:18,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:18,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:18,192 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:39:18,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-30 17:39:18,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-30 17:39:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-08-30 17:39:18,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:39:18,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518819254] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:18,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:39:18,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2021-08-30 17:39:18,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037574158] [2021-08-30 17:39:18,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:39:18,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:39:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:39:18,822 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:18,833 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2021-08-30 17:39:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:39:18,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (4), 2 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 73 [2021-08-30 17:39:18,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:18,834 INFO L225 Difference]: With dead ends: 109 [2021-08-30 17:39:18,834 INFO L226 Difference]: Without dead ends: 109 [2021-08-30 17:39:18,836 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 203.51ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:39:18,836 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 8.43ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:18,836 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 61 Unknown, 0 Unchecked, 0.22ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 47 Unchecked, 8.43ms Time] [2021-08-30 17:39:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-30 17:39:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-08-30 17:39:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 96 states have internal predecessors, (108), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:39:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2021-08-30 17:39:18,840 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 73 [2021-08-30 17:39:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:18,841 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2021-08-30 17:39:18,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:39:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2021-08-30 17:39:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-30 17:39:18,845 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:18,845 INFO L513 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] [2021-08-30 17:39:18,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:19,064 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 [2021-08-30 17:39:19,065 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:19,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1059801477, now seen corresponding path program 1 times [2021-08-30 17:39:19,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:19,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676435298] [2021-08-30 17:39:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:19,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:19,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:19,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:19,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:19,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:19,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:19,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-08-30 17:39:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-08-30 17:39:19,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:19,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676435298] [2021-08-30 17:39:19,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676435298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:19,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655044349] [2021-08-30 17:39:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:19,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:19,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:19,185 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:19,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-30 17:39:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 17:39:19,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 194 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-08-30 17:39:19,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 111 proven. 35 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-08-30 17:39:19,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655044349] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:19,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:19,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 17 [2021-08-30 17:39:19,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102942750] [2021-08-30 17:39:19,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-30 17:39:19,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:19,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-30 17:39:19,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-30 17:39:19,794 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 16 states have internal predecessors, (88), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-08-30 17:39:20,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:20,111 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2021-08-30 17:39:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-30 17:39:20,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 16 states have internal predecessors, (88), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 100 [2021-08-30 17:39:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:20,113 INFO L225 Difference]: With dead ends: 132 [2021-08-30 17:39:20,113 INFO L226 Difference]: Without dead ends: 129 [2021-08-30 17:39:20,113 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 219.15ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-08-30 17:39:20,114 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 133 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.19ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.52ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:20,114 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 41 Invalid, 481 Unknown, 0 Unchecked, 2.19ms Time], IncrementalHoareTripleChecker [36 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 215.52ms Time] [2021-08-30 17:39:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-30 17:39:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2021-08-30 17:39:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 100 states have (on average 1.12) internal successors, (112), 101 states have internal predecessors, (112), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-30 17:39:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2021-08-30 17:39:20,117 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 100 [2021-08-30 17:39:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:20,117 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2021-08-30 17:39:20,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 16 states have internal predecessors, (88), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-08-30 17:39:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2021-08-30 17:39:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-08-30 17:39:20,119 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:20,119 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:20,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:20,328 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 [2021-08-30 17:39:20,329 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash -311092151, now seen corresponding path program 1 times [2021-08-30 17:39:20,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:20,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701106471] [2021-08-30 17:39:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:20,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:20,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:20,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:20,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:20,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:20,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:20,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:39:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-08-30 17:39:20,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:20,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701106471] [2021-08-30 17:39:20,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701106471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:20,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065452400] [2021-08-30 17:39:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:20,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:20,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:20,430 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:20,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-30 17:39:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:20,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-30 17:39:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 189 proven. 