./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3a877d22 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/ArraysWithLenghtAtDeclaration_-write.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 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 14:02:58,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 14:02:58,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 14:02:58,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 14:02:58,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 14:02:58,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 14:02:58,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 14:02:58,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 14:02:58,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 14:02:58,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 14:02:58,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 14:02:58,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 14:02:58,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 14:02:58,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 14:02:58,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 14:02:58,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 14:02:58,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 14:02:58,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 14:02:58,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 14:02:58,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 14:02:58,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 14:02:58,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 14:02:58,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 14:02:58,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 14:02:58,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 14:02:58,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 14:02:58,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 14:02:58,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 14:02:58,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 14:02:58,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 14:02:58,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 14:02:58,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 14:02:58,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 14:02:58,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 14:02:58,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 14:02:58,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 14:02:58,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 14:02:58,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 14:02:58,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 14:02:58,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 14:02:58,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 14:02:58,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 14:02:58,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 14:02:58,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 14:02:58,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 14:02:58,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 14:02:58,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 14:02:58,489 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 14:02:58,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 14:02:58,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 14:02:58,489 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 14:02:58,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 14:02:58,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 14:02:58,491 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 14:02:58,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 14:02:58,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 14:02:58,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 14:02:58,491 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 14:02:58,491 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 14:02:58,491 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 14:02:58,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 14:02:58,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 14:02:58,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 14:02:58,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 14:02:58,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 14:02:58,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 14:02:58,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 14:02:58,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 14:02:58,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 14:02:58,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 14:02:58,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 14:02:58,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 14:02:58,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 14:02:58,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2021-12-15 14:02:58,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 14:02:58,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 14:02:58,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 14:02:58,732 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 14:02:58,733 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 14:02:58,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2021-12-15 14:02:58,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fd791cb2/6234aa1cac8849a8a807050e6bff0661/FLAG901b03a4d [2021-12-15 14:02:59,147 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 14:02:59,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2021-12-15 14:02:59,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fd791cb2/6234aa1cac8849a8a807050e6bff0661/FLAG901b03a4d [2021-12-15 14:02:59,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fd791cb2/6234aa1cac8849a8a807050e6bff0661 [2021-12-15 14:02:59,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 14:02:59,163 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 14:02:59,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 14:02:59,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 14:02:59,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 14:02:59,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ad988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59, skipping insertion in model container [2021-12-15 14:02:59,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 14:02:59,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 14:02:59,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 14:02:59,303 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 14:02:59,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 14:02:59,326 INFO L208 MainTranslator]: Completed translation [2021-12-15 14:02:59,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59 WrapperNode [2021-12-15 14:02:59,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 14:02:59,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 14:02:59,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 14:02:59,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 14:02:59,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,350 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2021-12-15 14:02:59,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 14:02:59,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 14:02:59,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 14:02:59,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 14:02:59,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 14:02:59,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 14:02:59,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 14:02:59,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 14:02:59,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59" (1/1) ... [2021-12-15 14:02:59,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 14:02:59,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:02:59,390 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) [2021-12-15 14:02:59,405 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 [2021-12-15 14:02:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 14:02:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 14:02:59,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 14:02:59,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 14:02:59,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 14:02:59,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 14:02:59,470 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 14:02:59,472 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 14:02:59,600 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 14:02:59,604 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 14:02:59,604 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-15 14:02:59,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 02:02:59 BoogieIcfgContainer [2021-12-15 14:02:59,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 14:02:59,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 14:02:59,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 14:02:59,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 14:02:59,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 02:02:59" (1/3) ... [2021-12-15 14:02:59,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c57f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 02:02:59, skipping insertion in model container [2021-12-15 14:02:59,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:02:59" (2/3) ... [2021-12-15 14:02:59,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c57f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 02:02:59, skipping insertion in model container [2021-12-15 14:02:59,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 02:02:59" (3/3) ... [2021-12-15 14:02:59,629 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2021-12-15 14:02:59,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 14:02:59,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-15 14:02:59,680 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 14:02:59,705 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, mAutomataTypeConcurrency=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 [2021-12-15 14:02:59,706 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-15 14:02:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 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) [2021-12-15 14:02:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-15 14:02:59,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:02:59,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-15 14:02:59,721 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:02:59,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:02:59,724 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-12-15 14:02:59,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:02:59,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237926790] [2021-12-15 14:02:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:02:59,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:02:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:02:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:02:59,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:02:59,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237926790] [2021-12-15 14:02:59,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237926790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:02:59,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:02:59,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 14:02:59,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163611457] [2021-12-15 14:02:59,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:02:59,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 14:02:59,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:02:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 14:02:59,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 14:02:59,916 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-15 14:02:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:02:59,961 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-15 14:02:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 14:02:59,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) Word has length 5 [2021-12-15 14:02:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:02:59,968 INFO L225 Difference]: With dead ends: 59 [2021-12-15 14:02:59,968 INFO L226 Difference]: Without dead ends: 55 [2021-12-15 14:02:59,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 14:02:59,974 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:02:59,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:02:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-15 14:03:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-12-15 14:03:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 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) [2021-12-15 14:03:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-15 14:03:00,004 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2021-12-15 14:03:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:00,004 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-15 14:03:00,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-12-15 14:03:00,005 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-15 14:03:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 14:03:00,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:00,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 14:03:00,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 14:03:00,006 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2021-12-15 14:03:00,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:00,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511615] [2021-12-15 14:03:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:00,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:00,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:00,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511615] [2021-12-15 14:03:00,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:03:00,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:03:00,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 14:03:00,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929584371] [2021-12-15 14:03:00,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:03:00,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 14:03:00,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:00,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 14:03:00,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 14:03:00,066 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-15 14:03:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:00,100 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-12-15 14:03:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 14:03:00,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) Word has length 6 [2021-12-15 14:03:00,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:00,101 INFO L225 Difference]: With dead ends: 58 [2021-12-15 14:03:00,101 INFO L226 Difference]: Without dead ends: 58 [2021-12-15 14:03:00,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 14:03:00,105 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:00,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:00,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-15 14:03:00,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-12-15 14:03:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 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) [2021-12-15 14:03:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-15 14:03:00,116 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-15 14:03:00,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:00,116 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-15 14:03:00,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-15 14:03:00,117 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-15 14:03:00,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 14:03:00,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:00,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 14:03:00,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 14:03:00,119 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:00,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:00,122 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2021-12-15 14:03:00,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:00,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835634464] [2021-12-15 14:03:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:00,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:00,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:00,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835634464] [2021-12-15 14:03:00,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835634464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:03:00,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:03:00,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 14:03:00,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130212675] [2021-12-15 14:03:00,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:03:00,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 14:03:00,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 14:03:00,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 14:03:00,185 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-15 14:03:00,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:00,226 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-12-15 14:03:00,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 14:03:00,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) Word has length 6 [2021-12-15 14:03:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:00,227 INFO L225 Difference]: With dead ends: 32 [2021-12-15 14:03:00,228 INFO L226 Difference]: Without dead ends: 32 [2021-12-15 14:03:00,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 14:03:00,229 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:00,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-15 14:03:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-15 14:03:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 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) [2021-12-15 14:03:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-15 14:03:00,235 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-12-15 14:03:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:00,236 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-15 14:03:00,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-15 14:03:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-15 14:03:00,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 14:03:00,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:00,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 14:03:00,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 14:03:00,248 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:00,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:00,249 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2021-12-15 14:03:00,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:00,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194813145] [2021-12-15 14:03:00,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:00,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:00,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:00,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194813145] [2021-12-15 