18 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-08-30 17:39:20,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 189 proven. 18 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-08-30 17:39:21,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065452400] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:21,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:21,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 23 [2021-08-30 17:39:21,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209162728] [2021-08-30 17:39:21,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-30 17:39:21,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-30 17:39:21,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-30 17:39:21,172 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 22 states have internal predecessors, (108), 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) [2021-08-30 17:39:21,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:21,684 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2021-08-30 17:39:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-30 17:39:21,684 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 22 states have internal predecessors, (108), 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 113 [2021-08-30 17:39:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:21,686 INFO L225 Difference]: With dead ends: 196 [2021-08-30 17:39:21,686 INFO L226 Difference]: Without dead ends: 196 [2021-08-30 17:39:21,686 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 317.45ms TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2021-08-30 17:39:21,687 INFO L928 BasicCegarLoop]: 11 mSDtfsCounter, 392 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.82ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 341.23ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:21,687 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 62 Invalid, 819 Unknown, 0 Unchecked, 3.82ms Time], IncrementalHoareTripleChecker [85 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 341.23ms Time] [2021-08-30 17:39:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-30 17:39:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 149. [2021-08-30 17:39:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 133 states have (on average 1.1203007518796992) internal successors, (149), 134 states have internal predecessors, (149), 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) [2021-08-30 17:39:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2021-08-30 17:39:21,691 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 113 [2021-08-30 17:39:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:21,691 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2021-08-30 17:39:21,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 22 states have internal predecessors, (108), 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) [2021-08-30 17:39:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2021-08-30 17:39:21,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-08-30 17:39:21,692 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:21,693 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:21,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:21,904 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 [2021-08-30 17:39:21,905 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:21,905 INFO L82 PathProgramCache]: Analyzing trace with hash -154400634, now seen corresponding path program 2 times [2021-08-30 17:39:21,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:21,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664478884] [2021-08-30 17:39:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:21,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:21,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:21,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:21,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:22,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:22,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:22,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:39:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:22,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-30 17:39:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-08-30 17:39:22,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:22,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664478884] [2021-08-30 17:39:22,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664478884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:22,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585537042] [2021-08-30 17:39:22,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:22,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:22,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:22,024 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:22,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-30 17:39:22,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:39:22,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:22,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:22,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:22,126 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:22,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:22,270 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:22,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:22,491 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:22,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:22,758 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:22,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:23,081 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:23,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:23,488 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:23,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 710 trivial. 0 not checked. [2021-08-30 17:39:23,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:39:23,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585537042] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:23,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:39:23,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-08-30 17:39:23,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864762037] [2021-08-30 17:39:23,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:39:23,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:23,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:39:23,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:39:23,921 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:23,945 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2021-08-30 17:39:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:39:23,945 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 149 [2021-08-30 17:39:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:23,946 INFO L225 Difference]: With dead ends: 150 [2021-08-30 17:39:23,946 INFO L226 Difference]: Without dead ends: 148 [2021-08-30 17:39:23,947 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 148 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 148.69ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:39:23,947 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.34ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 21.43ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:23,947 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 67 Unknown, 0 Unchecked, 0.34ms Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 38 Unchecked, 21.43ms Time] [2021-08-30 17:39:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-30 17:39:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-08-30 17:39:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 132 states have (on average 1.0757575757575757) internal successors, (142), 133 states have internal predecessors, (142), 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) [2021-08-30 17:39:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 157 transitions. [2021-08-30 17:39:23,951 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 157 transitions. Word has length 149 [2021-08-30 17:39:23,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:23,952 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 157 transitions. [2021-08-30 17:39:23,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 157 transitions. [2021-08-30 17:39:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-08-30 17:39:23,953 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:23,953 INFO L513 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] [2021-08-30 17:39:23,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:24,168 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 [2021-08-30 17:39:24,169 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash -491360571, now seen corresponding path program 1 times [2021-08-30 17:39:24,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:24,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117475927] [2021-08-30 17:39:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:24,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:39:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-30 17:39:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-08-30 17:39:24,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:24,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117475927] [2021-08-30 17:39:24,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117475927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:24,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713968211] [2021-08-30 17:39:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:24,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:24,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:24,276 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:24,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-30 17:39:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:24,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 17:39:24,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 346 proven. 34 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-08-30 17:39:24,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 346 proven. 34 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-08-30 17:39:25,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713968211] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:25,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:25,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 27 [2021-08-30 17:39:25,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494652158] [2021-08-30 17:39:25,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-30 17:39:25,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:25,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-30 17:39:25,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-08-30 17:39:25,204 INFO L87 Difference]: Start difference. First operand 148 states and 157 transitions. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 26 states have internal predecessors, (128), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-30 17:39:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:25,810 INFO L93 Difference]: Finished difference Result 238 states and 250 transitions. [2021-08-30 17:39:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-30 17:39:25,811 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 26 states have internal predecessors, (128), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 150 [2021-08-30 17:39:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:25,812 INFO L225 Difference]: With dead ends: 238 [2021-08-30 17:39:25,812 INFO L226 Difference]: Without dead ends: 238 [2021-08-30 17:39:25,813 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 405.28ms TimeCoverageRelationStatistics Valid=357, Invalid=1623, Unknown=0, NotChecked=0, Total=1980 [2021-08-30 17:39:25,814 INFO L928 BasicCegarLoop]: 12 mSDtfsCounter, 395 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 308.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.90ms SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 394.63ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:25,814 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 73 Invalid, 891 Unknown, 0 Unchecked, 3.90ms Time], IncrementalHoareTripleChecker [113 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 394.63ms Time] [2021-08-30 17:39:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-30 17:39:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 188. [2021-08-30 17:39:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 170 states have (on average 1.0823529411764705) internal successors, (184), 171 states have internal predecessors, (184), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-30 17:39:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 201 transitions. [2021-08-30 17:39:25,820 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 201 transitions. Word has length 150 [2021-08-30 17:39:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:25,821 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 201 transitions. [2021-08-30 17:39:25,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 26 states have internal predecessors, (128), 13 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-30 17:39:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 201 transitions. [2021-08-30 17:39:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-08-30 17:39:25,823 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:25,823 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:25,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:26,045 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 [2021-08-30 17:39:26,045 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:26,045 INFO L82 PathProgramCache]: Analyzing trace with hash 926699357, now seen corresponding path program 2 times [2021-08-30 17:39:26,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:26,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110951638] [2021-08-30 17:39:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:26,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:39:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-30 17:39:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-08-30 17:39:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2021-08-30 17:39:26,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:26,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110951638] [2021-08-30 17:39:26,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110951638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:26,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808372866] [2021-08-30 17:39:26,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:26,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:26,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:26,189 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:26,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-30 17:39:26,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:39:26,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:26,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-30 17:39:26,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 577 proven. 55 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2021-08-30 17:39:26,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 577 proven. 55 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2021-08-30 17:39:27,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808372866] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:27,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:27,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 31 [2021-08-30 17:39:27,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226845189] [2021-08-30 17:39:27,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-30 17:39:27,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-30 17:39:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-08-30 17:39:27,267 INFO L87 Difference]: Start difference. First operand 188 states and 201 transitions. Second operand has 31 states, 31 states have (on average 4.774193548387097) internal successors, (148), 30 states have internal predecessors, (148), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-08-30 17:39:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:27,891 INFO L93 Difference]: Finished difference Result 312 states and 331 transitions. [2021-08-30 17:39:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-30 17:39:27,891 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.774193548387097) internal successors, (148), 30 states have internal predecessors, (148), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 191 [2021-08-30 17:39:27,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:27,893 INFO L225 Difference]: With dead ends: 312 [2021-08-30 17:39:27,893 INFO L226 Difference]: Without dead ends: 312 [2021-08-30 17:39:27,894 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 376 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 463.18ms TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2021-08-30 17:39:27,895 INFO L928 BasicCegarLoop]: 13 mSDtfsCounter, 472 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 305.