14:03:00,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194813145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:03:00,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:03:00,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 14:03:00,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56140294] [2021-12-15 14:03:00,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:03:00,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 14:03:00,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:00,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 14:03:00,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 14:03:00,295 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-15 14:03:00,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:00,338 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-12-15 14:03:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 14:03:00,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) Word has length 6 [2021-12-15 14:03:00,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:00,339 INFO L225 Difference]: With dead ends: 55 [2021-12-15 14:03:00,339 INFO L226 Difference]: Without dead ends: 55 [2021-12-15 14:03:00,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 14:03:00,340 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:00,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:00,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-15 14:03:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-12-15 14:03:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 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) [2021-12-15 14:03:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-15 14:03:00,349 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-15 14:03:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:00,349 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-15 14:03:00,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-15 14:03:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-15 14:03:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 14:03:00,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:00,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:00,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 14:03:00,352 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:00,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-12-15 14:03:00,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:00,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861345017] [2021-12-15 14:03:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:00,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:00,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:00,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861345017] [2021-12-15 14:03:00,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861345017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:03:00,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:03:00,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 14:03:00,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571860815] [2021-12-15 14:03:00,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:03:00,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 14:03:00,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:00,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 14:03:00,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 14:03:00,377 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-15 14:03:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:00,386 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-12-15 14:03:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 14:03:00,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) Word has length 7 [2021-12-15 14:03:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:00,387 INFO L225 Difference]: With dead ends: 31 [2021-12-15 14:03:00,387 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 14:03:00,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 14:03:00,388 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:00,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 14:03:00,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-15 14:03:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 30 states have internal predecessors, (35), 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) [2021-12-15 14:03:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-15 14:03:00,390 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 7 [2021-12-15 14:03:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:00,391 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-15 14:03:00,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-15 14:03:00,391 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-15 14:03:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 14:03:00,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:00,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:00,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 14:03:00,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:00,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810360, now seen corresponding path program 1 times [2021-12-15 14:03:00,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:00,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772353446] [2021-12-15 14:03:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:00,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:00,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:00,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772353446] [2021-12-15 14:03:00,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772353446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:03:00,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:03:00,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 14:03:00,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532263249] [2021-12-15 14:03:00,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:03:00,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 14:03:00,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:00,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 14:03:00,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 14:03:00,428 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-15 14:03:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:00,460 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-12-15 14:03:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 14:03:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) Word has length 7 [2021-12-15 14:03:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:00,461 INFO L225 Difference]: With dead ends: 56 [2021-12-15 14:03:00,461 INFO L226 Difference]: Without dead ends: 56 [2021-12-15 14:03:00,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 14:03:00,462 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:00,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-15 14:03:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2021-12-15 14:03:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 31 states have internal predecessors, (36), 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) [2021-12-15 14:03:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-15 14:03:00,465 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 7 [2021-12-15 14:03:00,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:00,465 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-15 14:03:00,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-15 14:03:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-15 14:03:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 14:03:00,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:00,466 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:00,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 14:03:00,466 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:00,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:00,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2021-12-15 14:03:00,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:00,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390077102] [2021-12-15 14:03:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:00,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:00,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:00,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390077102] [2021-12-15 14:03:00,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390077102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:00,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739024708] [2021-12-15 14:03:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:00,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:00,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:00,494 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) [2021-12-15 14:03:00,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 14:03:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:00,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 14:03:00,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:00,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:00,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739024708] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:00,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:00,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-15 14:03:00,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649120781] [2021-12-15 14:03:00,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:00,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 14:03:00,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:00,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 14:03:00,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 14:03:00,605 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-12-15 14:03:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:00,653 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2021-12-15 14:03:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 14:03:00,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) Word has length 10 [2021-12-15 14:03:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:00,655 INFO L225 Difference]: With dead ends: 120 [2021-12-15 14:03:00,655 INFO L226 Difference]: Without dead ends: 120 [2021-12-15 14:03:00,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-15 14:03:00,655 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 131 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:00,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 129 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-15 14:03:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 46. [2021-12-15 14:03:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 45 states have internal predecessors, (55), 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) [2021-12-15 14:03:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-15 14:03:00,659 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2021-12-15 14:03:00,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:00,659 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-15 14:03:00,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-12-15 14:03:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-15 14:03:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 14:03:00,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:00,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:00,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 14:03:00,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:00,879 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:00,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2021-12-15 14:03:00,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:00,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834194189] [2021-12-15 14:03:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:00,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 14:03:00,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:00,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834194189] [2021-12-15 14:03:00,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834194189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:03:00,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:03:00,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 14:03:00,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82781698] [2021-12-15 14:03:00,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:03:00,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 14:03:00,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:00,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 14:03:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 14:03:00,928 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-15 14:03:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:00,971 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-12-15 14:03:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 14:03:00,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) Word has length 11 [2021-12-15 14:03:00,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:00,972 INFO L225 Difference]: With dead ends: 63 [2021-12-15 14:03:00,972 INFO L226 Difference]: Without dead ends: 63 [2021-12-15 14:03:00,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 14:03:00,972 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:00,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 42 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-15 14:03:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-12-15 14:03:00,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 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) [2021-12-15 14:03:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-15 14:03:00,975 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 11 [2021-12-15 14:03:00,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:00,975 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-15 14:03:00,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-15 14:03:00,976 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-15 14:03:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 14:03:00,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:00,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:00,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 14:03:00,976 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:00,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088609, now seen corresponding path program 1 times [2021-12-15 14:03:00,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:00,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336087431] [2021-12-15 14:03:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:00,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:01,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:01,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336087431] [2021-12-15 14:03:01,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336087431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:01,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728532246] [2021-12-15 14:03:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:01,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:01,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:01,030 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) [2021-12-15 14:03:01,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 14:03:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:01,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 14:03:01,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:01,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:01,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728532246] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:01,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:01,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-15 14:03:01,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856410510] [2021-12-15 14:03:01,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:01,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 14:03:01,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:01,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 14:03:01,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-15 14:03:01,160 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-12-15 14:03:01,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:01,261 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-12-15 14:03:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 14:03:01,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) Word has length 12 [2021-12-15 14:03:01,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:01,262 INFO L225 Difference]: With dead ends: 80 [2021-12-15 14:03:01,262 INFO L226 Difference]: Without dead ends: 80 [2021-12-15 14:03:01,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-15 14:03:01,263 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:01,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 55 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:03:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-15 14:03:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2021-12-15 14:03:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.225) internal successors, (49), 43 states have internal predecessors, (49), 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) [2021-12-15 14:03:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-12-15 14:03:01,270 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 12 [2021-12-15 14:03:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:01,270 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-12-15 14:03:01,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-12-15 14:03:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-12-15 14:03:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 14:03:01,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:01,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:01,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:01,487 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,SelfDestructingSolverStorable8 [2021-12-15 14:03:01,487 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:01,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:01,488 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 2 times [2021-12-15 14:03:01,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:01,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600336811] [2021-12-15 14:03:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:01,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 14:03:01,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:01,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600336811] [2021-12-15 14:03:01,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600336811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:03:01,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:03:01,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 14:03:01,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483886351] [2021-12-15 14:03:01,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:03:01,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 14:03:01,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:01,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 