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.07ms SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 387.50ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:27,895 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 72 Invalid, 954 Unknown, 0 Unchecked, 3.07ms Time], IncrementalHoareTripleChecker [128 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 387.50ms Time] [2021-08-30 17:39:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-08-30 17:39:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 233. [2021-08-30 17:39:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 213 states have (on average 1.0892018779342723) internal successors, (232), 214 states have internal predecessors, (232), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-30 17:39:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 251 transitions. [2021-08-30 17:39:27,901 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 251 transitions. Word has length 191 [2021-08-30 17:39:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:27,902 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 251 transitions. [2021-08-30 17:39:27,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.774193548387097) internal successors, (148), 30 states have internal predecessors, (148), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-08-30 17:39:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 251 transitions. [2021-08-30 17:39:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-08-30 17:39:27,904 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:27,905 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:27,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-30 17:39:28,117 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 [2021-08-30 17:39:28,118 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:28,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:28,118 INFO L82 PathProgramCache]: Analyzing trace with hash 335565920, now seen corresponding path program 3 times [2021-08-30 17:39:28,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:28,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32026083] [2021-08-30 17:39:28,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:28,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:28,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:28,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:28,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:28,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:28,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:28,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:39:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:28,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-30 17:39:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:28,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-08-30 17:39:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:28,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-08-30 17:39:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 2113 trivial. 0 not checked. [2021-08-30 17:39:28,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:28,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32026083] [2021-08-30 17:39:28,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32026083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:28,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043663755] [2021-08-30 17:39:28,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 17:39:28,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:28,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:28,306 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:28,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-30 17:39:28,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-30 17:39:28,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:28,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 17:39:28,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 2265 trivial. 0 not checked. [2021-08-30 17:39:28,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:28,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-30 17:39:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2289 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2265 trivial. 0 not checked. [2021-08-30 17:39:29,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043663755] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:29,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:29,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 24 [2021-08-30 17:39:29,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124748305] [2021-08-30 17:39:29,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-30 17:39:29,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:29,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-30 17:39:29,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-08-30 17:39:29,262 INFO L87 Difference]: Start difference. First operand 233 states and 251 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 23 states have internal predecessors, (94), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-08-30 17:39:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:29,848 INFO L93 Difference]: Finished difference Result 271 states and 291 transitions. [2021-08-30 17:39:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 17:39:29,849 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 23 states have internal predecessors, (94), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 237 [2021-08-30 17:39:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:29,850 INFO L225 Difference]: With dead ends: 271 [2021-08-30 17:39:29,850 INFO L226 Difference]: Without dead ends: 271 [2021-08-30 17:39:29,851 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 416.71ms TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 17:39:29,851 INFO L928 BasicCegarLoop]: 17 mSDtfsCounter, 559 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.65ms SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 325.36ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:29,851 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 43 Invalid, 573 Unknown, 0 Unchecked, 2.65ms Time], IncrementalHoareTripleChecker [235 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 325.36ms Time] [2021-08-30 17:39:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-30 17:39:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 252. [2021-08-30 17:39:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 231 states have (on average 1.0649350649350648) internal successors, (246), 232 states have internal predecessors, (246), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-08-30 17:39:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 267 transitions. [2021-08-30 17:39:29,857 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 267 transitions. Word has length 237 [2021-08-30 17:39:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:29,858 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 267 transitions. [2021-08-30 17:39:29,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 23 states have internal predecessors, (94), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-08-30 17:39:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 267 transitions. [2021-08-30 17:39:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-08-30 17:39:29,860 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:29,860 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:29,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:30,070 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 [2021-08-30 17:39:30,071 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:30,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:30,071 INFO L82 PathProgramCache]: Analyzing trace with hash -882467750, now seen corresponding path program 1 times [2021-08-30 17:39:30,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:30,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019651567] [2021-08-30 17:39:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:30,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:39:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-30 17:39:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-08-30 17:39:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-08-30 17:39:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2021-08-30 17:39:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3495 backedges. 