14:03:01,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 14:03:01,555 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-15 14:03:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:01,572 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-12-15 14:03:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 14:03:01,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) Word has length 17 [2021-12-15 14:03:01,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:01,573 INFO L225 Difference]: With dead ends: 72 [2021-12-15 14:03:01,573 INFO L226 Difference]: Without dead ends: 72 [2021-12-15 14:03:01,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 14:03:01,573 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:01,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 35 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:01,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-15 14:03:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-12-15 14:03:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.2) internal successors, (78), 68 states have internal predecessors, (78), 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) [2021-12-15 14:03:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-12-15 14:03:01,577 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 17 [2021-12-15 14:03:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:01,577 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-12-15 14:03:01,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-15 14:03:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-12-15 14:03:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 14:03:01,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:01,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:01,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 14:03:01,578 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:01,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:01,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2021-12-15 14:03:01,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:01,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323336351] [2021-12-15 14:03:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:01,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 14:03:01,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:01,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323336351] [2021-12-15 14:03:01,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323336351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:01,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261641419] [2021-12-15 14:03:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:01,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:01,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:01,650 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) [2021-12-15 14:03:01,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 14:03:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:01,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 14:03:01,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 14:03:01,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:01,838 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 [2021-12-15 14:03:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 14:03:01,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261641419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:01,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:01,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-15 14:03:01,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862699531] [2021-12-15 14:03:01,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:01,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 14:03:01,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:01,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 14:03:01,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-15 14:03:01,899 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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) [2021-12-15 14:03:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:01,963 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-12-15 14:03:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 14:03:01,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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) Word has length 23 [2021-12-15 14:03:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:01,964 INFO L225 Difference]: With dead ends: 76 [2021-12-15 14:03:01,964 INFO L226 Difference]: Without dead ends: 76 [2021-12-15 14:03:01,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 14:03:01,965 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:01,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 49 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-15 14:03:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-12-15 14:03:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.196969696969697) internal successors, (79), 69 states have internal predecessors, (79), 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) [2021-12-15 14:03:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-12-15 14:03:01,968 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 23 [2021-12-15 14:03:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:01,968 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-12-15 14:03:01,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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) [2021-12-15 14:03:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-12-15 14:03:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 14:03:01,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:01,969 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2021-12-15 14:03:01,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:02,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:02,188 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:02,188 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2021-12-15 14:03:02,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:02,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816097501] [2021-12-15 14:03:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:02,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 14:03:02,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:02,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816097501] [2021-12-15 14:03:02,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816097501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:02,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831783243] [2021-12-15 14:03:02,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 14:03:02,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:02,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:02,270 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) [2021-12-15 14:03:02,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 14:03:02,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 14:03:02,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 14:03:02,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 14:03:02,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:03:02,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831783243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:03:02,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 14:03:02,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-15 14:03:02,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979535885] [2021-12-15 14:03:02,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:03:02,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 14:03:02,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:02,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 14:03:02,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 14:03:02,421 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-12-15 14:03:02,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:02,477 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-12-15 14:03:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 14:03:02,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) Word has length 25 [2021-12-15 14:03:02,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:02,479 INFO L225 Difference]: With dead ends: 84 [2021-12-15 14:03:02,479 INFO L226 Difference]: Without dead ends: 84 [2021-12-15 14:03:02,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-15 14:03:02,479 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:02,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 56 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-15 14:03:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 59. [2021-12-15 14:03:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 58 states have internal predecessors, (64), 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) [2021-12-15 14:03:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-12-15 14:03:02,482 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 25 [2021-12-15 14:03:02,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:02,483 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-12-15 14:03:02,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-12-15 14:03:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-12-15 14:03:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 14:03:02,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:02,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:02,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 14:03:02,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:02,700 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:02,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2021-12-15 14:03:02,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:02,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468806037] [2021-12-15 14:03:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:02,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 14:03:02,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:02,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468806037] [2021-12-15 14:03:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468806037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:02,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366427185] [2021-12-15 14:03:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:02,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:02,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:02,794 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) [2021-12-15 14:03:02,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 14:03:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:02,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 14:03:02,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 14:03:03,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:03:03,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366427185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:03:03,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 14:03:03,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 14:03:03,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369361673] [2021-12-15 14:03:03,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:03:03,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 14:03:03,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 14:03:03,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 14:03:03,022 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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) [2021-12-15 14:03:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:03,023 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-12-15 14:03:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 14:03:03,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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) Word has length 26 [2021-12-15 14:03:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:03,024 INFO L225 Difference]: With dead ends: 60 [2021-12-15 14:03:03,024 INFO L226 Difference]: Without dead ends: 58 [2021-12-15 14:03:03,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 14:03:03,025 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:03,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 37 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-15 14:03:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-15 14:03:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-15 14:03:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 57 states have internal predecessors, (62), 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) [2021-12-15 14:03:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-12-15 14:03:03,027 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 26 [2021-12-15 14:03:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:03,027 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-12-15 14:03:03,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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) [2021-12-15 14:03:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-12-15 14:03:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 14:03:03,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:03,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:03,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:03,243 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,SelfDestructingSolverStorable12 [2021-12-15 14:03:03,244 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:03,244 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2021-12-15 14:03:03,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:03,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966738413] [2021-12-15 14:03:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:03,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 14:03:03,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:03,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966738413] [2021-12-15 14:03:03,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966738413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:03,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034287055] [2021-12-15 14:03:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:03,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:03,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:03,311 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) [2021-12-15 14:03:03,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 14:03:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:03,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 14:03:03,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:03,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 14:03:03,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 14:03:03,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 14:03:03,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-15 14:03:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:03,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:03,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 12 [2021-12-15 14:03:03,612 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 26 treesize of output 24 [2021-12-15 14:03:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:03:03,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034287055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:03,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:03,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2021-12-15 14:03:03,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313458980] [2021-12-15 14:03:03,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:03,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 14:03:03,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:03,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 14:03:03,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-12-15 14:03:03,734 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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) [2021-12-15 14:03:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:03,920 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-12-15 14:03:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 14:03:03,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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) Word has length 27 [2021-12-15 14:03:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:03,921 INFO L225 Difference]: With dead ends: 97 [2021-12-15 14:03:03,921 INFO L226 Difference]: Without dead ends: 97 [2021-12-15 14:03:03,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2021-12-15 14:03:03,922 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:03,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 131 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:03:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-15 14:03:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2021-12-15 14:03:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 63 states have internal predecessors, (68), 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) [2021-12-15 14:03:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-12-15 14:03:03,924 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 27 [2021-12-15 14:03:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:03,924 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-12-15 14:03:03,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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) [2021-12-15 14:03:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-12-15 14:03:03,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 14:03:03,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:03,925 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:03,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-15 14:03:04,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:04,136 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:04,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:04,136 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2021-12-15 14:03:04,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:04,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661271593] [2021-12-15 14:03:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:04,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 14:03:04,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:04,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661271593] [2021-12-15 14:03:04,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661271593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:04,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089303373] [2021-12-15 14:03:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:04,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:04,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:04,208 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) [2021-12-15 14:03:04,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 14:03:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:04,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 14:03:04,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 14:03:04,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 14:03:04,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089303373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:04,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:04,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-12-15 