903 proven. 315 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-08-30 17:39:30,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:30,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019651567] [2021-08-30 17:39:30,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019651567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:30,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86154085] [2021-08-30 17:39:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:30,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:30,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:30,369 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:30,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-30 17:39:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:30,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-30 17:39:30,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3495 backedges. 1866 proven. 81 refuted. 0 times theorem prover too weak. 1548 trivial. 0 not checked. [2021-08-30 17:39:31,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3495 backedges. 941 proven. 277 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2021-08-30 17:39:31,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86154085] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:31,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:31,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 34 [2021-08-30 17:39:31,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965951846] [2021-08-30 17:39:31,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-30 17:39:31,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:31,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-30 17:39:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=874, Unknown=0, NotChecked=0, Total=1122 [2021-08-30 17:39:31,865 INFO L87 Difference]: Start difference. First operand 252 states and 267 transitions. Second operand has 34 states, 34 states have (on average 5.176470588235294) internal successors, (176), 33 states have internal predecessors, (176), 11 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-08-30 17:39:32,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:32,574 INFO L93 Difference]: Finished difference Result 348 states and 373 transitions. [2021-08-30 17:39:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-30 17:39:32,576 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.176470588235294) internal successors, (176), 33 states have internal predecessors, (176), 11 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 311 [2021-08-30 17:39:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:32,578 INFO L225 Difference]: With dead ends: 348 [2021-08-30 17:39:32,578 INFO L226 Difference]: Without dead ends: 348 [2021-08-30 17:39:32,579 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 624 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 572.47ms TimeCoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2021-08-30 17:39:32,579 INFO L928 BasicCegarLoop]: 12 mSDtfsCounter, 208 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 395.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.20ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 483.10ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:32,579 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 74 Invalid, 1246 Unknown, 0 Unchecked, 3.20ms Time], IncrementalHoareTripleChecker [43 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 483.10ms Time] [2021-08-30 17:39:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-30 17:39:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 260. [2021-08-30 17:39:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 238 states have (on average 1.0672268907563025) internal successors, (254), 240 states have internal predecessors, (254), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-08-30 17:39:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 276 transitions. [2021-08-30 17:39:32,586 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 276 transitions. Word has length 311 [2021-08-30 17:39:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:32,586 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 276 transitions. [2021-08-30 17:39:32,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.176470588235294) internal successors, (176), 33 states have internal predecessors, (176), 11 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-08-30 17:39:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 276 transitions. [2021-08-30 17:39:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-08-30 17:39:32,588 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:32,588 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:32,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:32,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:32,797 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash -437157984, now seen corresponding path program 2 times [2021-08-30 17:39:32,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:32,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740527552] [2021-08-30 17:39:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:32,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:39:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-30 17:39:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-08-30 17:39:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-08-30 17:39:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2021-08-30 17:39:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 3623 trivial. 0 not checked. [2021-08-30 17:39:32,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:32,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740527552] [2021-08-30 17:39:32,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740527552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:32,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93519950] [2021-08-30 17:39:32,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:39:32,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:32,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:32,993 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:33,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-30 17:39:33,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 17:39:33,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:33,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:33,102 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:33,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:33,245 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:33,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:33,474 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:33,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:33,723 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:33,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:34,079 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:34,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:34,499 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:34,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:34,919 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:34,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:35,419 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:35,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:35,973 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 17:39:35,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-08-30 17:39:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3848 trivial. 0 not checked. [2021-08-30 17:39:36,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:39:36,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93519950] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:36,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:39:36,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2021-08-30 17:39:36,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632864098] [2021-08-30 17:39:36,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:39:36,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:39:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-30 17:39:36,741 INFO L87 Difference]: Start difference. First operand 260 states and 276 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:36,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:36,788 INFO L93 Difference]: Finished difference Result 259 states and 275 transitions. [2021-08-30 17:39:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:39:36,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 321 [2021-08-30 17:39:36,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:36,791 INFO L225 Difference]: With dead ends: 259 [2021-08-30 17:39:36,791 INFO L226 Difference]: Without dead ends: 257 [2021-08-30 17:39:36,791 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 320 SyntacticMatches, 17 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 254.05ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-30 17:39:36,791 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.24ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 35.58ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:36,792 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.24ms Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 17 Unchecked, 35.58ms Time] [2021-08-30 17:39:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-30 17:39:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-08-30 17:39:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 236 states have (on average 1.055084745762712) internal successors, (249), 237 states have internal predecessors, (249), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-08-30 17:39:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 271 transitions. [2021-08-30 17:39:36,797 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 271 transitions. Word has length 321 [2021-08-30 17:39:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:36,798 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 271 transitions. [2021-08-30 17:39:36,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 271 transitions. [2021-08-30 17:39:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-08-30 17:39:36,800 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:36,800 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 12, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:36,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:37,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:37,001 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:37,001 INFO L82 PathProgramCache]: Analyzing trace with hash -316530400, now seen corresponding path program 4 times [2021-08-30 17:39:37,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:37,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091453119] [2021-08-30 17:39:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:37,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:37,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:37,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:37,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:37,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:37,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:37,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:39:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:37,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-30 17:39:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:37,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-08-30 17:39:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:37,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-08-30 17:39:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:37,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2021-08-30 17:39:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3937 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 3712 trivial. 0 not checked. [2021-08-30 17:39:37,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:37,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091453119] [2021-08-30 17:39:37,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091453119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:37,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869638957] [2021-08-30 17:39:37,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 17:39:37,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:37,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:37,197 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:37,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-30 17:39:37,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 17:39:37,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-30 17:39:37,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3937 backedges. 1277 proven. 352 refuted. 0 times theorem prover too weak. 2308 trivial. 0 not checked. [2021-08-30 17:39:38,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3937 backedges. 1278 proven. 351 refuted. 0 times theorem prover too weak. 2308 trivial. 0 not checked. [2021-08-30 17:39:38,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869638957] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:38,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:38,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 41 [2021-08-30 17:39:38,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189095538] [2021-08-30 17:39:38,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-30 17:39:38,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:38,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-30 17:39:38,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-08-30 17:39:38,948 INFO L87 Difference]: Start difference. First operand 257 states and 271 transitions. Second operand has 41 states, 41 states have (on average 4.829268292682927) internal successors, (198), 40 states have internal predecessors, (198), 17 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 18 states have call predecessors, (19), 17 states have call successors, (19) [2021-08-30 17:39:40,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:40,269 INFO L93 Difference]: Finished difference Result 389 states and 419 transitions. [2021-08-30 17:39:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-30 17:39:40,270 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.829268292682927) internal successors, (198), 40 states have internal predecessors, (198), 17 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 18 states have call predecessors, (19), 17 states have call successors, (19) Word has length 328 [2021-08-30 17:39:40,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:40,272 INFO L225 Difference]: With dead ends: 389 [2021-08-30 17:39:40,272 INFO L226 Difference]: Without dead ends: 389 [2021-08-30 17:39:40,273 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 967.00ms TimeCoverageRelationStatistics Valid=867, Invalid=4245, Unknown=0, NotChecked=0, Total=5112 [2021-08-30 17:39:40,273 INFO L928 BasicCegarLoop]: 12 mSDtfsCounter, 580 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 633.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.57ms SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 771.83ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:40,274 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 106 Invalid, 2010 Unknown, 0 Unchecked, 5.57ms Time], IncrementalHoareTripleChecker [168 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 771.83ms Time] [2021-08-30 17:39:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-08-30 17:39:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 308. [2021-08-30 17:39:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 285 states have (on average 1.0666666666666667) internal successors, (304), 286 states have internal predecessors, (304), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-08-30 17:39:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 328 transitions. [2021-08-30 17:39:40,281 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 328 transitions. Word has length 328 [2021-08-30 17:39:40,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:40,281 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 328 transitions. [2021-08-30 17:39:40,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.829268292682927) internal successors, (198), 40 states have internal predecessors, (198), 17 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 18 states have call predecessors, (19), 17 states have call successors, (19) [2021-08-30 17:39:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 328 transitions. [2021-08-30 17:39:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-08-30 17:39:40,284 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:40,284 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 12, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:40,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:40,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:40,493 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:40,493 INFO L82 PathProgramCache]: Analyzing trace with hash -545867965, now seen corresponding path program 5 times [2021-08-30 17:39:40,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:40,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270638278] [2021-08-30 17:39:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:40,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:39:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-30 17:39:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-08-30 17:39:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-08-30 17:39:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2021-08-30 17:39:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2021-08-30 17:39:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5917 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 5637 trivial. 