14:03:04,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281281526] [2021-12-15 14:03:04,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:04,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 14:03:04,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 14:03:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-15 14:03:04,386 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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) [2021-12-15 14:03:04,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:04,498 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-12-15 14:03:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 14:03:04,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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) Word has length 34 [2021-12-15 14:03:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:04,499 INFO L225 Difference]: With dead ends: 64 [2021-12-15 14:03:04,499 INFO L226 Difference]: Without dead ends: 64 [2021-12-15 14:03:04,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-12-15 14:03:04,499 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:04,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:03:04,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-15 14:03:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-15 14:03:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 63 states have internal predecessors, (67), 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) [2021-12-15 14:03:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-12-15 14:03:04,502 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 34 [2021-12-15 14:03:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:04,502 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-12-15 14:03:04,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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) [2021-12-15 14:03:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-12-15 14:03:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 14:03:04,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:04,503 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:04,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 14:03:04,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:04,716 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:04,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:04,716 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2021-12-15 14:03:04,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:04,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013006852] [2021-12-15 14:03:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:04,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 14:03:04,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:04,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013006852] [2021-12-15 14:03:04,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013006852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:04,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838243054] [2021-12-15 14:03:04,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 14:03:04,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:04,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:04,780 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) [2021-12-15 14:03:04,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 14:03:04,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 14:03:04,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:04,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 14:03:04,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:04,853 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 14:03:04,853 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 15 [2021-12-15 14:03:04,862 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 [2021-12-15 14:03:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 14:03:05,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 14:03:05,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838243054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:05,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:05,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2021-12-15 14:03:05,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941776227] [2021-12-15 14:03:05,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:05,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 14:03:05,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:05,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 14:03:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-15 14:03:05,211 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 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) [2021-12-15 14:03:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:05,248 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2021-12-15 14:03:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 14:03:05,249 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 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) Word has length 39 [2021-12-15 14:03:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:05,249 INFO L225 Difference]: With dead ends: 150 [2021-12-15 14:03:05,249 INFO L226 Difference]: Without dead ends: 150 [2021-12-15 14:03:05,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-15 14:03:05,250 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:05,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 75 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-15 14:03:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2021-12-15 14:03:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.127659574468085) internal successors, (159), 144 states have internal predecessors, (159), 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) [2021-12-15 14:03:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 159 transitions. [2021-12-15 14:03:05,253 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 159 transitions. Word has length 39 [2021-12-15 14:03:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:05,253 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 159 transitions. [2021-12-15 14:03:05,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 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) [2021-12-15 14:03:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 159 transitions. [2021-12-15 14:03:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 14:03:05,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:05,254 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:05,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:05,463 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,SelfDestructingSolverStorable15 [2021-12-15 14:03:05,463 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:05,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2021-12-15 14:03:05,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:05,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684442042] [2021-12-15 14:03:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:05,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 14:03:05,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:05,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684442042] [2021-12-15 14:03:05,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684442042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:05,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798975068] [2021-12-15 14:03:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:05,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:05,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:05,545 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) [2021-12-15 14:03:05,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 14:03:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:05,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 14:03:05,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 14:03:05,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 14:03:05,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798975068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:05,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:05,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2021-12-15 14:03:05,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351348551] [2021-12-15 14:03:05,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:05,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 14:03:05,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:05,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 14:03:05,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-15 14:03:05,740 INFO L87 Difference]: Start difference. First operand 145 states and 159 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) [2021-12-15 14:03:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:05,889 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2021-12-15 14:03:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 14:03:05,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) Word has length 42 [2021-12-15 14:03:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:05,890 INFO L225 Difference]: With dead ends: 161 [2021-12-15 14:03:05,890 INFO L226 Difference]: Without dead ends: 161 [2021-12-15 14:03:05,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-12-15 14:03:05,891 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 313 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:05,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 57 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:03:05,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-15 14:03:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 139. [2021-12-15 14:03:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 138 states have internal predecessors, (150), 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) [2021-12-15 14:03:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2021-12-15 14:03:05,894 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 42 [2021-12-15 14:03:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:05,894 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2021-12-15 14:03:05,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) [2021-12-15 14:03:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2021-12-15 14:03:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 14:03:05,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:05,895 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:05,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:06,103 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,SelfDestructingSolverStorable16 [2021-12-15 14:03:06,103 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:06,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:06,104 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2021-12-15 14:03:06,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:06,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440767678] [2021-12-15 14:03:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:06,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 14:03:06,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:06,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440767678] [2021-12-15 14:03:06,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440767678] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:06,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35275588] [2021-12-15 14:03:06,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 14:03:06,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:06,148 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) [2021-12-15 14:03:06,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 14:03:06,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 14:03:06,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 14:03:06,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 14:03:06,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:06,511 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 24 treesize of output 20 [2021-12-15 14:03:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 14:03:06,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35275588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:06,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:06,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2021-12-15 14:03:06,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648417108] [2021-12-15 14:03:06,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:06,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-15 14:03:06,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:06,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-15 14:03:06,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-15 14:03:06,651 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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) [2021-12-15 14:03:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:06,786 INFO L93 Difference]: Finished difference Result 148 states and 157 transitions. [2021-12-15 14:03:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 14:03:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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) Word has length 49 [2021-12-15 14:03:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:06,787 INFO L225 Difference]: With dead ends: 148 [2021-12-15 14:03:06,787 INFO L226 Difference]: Without dead ends: 148 [2021-12-15 14:03:06,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-15 14:03:06,787 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 194 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:06,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 128 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:03:06,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-15 14:03:06,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2021-12-15 14:03:06,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 139 states have (on average 1.1007194244604317) internal successors, (153), 142 states have internal predecessors, (153), 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) [2021-12-15 14:03:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2021-12-15 14:03:06,789 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 49 [2021-12-15 14:03:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:06,790 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2021-12-15 14:03:06,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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) [2021-12-15 14:03:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2021-12-15 14:03:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 14:03:06,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:06,790 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-15 14:03:06,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:07,007 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,SelfDestructingSolverStorable17 [2021-12-15 14:03:07,007 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2021-12-15 14:03:07,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:07,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644740911] [2021-12-15 14:03:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:07,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 14:03:07,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:07,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644740911] [2021-12-15 14:03:07,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644740911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:07,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002963672] [2021-12-15 14:03:07,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 14:03:07,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:07,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:07,092 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) [2021-12-15 14:03:07,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 14:03:07,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 14:03:07,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:07,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-15 14:03:07,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 14:03:07,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-15 14:03:07,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002963672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:07,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:07,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-15 14:03:07,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673192584] [2021-12-15 14:03:07,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:07,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 14:03:07,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 14:03:07,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-12-15 14:03:07,406 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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) [2021-12-15 14:03:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:07,723 INFO L93 Difference]: Finished difference Result 196 states and 205 transitions. [2021-12-15 14:03:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 14:03:07,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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) Word has length 64 [2021-12-15 14:03:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:07,724 INFO L225 Difference]: With dead ends: 196 [2021-12-15 14:03:07,724 INFO L226 Difference]: Without dead ends: 196 [2021-12-15 14:03:07,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 14:03:07,725 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 259 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:07,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 112 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 14:03:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-15 14:03:07,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2021-12-15 14:03:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.0869565217391304) internal successors, (150), 141 states have internal predecessors, (150), 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) [2021-12-15 14:03:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 150 transitions. [2021-12-15 14:03:07,727 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 150 transitions. Word has length 64 [2021-12-15 14:03:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:07,728 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 150 transitions. [2021-12-15 14:03:07,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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) [2021-12-15 14:03:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 150 transitions. [2021-12-15 14:03:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-15 14:03:07,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:07,728 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-15 14:03:07,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:07,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:07,939 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:07,940 INFO L85 PathProgramCache]: Analyzing trace with hash -867962629, now seen corresponding path program 3 times [2021-12-15 14:03:07,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:07,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900649192] [2021-12-15 14:03:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:07,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-15 14:03:08,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:08,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900649192] [2021-12-15 14:03:08,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900649192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:08,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149250390] [2021-12-15 14:03:08,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 14:03:08,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:08,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:08,018 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) [2021-12-15 14:03:08,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 14:03:08,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-15 14:03:08,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:08,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 14:03:08,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:08,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 14:03:08,074 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 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 14:03:08,076 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 [2021-12-15 14:03:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-15 14:03:08,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:03:08,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149250390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:03:08,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 14:03:08,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-12-15 14:03:08,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053652440] [2021-12-15 14:03:08,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:03:08,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 14:03:08,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 14:03:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-15 14:03:08,411 INFO L87 Difference]: Start difference. First operand 142 states and 150 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-12-15 14:03:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:08,451 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2021-12-15 14:03:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 14:03:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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) Word has length 75 [2021-12-15 14:03:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:08,452 INFO L225 Difference]: With dead ends: 140 [2021-12-15 14:03:08,452 INFO L226 Difference]: Without dead ends: 140 [2021-12-15 14:03:08,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-15 14:03:08,452 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:08,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 41 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:03:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-15 14:03:08,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2021-12-15 14:03:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.0560747663551402) internal successors, (113), 108 states have internal predecessors, (113), 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) [2021-12-15 14:03:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2021-12-15 14:03:08,454 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 75 [2021-12-15 14:03:08,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:08,455 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2021-12-15 14:03:08,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-12-15 14:03:08,455 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2021-12-15 14:03:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-15 14:03:08,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:08,455 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:08,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:08,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:08,663 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:08,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1660735401, now seen corresponding path program 1 times [2021-12-15 14:03:08,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:08,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167299733] [2021-12-15 14:03:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:08,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 14:03:08,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:08,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167299733] [2021-12-15 14:03:08,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167299733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:08,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203376370] [2021-12-15 14:03:08,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:08,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:08,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:08,760 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) [2021-12-15 14:03:08,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 14:03:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:08,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 14:03:08,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 14:03:08,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 14:03:09,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203376370] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:09,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:09,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2021-12-15 14:03:09,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037202073] [2021-12-15 14:03:09,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:09,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-15 14:03:09,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-15 14:03:09,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-15 14:03:09,111 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2021-12-15 14:03:09,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:09,276 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2021-12-15 14:03:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 14:03:09,276 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) Word has length 80 [2021-12-15 14:03:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:09,277 INFO L225 Difference]: With dead ends: 112 [2021-12-15 14:03:09,277 INFO L226 Difference]: Without dead ends: 112 [2021-12-15 14:03:09,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-15 14:03:09,277 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:09,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 85 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:03:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-15 14:03:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-12-15 14:03:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 states have internal predecessors, (111), 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) [2021-12-15 14:03:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2021-12-15 14:03:09,279 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 80 [2021-12-15 14:03:09,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:09,279 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2021-12-15 14:03:09,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 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) [2021-12-15 14:03:09,280 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2021-12-15 14:03:09,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-15 14:03:09,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:09,280 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:03:09,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:09,480 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,SelfDestructingSolverStorable20 [2021-12-15 14:03:09,480 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:09,481 INFO L85 PathProgramCache]: Analyzing trace with hash 283151040, now seen corresponding path program 2 times [2021-12-15 14:03:09,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:09,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357848273] [2021-12-15 14:03:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:09,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-15 14:03:09,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:09,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357848273] [2021-12-15 14:03:09,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357848273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:09,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832491249] [2021-12-15 14:03:09,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 14:03:09,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:09,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:09,584 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) [2021-12-15 14:03:09,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 14:03:09,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-15 14:03:09,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:09,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 14:03:09,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-12-15 14:03:10,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:03:10,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832491249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:03:10,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 14:03:10,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 14:03:10,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695628480] [2021-12-15 14:03:10,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:03:10,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 14:03:10,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 14:03:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 14:03:10,216 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-12-15 14:03:10,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:10,218 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-12-15 14:03:10,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 14:03:10,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) Word has length 85 [2021-12-15 14:03:10,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:10,219 INFO L225 Difference]: With dead ends: 108 [2021-12-15 14:03:10,219 INFO L226 Difference]: Without dead ends: 92 [2021-12-15 14:03:10,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 14:03:10,220 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:10,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-12-15 14:03:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-15 14:03:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-15 14:03:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 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) [2021-12-15 14:03:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-12-15 14:03:10,221 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 85 [2021-12-15 14:03:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:10,221 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-12-15 14:03:10,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-12-15 14:03:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-12-15 14:03:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-15 14:03:10,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:10,222 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-12-15 14:03:10,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:10,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:10,441 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2021-12-15 14:03:10,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:10,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553448328] [2021-12-15 14:03:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:10,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-15 14:03:10,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:10,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553448328] [2021-12-15 14:03:10,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553448328] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:10,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015227086] [2021-12-15 14:03:10,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 14:03:10,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:10,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:10,500 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) [2021-12-15 14:03:10,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 14:03:10,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 14:03:10,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:10,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 14:03:10,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-15 14:03:10,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-15 14:03:10,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015227086] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:10,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:10,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2021-12-15 14:03:10,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545027313] [2021-12-15 14:03:10,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:10,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 14:03:10,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 14:03:10,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-12-15 14:03:10,875 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 states have internal predecessors, (83), 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) [2021-12-15 14:03:11,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:11,030 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2021-12-15 14:03:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 14:03:11,030 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 states have internal predecessors, (83), 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) Word has length 91 [2021-12-15 14:03:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:11,031 INFO L225 Difference]: With dead ends: 158 [2021-12-15 14:03:11,031 INFO L226 Difference]: Without dead ends: 158 [2021-12-15 14:03:11,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-12-15 14:03:11,032 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 207 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:11,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 107 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:03:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-15 14:03:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 122. [2021-12-15 14:03:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 121 states have internal predecessors, (129), 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) [2021-12-15 14:03:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2021-12-15 14:03:11,034 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 91 [2021-12-15 14:03:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:11,034 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2021-12-15 14:03:11,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 states have internal predecessors, (83), 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) [2021-12-15 14:03:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2021-12-15 14:03:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-15 14:03:11,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:11,034 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-12-15 14:03:11,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-15 14:03:11,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:11,252 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:11,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:11,252 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2021-12-15 14:03:11,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:11,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605449883] [2021-12-15 14:03:11,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:11,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 65 proven. 793 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-15 14:03:11,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:11,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605449883] [2021-12-15 14:03:11,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605449883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:11,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625931435] [2021-12-15 14:03:11,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 14:03:11,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:11,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:11,379 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) [2021-12-15 14:03:11,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 14:03:11,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 14:03:11,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:11,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 14:03:11,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-15 14:03:11,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-15 14:03:12,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625931435] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:12,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:12,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 34 [2021-12-15 14:03:12,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713390782] [2021-12-15 14:03:12,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:12,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 14:03:12,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:12,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 14:03:12,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=794, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 14:03:12,222 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 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) [2021-12-15 14:03:13,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:13,200 INFO L93 Difference]: Finished difference Result 363 states and 389 transitions. [2021-12-15 14:03:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-15 14:03:13,201 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 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) Word has length 121 [2021-12-15 14:03:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:13,202 INFO L225 Difference]: With dead ends: 363 [2021-12-15 14:03:13,202 INFO L226 Difference]: Without dead ends: 363 [2021-12-15 14:03:13,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2612, Invalid=6318, Unknown=0, NotChecked=0, Total=8930 [2021-12-15 14:03:13,205 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 262 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:13,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 82 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 14:03:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-15 14:03:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2021-12-15 14:03:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0769230769230769) internal successors, (378), 351 states have internal predecessors, (378), 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) [2021-12-15 14:03:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 378 transitions. [2021-12-15 14:03:13,215 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 378 transitions. Word has length 121 [2021-12-15 14:03:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:13,215 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 378 transitions. [2021-12-15 14:03:13,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 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) [2021-12-15 14:03:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 378 transitions. [2021-12-15 14:03:13,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-15 14:03:13,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:13,220 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-15 14:03:13,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:13,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-15 14:03:13,433 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:13,434 INFO L85 PathProgramCache]: Analyzing trace with hash -303332105, now seen corresponding path program 5 times [2021-12-15 14:03:13,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:13,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509065559] [2021-12-15 14:03:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:13,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4307 backedges. 