0 not checked. [2021-08-30 17:39:40,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:40,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270638278] [2021-08-30 17:39:40,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270638278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:40,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915463290] [2021-08-30 17:39:40,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 17:39:40,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:40,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:40,713 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:40,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-30 17:39:41,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-30 17:39:41,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:41,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-30 17:39:41,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5917 backedges. 1814 proven. 447 refuted. 0 times theorem prover too weak. 3656 trivial. 0 not checked. [2021-08-30 17:39:41,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:39:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5917 backedges. 1815 proven. 446 refuted. 0 times theorem prover too weak. 3656 trivial. 0 not checked. [2021-08-30 17:39:42,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915463290] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:39:42,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:39:42,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24, 24] total 47 [2021-08-30 17:39:42,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816444483] [2021-08-30 17:39:42,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-30 17:39:42,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:42,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-30 17:39:42,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-08-30 17:39:42,883 INFO L87 Difference]: Start difference. First operand 308 states and 328 transitions. Second operand has 47 states, 47 states have (on average 4.659574468085107) internal successors, (219), 46 states have internal predecessors, (219), 19 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 20 states have call predecessors, (21), 19 states have call successors, (21) [2021-08-30 17:39:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:44,580 INFO L93 Difference]: Finished difference Result 479 states and 521 transitions. [2021-08-30 17:39:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-30 17:39:44,581 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.659574468085107) internal successors, (219), 46 states have internal predecessors, (219), 19 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 20 states have call predecessors, (21), 19 states have call successors, (21) Word has length 384 [2021-08-30 17:39:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:44,583 INFO L225 Difference]: With dead ends: 479 [2021-08-30 17:39:44,583 INFO L226 Difference]: Without dead ends: 479 [2021-08-30 17:39:44,584 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 861 GetRequests, 767 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 1462.58ms TimeCoverageRelationStatistics Valid=1619, Invalid=7501, Unknown=0, NotChecked=0, Total=9120 [2021-08-30 17:39:44,585 INFO L928 BasicCegarLoop]: 13 mSDtfsCounter, 839 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 595.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.38ms SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 728.52ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:44,585 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 113 Invalid, 1923 Unknown, 0 Unchecked, 5.38ms Time], IncrementalHoareTripleChecker [242 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 728.52ms Time] [2021-08-30 17:39:44,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-08-30 17:39:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 364. [2021-08-30 17:39:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 339 states have (on average 1.0766961651917404) internal successors, (365), 340 states have internal predecessors, (365), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-08-30 17:39:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 391 transitions. [2021-08-30 17:39:44,593 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 391 transitions. Word has length 384 [2021-08-30 17:39:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:44,593 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 391 transitions. [2021-08-30 17:39:44,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.659574468085107) internal successors, (219), 46 states have internal predecessors, (219), 19 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 20 states have call predecessors, (21), 19 states have call successors, (21) [2021-08-30 17:39:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 391 transitions. [2021-08-30 17:39:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-08-30 17:39:44,596 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:39:44,596 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:39:44,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:44,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-30 17:39:44,817 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-08-30 17:39:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:39:44,817 INFO L82 PathProgramCache]: Analyzing trace with hash 877218651, now seen corresponding path program 6 times [2021-08-30 17:39:44,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:39:44,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645850896] [2021-08-30 17:39:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:39:44,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:39:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:39:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-30 17:39:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-30 17:39:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 17:39:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-08-30 17:39:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-08-30 17:39:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-08-30 17:39:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-08-30 17:39:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-08-30 17:39:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2021-08-30 17:39:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2021-08-30 17:39:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2021-08-30 17:39:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:39:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8607 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 8266 trivial. 0 not checked. [2021-08-30 17:39:45,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:39:45,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645850896] [2021-08-30 17:39:45,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645850896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:39:45,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750188197] [2021-08-30 17:39:45,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 17:39:45,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:39:45,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:39:45,073 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:39:45,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-30 17:39:45,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-30 17:39:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:39:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:39:45,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:39:45,191 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:39:45,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-30 17:39:45,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-08-30 17:39:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8607 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 8565 trivial. 