2063 proven. 334 refuted. 0 times theorem prover too weak. 1910 trivial. 0 not checked. [2021-12-15 14:03:13,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:13,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509065559] [2021-12-15 14:03:13,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509065559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:13,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995364263] [2021-12-15 14:03:13,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 14:03:13,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:13,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:13,592 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) [2021-12-15 14:03:13,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 14:03:13,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-15 14:03:13,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 14:03:13,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4307 backedges. 2165 proven. 249 refuted. 0 times theorem prover too weak. 1893 trivial. 0 not checked. [2021-12-15 14:03:14,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4307 backedges. 2220 proven. 194 refuted. 0 times theorem prover too weak. 1893 trivial. 0 not checked. [2021-12-15 14:03:14,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995364263] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:14,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:14,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 25 [2021-12-15 14:03:14,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928582413] [2021-12-15 14:03:14,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:14,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 14:03:14,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 14:03:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-12-15 14:03:14,598 INFO L87 Difference]: Start difference. First operand 352 states and 378 transitions. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 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) [2021-12-15 14:03:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:14,953 INFO L93 Difference]: Finished difference Result 352 states and 372 transitions. [2021-12-15 14:03:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 14:03:14,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 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) Word has length 256 [2021-12-15 14:03:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:14,960 INFO L225 Difference]: With dead ends: 352 [2021-12-15 14:03:14,960 INFO L226 Difference]: Without dead ends: 352 [2021-12-15 14:03:14,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-12-15 14:03:14,961 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 142 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:14,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 49 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 14:03:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-15 14:03:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-12-15 14:03:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0598290598290598) internal successors, (372), 351 states have internal predecessors, (372), 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) [2021-12-15 14:03:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 372 transitions. [2021-12-15 14:03:14,970 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 372 transitions. Word has length 256 [2021-12-15 14:03:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:14,970 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 372 transitions. [2021-12-15 14:03:14,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 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) [2021-12-15 14:03:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 372 transitions. [2021-12-15 14:03:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-12-15 14:03:14,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:14,972 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-15 14:03:14,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:15,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:15,190 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:15,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:15,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1597142136, now seen corresponding path program 6 times [2021-12-15 14:03:15,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:15,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277139268] [2021-12-15 14:03:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:15,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 2998 proven. 603 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2021-12-15 14:03:15,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:15,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277139268] [2021-12-15 14:03:15,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277139268] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:15,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386764626] [2021-12-15 14:03:15,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 14:03:15,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:15,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:15,346 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) [2021-12-15 14:03:15,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 14:03:15,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-15 14:03:15,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 14:03:15,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3158 proven. 443 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2021-12-15 14:03:15,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3158 proven. 443 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2021-12-15 14:03:16,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386764626] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:16,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:16,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2021-12-15 14:03:16,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884452478] [2021-12-15 14:03:16,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:16,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 14:03:16,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:16,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 14:03:16,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-12-15 14:03:16,333 INFO L87 Difference]: Start difference. First operand 352 states and 372 transitions. Second operand has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 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) [2021-12-15 14:03:16,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:16,650 INFO L93 Difference]: Finished difference Result 352 states and 367 transitions. [2021-12-15 14:03:16,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 14:03:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 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) Word has length 281 [2021-12-15 14:03:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:16,652 INFO L225 Difference]: With dead ends: 352 [2021-12-15 14:03:16,652 INFO L226 Difference]: Without dead ends: 352 [2021-12-15 14:03:16,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 14:03:16,653 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:16,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 87 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 14:03:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-15 14:03:16,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-12-15 14:03:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0455840455840455) internal successors, (367), 351 states have internal predecessors, (367), 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) [2021-12-15 14:03:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 367 transitions. [2021-12-15 14:03:16,657 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 367 transitions. Word has length 281 [2021-12-15 14:03:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:16,657 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 367 transitions. [2021-12-15 14:03:16,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.476190476190476) internal successors, (136), 21 states have internal predecessors, (136), 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) [2021-12-15 14:03:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 367 transitions. [2021-12-15 14:03:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-12-15 14:03:16,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:16,659 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-15 14:03:16,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:16,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:16,877 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:16,877 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 7 times [2021-12-15 14:03:16,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:16,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823939628] [2021-12-15 14:03:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:16,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 3902 proven. 971 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-12-15 14:03:17,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:17,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823939628] [2021-12-15 14:03:17,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823939628] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:17,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394087528] [2021-12-15 14:03:17,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 14:03:17,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:17,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:17,046 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) [2021-12-15 14:03:17,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 14:03:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 14:03:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-12-15 14:03:17,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-12-15 14:03:18,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394087528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:18,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:18,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2021-12-15 14:03:18,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137165801] [2021-12-15 14:03:18,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:18,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 14:03:18,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:18,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 14:03:18,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-12-15 14:03:18,212 INFO L87 Difference]: Start difference. First operand 352 states and 367 transitions. Second operand has 24 states, 24 states have (on average 6.583333333333333) internal successors, (158), 24 states have internal predecessors, (158), 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) [2021-12-15 14:03:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:18,640 INFO L93 Difference]: Finished difference Result 352 states and 363 transitions. [2021-12-15 14:03:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-15 14:03:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.583333333333333) internal successors, (158), 24 states have internal predecessors, (158), 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) Word has length 301 [2021-12-15 14:03:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:18,641 INFO L225 Difference]: With dead ends: 352 [2021-12-15 14:03:18,641 INFO L226 Difference]: Without dead ends: 352 [2021-12-15 14:03:18,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=681, Invalid=1971, Unknown=0, NotChecked=0, Total=2652 [2021-12-15 14:03:18,642 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 89 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:18,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 138 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 14:03:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-15 14:03:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-12-15 14:03:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0341880341880343) internal successors, (363), 351 states have internal predecessors, (363), 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) [2021-12-15 14:03:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 363 transitions. [2021-12-15 14:03:18,647 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 363 transitions. Word has length 301 [2021-12-15 14:03:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:18,647 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 363 transitions. [2021-12-15 14:03:18,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.583333333333333) internal successors, (158), 24 states have internal predecessors, (158), 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) [2021-12-15 14:03:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 363 transitions. [2021-12-15 14:03:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-12-15 14:03:18,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:18,649 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-15 14:03:18,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:18,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:18,883 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:18,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 8 times [2021-12-15 14:03:18,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:18,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961411256] [2021-12-15 14:03:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:18,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4599 proven. 1453 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2021-12-15 14:03:19,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:19,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961411256] [2021-12-15 14:03:19,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961411256] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:19,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888655012] [2021-12-15 14:03:19,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 14:03:19,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:19,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:19,241 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) [2021-12-15 14:03:19,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-15 14:03:19,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 14:03:19,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 14:03:19,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2021-12-15 14:03:19,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2021-12-15 14:03:20,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888655012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:20,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:20,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2021-12-15 14:03:20,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212006215] [2021-12-15 14:03:20,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:20,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 14:03:20,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:20,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 14:03:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-12-15 14:03:20,418 INFO L87 Difference]: Start difference. First operand 352 states and 363 transitions. Second operand has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 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) [2021-12-15 14:03:21,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:21,054 INFO L93 Difference]: Finished difference Result 352 states and 360 transitions. [2021-12-15 14:03:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-15 14:03:21,054 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 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) Word has length 316 [2021-12-15 14:03:21,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:21,055 INFO L225 Difference]: With dead ends: 352 [2021-12-15 14:03:21,055 INFO L226 Difference]: Without dead ends: 352 [2021-12-15 14:03:21,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1009, Invalid=2897, Unknown=0, NotChecked=0, Total=3906 [2021-12-15 14:03:21,057 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 98 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:21,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 221 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 14:03:21,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-15 14:03:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-12-15 14:03:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0256410256410255) internal successors, (360), 351 states have internal predecessors, (360), 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) [2021-12-15 14:03:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 360 transitions. [2021-12-15 14:03:21,062 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 360 transitions. Word has length 316 [2021-12-15 14:03:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:21,063 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 360 transitions. [2021-12-15 14:03:21,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 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) [2021-12-15 14:03:21,063 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 360 transitions. [2021-12-15 14:03:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-15 14:03:21,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:21,065 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-15 14:03:21,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:21,282 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,SelfDestructingSolverStorable27 [2021-12-15 14:03:21,282 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash -25370281, now seen corresponding path program 9 times [2021-12-15 14:03:21,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:21,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605465990] [2021-12-15 14:03:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:21,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 4868 proven. 2064 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2021-12-15 14:03:21,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605465990] [2021-12-15 14:03:21,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605465990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959200066] [2021-12-15 14:03:21,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 14:03:21,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:21,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:21,488 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) [2021-12-15 14:03:21,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-15 14:03:21,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-15 14:03:21,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 14:03:21,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 2324 proven. 245 refuted. 0 times theorem prover too weak. 5063 trivial. 0 not checked. [2021-12-15 14:03:22,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 2324 proven. 245 refuted. 0 times theorem prover too weak. 5063 trivial. 0 not checked. [2021-12-15 14:03:22,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959200066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:22,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:22,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 43 [2021-12-15 14:03:22,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112429953] [2021-12-15 14:03:22,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:22,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-15 14:03:22,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:22,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-15 14:03:22,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1427, Unknown=0, NotChecked=0, Total=1806 [2021-12-15 14:03:22,686 INFO L87 Difference]: Start difference. First operand 352 states and 360 transitions. Second operand has 43 states, 43 states have (on average 6.023255813953488) internal successors, (259), 43 states have internal predecessors, (259), 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) [2021-12-15 14:03:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:24,965 INFO L93 Difference]: Finished difference Result 508 states and 526 transitions. [2021-12-15 14:03:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-15 14:03:24,965 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.023255813953488) internal successors, (259), 43 states have internal predecessors, (259), 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) Word has length 326 [2021-12-15 14:03:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:24,967 INFO L225 Difference]: With dead ends: 508 [2021-12-15 14:03:24,967 INFO L226 Difference]: Without dead ends: 508 [2021-12-15 14:03:24,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4714 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3922, Invalid=13900, Unknown=0, NotChecked=0, Total=17822 [2021-12-15 14:03:24,970 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 845 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:24,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 181 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 14:03:24,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-12-15 14:03:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 412. [2021-12-15 14:03:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.0462287104622872) internal successors, (430), 411 states have internal predecessors, (430), 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) [2021-12-15 14:03:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 430 transitions. [2021-12-15 14:03:24,983 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 430 transitions. Word has length 326 [2021-12-15 14:03:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:24,984 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 430 transitions. [2021-12-15 14:03:24,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.023255813953488) internal successors, (259), 43 states have internal predecessors, (259), 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) [2021-12-15 14:03:24,984 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 430 transitions. [2021-12-15 14:03:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-12-15 14:03:24,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:24,986 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 66, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2021-12-15 14:03:25,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:25,204 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,SelfDestructingSolverStorable28 [2021-12-15 14:03:25,204 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash -439414264, now seen corresponding path program 10 times [2021-12-15 14:03:25,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:25,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663013229] [2021-12-15 14:03:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:25,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11597 backedges. 282 proven. 10317 refuted. 0 times theorem prover too weak. 998 trivial. 0 not checked. [2021-12-15 14:03:25,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:25,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663013229] [2021-12-15 14:03:25,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663013229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:25,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129172212] [2021-12-15 14:03:25,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 14:03:25,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:25,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:25,486 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 14:03:25,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-15 14:03:25,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 14:03:25,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:25,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-15 14:03:25,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11597 backedges. 1243 proven. 9710 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-12-15 14:03:26,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11597 backedges. 1243 proven. 9710 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-12-15 14:03:27,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129172212] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:27,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:27,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 34, 34] total 68 [2021-12-15 14:03:27,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296086494] [2021-12-15 14:03:27,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:27,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-15 14:03:27,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:27,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-15 14:03:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=3249, Unknown=0, NotChecked=0, Total=4556 [2021-12-15 14:03:27,816 INFO L87 Difference]: Start difference. First operand 412 states and 430 transitions. Second operand has 68 states, 68 states have (on average 6.470588235294118) internal successors, (440), 68 states have internal predecessors, (440), 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) [2021-12-15 14:03:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:33,165 INFO L93 Difference]: Finished difference Result 1333 states and 1429 transitions. [2021-12-15 14:03:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-12-15 14:03:33,165 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 6.470588235294118) internal successors, (440), 68 states have internal predecessors, (440), 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) Word has length 391 [2021-12-15 14:03:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:33,168 INFO L225 Difference]: With dead ends: 1333 [2021-12-15 14:03:33,169 INFO L226 Difference]: Without dead ends: 1333 [2021-12-15 14:03:33,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 736 SyntacticMatches, 1 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51377 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=28784, Invalid=68248, Unknown=0, NotChecked=0, Total=97032 [2021-12-15 14:03:33,179 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 693 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:33,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 158 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 14:03:33,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-12-15 14:03:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1322. [2021-12-15 14:03:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.073429220287661) internal successors, (1418), 1321 states have internal predecessors, (1418), 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) [2021-12-15 14:03:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1418 transitions. [2021-12-15 14:03:33,192 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1418 transitions. Word has length 391 [2021-12-15 14:03:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:33,193 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1418 transitions. [2021-12-15 14:03:33,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 6.470588235294118) internal successors, (440), 68 states have internal predecessors, (440), 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) [2021-12-15 14:03:33,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1418 transitions. [2021-12-15 14:03:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 912 [2021-12-15 14:03:33,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:33,199 INFO L514 BasicCegarLoop]: trace histogram [157, 156, 156, 156, 156, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-12-15 14:03:33,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:33,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:33,416 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:33,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:33,416 INFO L85 PathProgramCache]: Analyzing trace with hash 101068528, now seen corresponding path program 11 times [2021-12-15 14:03:33,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:33,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196068039] [2021-12-15 14:03:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:33,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 64677 backedges. 33501 proven. 2819 refuted. 0 times theorem prover too weak. 28357 trivial. 0 not checked. [2021-12-15 14:03:33,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196068039] [2021-12-15 14:03:33,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196068039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980650274] [2021-12-15 14:03:33,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 14:03:33,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:33,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:33,909 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 14:03:33,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-15 14:03:34,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-15 14:03:34,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:34,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 14:03:34,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 64677 backedges. 33683 proven. 2520 refuted. 0 times theorem prover too weak. 28474 trivial. 0 not checked. [2021-12-15 14:03:35,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 64677 backedges. 34354 proven. 1849 refuted. 0 times theorem prover too weak. 28474 trivial. 0 not checked. [2021-12-15 14:03:36,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980650274] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:36,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:36,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 42 [2021-12-15 14:03:36,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268109405] [2021-12-15 14:03:36,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:36,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-15 14:03:36,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:36,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-15 14:03:36,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1383, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 14:03:36,513 INFO L87 Difference]: Start difference. First operand 1322 states and 1418 transitions. Second operand has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 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) [2021-12-15 14:03:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:37,795 INFO L93 Difference]: Finished difference Result 1322 states and 1407 transitions. [2021-12-15 14:03:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-15 14:03:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 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) Word has length 911 [2021-12-15 14:03:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:37,817 INFO L225 Difference]: With dead ends: 1322 [2021-12-15 14:03:37,817 INFO L226 Difference]: Without dead ends: 1322 [2021-12-15 14:03:37,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1909 GetRequests, 1802 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2523, Invalid=9249, Unknown=0, NotChecked=0, Total=11772 [2021-12-15 14:03:37,819 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 178 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:37,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 210 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 14:03:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-12-15 14:03:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1322. [2021-12-15 14:03:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.065102195306586) internal successors, (1407), 1321 states have internal predecessors, (1407), 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) [2021-12-15 14:03:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1407 transitions. [2021-12-15 14:03:37,844 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1407 transitions. Word has length 911 [2021-12-15 14:03:37,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:37,844 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1407 transitions. [2021-12-15 14:03:37,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.380952380952381) internal successors, (268), 42 states have internal predecessors, (268), 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) [2021-12-15 14:03:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1407 transitions. [2021-12-15 14:03:37,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2021-12-15 14:03:37,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:37,863 INFO L514 BasicCegarLoop]: trace histogram [167, 166, 166, 166, 166, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-12-15 14:03:37,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:38,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:38,083 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:38,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1688945128, now seen corresponding path program 12 times [2021-12-15 14:03:38,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:38,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747800994] [2021-12-15 14:03:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:38,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 72902 backedges. 41263 proven. 3733 refuted. 0 times theorem prover too weak. 27906 trivial. 0 not checked. [2021-12-15 14:03:38,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:38,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747800994] [2021-12-15 14:03:38,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747800994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:38,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095792741] [2021-12-15 14:03:38,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 14:03:38,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:38,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:38,808 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 14:03:38,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-15 14:03:39,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-12-15 14:03:39,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:39,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 14:03:39,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 72902 backedges. 22608 proven. 1400 refuted. 0 times theorem prover too weak. 48894 trivial. 0 not checked. [2021-12-15 14:03:40,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 72902 backedges. 22523 proven. 1485 refuted. 0 times theorem prover too weak. 48894 trivial. 0 not checked. [2021-12-15 14:03:40,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095792741] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:40,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:40,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 57 [2021-12-15 14:03:40,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12759253] [2021-12-15 14:03:40,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:40,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-15 14:03:40,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-15 14:03:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=2624, Unknown=0, NotChecked=0, Total=3192 [2021-12-15 14:03:40,994 INFO L87 Difference]: Start difference. First operand 1322 states and 1407 transitions. Second operand has 57 states, 57 states have (on average 5.719298245614035) internal successors, (326), 57 states have internal predecessors, (326), 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) [2021-12-15 14:03:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:45,826 INFO L93 Difference]: Finished difference Result 1500 states and 1587 transitions. [2021-12-15 14:03:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-12-15 14:03:45,826 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 5.719298245614035) internal successors, (326), 57 states have internal predecessors, (326), 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) Word has length 961 [2021-12-15 14:03:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:45,829 INFO L225 Difference]: With dead ends: 1500 [2021-12-15 14:03:45,829 INFO L226 Difference]: Without dead ends: 1500 [2021-12-15 14:03:45,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2133 GetRequests, 1889 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19547 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=12029, Invalid=48241, Unknown=0, NotChecked=0, Total=60270 [2021-12-15 14:03:45,834 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2506 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 2074 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2506 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 2074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:45,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2506 Valid, 270 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 2074 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 14:03:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-12-15 14:03:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1439. [2021-12-15 14:03:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.0611961057023644) internal successors, (1526), 1438 states have internal predecessors, (1526), 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) [2021-12-15 14:03:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1526 transitions. [2021-12-15 14:03:45,864 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1526 transitions. Word has length 961 [2021-12-15 14:03:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:45,864 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1526 transitions. [2021-12-15 14:03:45,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.719298245614035) internal successors, (326), 57 states have internal predecessors, (326), 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) [2021-12-15 14:03:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1526 transitions. [2021-12-15 14:03:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2021-12-15 14:03:45,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:45,872 INFO L514 BasicCegarLoop]: trace histogram [187, 186, 186, 186, 186, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-12-15 14:03:45,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:46,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:46,077 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:46,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:46,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1610252424, now seen corresponding path program 13 times [2021-12-15 14:03:46,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:46,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029849091] [2021-12-15 14:03:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:46,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 90852 backedges. 