0 not checked. [2021-08-30 17:39:47,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:39:47,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750188197] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:39:47,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:39:47,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 20 [2021-08-30 17:39:47,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363453403] [2021-08-30 17:39:47,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:39:47,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:39:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:39:47,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-08-30 17:39:47,642 INFO L87 Difference]: Start difference. First operand 364 states and 391 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:47,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:39:47,646 INFO L93 Difference]: Finished difference Result 363 states and 390 transitions. [2021-08-30 17:39:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:39:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 445 [2021-08-30 17:39:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:39:47,652 INFO L225 Difference]: With dead ends: 363 [2021-08-30 17:39:47,652 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 17:39:47,652 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 443 SyntacticMatches, 21 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 314.12ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-08-30 17:39:47,653 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.13ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.78ms IncrementalHoareTripleChecker+Time [2021-08-30 17:39:47,653 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 38 Unknown, 0 Unchecked, 0.13ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 35 Unchecked, 1.78ms Time] [2021-08-30 17:39:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 17:39:47,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 17:39:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-30 17:39:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 17:39:47,654 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 445 [2021-08-30 17:39:47,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:39:47,654 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 17:39:47,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:39:47,654 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 17:39:47,654 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 17:39:47,657 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2021-08-30 17:39:47,657 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr1REQUIRES_VIOLATION (6 of 8 remaining) [2021-08-30 17:39:47,657 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr2REQUIRES_VIOLATION (5 of 8 remaining) [2021-08-30 17:39:47,657 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (4 of 8 remaining) [2021-08-30 17:39:47,657 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (3 of 8 remaining) [2021-08-30 17:39:47,657 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (2 of 8 remaining) [2021-08-30 17:39:47,658 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (1 of 8 remaining) [2021-08-30 17:39:47,658 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-08-30 17:39:47,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-30 17:39:47,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-30 17:39:47,876 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 17:39:47,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 05:39:47 BoogieIcfgContainer [2021-08-30 17:39:47,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 17:39:47,878 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 17:39:47,878 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 17:39:47,879 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 17:39:47,879 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:39:08" (3/4) ... [2021-08-30 17:39:47,881 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 17:39:47,884 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 17:39:47,884 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-08-30 17:39:47,885 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 17:39:47,887 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-08-30 17:39:47,888 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-30 17:39:47,888 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-08-30 17:39:47,888 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 17:39:47,911 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 17:39:47,911 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 17:39:47,912 INFO L158 Benchmark]: Toolchain (without parser) took 39582.96ms. Allocated memory was 67.1MB in the beginning and 255.9MB in the end (delta: 188.7MB). Free memory was 47.5MB in the beginning and 171.7MB in the end (delta: -124.2MB). Peak memory consumption was 64.2MB. Max. memory is 16.1GB. [2021-08-30 17:39:47,912 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory was 49.2MB in the beginning and 49.1MB in the end (delta: 48.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:39:47,912 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.20ms. Allocated memory is still 67.1MB. Free memory was 47.3MB in the beginning and 38.4MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-30 17:39:47,913 INFO L158 Benchmark]: Boogie Preprocessor took 72.01ms. Allocated memory is still 67.1MB. Free memory was 38.4MB in the beginning and 50.3MB in the end (delta: -11.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:39:47,913 INFO L158 Benchmark]: RCFGBuilder took 170.17ms. Allocated memory is still 67.1MB. Free memory was 50.3MB in the beginning and 40.8MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-30 17:39:47,913 INFO L158 Benchmark]: TraceAbstraction took 39137.33ms. Allocated memory was 67.1MB in the beginning and 255.9MB in the end (delta: 188.7MB). Free memory was 40.3MB in the beginning and 174.8MB in the end (delta: -134.5MB). Peak memory consumption was 55.0MB. Max. memory is 16.1GB. [2021-08-30 17:39:47,913 INFO L158 Benchmark]: Witness Printer took 33.19ms. Allocated memory is still 255.9MB. Free memory was 174.8MB in the beginning and 171.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 17:39:47,914 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 67.1MB. Free memory was 49.2MB in the beginning and 49.1MB in the end (delta: 48.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 164.20ms. Allocated memory is still 67.1MB. Free memory was 47.3MB in the beginning and 38.4MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.01ms. Allocated memory is still 67.1MB. Free memory was 38.4MB in the beginning and 50.3MB in the end (delta: -11.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 170.17ms. Allocated memory is still 67.1MB. Free memory was 50.3MB in the beginning and 40.8MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 39137.33ms. Allocated memory was 67.1MB in the beginning and 255.9MB in the end (delta: 188.7MB). Free memory was 40.3MB in the beginning and 174.8MB in the end (delta: -134.5MB). Peak memory consumption was 55.0MB. Max. memory is 16.1GB. * Witness Printer took 33.19ms. Allocated memory is still 255.9MB. Free memory was 174.8MB in the beginning and 171.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 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: 39095.78ms, OverallIterations: 26, TraceHistogramMax: 54, EmptinessCheckTime: 41.08ms, AutomataDifference: 9423.78ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 7.98ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4682 SdHoareTripleChecker+Valid, 5556.23ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4663 mSDsluCounter, 930 SdHoareTripleChecker+Invalid, 4475.72ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 205 IncrementalHoareTripleChecker+Unchecked, 2482 mSDsCounter, 1267 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10885 IncrementalHoareTripleChecker+Invalid, 12357 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1267 mSolverCounterUnsat, 190 mSDtfsCounter, 10885 mSolverCounterSat, 55.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5898 GetRequests, 5197 SyntacticMatches, 75 SemanticMatches, 626 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7168 ImplicationChecksByTransitivity, 7256.46ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=364occurred in iteration=25, InterpolantAutomatonStates: 377, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 161.74ms AutomataMinimizationTime, 26 MinimizatonAttempts, 635 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 335.11ms SsaConstructionTime, 1358.02ms SatisfiabilityAnalysisTime, 22427.32ms InterpolantComputationTime, 6289 NumberOfCodeBlocks, 5127 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 8320 ConstructedInterpolants, 855 QuantifiedInterpolants, 31167 SizeOfPredicates, 50 NumberOfNonLiveVariables, 6066 ConjunctsInSsa, 241 ConjunctsInUnsatCore, 63 InterpolantComputations, 10 PerfectInterpolantSequences, 77685/82022 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-30 17:39:47,946 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...