53705 proven. 4821 refuted. 0 times theorem prover too weak. 32326 trivial. 0 not checked. [2021-12-15 14:03:46,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:46,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029849091] [2021-12-15 14:03:46,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029849091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:46,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297950076] [2021-12-15 14:03:46,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 14:03:46,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:46,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:46,784 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 14:03:46,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-15 14:03:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:47,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 3251 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 14:03:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 90852 backedges. 54480 proven. 4046 refuted. 0 times theorem prover too weak. 32326 trivial. 0 not checked. [2021-12-15 14:03:48,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 90852 backedges. 54480 proven. 4046 refuted. 0 times theorem prover too weak. 32326 trivial. 0 not checked. [2021-12-15 14:03:49,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297950076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:49,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:49,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 39 [2021-12-15 14:03:49,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892288895] [2021-12-15 14:03:49,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:49,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 14:03:49,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:49,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 14:03:49,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 14:03:49,267 INFO L87 Difference]: Start difference. First operand 1439 states and 1526 transitions. Second operand has 39 states, 39 states have (on average 6.871794871794871) internal successors, (268), 39 states have internal predecessors, (268), 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) [2021-12-15 14:03:50,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:50,176 INFO L93 Difference]: Finished difference Result 1439 states and 1516 transitions. [2021-12-15 14:03:50,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-15 14:03:50,176 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.871794871794871) internal successors, (268), 39 states have internal predecessors, (268), 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) Word has length 1061 [2021-12-15 14:03:50,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:50,179 INFO L225 Difference]: With dead ends: 1439 [2021-12-15 14:03:50,179 INFO L226 Difference]: Without dead ends: 1439 [2021-12-15 14:03:50,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2223 GetRequests, 2108 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3976 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3641, Invalid=9931, Unknown=0, NotChecked=0, Total=13572 [2021-12-15 14:03:50,181 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 128 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:50,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 372 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 14:03:50,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-12-15 14:03:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1439. [2021-12-15 14:03:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.0542420027816413) internal successors, (1516), 1438 states have internal predecessors, (1516), 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) [2021-12-15 14:03:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1516 transitions. [2021-12-15 14:03:50,193 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1516 transitions. Word has length 1061 [2021-12-15 14:03:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:50,194 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1516 transitions. [2021-12-15 14:03:50,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.871794871794871) internal successors, (268), 39 states have internal predecessors, (268), 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) [2021-12-15 14:03:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1516 transitions. [2021-12-15 14:03:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1097 [2021-12-15 14:03:50,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:50,202 INFO L514 BasicCegarLoop]: trace histogram [194, 193, 193, 193, 193, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-12-15 14:03:50,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:50,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-15 14:03:50,423 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1882823689, now seen corresponding path program 14 times [2021-12-15 14:03:50,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:50,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752531627] [2021-12-15 14:03:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:50,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 97607 backedges. 62243 proven. 6098 refuted. 0 times theorem prover too weak. 29266 trivial. 0 not checked. [2021-12-15 14:03:51,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:51,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752531627] [2021-12-15 14:03:51,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752531627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:51,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311339075] [2021-12-15 14:03:51,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 14:03:51,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:51,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:51,096 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 14:03:51,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-15 14:03:51,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 14:03:51,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:51,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 3349 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 14:03:51,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 97607 backedges. 63159 proven. 5182 refuted. 0 times theorem prover too weak. 29266 trivial. 0 not checked. [2021-12-15 14:03:52,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:03:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 97607 backedges. 63159 proven. 5182 refuted. 0 times theorem prover too weak. 29266 trivial. 0 not checked. [2021-12-15 14:03:53,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311339075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:03:53,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:03:53,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 42 [2021-12-15 14:03:53,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021916844] [2021-12-15 14:03:53,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:03:53,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-15 14:03:53,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:03:53,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-15 14:03:53,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 14:03:53,991 INFO L87 Difference]: Start difference. First operand 1439 states and 1516 transitions. Second operand has 42 states, 42 states have (on average 6.904761904761905) internal successors, (290), 42 states have internal predecessors, (290), 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) [2021-12-15 14:03:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:03:55,758 INFO L93 Difference]: Finished difference Result 1439 states and 1507 transitions. [2021-12-15 14:03:55,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-15 14:03:55,760 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.904761904761905) internal successors, (290), 42 states have internal predecessors, (290), 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) Word has length 1096 [2021-12-15 14:03:55,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:03:55,763 INFO L225 Difference]: With dead ends: 1439 [2021-12-15 14:03:55,763 INFO L226 Difference]: Without dead ends: 1439 [2021-12-15 14:03:55,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2308 GetRequests, 2177 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5270 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4754, Invalid=12802, Unknown=0, NotChecked=0, Total=17556 [2021-12-15 14:03:55,765 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 138 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 14:03:55,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 242 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 14:03:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-12-15 14:03:55,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1439. [2021-12-15 14:03:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.0479833101529903) internal successors, (1507), 1438 states have internal predecessors, (1507), 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) [2021-12-15 14:03:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1507 transitions. [2021-12-15 14:03:55,798 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1507 transitions. Word has length 1096 [2021-12-15 14:03:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:03:55,798 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1507 transitions. [2021-12-15 14:03:55,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.904761904761905) internal successors, (290), 42 states have internal predecessors, (290), 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) [2021-12-15 14:03:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1507 transitions. [2021-12-15 14:03:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1127 [2021-12-15 14:03:55,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:03:55,806 INFO L514 BasicCegarLoop]: trace histogram [200, 199, 199, 199, 199, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-12-15 14:03:55,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-15 14:03:56,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-15 14:03:56,007 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:03:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:03:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash -473738113, now seen corresponding path program 15 times [2021-12-15 14:03:56,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:03:56,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236685060] [2021-12-15 14:03:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:03:56,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:03:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:03:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 103592 backedges. 70526 proven. 7579 refuted. 0 times theorem prover too weak. 25487 trivial. 0 not checked. [2021-12-15 14:03:56,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:03:56,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236685060] [2021-12-15 14:03:56,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236685060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:03:56,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086100680] [2021-12-15 14:03:56,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 14:03:56,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:03:56,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:03:56,660 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 14:03:56,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-15 14:03:57,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-12-15 14:03:57,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 14:03:57,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 14:03:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:03:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 103592 backedges. 20238 proven. 1199 refuted. 0 times theorem prover too weak. 82155 trivial. 0 not checked. [2021-12-15 14:03:59,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 14:04:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 103592 backedges. 20238 proven. 1199 refuted. 0 times theorem prover too weak. 82155 trivial. 0 not checked. [2021-12-15 14:04:00,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086100680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 14:04:00,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 14:04:00,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 64 [2021-12-15 14:04:00,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192468012] [2021-12-15 14:04:00,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 14:04:00,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-15 14:04:00,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:04:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-15 14:04:00,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=3227, Unknown=0, NotChecked=0, Total=4032 [2021-12-15 14:04:00,526 INFO L87 Difference]: Start difference. First operand 1439 states and 1507 transitions. Second operand has 64 states, 64 states have (on average 6.3125) internal successors, (404), 64 states have internal predecessors, (404), 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) [2021-12-15 14:04:06,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:04:06,000 INFO L93 Difference]: Finished difference Result 1846 states and 1926 transitions. [2021-12-15 14:04:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-12-15 14:04:06,000 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 6.3125) internal successors, (404), 64 states have internal predecessors, (404), 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) Word has length 1126 [2021-12-15 14:04:06,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:04:06,004 INFO L225 Difference]: With dead ends: 1846 [2021-12-15 14:04:06,004 INFO L226 Difference]: Without dead ends: 1846 [2021-12-15 14:04:06,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2463 GetRequests, 2217 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17819 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12497, Invalid=48265, Unknown=0, NotChecked=0, Total=60762 [2021-12-15 14:04:06,007 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1135 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 14:04:06,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 345 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 2634 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 14:04:06,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-12-15 14:04:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1489. [2021-12-15 14:04:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 1.0477150537634408) internal successors, (1559), 1488 states have internal predecessors, (1559), 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) [2021-12-15 14:04:06,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1559 transitions. [2021-12-15 14:04:06,020 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1559 transitions. Word has length 1126 [2021-12-15 14:04:06,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:04:06,021 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 1559 transitions. [2021-12-15 14:04:06,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 6.3125) internal successors, (404), 64 states have internal predecessors, (404), 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) [2021-12-15 14:04:06,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1559 transitions. [2021-12-15 14:04:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1202 [2021-12-15 14:04:06,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:04:06,030 INFO L514 BasicCegarLoop]: trace histogram [215, 214, 214, 214, 214, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2021-12-15 14:04:06,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-15 14:04:06,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-15 14:04:06,249 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 14:04:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:04:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash 72847848, now seen corresponding path program 16 times [2021-12-15 14:04:06,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:04:06,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572893220] [2021-12-15 14:04:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:04:06,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:04:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:04:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 119342 backedges. 84238 proven. 9279 refuted. 0 times theorem prover too weak. 25825 trivial. 0 not checked. [2021-12-15 14:04:07,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:04:07,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572893220] [2021-12-15 14:04:07,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572893220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 14:04:07,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255819691] [2021-12-15 14:04:07,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 14:04:07,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 14:04:07,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:04:07,408 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 14:04:07,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process